1e505edaeSJeff LaBundy // SPDX-License-Identifier: GPL-2.0-or-later 2e505edaeSJeff LaBundy /* 3e505edaeSJeff LaBundy * Azoteq IQS7222A/B/C Capacitive Touch Controller 4e505edaeSJeff LaBundy * 5e505edaeSJeff LaBundy * Copyright (C) 2022 Jeff LaBundy <jeff@labundy.com> 6e505edaeSJeff LaBundy */ 7e505edaeSJeff LaBundy 8e505edaeSJeff LaBundy #include <linux/bits.h> 9e505edaeSJeff LaBundy #include <linux/delay.h> 10e505edaeSJeff LaBundy #include <linux/device.h> 11e505edaeSJeff LaBundy #include <linux/err.h> 12e505edaeSJeff LaBundy #include <linux/gpio/consumer.h> 13e505edaeSJeff LaBundy #include <linux/i2c.h> 14e505edaeSJeff LaBundy #include <linux/input.h> 15e505edaeSJeff LaBundy #include <linux/interrupt.h> 16e505edaeSJeff LaBundy #include <linux/kernel.h> 17e505edaeSJeff LaBundy #include <linux/ktime.h> 18e505edaeSJeff LaBundy #include <linux/module.h> 19e505edaeSJeff LaBundy #include <linux/of_device.h> 20e505edaeSJeff LaBundy #include <linux/property.h> 21e505edaeSJeff LaBundy #include <linux/slab.h> 22e505edaeSJeff LaBundy #include <asm/unaligned.h> 23e505edaeSJeff LaBundy 24e505edaeSJeff LaBundy #define IQS7222_PROD_NUM 0x00 25e505edaeSJeff LaBundy #define IQS7222_PROD_NUM_A 840 26e505edaeSJeff LaBundy #define IQS7222_PROD_NUM_B 698 27e505edaeSJeff LaBundy #define IQS7222_PROD_NUM_C 863 28e505edaeSJeff LaBundy 29e505edaeSJeff LaBundy #define IQS7222_SYS_STATUS 0x10 30e505edaeSJeff LaBundy #define IQS7222_SYS_STATUS_RESET BIT(3) 31e505edaeSJeff LaBundy #define IQS7222_SYS_STATUS_ATI_ERROR BIT(1) 32e505edaeSJeff LaBundy #define IQS7222_SYS_STATUS_ATI_ACTIVE BIT(0) 33e505edaeSJeff LaBundy 34e505edaeSJeff LaBundy #define IQS7222_CHAN_SETUP_0_REF_MODE_MASK GENMASK(15, 14) 35e505edaeSJeff LaBundy #define IQS7222_CHAN_SETUP_0_REF_MODE_FOLLOW BIT(15) 36e505edaeSJeff LaBundy #define IQS7222_CHAN_SETUP_0_REF_MODE_REF BIT(14) 37e505edaeSJeff LaBundy #define IQS7222_CHAN_SETUP_0_CHAN_EN BIT(8) 38e505edaeSJeff LaBundy 39e505edaeSJeff LaBundy #define IQS7222_SLDR_SETUP_0_CHAN_CNT_MASK GENMASK(2, 0) 40e505edaeSJeff LaBundy #define IQS7222_SLDR_SETUP_2_RES_MASK GENMASK(15, 8) 41e505edaeSJeff LaBundy #define IQS7222_SLDR_SETUP_2_RES_SHIFT 8 42e505edaeSJeff LaBundy #define IQS7222_SLDR_SETUP_2_TOP_SPEED_MASK GENMASK(7, 0) 43e505edaeSJeff LaBundy 44e505edaeSJeff LaBundy #define IQS7222_GPIO_SETUP_0_GPIO_EN BIT(0) 45e505edaeSJeff LaBundy 46e505edaeSJeff LaBundy #define IQS7222_SYS_SETUP 0xD0 47e505edaeSJeff LaBundy #define IQS7222_SYS_SETUP_INTF_MODE_MASK GENMASK(7, 6) 48e505edaeSJeff LaBundy #define IQS7222_SYS_SETUP_INTF_MODE_TOUCH BIT(7) 49e505edaeSJeff LaBundy #define IQS7222_SYS_SETUP_INTF_MODE_EVENT BIT(6) 50e505edaeSJeff LaBundy #define IQS7222_SYS_SETUP_PWR_MODE_MASK GENMASK(5, 4) 51e505edaeSJeff LaBundy #define IQS7222_SYS_SETUP_PWR_MODE_AUTO IQS7222_SYS_SETUP_PWR_MODE_MASK 52e505edaeSJeff LaBundy #define IQS7222_SYS_SETUP_REDO_ATI BIT(2) 53e505edaeSJeff LaBundy #define IQS7222_SYS_SETUP_ACK_RESET BIT(0) 54e505edaeSJeff LaBundy 55e505edaeSJeff LaBundy #define IQS7222_EVENT_MASK_ATI BIT(12) 5695215d3dSJeff LaBundy #define IQS7222_EVENT_MASK_SLDR BIT(10) 5795215d3dSJeff LaBundy #define IQS7222_EVENT_MASK_TOUCH BIT(1) 5895215d3dSJeff LaBundy #define IQS7222_EVENT_MASK_PROX BIT(0) 59e505edaeSJeff LaBundy 60e505edaeSJeff LaBundy #define IQS7222_COMMS_HOLD BIT(0) 61e505edaeSJeff LaBundy #define IQS7222_COMMS_ERROR 0xEEEE 62e505edaeSJeff LaBundy #define IQS7222_COMMS_RETRY_MS 50 63e505edaeSJeff LaBundy #define IQS7222_COMMS_TIMEOUT_MS 100 64e505edaeSJeff LaBundy #define IQS7222_RESET_TIMEOUT_MS 250 65e505edaeSJeff LaBundy #define IQS7222_ATI_TIMEOUT_MS 2000 66e505edaeSJeff LaBundy 67e505edaeSJeff LaBundy #define IQS7222_MAX_COLS_STAT 8 68e505edaeSJeff LaBundy #define IQS7222_MAX_COLS_CYCLE 3 69e505edaeSJeff LaBundy #define IQS7222_MAX_COLS_GLBL 3 70e505edaeSJeff LaBundy #define IQS7222_MAX_COLS_BTN 3 71e505edaeSJeff LaBundy #define IQS7222_MAX_COLS_CHAN 6 72e505edaeSJeff LaBundy #define IQS7222_MAX_COLS_FILT 2 73e505edaeSJeff LaBundy #define IQS7222_MAX_COLS_SLDR 11 74e505edaeSJeff LaBundy #define IQS7222_MAX_COLS_GPIO 3 75e505edaeSJeff LaBundy #define IQS7222_MAX_COLS_SYS 13 76e505edaeSJeff LaBundy 77e505edaeSJeff LaBundy #define IQS7222_MAX_CHAN 20 78e505edaeSJeff LaBundy #define IQS7222_MAX_SLDR 2 79e505edaeSJeff LaBundy 80e505edaeSJeff LaBundy #define IQS7222_NUM_RETRIES 5 81e505edaeSJeff LaBundy #define IQS7222_REG_OFFSET 0x100 82e505edaeSJeff LaBundy 83e505edaeSJeff LaBundy enum iqs7222_reg_key_id { 84e505edaeSJeff LaBundy IQS7222_REG_KEY_NONE, 85e505edaeSJeff LaBundy IQS7222_REG_KEY_PROX, 86e505edaeSJeff LaBundy IQS7222_REG_KEY_TOUCH, 87e505edaeSJeff LaBundy IQS7222_REG_KEY_DEBOUNCE, 88e505edaeSJeff LaBundy IQS7222_REG_KEY_TAP, 89e505edaeSJeff LaBundy IQS7222_REG_KEY_AXIAL, 90e505edaeSJeff LaBundy IQS7222_REG_KEY_WHEEL, 91e505edaeSJeff LaBundy IQS7222_REG_KEY_NO_WHEEL, 92e505edaeSJeff LaBundy IQS7222_REG_KEY_RESERVED 93e505edaeSJeff LaBundy }; 94e505edaeSJeff LaBundy 95e505edaeSJeff LaBundy enum iqs7222_reg_grp_id { 96e505edaeSJeff LaBundy IQS7222_REG_GRP_STAT, 972e70ef52SJeff LaBundy IQS7222_REG_GRP_FILT, 98e505edaeSJeff LaBundy IQS7222_REG_GRP_CYCLE, 99e505edaeSJeff LaBundy IQS7222_REG_GRP_GLBL, 100e505edaeSJeff LaBundy IQS7222_REG_GRP_BTN, 101e505edaeSJeff LaBundy IQS7222_REG_GRP_CHAN, 102e505edaeSJeff LaBundy IQS7222_REG_GRP_SLDR, 103e505edaeSJeff LaBundy IQS7222_REG_GRP_GPIO, 104e505edaeSJeff LaBundy IQS7222_REG_GRP_SYS, 105e505edaeSJeff LaBundy IQS7222_NUM_REG_GRPS 106e505edaeSJeff LaBundy }; 107e505edaeSJeff LaBundy 108e505edaeSJeff LaBundy static const char * const iqs7222_reg_grp_names[] = { 109e505edaeSJeff LaBundy [IQS7222_REG_GRP_CYCLE] = "cycle", 110e505edaeSJeff LaBundy [IQS7222_REG_GRP_CHAN] = "channel", 111e505edaeSJeff LaBundy [IQS7222_REG_GRP_SLDR] = "slider", 112e505edaeSJeff LaBundy [IQS7222_REG_GRP_GPIO] = "gpio", 113e505edaeSJeff LaBundy }; 114e505edaeSJeff LaBundy 115e505edaeSJeff LaBundy static const unsigned int iqs7222_max_cols[] = { 116e505edaeSJeff LaBundy [IQS7222_REG_GRP_STAT] = IQS7222_MAX_COLS_STAT, 117e505edaeSJeff LaBundy [IQS7222_REG_GRP_CYCLE] = IQS7222_MAX_COLS_CYCLE, 118e505edaeSJeff LaBundy [IQS7222_REG_GRP_GLBL] = IQS7222_MAX_COLS_GLBL, 119e505edaeSJeff LaBundy [IQS7222_REG_GRP_BTN] = IQS7222_MAX_COLS_BTN, 120e505edaeSJeff LaBundy [IQS7222_REG_GRP_CHAN] = IQS7222_MAX_COLS_CHAN, 121e505edaeSJeff LaBundy [IQS7222_REG_GRP_FILT] = IQS7222_MAX_COLS_FILT, 122e505edaeSJeff LaBundy [IQS7222_REG_GRP_SLDR] = IQS7222_MAX_COLS_SLDR, 123e505edaeSJeff LaBundy [IQS7222_REG_GRP_GPIO] = IQS7222_MAX_COLS_GPIO, 124e505edaeSJeff LaBundy [IQS7222_REG_GRP_SYS] = IQS7222_MAX_COLS_SYS, 125e505edaeSJeff LaBundy }; 126e505edaeSJeff LaBundy 127e505edaeSJeff LaBundy static const unsigned int iqs7222_gpio_links[] = { 2, 5, 6, }; 128e505edaeSJeff LaBundy 129e505edaeSJeff LaBundy struct iqs7222_event_desc { 130e505edaeSJeff LaBundy const char *name; 131e505edaeSJeff LaBundy u16 mask; 132e505edaeSJeff LaBundy u16 val; 133e505edaeSJeff LaBundy u16 enable; 134e505edaeSJeff LaBundy enum iqs7222_reg_key_id reg_key; 135e505edaeSJeff LaBundy }; 136e505edaeSJeff LaBundy 137e505edaeSJeff LaBundy static const struct iqs7222_event_desc iqs7222_kp_events[] = { 138e505edaeSJeff LaBundy { 139e505edaeSJeff LaBundy .name = "event-prox", 14095215d3dSJeff LaBundy .enable = IQS7222_EVENT_MASK_PROX, 141e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_PROX, 142e505edaeSJeff LaBundy }, 143e505edaeSJeff LaBundy { 144e505edaeSJeff LaBundy .name = "event-touch", 14595215d3dSJeff LaBundy .enable = IQS7222_EVENT_MASK_TOUCH, 146e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_TOUCH, 147e505edaeSJeff LaBundy }, 148e505edaeSJeff LaBundy }; 149e505edaeSJeff LaBundy 150e505edaeSJeff LaBundy static const struct iqs7222_event_desc iqs7222_sl_events[] = { 151e505edaeSJeff LaBundy { .name = "event-press", }, 152e505edaeSJeff LaBundy { 153e505edaeSJeff LaBundy .name = "event-tap", 154e505edaeSJeff LaBundy .mask = BIT(0), 155e505edaeSJeff LaBundy .val = BIT(0), 156e505edaeSJeff LaBundy .enable = BIT(0), 157e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_TAP, 158e505edaeSJeff LaBundy }, 159e505edaeSJeff LaBundy { 160e505edaeSJeff LaBundy .name = "event-swipe-pos", 161e505edaeSJeff LaBundy .mask = BIT(5) | BIT(1), 162e505edaeSJeff LaBundy .val = BIT(1), 163e505edaeSJeff LaBundy .enable = BIT(1), 164e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_AXIAL, 165e505edaeSJeff LaBundy }, 166e505edaeSJeff LaBundy { 167e505edaeSJeff LaBundy .name = "event-swipe-neg", 168e505edaeSJeff LaBundy .mask = BIT(5) | BIT(1), 169e505edaeSJeff LaBundy .val = BIT(5) | BIT(1), 170e505edaeSJeff LaBundy .enable = BIT(1), 171e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_AXIAL, 172e505edaeSJeff LaBundy }, 173e505edaeSJeff LaBundy { 174e505edaeSJeff LaBundy .name = "event-flick-pos", 175e505edaeSJeff LaBundy .mask = BIT(5) | BIT(2), 176e505edaeSJeff LaBundy .val = BIT(2), 177e505edaeSJeff LaBundy .enable = BIT(2), 178e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_AXIAL, 179e505edaeSJeff LaBundy }, 180e505edaeSJeff LaBundy { 181e505edaeSJeff LaBundy .name = "event-flick-neg", 182e505edaeSJeff LaBundy .mask = BIT(5) | BIT(2), 183e505edaeSJeff LaBundy .val = BIT(5) | BIT(2), 184e505edaeSJeff LaBundy .enable = BIT(2), 185e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_AXIAL, 186e505edaeSJeff LaBundy }, 187e505edaeSJeff LaBundy }; 188e505edaeSJeff LaBundy 189e505edaeSJeff LaBundy struct iqs7222_reg_grp_desc { 190e505edaeSJeff LaBundy u16 base; 191e505edaeSJeff LaBundy int num_row; 192e505edaeSJeff LaBundy int num_col; 193e505edaeSJeff LaBundy }; 194e505edaeSJeff LaBundy 195e505edaeSJeff LaBundy struct iqs7222_dev_desc { 196e505edaeSJeff LaBundy u16 prod_num; 197e505edaeSJeff LaBundy u16 fw_major; 198e505edaeSJeff LaBundy u16 fw_minor; 199e505edaeSJeff LaBundy u16 sldr_res; 200e505edaeSJeff LaBundy u16 touch_link; 201e505edaeSJeff LaBundy u16 wheel_enable; 202e505edaeSJeff LaBundy int allow_offset; 203e505edaeSJeff LaBundy int event_offset; 204e505edaeSJeff LaBundy int comms_offset; 205e505edaeSJeff LaBundy struct iqs7222_reg_grp_desc reg_grps[IQS7222_NUM_REG_GRPS]; 206e505edaeSJeff LaBundy }; 207e505edaeSJeff LaBundy 208e505edaeSJeff LaBundy static const struct iqs7222_dev_desc iqs7222_devs[] = { 209e505edaeSJeff LaBundy { 210e505edaeSJeff LaBundy .prod_num = IQS7222_PROD_NUM_A, 211e505edaeSJeff LaBundy .fw_major = 1, 212e505edaeSJeff LaBundy .fw_minor = 12, 213e505edaeSJeff LaBundy .sldr_res = U8_MAX * 16, 214e505edaeSJeff LaBundy .touch_link = 1768, 215e505edaeSJeff LaBundy .allow_offset = 9, 216e505edaeSJeff LaBundy .event_offset = 10, 217e505edaeSJeff LaBundy .comms_offset = 12, 218e505edaeSJeff LaBundy .reg_grps = { 219e505edaeSJeff LaBundy [IQS7222_REG_GRP_STAT] = { 220e505edaeSJeff LaBundy .base = IQS7222_SYS_STATUS, 221e505edaeSJeff LaBundy .num_row = 1, 222e505edaeSJeff LaBundy .num_col = 8, 223e505edaeSJeff LaBundy }, 224e505edaeSJeff LaBundy [IQS7222_REG_GRP_CYCLE] = { 225e505edaeSJeff LaBundy .base = 0x8000, 226e505edaeSJeff LaBundy .num_row = 7, 227e505edaeSJeff LaBundy .num_col = 3, 228e505edaeSJeff LaBundy }, 229e505edaeSJeff LaBundy [IQS7222_REG_GRP_GLBL] = { 230e505edaeSJeff LaBundy .base = 0x8700, 231e505edaeSJeff LaBundy .num_row = 1, 232e505edaeSJeff LaBundy .num_col = 3, 233e505edaeSJeff LaBundy }, 234e505edaeSJeff LaBundy [IQS7222_REG_GRP_BTN] = { 235e505edaeSJeff LaBundy .base = 0x9000, 236e505edaeSJeff LaBundy .num_row = 12, 237e505edaeSJeff LaBundy .num_col = 3, 238e505edaeSJeff LaBundy }, 239e505edaeSJeff LaBundy [IQS7222_REG_GRP_CHAN] = { 240e505edaeSJeff LaBundy .base = 0xA000, 241e505edaeSJeff LaBundy .num_row = 12, 242e505edaeSJeff LaBundy .num_col = 6, 243e505edaeSJeff LaBundy }, 244e505edaeSJeff LaBundy [IQS7222_REG_GRP_FILT] = { 245e505edaeSJeff LaBundy .base = 0xAC00, 246e505edaeSJeff LaBundy .num_row = 1, 247e505edaeSJeff LaBundy .num_col = 2, 248e505edaeSJeff LaBundy }, 249e505edaeSJeff LaBundy [IQS7222_REG_GRP_SLDR] = { 250e505edaeSJeff LaBundy .base = 0xB000, 251e505edaeSJeff LaBundy .num_row = 2, 252e505edaeSJeff LaBundy .num_col = 11, 253e505edaeSJeff LaBundy }, 254e505edaeSJeff LaBundy [IQS7222_REG_GRP_GPIO] = { 255e505edaeSJeff LaBundy .base = 0xC000, 256e505edaeSJeff LaBundy .num_row = 1, 257e505edaeSJeff LaBundy .num_col = 3, 258e505edaeSJeff LaBundy }, 259e505edaeSJeff LaBundy [IQS7222_REG_GRP_SYS] = { 260e505edaeSJeff LaBundy .base = IQS7222_SYS_SETUP, 261e505edaeSJeff LaBundy .num_row = 1, 262e505edaeSJeff LaBundy .num_col = 13, 263e505edaeSJeff LaBundy }, 264e505edaeSJeff LaBundy }, 265e505edaeSJeff LaBundy }, 266e505edaeSJeff LaBundy { 267e505edaeSJeff LaBundy .prod_num = IQS7222_PROD_NUM_B, 268e505edaeSJeff LaBundy .fw_major = 1, 269e505edaeSJeff LaBundy .fw_minor = 43, 270e505edaeSJeff LaBundy .event_offset = 10, 271e505edaeSJeff LaBundy .comms_offset = 11, 272e505edaeSJeff LaBundy .reg_grps = { 273e505edaeSJeff LaBundy [IQS7222_REG_GRP_STAT] = { 274e505edaeSJeff LaBundy .base = IQS7222_SYS_STATUS, 275e505edaeSJeff LaBundy .num_row = 1, 276e505edaeSJeff LaBundy .num_col = 6, 277e505edaeSJeff LaBundy }, 278e505edaeSJeff LaBundy [IQS7222_REG_GRP_CYCLE] = { 279e505edaeSJeff LaBundy .base = 0x8000, 280e505edaeSJeff LaBundy .num_row = 10, 281e505edaeSJeff LaBundy .num_col = 2, 282e505edaeSJeff LaBundy }, 283e505edaeSJeff LaBundy [IQS7222_REG_GRP_GLBL] = { 284e505edaeSJeff LaBundy .base = 0x8A00, 285e505edaeSJeff LaBundy .num_row = 1, 286e505edaeSJeff LaBundy .num_col = 3, 287e505edaeSJeff LaBundy }, 288e505edaeSJeff LaBundy [IQS7222_REG_GRP_BTN] = { 289e505edaeSJeff LaBundy .base = 0x9000, 290e505edaeSJeff LaBundy .num_row = 20, 291e505edaeSJeff LaBundy .num_col = 2, 292e505edaeSJeff LaBundy }, 293e505edaeSJeff LaBundy [IQS7222_REG_GRP_CHAN] = { 294e505edaeSJeff LaBundy .base = 0xB000, 295e505edaeSJeff LaBundy .num_row = 20, 296e505edaeSJeff LaBundy .num_col = 4, 297e505edaeSJeff LaBundy }, 298e505edaeSJeff LaBundy [IQS7222_REG_GRP_FILT] = { 299e505edaeSJeff LaBundy .base = 0xC400, 300e505edaeSJeff LaBundy .num_row = 1, 301e505edaeSJeff LaBundy .num_col = 2, 302e505edaeSJeff LaBundy }, 303e505edaeSJeff LaBundy [IQS7222_REG_GRP_SYS] = { 304e505edaeSJeff LaBundy .base = IQS7222_SYS_SETUP, 305e505edaeSJeff LaBundy .num_row = 1, 306e505edaeSJeff LaBundy .num_col = 13, 307e505edaeSJeff LaBundy }, 308e505edaeSJeff LaBundy }, 309e505edaeSJeff LaBundy }, 310e505edaeSJeff LaBundy { 311e505edaeSJeff LaBundy .prod_num = IQS7222_PROD_NUM_B, 312e505edaeSJeff LaBundy .fw_major = 1, 313e505edaeSJeff LaBundy .fw_minor = 27, 314e505edaeSJeff LaBundy .reg_grps = { 315e505edaeSJeff LaBundy [IQS7222_REG_GRP_STAT] = { 316e505edaeSJeff LaBundy .base = IQS7222_SYS_STATUS, 317e505edaeSJeff LaBundy .num_row = 1, 318e505edaeSJeff LaBundy .num_col = 6, 319e505edaeSJeff LaBundy }, 320e505edaeSJeff LaBundy [IQS7222_REG_GRP_CYCLE] = { 321e505edaeSJeff LaBundy .base = 0x8000, 322e505edaeSJeff LaBundy .num_row = 10, 323e505edaeSJeff LaBundy .num_col = 2, 324e505edaeSJeff LaBundy }, 325e505edaeSJeff LaBundy [IQS7222_REG_GRP_GLBL] = { 326e505edaeSJeff LaBundy .base = 0x8A00, 327e505edaeSJeff LaBundy .num_row = 1, 328e505edaeSJeff LaBundy .num_col = 3, 329e505edaeSJeff LaBundy }, 330e505edaeSJeff LaBundy [IQS7222_REG_GRP_BTN] = { 331e505edaeSJeff LaBundy .base = 0x9000, 332e505edaeSJeff LaBundy .num_row = 20, 333e505edaeSJeff LaBundy .num_col = 2, 334e505edaeSJeff LaBundy }, 335e505edaeSJeff LaBundy [IQS7222_REG_GRP_CHAN] = { 336e505edaeSJeff LaBundy .base = 0xB000, 337e505edaeSJeff LaBundy .num_row = 20, 338e505edaeSJeff LaBundy .num_col = 4, 339e505edaeSJeff LaBundy }, 340e505edaeSJeff LaBundy [IQS7222_REG_GRP_FILT] = { 341e505edaeSJeff LaBundy .base = 0xC400, 342e505edaeSJeff LaBundy .num_row = 1, 343e505edaeSJeff LaBundy .num_col = 2, 344e505edaeSJeff LaBundy }, 345e505edaeSJeff LaBundy [IQS7222_REG_GRP_SYS] = { 346e505edaeSJeff LaBundy .base = IQS7222_SYS_SETUP, 347e505edaeSJeff LaBundy .num_row = 1, 348e505edaeSJeff LaBundy .num_col = 10, 349e505edaeSJeff LaBundy }, 350e505edaeSJeff LaBundy }, 351e505edaeSJeff LaBundy }, 352e505edaeSJeff LaBundy { 353e505edaeSJeff LaBundy .prod_num = IQS7222_PROD_NUM_C, 354e505edaeSJeff LaBundy .fw_major = 2, 355e505edaeSJeff LaBundy .fw_minor = 6, 356e505edaeSJeff LaBundy .sldr_res = U16_MAX, 357e505edaeSJeff LaBundy .touch_link = 1686, 358e505edaeSJeff LaBundy .wheel_enable = BIT(3), 359e505edaeSJeff LaBundy .event_offset = 9, 360e505edaeSJeff LaBundy .comms_offset = 10, 361e505edaeSJeff LaBundy .reg_grps = { 362e505edaeSJeff LaBundy [IQS7222_REG_GRP_STAT] = { 363e505edaeSJeff LaBundy .base = IQS7222_SYS_STATUS, 364e505edaeSJeff LaBundy .num_row = 1, 365e505edaeSJeff LaBundy .num_col = 6, 366e505edaeSJeff LaBundy }, 367e505edaeSJeff LaBundy [IQS7222_REG_GRP_CYCLE] = { 368e505edaeSJeff LaBundy .base = 0x8000, 369e505edaeSJeff LaBundy .num_row = 5, 370e505edaeSJeff LaBundy .num_col = 3, 371e505edaeSJeff LaBundy }, 372e505edaeSJeff LaBundy [IQS7222_REG_GRP_GLBL] = { 373e505edaeSJeff LaBundy .base = 0x8500, 374e505edaeSJeff LaBundy .num_row = 1, 375e505edaeSJeff LaBundy .num_col = 3, 376e505edaeSJeff LaBundy }, 377e505edaeSJeff LaBundy [IQS7222_REG_GRP_BTN] = { 378e505edaeSJeff LaBundy .base = 0x9000, 379e505edaeSJeff LaBundy .num_row = 10, 380e505edaeSJeff LaBundy .num_col = 3, 381e505edaeSJeff LaBundy }, 382e505edaeSJeff LaBundy [IQS7222_REG_GRP_CHAN] = { 383e505edaeSJeff LaBundy .base = 0xA000, 384e505edaeSJeff LaBundy .num_row = 10, 385e505edaeSJeff LaBundy .num_col = 6, 386e505edaeSJeff LaBundy }, 387e505edaeSJeff LaBundy [IQS7222_REG_GRP_FILT] = { 388e505edaeSJeff LaBundy .base = 0xAA00, 389e505edaeSJeff LaBundy .num_row = 1, 390e505edaeSJeff LaBundy .num_col = 2, 391e505edaeSJeff LaBundy }, 392e505edaeSJeff LaBundy [IQS7222_REG_GRP_SLDR] = { 393e505edaeSJeff LaBundy .base = 0xB000, 394e505edaeSJeff LaBundy .num_row = 2, 395e505edaeSJeff LaBundy .num_col = 10, 396e505edaeSJeff LaBundy }, 397e505edaeSJeff LaBundy [IQS7222_REG_GRP_GPIO] = { 398e505edaeSJeff LaBundy .base = 0xC000, 399e505edaeSJeff LaBundy .num_row = 3, 400e505edaeSJeff LaBundy .num_col = 3, 401e505edaeSJeff LaBundy }, 402e505edaeSJeff LaBundy [IQS7222_REG_GRP_SYS] = { 403e505edaeSJeff LaBundy .base = IQS7222_SYS_SETUP, 404e505edaeSJeff LaBundy .num_row = 1, 405e505edaeSJeff LaBundy .num_col = 12, 406e505edaeSJeff LaBundy }, 407e505edaeSJeff LaBundy }, 408e505edaeSJeff LaBundy }, 409e505edaeSJeff LaBundy { 410e505edaeSJeff LaBundy .prod_num = IQS7222_PROD_NUM_C, 411e505edaeSJeff LaBundy .fw_major = 1, 412e505edaeSJeff LaBundy .fw_minor = 13, 413e505edaeSJeff LaBundy .sldr_res = U16_MAX, 414e505edaeSJeff LaBundy .touch_link = 1674, 415e505edaeSJeff LaBundy .wheel_enable = BIT(3), 416e505edaeSJeff LaBundy .event_offset = 9, 417e505edaeSJeff LaBundy .comms_offset = 10, 418e505edaeSJeff LaBundy .reg_grps = { 419e505edaeSJeff LaBundy [IQS7222_REG_GRP_STAT] = { 420e505edaeSJeff LaBundy .base = IQS7222_SYS_STATUS, 421e505edaeSJeff LaBundy .num_row = 1, 422e505edaeSJeff LaBundy .num_col = 6, 423e505edaeSJeff LaBundy }, 424e505edaeSJeff LaBundy [IQS7222_REG_GRP_CYCLE] = { 425e505edaeSJeff LaBundy .base = 0x8000, 426e505edaeSJeff LaBundy .num_row = 5, 427e505edaeSJeff LaBundy .num_col = 3, 428e505edaeSJeff LaBundy }, 429e505edaeSJeff LaBundy [IQS7222_REG_GRP_GLBL] = { 430e505edaeSJeff LaBundy .base = 0x8500, 431e505edaeSJeff LaBundy .num_row = 1, 432e505edaeSJeff LaBundy .num_col = 3, 433e505edaeSJeff LaBundy }, 434e505edaeSJeff LaBundy [IQS7222_REG_GRP_BTN] = { 435e505edaeSJeff LaBundy .base = 0x9000, 436e505edaeSJeff LaBundy .num_row = 10, 437e505edaeSJeff LaBundy .num_col = 3, 438e505edaeSJeff LaBundy }, 439e505edaeSJeff LaBundy [IQS7222_REG_GRP_CHAN] = { 440e505edaeSJeff LaBundy .base = 0xA000, 441e505edaeSJeff LaBundy .num_row = 10, 442e505edaeSJeff LaBundy .num_col = 6, 443e505edaeSJeff LaBundy }, 444e505edaeSJeff LaBundy [IQS7222_REG_GRP_FILT] = { 445e505edaeSJeff LaBundy .base = 0xAA00, 446e505edaeSJeff LaBundy .num_row = 1, 447e505edaeSJeff LaBundy .num_col = 2, 448e505edaeSJeff LaBundy }, 449e505edaeSJeff LaBundy [IQS7222_REG_GRP_SLDR] = { 450e505edaeSJeff LaBundy .base = 0xB000, 451e505edaeSJeff LaBundy .num_row = 2, 452e505edaeSJeff LaBundy .num_col = 10, 453e505edaeSJeff LaBundy }, 454e505edaeSJeff LaBundy [IQS7222_REG_GRP_GPIO] = { 455e505edaeSJeff LaBundy .base = 0xC000, 456e505edaeSJeff LaBundy .num_row = 1, 457e505edaeSJeff LaBundy .num_col = 3, 458e505edaeSJeff LaBundy }, 459e505edaeSJeff LaBundy [IQS7222_REG_GRP_SYS] = { 460e505edaeSJeff LaBundy .base = IQS7222_SYS_SETUP, 461e505edaeSJeff LaBundy .num_row = 1, 462e505edaeSJeff LaBundy .num_col = 11, 463e505edaeSJeff LaBundy }, 464e505edaeSJeff LaBundy }, 465e505edaeSJeff LaBundy }, 466e505edaeSJeff LaBundy }; 467e505edaeSJeff LaBundy 468e505edaeSJeff LaBundy struct iqs7222_prop_desc { 469e505edaeSJeff LaBundy const char *name; 470e505edaeSJeff LaBundy enum iqs7222_reg_grp_id reg_grp; 471e505edaeSJeff LaBundy enum iqs7222_reg_key_id reg_key; 472e505edaeSJeff LaBundy int reg_offset; 473e505edaeSJeff LaBundy int reg_shift; 474e505edaeSJeff LaBundy int reg_width; 475e505edaeSJeff LaBundy int val_pitch; 476e505edaeSJeff LaBundy int val_min; 477e505edaeSJeff LaBundy int val_max; 478e505edaeSJeff LaBundy bool invert; 479e505edaeSJeff LaBundy const char *label; 480e505edaeSJeff LaBundy }; 481e505edaeSJeff LaBundy 482e505edaeSJeff LaBundy static const struct iqs7222_prop_desc iqs7222_props[] = { 483e505edaeSJeff LaBundy { 484e505edaeSJeff LaBundy .name = "azoteq,conv-period", 485e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CYCLE, 486e505edaeSJeff LaBundy .reg_offset = 0, 487e505edaeSJeff LaBundy .reg_shift = 8, 488e505edaeSJeff LaBundy .reg_width = 8, 489e505edaeSJeff LaBundy .label = "conversion period", 490e505edaeSJeff LaBundy }, 491e505edaeSJeff LaBundy { 492e505edaeSJeff LaBundy .name = "azoteq,conv-frac", 493e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CYCLE, 494e505edaeSJeff LaBundy .reg_offset = 0, 495e505edaeSJeff LaBundy .reg_shift = 0, 496e505edaeSJeff LaBundy .reg_width = 8, 497e505edaeSJeff LaBundy .label = "conversion frequency fractional divider", 498e505edaeSJeff LaBundy }, 499e505edaeSJeff LaBundy { 500e505edaeSJeff LaBundy .name = "azoteq,rx-float-inactive", 501e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CYCLE, 502e505edaeSJeff LaBundy .reg_offset = 1, 503e505edaeSJeff LaBundy .reg_shift = 6, 504e505edaeSJeff LaBundy .reg_width = 1, 505e505edaeSJeff LaBundy .invert = true, 506e505edaeSJeff LaBundy }, 507e505edaeSJeff LaBundy { 508e505edaeSJeff LaBundy .name = "azoteq,dead-time-enable", 509e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CYCLE, 510e505edaeSJeff LaBundy .reg_offset = 1, 511e505edaeSJeff LaBundy .reg_shift = 5, 512e505edaeSJeff LaBundy .reg_width = 1, 513e505edaeSJeff LaBundy }, 514e505edaeSJeff LaBundy { 515e505edaeSJeff LaBundy .name = "azoteq,tx-freq-fosc", 516e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CYCLE, 517e505edaeSJeff LaBundy .reg_offset = 1, 518e505edaeSJeff LaBundy .reg_shift = 4, 519e505edaeSJeff LaBundy .reg_width = 1, 520e505edaeSJeff LaBundy }, 521e505edaeSJeff LaBundy { 522e505edaeSJeff LaBundy .name = "azoteq,vbias-enable", 523e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CYCLE, 524e505edaeSJeff LaBundy .reg_offset = 1, 525e505edaeSJeff LaBundy .reg_shift = 3, 526e505edaeSJeff LaBundy .reg_width = 1, 527e505edaeSJeff LaBundy }, 528e505edaeSJeff LaBundy { 529e505edaeSJeff LaBundy .name = "azoteq,sense-mode", 530e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CYCLE, 531e505edaeSJeff LaBundy .reg_offset = 1, 532e505edaeSJeff LaBundy .reg_shift = 0, 533e505edaeSJeff LaBundy .reg_width = 3, 534e505edaeSJeff LaBundy .val_max = 3, 535e505edaeSJeff LaBundy .label = "sensing mode", 536e505edaeSJeff LaBundy }, 537e505edaeSJeff LaBundy { 538e505edaeSJeff LaBundy .name = "azoteq,iref-enable", 539e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CYCLE, 540e505edaeSJeff LaBundy .reg_offset = 2, 541e505edaeSJeff LaBundy .reg_shift = 10, 542e505edaeSJeff LaBundy .reg_width = 1, 543e505edaeSJeff LaBundy }, 544e505edaeSJeff LaBundy { 545e505edaeSJeff LaBundy .name = "azoteq,iref-level", 546e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CYCLE, 547e505edaeSJeff LaBundy .reg_offset = 2, 548e505edaeSJeff LaBundy .reg_shift = 4, 549e505edaeSJeff LaBundy .reg_width = 4, 550e505edaeSJeff LaBundy .label = "current reference level", 551e505edaeSJeff LaBundy }, 552e505edaeSJeff LaBundy { 553e505edaeSJeff LaBundy .name = "azoteq,iref-trim", 554e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CYCLE, 555e505edaeSJeff LaBundy .reg_offset = 2, 556e505edaeSJeff LaBundy .reg_shift = 0, 557e505edaeSJeff LaBundy .reg_width = 4, 558e505edaeSJeff LaBundy .label = "current reference trim", 559e505edaeSJeff LaBundy }, 560e505edaeSJeff LaBundy { 561e505edaeSJeff LaBundy .name = "azoteq,max-counts", 562e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_GLBL, 563e505edaeSJeff LaBundy .reg_offset = 0, 564e505edaeSJeff LaBundy .reg_shift = 13, 565e505edaeSJeff LaBundy .reg_width = 2, 566e505edaeSJeff LaBundy .label = "maximum counts", 567e505edaeSJeff LaBundy }, 568e505edaeSJeff LaBundy { 569e505edaeSJeff LaBundy .name = "azoteq,auto-mode", 570e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_GLBL, 571e505edaeSJeff LaBundy .reg_offset = 0, 572e505edaeSJeff LaBundy .reg_shift = 2, 573e505edaeSJeff LaBundy .reg_width = 2, 574e505edaeSJeff LaBundy .label = "number of conversions", 575e505edaeSJeff LaBundy }, 576e505edaeSJeff LaBundy { 577e505edaeSJeff LaBundy .name = "azoteq,ati-frac-div-fine", 578e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_GLBL, 579e505edaeSJeff LaBundy .reg_offset = 1, 580e505edaeSJeff LaBundy .reg_shift = 9, 581e505edaeSJeff LaBundy .reg_width = 5, 582e505edaeSJeff LaBundy .label = "ATI fine fractional divider", 583e505edaeSJeff LaBundy }, 584e505edaeSJeff LaBundy { 585e505edaeSJeff LaBundy .name = "azoteq,ati-frac-div-coarse", 586e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_GLBL, 587e505edaeSJeff LaBundy .reg_offset = 1, 588e505edaeSJeff LaBundy .reg_shift = 0, 589e505edaeSJeff LaBundy .reg_width = 5, 590e505edaeSJeff LaBundy .label = "ATI coarse fractional divider", 591e505edaeSJeff LaBundy }, 592e505edaeSJeff LaBundy { 593e505edaeSJeff LaBundy .name = "azoteq,ati-comp-select", 594e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_GLBL, 595e505edaeSJeff LaBundy .reg_offset = 2, 596e505edaeSJeff LaBundy .reg_shift = 0, 597e505edaeSJeff LaBundy .reg_width = 10, 598e505edaeSJeff LaBundy .label = "ATI compensation selection", 599e505edaeSJeff LaBundy }, 600e505edaeSJeff LaBundy { 601e505edaeSJeff LaBundy .name = "azoteq,ati-band", 602e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CHAN, 603e505edaeSJeff LaBundy .reg_offset = 0, 604e505edaeSJeff LaBundy .reg_shift = 12, 605e505edaeSJeff LaBundy .reg_width = 2, 606e505edaeSJeff LaBundy .label = "ATI band", 607e505edaeSJeff LaBundy }, 608e505edaeSJeff LaBundy { 609e505edaeSJeff LaBundy .name = "azoteq,global-halt", 610e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CHAN, 611e505edaeSJeff LaBundy .reg_offset = 0, 612e505edaeSJeff LaBundy .reg_shift = 11, 613e505edaeSJeff LaBundy .reg_width = 1, 614e505edaeSJeff LaBundy }, 615e505edaeSJeff LaBundy { 616e505edaeSJeff LaBundy .name = "azoteq,invert-enable", 617e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CHAN, 618e505edaeSJeff LaBundy .reg_offset = 0, 619e505edaeSJeff LaBundy .reg_shift = 10, 620e505edaeSJeff LaBundy .reg_width = 1, 621e505edaeSJeff LaBundy }, 622e505edaeSJeff LaBundy { 623e505edaeSJeff LaBundy .name = "azoteq,dual-direction", 624e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CHAN, 625e505edaeSJeff LaBundy .reg_offset = 0, 626e505edaeSJeff LaBundy .reg_shift = 9, 627e505edaeSJeff LaBundy .reg_width = 1, 628e505edaeSJeff LaBundy }, 629e505edaeSJeff LaBundy { 630e505edaeSJeff LaBundy .name = "azoteq,samp-cap-double", 631e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CHAN, 632e505edaeSJeff LaBundy .reg_offset = 0, 633e505edaeSJeff LaBundy .reg_shift = 3, 634e505edaeSJeff LaBundy .reg_width = 1, 635e505edaeSJeff LaBundy }, 636e505edaeSJeff LaBundy { 637e505edaeSJeff LaBundy .name = "azoteq,vref-half", 638e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CHAN, 639e505edaeSJeff LaBundy .reg_offset = 0, 640e505edaeSJeff LaBundy .reg_shift = 2, 641e505edaeSJeff LaBundy .reg_width = 1, 642e505edaeSJeff LaBundy }, 643e505edaeSJeff LaBundy { 644e505edaeSJeff LaBundy .name = "azoteq,proj-bias", 645e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CHAN, 646e505edaeSJeff LaBundy .reg_offset = 0, 647e505edaeSJeff LaBundy .reg_shift = 0, 648e505edaeSJeff LaBundy .reg_width = 2, 649e505edaeSJeff LaBundy .label = "projected bias current", 650e505edaeSJeff LaBundy }, 651e505edaeSJeff LaBundy { 652e505edaeSJeff LaBundy .name = "azoteq,ati-target", 653e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CHAN, 654e505edaeSJeff LaBundy .reg_offset = 1, 655e505edaeSJeff LaBundy .reg_shift = 8, 656e505edaeSJeff LaBundy .reg_width = 8, 657e505edaeSJeff LaBundy .val_pitch = 8, 658e505edaeSJeff LaBundy .label = "ATI target", 659e505edaeSJeff LaBundy }, 660e505edaeSJeff LaBundy { 661e505edaeSJeff LaBundy .name = "azoteq,ati-base", 662e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CHAN, 663e505edaeSJeff LaBundy .reg_offset = 1, 664e505edaeSJeff LaBundy .reg_shift = 3, 665e505edaeSJeff LaBundy .reg_width = 5, 666e505edaeSJeff LaBundy .val_pitch = 16, 667e505edaeSJeff LaBundy .label = "ATI base", 668e505edaeSJeff LaBundy }, 669e505edaeSJeff LaBundy { 670e505edaeSJeff LaBundy .name = "azoteq,ati-mode", 671e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CHAN, 672e505edaeSJeff LaBundy .reg_offset = 1, 673e505edaeSJeff LaBundy .reg_shift = 0, 674e505edaeSJeff LaBundy .reg_width = 3, 675e505edaeSJeff LaBundy .val_max = 5, 676e505edaeSJeff LaBundy .label = "ATI mode", 677e505edaeSJeff LaBundy }, 678e505edaeSJeff LaBundy { 679e505edaeSJeff LaBundy .name = "azoteq,ati-frac-div-fine", 680e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CHAN, 681e505edaeSJeff LaBundy .reg_offset = 2, 682e505edaeSJeff LaBundy .reg_shift = 9, 683e505edaeSJeff LaBundy .reg_width = 5, 684e505edaeSJeff LaBundy .label = "ATI fine fractional divider", 685e505edaeSJeff LaBundy }, 686e505edaeSJeff LaBundy { 687e505edaeSJeff LaBundy .name = "azoteq,ati-frac-mult-coarse", 688e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CHAN, 689e505edaeSJeff LaBundy .reg_offset = 2, 690e505edaeSJeff LaBundy .reg_shift = 5, 691e505edaeSJeff LaBundy .reg_width = 4, 692e505edaeSJeff LaBundy .label = "ATI coarse fractional multiplier", 693e505edaeSJeff LaBundy }, 694e505edaeSJeff LaBundy { 695e505edaeSJeff LaBundy .name = "azoteq,ati-frac-div-coarse", 696e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CHAN, 697e505edaeSJeff LaBundy .reg_offset = 2, 698e505edaeSJeff LaBundy .reg_shift = 0, 699e505edaeSJeff LaBundy .reg_width = 5, 700e505edaeSJeff LaBundy .label = "ATI coarse fractional divider", 701e505edaeSJeff LaBundy }, 702e505edaeSJeff LaBundy { 703e505edaeSJeff LaBundy .name = "azoteq,ati-comp-div", 704e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CHAN, 705e505edaeSJeff LaBundy .reg_offset = 3, 706e505edaeSJeff LaBundy .reg_shift = 11, 707e505edaeSJeff LaBundy .reg_width = 5, 708e505edaeSJeff LaBundy .label = "ATI compensation divider", 709e505edaeSJeff LaBundy }, 710e505edaeSJeff LaBundy { 711e505edaeSJeff LaBundy .name = "azoteq,ati-comp-select", 712e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_CHAN, 713e505edaeSJeff LaBundy .reg_offset = 3, 714e505edaeSJeff LaBundy .reg_shift = 0, 715e505edaeSJeff LaBundy .reg_width = 10, 716e505edaeSJeff LaBundy .label = "ATI compensation selection", 717e505edaeSJeff LaBundy }, 718e505edaeSJeff LaBundy { 719e505edaeSJeff LaBundy .name = "azoteq,debounce-exit", 720e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_BTN, 721e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_DEBOUNCE, 722e505edaeSJeff LaBundy .reg_offset = 0, 723e505edaeSJeff LaBundy .reg_shift = 12, 724e505edaeSJeff LaBundy .reg_width = 4, 725e505edaeSJeff LaBundy .label = "debounce exit factor", 726e505edaeSJeff LaBundy }, 727e505edaeSJeff LaBundy { 728e505edaeSJeff LaBundy .name = "azoteq,debounce-enter", 729e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_BTN, 730e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_DEBOUNCE, 731e505edaeSJeff LaBundy .reg_offset = 0, 732e505edaeSJeff LaBundy .reg_shift = 8, 733e505edaeSJeff LaBundy .reg_width = 4, 734e505edaeSJeff LaBundy .label = "debounce entrance factor", 735e505edaeSJeff LaBundy }, 736e505edaeSJeff LaBundy { 737e505edaeSJeff LaBundy .name = "azoteq,thresh", 738e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_BTN, 739e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_PROX, 740e505edaeSJeff LaBundy .reg_offset = 0, 741e505edaeSJeff LaBundy .reg_shift = 0, 742e505edaeSJeff LaBundy .reg_width = 8, 743e505edaeSJeff LaBundy .val_max = 127, 744e505edaeSJeff LaBundy .label = "threshold", 745e505edaeSJeff LaBundy }, 746e505edaeSJeff LaBundy { 747e505edaeSJeff LaBundy .name = "azoteq,thresh", 748e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_BTN, 749e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_TOUCH, 750e505edaeSJeff LaBundy .reg_offset = 1, 751e505edaeSJeff LaBundy .reg_shift = 0, 752e505edaeSJeff LaBundy .reg_width = 8, 753e505edaeSJeff LaBundy .label = "threshold", 754e505edaeSJeff LaBundy }, 755e505edaeSJeff LaBundy { 756e505edaeSJeff LaBundy .name = "azoteq,hyst", 757e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_BTN, 758e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_TOUCH, 759e505edaeSJeff LaBundy .reg_offset = 1, 760e505edaeSJeff LaBundy .reg_shift = 8, 761e505edaeSJeff LaBundy .reg_width = 8, 762e505edaeSJeff LaBundy .label = "hysteresis", 763e505edaeSJeff LaBundy }, 764e505edaeSJeff LaBundy { 765e505edaeSJeff LaBundy .name = "azoteq,lta-beta-lp", 766e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_FILT, 767e505edaeSJeff LaBundy .reg_offset = 0, 768e505edaeSJeff LaBundy .reg_shift = 12, 769e505edaeSJeff LaBundy .reg_width = 4, 770e505edaeSJeff LaBundy .label = "low-power mode long-term average beta", 771e505edaeSJeff LaBundy }, 772e505edaeSJeff LaBundy { 773e505edaeSJeff LaBundy .name = "azoteq,lta-beta-np", 774e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_FILT, 775e505edaeSJeff LaBundy .reg_offset = 0, 776e505edaeSJeff LaBundy .reg_shift = 8, 777e505edaeSJeff LaBundy .reg_width = 4, 778e505edaeSJeff LaBundy .label = "normal-power mode long-term average beta", 779e505edaeSJeff LaBundy }, 780e505edaeSJeff LaBundy { 781e505edaeSJeff LaBundy .name = "azoteq,counts-beta-lp", 782e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_FILT, 783e505edaeSJeff LaBundy .reg_offset = 0, 784e505edaeSJeff LaBundy .reg_shift = 4, 785e505edaeSJeff LaBundy .reg_width = 4, 786e505edaeSJeff LaBundy .label = "low-power mode counts beta", 787e505edaeSJeff LaBundy }, 788e505edaeSJeff LaBundy { 789e505edaeSJeff LaBundy .name = "azoteq,counts-beta-np", 790e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_FILT, 791e505edaeSJeff LaBundy .reg_offset = 0, 792e505edaeSJeff LaBundy .reg_shift = 0, 793e505edaeSJeff LaBundy .reg_width = 4, 794e505edaeSJeff LaBundy .label = "normal-power mode counts beta", 795e505edaeSJeff LaBundy }, 796e505edaeSJeff LaBundy { 797e505edaeSJeff LaBundy .name = "azoteq,lta-fast-beta-lp", 798e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_FILT, 799e505edaeSJeff LaBundy .reg_offset = 1, 800e505edaeSJeff LaBundy .reg_shift = 4, 801e505edaeSJeff LaBundy .reg_width = 4, 802e505edaeSJeff LaBundy .label = "low-power mode long-term average fast beta", 803e505edaeSJeff LaBundy }, 804e505edaeSJeff LaBundy { 805e505edaeSJeff LaBundy .name = "azoteq,lta-fast-beta-np", 806e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_FILT, 807e505edaeSJeff LaBundy .reg_offset = 1, 808e505edaeSJeff LaBundy .reg_shift = 0, 809e505edaeSJeff LaBundy .reg_width = 4, 810e505edaeSJeff LaBundy .label = "normal-power mode long-term average fast beta", 811e505edaeSJeff LaBundy }, 812e505edaeSJeff LaBundy { 813e505edaeSJeff LaBundy .name = "azoteq,lower-cal", 814e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SLDR, 815e505edaeSJeff LaBundy .reg_offset = 0, 816e505edaeSJeff LaBundy .reg_shift = 8, 817e505edaeSJeff LaBundy .reg_width = 8, 818e505edaeSJeff LaBundy .label = "lower calibration", 819e505edaeSJeff LaBundy }, 820e505edaeSJeff LaBundy { 821e505edaeSJeff LaBundy .name = "azoteq,static-beta", 822e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SLDR, 823e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_NO_WHEEL, 824e505edaeSJeff LaBundy .reg_offset = 0, 825e505edaeSJeff LaBundy .reg_shift = 6, 826e505edaeSJeff LaBundy .reg_width = 1, 827e505edaeSJeff LaBundy }, 828e505edaeSJeff LaBundy { 829e505edaeSJeff LaBundy .name = "azoteq,bottom-beta", 830e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SLDR, 831e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_NO_WHEEL, 832e505edaeSJeff LaBundy .reg_offset = 0, 833e505edaeSJeff LaBundy .reg_shift = 3, 834e505edaeSJeff LaBundy .reg_width = 3, 835e505edaeSJeff LaBundy .label = "bottom beta", 836e505edaeSJeff LaBundy }, 837e505edaeSJeff LaBundy { 838e505edaeSJeff LaBundy .name = "azoteq,static-beta", 839e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SLDR, 840e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_WHEEL, 841e505edaeSJeff LaBundy .reg_offset = 0, 842e505edaeSJeff LaBundy .reg_shift = 7, 843e505edaeSJeff LaBundy .reg_width = 1, 844e505edaeSJeff LaBundy }, 845e505edaeSJeff LaBundy { 846e505edaeSJeff LaBundy .name = "azoteq,bottom-beta", 847e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SLDR, 848e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_WHEEL, 849e505edaeSJeff LaBundy .reg_offset = 0, 850e505edaeSJeff LaBundy .reg_shift = 4, 851e505edaeSJeff LaBundy .reg_width = 3, 852e505edaeSJeff LaBundy .label = "bottom beta", 853e505edaeSJeff LaBundy }, 854e505edaeSJeff LaBundy { 855e505edaeSJeff LaBundy .name = "azoteq,bottom-speed", 856e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SLDR, 857e505edaeSJeff LaBundy .reg_offset = 1, 858e505edaeSJeff LaBundy .reg_shift = 8, 859e505edaeSJeff LaBundy .reg_width = 8, 860e505edaeSJeff LaBundy .label = "bottom speed", 861e505edaeSJeff LaBundy }, 862e505edaeSJeff LaBundy { 863e505edaeSJeff LaBundy .name = "azoteq,upper-cal", 864e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SLDR, 865e505edaeSJeff LaBundy .reg_offset = 1, 866e505edaeSJeff LaBundy .reg_shift = 0, 867e505edaeSJeff LaBundy .reg_width = 8, 868e505edaeSJeff LaBundy .label = "upper calibration", 869e505edaeSJeff LaBundy }, 870e505edaeSJeff LaBundy { 871e505edaeSJeff LaBundy .name = "azoteq,gesture-max-ms", 872e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SLDR, 873e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_TAP, 874e505edaeSJeff LaBundy .reg_offset = 9, 875e505edaeSJeff LaBundy .reg_shift = 8, 876e505edaeSJeff LaBundy .reg_width = 8, 877e505edaeSJeff LaBundy .val_pitch = 4, 878e505edaeSJeff LaBundy .label = "maximum gesture time", 879e505edaeSJeff LaBundy }, 880e505edaeSJeff LaBundy { 881e505edaeSJeff LaBundy .name = "azoteq,gesture-min-ms", 882e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SLDR, 883e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_TAP, 884e505edaeSJeff LaBundy .reg_offset = 9, 885e505edaeSJeff LaBundy .reg_shift = 3, 886e505edaeSJeff LaBundy .reg_width = 5, 887e505edaeSJeff LaBundy .val_pitch = 4, 888e505edaeSJeff LaBundy .label = "minimum gesture time", 889e505edaeSJeff LaBundy }, 890e505edaeSJeff LaBundy { 891e505edaeSJeff LaBundy .name = "azoteq,gesture-dist", 892e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SLDR, 893e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_AXIAL, 894e505edaeSJeff LaBundy .reg_offset = 10, 895e505edaeSJeff LaBundy .reg_shift = 8, 896e505edaeSJeff LaBundy .reg_width = 8, 897e505edaeSJeff LaBundy .val_pitch = 16, 898e505edaeSJeff LaBundy .label = "gesture distance", 899e505edaeSJeff LaBundy }, 900e505edaeSJeff LaBundy { 901e505edaeSJeff LaBundy .name = "azoteq,gesture-max-ms", 902e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SLDR, 903e505edaeSJeff LaBundy .reg_key = IQS7222_REG_KEY_AXIAL, 904e505edaeSJeff LaBundy .reg_offset = 10, 905e505edaeSJeff LaBundy .reg_shift = 0, 906e505edaeSJeff LaBundy .reg_width = 8, 907e505edaeSJeff LaBundy .val_pitch = 4, 908e505edaeSJeff LaBundy .label = "maximum gesture time", 909e505edaeSJeff LaBundy }, 910e505edaeSJeff LaBundy { 911e505edaeSJeff LaBundy .name = "drive-open-drain", 912e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_GPIO, 913e505edaeSJeff LaBundy .reg_offset = 0, 914e505edaeSJeff LaBundy .reg_shift = 1, 915e505edaeSJeff LaBundy .reg_width = 1, 916e505edaeSJeff LaBundy }, 917e505edaeSJeff LaBundy { 918e505edaeSJeff LaBundy .name = "azoteq,timeout-ati-ms", 919e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SYS, 920e505edaeSJeff LaBundy .reg_offset = 1, 921e505edaeSJeff LaBundy .reg_shift = 0, 922e505edaeSJeff LaBundy .reg_width = 16, 923e505edaeSJeff LaBundy .val_pitch = 500, 924e505edaeSJeff LaBundy .label = "ATI error timeout", 925e505edaeSJeff LaBundy }, 926e505edaeSJeff LaBundy { 927e505edaeSJeff LaBundy .name = "azoteq,rate-ati-ms", 928e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SYS, 929e505edaeSJeff LaBundy .reg_offset = 2, 930e505edaeSJeff LaBundy .reg_shift = 0, 931e505edaeSJeff LaBundy .reg_width = 16, 932e505edaeSJeff LaBundy .label = "ATI report rate", 933e505edaeSJeff LaBundy }, 934e505edaeSJeff LaBundy { 935e505edaeSJeff LaBundy .name = "azoteq,timeout-np-ms", 936e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SYS, 937e505edaeSJeff LaBundy .reg_offset = 3, 938e505edaeSJeff LaBundy .reg_shift = 0, 939e505edaeSJeff LaBundy .reg_width = 16, 940e505edaeSJeff LaBundy .label = "normal-power mode timeout", 941e505edaeSJeff LaBundy }, 942e505edaeSJeff LaBundy { 943e505edaeSJeff LaBundy .name = "azoteq,rate-np-ms", 944e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SYS, 945e505edaeSJeff LaBundy .reg_offset = 4, 946e505edaeSJeff LaBundy .reg_shift = 0, 947e505edaeSJeff LaBundy .reg_width = 16, 948e505edaeSJeff LaBundy .val_max = 3000, 949e505edaeSJeff LaBundy .label = "normal-power mode report rate", 950e505edaeSJeff LaBundy }, 951e505edaeSJeff LaBundy { 952e505edaeSJeff LaBundy .name = "azoteq,timeout-lp-ms", 953e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SYS, 954e505edaeSJeff LaBundy .reg_offset = 5, 955e505edaeSJeff LaBundy .reg_shift = 0, 956e505edaeSJeff LaBundy .reg_width = 16, 957e505edaeSJeff LaBundy .label = "low-power mode timeout", 958e505edaeSJeff LaBundy }, 959e505edaeSJeff LaBundy { 960e505edaeSJeff LaBundy .name = "azoteq,rate-lp-ms", 961e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SYS, 962e505edaeSJeff LaBundy .reg_offset = 6, 963e505edaeSJeff LaBundy .reg_shift = 0, 964e505edaeSJeff LaBundy .reg_width = 16, 965e505edaeSJeff LaBundy .val_max = 3000, 966e505edaeSJeff LaBundy .label = "low-power mode report rate", 967e505edaeSJeff LaBundy }, 968e505edaeSJeff LaBundy { 969e505edaeSJeff LaBundy .name = "azoteq,timeout-ulp-ms", 970e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SYS, 971e505edaeSJeff LaBundy .reg_offset = 7, 972e505edaeSJeff LaBundy .reg_shift = 0, 973e505edaeSJeff LaBundy .reg_width = 16, 974e505edaeSJeff LaBundy .label = "ultra-low-power mode timeout", 975e505edaeSJeff LaBundy }, 976e505edaeSJeff LaBundy { 977e505edaeSJeff LaBundy .name = "azoteq,rate-ulp-ms", 978e505edaeSJeff LaBundy .reg_grp = IQS7222_REG_GRP_SYS, 979e505edaeSJeff LaBundy .reg_offset = 8, 980e505edaeSJeff LaBundy .reg_shift = 0, 981e505edaeSJeff LaBundy .reg_width = 16, 982e505edaeSJeff LaBundy .val_max = 3000, 983e505edaeSJeff LaBundy .label = "ultra-low-power mode report rate", 984e505edaeSJeff LaBundy }, 985e505edaeSJeff LaBundy }; 986e505edaeSJeff LaBundy 987e505edaeSJeff LaBundy struct iqs7222_private { 988e505edaeSJeff LaBundy const struct iqs7222_dev_desc *dev_desc; 989e505edaeSJeff LaBundy struct gpio_desc *reset_gpio; 990e505edaeSJeff LaBundy struct gpio_desc *irq_gpio; 991e505edaeSJeff LaBundy struct i2c_client *client; 992e505edaeSJeff LaBundy struct input_dev *keypad; 993e505edaeSJeff LaBundy unsigned int kp_type[IQS7222_MAX_CHAN][ARRAY_SIZE(iqs7222_kp_events)]; 994e505edaeSJeff LaBundy unsigned int kp_code[IQS7222_MAX_CHAN][ARRAY_SIZE(iqs7222_kp_events)]; 995e505edaeSJeff LaBundy unsigned int sl_code[IQS7222_MAX_SLDR][ARRAY_SIZE(iqs7222_sl_events)]; 996e505edaeSJeff LaBundy unsigned int sl_axis[IQS7222_MAX_SLDR]; 997e505edaeSJeff LaBundy u16 cycle_setup[IQS7222_MAX_CHAN / 2][IQS7222_MAX_COLS_CYCLE]; 998e505edaeSJeff LaBundy u16 glbl_setup[IQS7222_MAX_COLS_GLBL]; 999e505edaeSJeff LaBundy u16 btn_setup[IQS7222_MAX_CHAN][IQS7222_MAX_COLS_BTN]; 1000e505edaeSJeff LaBundy u16 chan_setup[IQS7222_MAX_CHAN][IQS7222_MAX_COLS_CHAN]; 1001e505edaeSJeff LaBundy u16 filt_setup[IQS7222_MAX_COLS_FILT]; 1002e505edaeSJeff LaBundy u16 sldr_setup[IQS7222_MAX_SLDR][IQS7222_MAX_COLS_SLDR]; 1003e505edaeSJeff LaBundy u16 gpio_setup[ARRAY_SIZE(iqs7222_gpio_links)][IQS7222_MAX_COLS_GPIO]; 1004e505edaeSJeff LaBundy u16 sys_setup[IQS7222_MAX_COLS_SYS]; 1005e505edaeSJeff LaBundy }; 1006e505edaeSJeff LaBundy 1007e505edaeSJeff LaBundy static u16 *iqs7222_setup(struct iqs7222_private *iqs7222, 1008e505edaeSJeff LaBundy enum iqs7222_reg_grp_id reg_grp, int row) 1009e505edaeSJeff LaBundy { 1010e505edaeSJeff LaBundy switch (reg_grp) { 1011e505edaeSJeff LaBundy case IQS7222_REG_GRP_CYCLE: 1012e505edaeSJeff LaBundy return iqs7222->cycle_setup[row]; 1013e505edaeSJeff LaBundy 1014e505edaeSJeff LaBundy case IQS7222_REG_GRP_GLBL: 1015e505edaeSJeff LaBundy return iqs7222->glbl_setup; 1016e505edaeSJeff LaBundy 1017e505edaeSJeff LaBundy case IQS7222_REG_GRP_BTN: 1018e505edaeSJeff LaBundy return iqs7222->btn_setup[row]; 1019e505edaeSJeff LaBundy 1020e505edaeSJeff LaBundy case IQS7222_REG_GRP_CHAN: 1021e505edaeSJeff LaBundy return iqs7222->chan_setup[row]; 1022e505edaeSJeff LaBundy 1023e505edaeSJeff LaBundy case IQS7222_REG_GRP_FILT: 1024e505edaeSJeff LaBundy return iqs7222->filt_setup; 1025e505edaeSJeff LaBundy 1026e505edaeSJeff LaBundy case IQS7222_REG_GRP_SLDR: 1027e505edaeSJeff LaBundy return iqs7222->sldr_setup[row]; 1028e505edaeSJeff LaBundy 1029e505edaeSJeff LaBundy case IQS7222_REG_GRP_GPIO: 1030e505edaeSJeff LaBundy return iqs7222->gpio_setup[row]; 1031e505edaeSJeff LaBundy 1032e505edaeSJeff LaBundy case IQS7222_REG_GRP_SYS: 1033e505edaeSJeff LaBundy return iqs7222->sys_setup; 1034e505edaeSJeff LaBundy 1035e505edaeSJeff LaBundy default: 1036e505edaeSJeff LaBundy return NULL; 1037e505edaeSJeff LaBundy } 1038e505edaeSJeff LaBundy } 1039e505edaeSJeff LaBundy 1040e505edaeSJeff LaBundy static int iqs7222_irq_poll(struct iqs7222_private *iqs7222, u16 timeout_ms) 1041e505edaeSJeff LaBundy { 1042e505edaeSJeff LaBundy ktime_t irq_timeout = ktime_add_ms(ktime_get(), timeout_ms); 1043e505edaeSJeff LaBundy int ret; 1044e505edaeSJeff LaBundy 1045e505edaeSJeff LaBundy do { 1046e505edaeSJeff LaBundy usleep_range(1000, 1100); 1047e505edaeSJeff LaBundy 1048e505edaeSJeff LaBundy ret = gpiod_get_value_cansleep(iqs7222->irq_gpio); 1049e505edaeSJeff LaBundy if (ret < 0) 1050e505edaeSJeff LaBundy return ret; 1051e505edaeSJeff LaBundy else if (ret > 0) 1052e505edaeSJeff LaBundy return 0; 1053e505edaeSJeff LaBundy } while (ktime_compare(ktime_get(), irq_timeout) < 0); 1054e505edaeSJeff LaBundy 1055e505edaeSJeff LaBundy return -EBUSY; 1056e505edaeSJeff LaBundy } 1057e505edaeSJeff LaBundy 1058e505edaeSJeff LaBundy static int iqs7222_hard_reset(struct iqs7222_private *iqs7222) 1059e505edaeSJeff LaBundy { 1060e505edaeSJeff LaBundy struct i2c_client *client = iqs7222->client; 1061e505edaeSJeff LaBundy int error; 1062e505edaeSJeff LaBundy 1063e505edaeSJeff LaBundy if (!iqs7222->reset_gpio) 1064e505edaeSJeff LaBundy return 0; 1065e505edaeSJeff LaBundy 1066e505edaeSJeff LaBundy gpiod_set_value_cansleep(iqs7222->reset_gpio, 1); 1067e505edaeSJeff LaBundy usleep_range(1000, 1100); 1068e505edaeSJeff LaBundy 1069e505edaeSJeff LaBundy gpiod_set_value_cansleep(iqs7222->reset_gpio, 0); 1070e505edaeSJeff LaBundy 1071e505edaeSJeff LaBundy error = iqs7222_irq_poll(iqs7222, IQS7222_RESET_TIMEOUT_MS); 1072e505edaeSJeff LaBundy if (error) 1073e505edaeSJeff LaBundy dev_err(&client->dev, "Failed to reset device: %d\n", error); 1074e505edaeSJeff LaBundy 1075e505edaeSJeff LaBundy return error; 1076e505edaeSJeff LaBundy } 1077e505edaeSJeff LaBundy 1078e505edaeSJeff LaBundy static int iqs7222_force_comms(struct iqs7222_private *iqs7222) 1079e505edaeSJeff LaBundy { 108010e629d3SJeff LaBundy u8 msg_buf[] = { 0xFF, }; 1081e505edaeSJeff LaBundy int ret; 1082e505edaeSJeff LaBundy 1083e505edaeSJeff LaBundy /* 1084e505edaeSJeff LaBundy * The device cannot communicate until it asserts its interrupt (RDY) 1085e505edaeSJeff LaBundy * pin. Attempts to do so while RDY is deasserted return an ACK; how- 1086e505edaeSJeff LaBundy * ever all write data is ignored, and all read data returns 0xEE. 1087e505edaeSJeff LaBundy * 1088e505edaeSJeff LaBundy * Unsolicited communication must be preceded by a special force com- 1089e505edaeSJeff LaBundy * munication command, after which the device eventually asserts its 1090e505edaeSJeff LaBundy * RDY pin and agrees to communicate. 1091e505edaeSJeff LaBundy * 1092e505edaeSJeff LaBundy * Regardless of whether communication is forced or the result of an 1093e505edaeSJeff LaBundy * interrupt, the device automatically deasserts its RDY pin once it 1094e505edaeSJeff LaBundy * detects an I2C stop condition, or a timeout expires. 1095e505edaeSJeff LaBundy */ 1096e505edaeSJeff LaBundy ret = gpiod_get_value_cansleep(iqs7222->irq_gpio); 1097e505edaeSJeff LaBundy if (ret < 0) 1098e505edaeSJeff LaBundy return ret; 1099e505edaeSJeff LaBundy else if (ret > 0) 1100e505edaeSJeff LaBundy return 0; 1101e505edaeSJeff LaBundy 1102e505edaeSJeff LaBundy ret = i2c_master_send(iqs7222->client, msg_buf, sizeof(msg_buf)); 1103e505edaeSJeff LaBundy if (ret < (int)sizeof(msg_buf)) { 1104e505edaeSJeff LaBundy if (ret >= 0) 1105e505edaeSJeff LaBundy ret = -EIO; 1106e505edaeSJeff LaBundy 1107e505edaeSJeff LaBundy /* 1108e505edaeSJeff LaBundy * The datasheet states that the host must wait to retry any 1109e505edaeSJeff LaBundy * failed attempt to communicate over I2C. 1110e505edaeSJeff LaBundy */ 1111e505edaeSJeff LaBundy msleep(IQS7222_COMMS_RETRY_MS); 1112e505edaeSJeff LaBundy return ret; 1113e505edaeSJeff LaBundy } 1114e505edaeSJeff LaBundy 1115e505edaeSJeff LaBundy return iqs7222_irq_poll(iqs7222, IQS7222_COMMS_TIMEOUT_MS); 1116e505edaeSJeff LaBundy } 1117e505edaeSJeff LaBundy 1118e505edaeSJeff LaBundy static int iqs7222_read_burst(struct iqs7222_private *iqs7222, 1119e505edaeSJeff LaBundy u16 reg, void *val, u16 num_val) 1120e505edaeSJeff LaBundy { 1121e505edaeSJeff LaBundy u8 reg_buf[sizeof(__be16)]; 1122e505edaeSJeff LaBundy int ret, i; 1123e505edaeSJeff LaBundy struct i2c_client *client = iqs7222->client; 1124e505edaeSJeff LaBundy struct i2c_msg msg[] = { 1125e505edaeSJeff LaBundy { 1126e505edaeSJeff LaBundy .addr = client->addr, 1127e505edaeSJeff LaBundy .flags = 0, 1128e505edaeSJeff LaBundy .len = reg > U8_MAX ? sizeof(reg) : sizeof(u8), 1129e505edaeSJeff LaBundy .buf = reg_buf, 1130e505edaeSJeff LaBundy }, 1131e505edaeSJeff LaBundy { 1132e505edaeSJeff LaBundy .addr = client->addr, 1133e505edaeSJeff LaBundy .flags = I2C_M_RD, 1134e505edaeSJeff LaBundy .len = num_val * sizeof(__le16), 1135e505edaeSJeff LaBundy .buf = (u8 *)val, 1136e505edaeSJeff LaBundy }, 1137e505edaeSJeff LaBundy }; 1138e505edaeSJeff LaBundy 1139e505edaeSJeff LaBundy if (reg > U8_MAX) 1140e505edaeSJeff LaBundy put_unaligned_be16(reg, reg_buf); 1141e505edaeSJeff LaBundy else 1142e505edaeSJeff LaBundy *reg_buf = (u8)reg; 1143e505edaeSJeff LaBundy 1144e505edaeSJeff LaBundy /* 1145e505edaeSJeff LaBundy * The following loop protects against an edge case in which the RDY 1146e505edaeSJeff LaBundy * pin is automatically deasserted just as the read is initiated. In 1147e505edaeSJeff LaBundy * that case, the read must be retried using forced communication. 1148e505edaeSJeff LaBundy */ 1149e505edaeSJeff LaBundy for (i = 0; i < IQS7222_NUM_RETRIES; i++) { 1150e505edaeSJeff LaBundy ret = iqs7222_force_comms(iqs7222); 1151e505edaeSJeff LaBundy if (ret < 0) 1152e505edaeSJeff LaBundy continue; 1153e505edaeSJeff LaBundy 1154e505edaeSJeff LaBundy ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); 1155e505edaeSJeff LaBundy if (ret < (int)ARRAY_SIZE(msg)) { 1156e505edaeSJeff LaBundy if (ret >= 0) 1157e505edaeSJeff LaBundy ret = -EIO; 1158e505edaeSJeff LaBundy 1159e505edaeSJeff LaBundy msleep(IQS7222_COMMS_RETRY_MS); 1160e505edaeSJeff LaBundy continue; 1161e505edaeSJeff LaBundy } 1162e505edaeSJeff LaBundy 1163e505edaeSJeff LaBundy if (get_unaligned_le16(msg[1].buf) == IQS7222_COMMS_ERROR) { 1164e505edaeSJeff LaBundy ret = -ENODATA; 1165e505edaeSJeff LaBundy continue; 1166e505edaeSJeff LaBundy } 1167e505edaeSJeff LaBundy 1168e505edaeSJeff LaBundy ret = 0; 1169e505edaeSJeff LaBundy break; 1170e505edaeSJeff LaBundy } 1171e505edaeSJeff LaBundy 1172e505edaeSJeff LaBundy /* 1173e505edaeSJeff LaBundy * The following delay ensures the device has deasserted the RDY pin 1174e505edaeSJeff LaBundy * following the I2C stop condition. 1175e505edaeSJeff LaBundy */ 1176e505edaeSJeff LaBundy usleep_range(50, 100); 1177e505edaeSJeff LaBundy 1178e505edaeSJeff LaBundy if (ret < 0) 1179e505edaeSJeff LaBundy dev_err(&client->dev, 1180e505edaeSJeff LaBundy "Failed to read from address 0x%04X: %d\n", reg, ret); 1181e505edaeSJeff LaBundy 1182e505edaeSJeff LaBundy return ret; 1183e505edaeSJeff LaBundy } 1184e505edaeSJeff LaBundy 1185e505edaeSJeff LaBundy static int iqs7222_read_word(struct iqs7222_private *iqs7222, u16 reg, u16 *val) 1186e505edaeSJeff LaBundy { 1187e505edaeSJeff LaBundy __le16 val_buf; 1188e505edaeSJeff LaBundy int error; 1189e505edaeSJeff LaBundy 1190e505edaeSJeff LaBundy error = iqs7222_read_burst(iqs7222, reg, &val_buf, 1); 1191e505edaeSJeff LaBundy if (error) 1192e505edaeSJeff LaBundy return error; 1193e505edaeSJeff LaBundy 1194e505edaeSJeff LaBundy *val = le16_to_cpu(val_buf); 1195e505edaeSJeff LaBundy 1196e505edaeSJeff LaBundy return 0; 1197e505edaeSJeff LaBundy } 1198e505edaeSJeff LaBundy 1199e505edaeSJeff LaBundy static int iqs7222_write_burst(struct iqs7222_private *iqs7222, 1200e505edaeSJeff LaBundy u16 reg, const void *val, u16 num_val) 1201e505edaeSJeff LaBundy { 1202e505edaeSJeff LaBundy int reg_len = reg > U8_MAX ? sizeof(reg) : sizeof(u8); 1203e505edaeSJeff LaBundy int val_len = num_val * sizeof(__le16); 1204e505edaeSJeff LaBundy int msg_len = reg_len + val_len; 1205e505edaeSJeff LaBundy int ret, i; 1206e505edaeSJeff LaBundy struct i2c_client *client = iqs7222->client; 1207e505edaeSJeff LaBundy u8 *msg_buf; 1208e505edaeSJeff LaBundy 1209e505edaeSJeff LaBundy msg_buf = kzalloc(msg_len, GFP_KERNEL); 1210e505edaeSJeff LaBundy if (!msg_buf) 1211e505edaeSJeff LaBundy return -ENOMEM; 1212e505edaeSJeff LaBundy 1213e505edaeSJeff LaBundy if (reg > U8_MAX) 1214e505edaeSJeff LaBundy put_unaligned_be16(reg, msg_buf); 1215e505edaeSJeff LaBundy else 1216e505edaeSJeff LaBundy *msg_buf = (u8)reg; 1217e505edaeSJeff LaBundy 1218e505edaeSJeff LaBundy memcpy(msg_buf + reg_len, val, val_len); 1219e505edaeSJeff LaBundy 1220e505edaeSJeff LaBundy /* 1221e505edaeSJeff LaBundy * The following loop protects against an edge case in which the RDY 1222e505edaeSJeff LaBundy * pin is automatically asserted just before the force communication 1223e505edaeSJeff LaBundy * command is sent. 1224e505edaeSJeff LaBundy * 1225e505edaeSJeff LaBundy * In that case, the subsequent I2C stop condition tricks the device 1226e505edaeSJeff LaBundy * into preemptively deasserting the RDY pin and the command must be 1227e505edaeSJeff LaBundy * sent again. 1228e505edaeSJeff LaBundy */ 1229e505edaeSJeff LaBundy for (i = 0; i < IQS7222_NUM_RETRIES; i++) { 1230e505edaeSJeff LaBundy ret = iqs7222_force_comms(iqs7222); 1231e505edaeSJeff LaBundy if (ret < 0) 1232e505edaeSJeff LaBundy continue; 1233e505edaeSJeff LaBundy 1234e505edaeSJeff LaBundy ret = i2c_master_send(client, msg_buf, msg_len); 1235e505edaeSJeff LaBundy if (ret < msg_len) { 1236e505edaeSJeff LaBundy if (ret >= 0) 1237e505edaeSJeff LaBundy ret = -EIO; 1238e505edaeSJeff LaBundy 1239e505edaeSJeff LaBundy msleep(IQS7222_COMMS_RETRY_MS); 1240e505edaeSJeff LaBundy continue; 1241e505edaeSJeff LaBundy } 1242e505edaeSJeff LaBundy 1243e505edaeSJeff LaBundy ret = 0; 1244e505edaeSJeff LaBundy break; 1245e505edaeSJeff LaBundy } 1246e505edaeSJeff LaBundy 1247e505edaeSJeff LaBundy kfree(msg_buf); 1248e505edaeSJeff LaBundy 1249e505edaeSJeff LaBundy usleep_range(50, 100); 1250e505edaeSJeff LaBundy 1251e505edaeSJeff LaBundy if (ret < 0) 1252e505edaeSJeff LaBundy dev_err(&client->dev, 1253e505edaeSJeff LaBundy "Failed to write to address 0x%04X: %d\n", reg, ret); 1254e505edaeSJeff LaBundy 1255e505edaeSJeff LaBundy return ret; 1256e505edaeSJeff LaBundy } 1257e505edaeSJeff LaBundy 1258e505edaeSJeff LaBundy static int iqs7222_write_word(struct iqs7222_private *iqs7222, u16 reg, u16 val) 1259e505edaeSJeff LaBundy { 1260e505edaeSJeff LaBundy __le16 val_buf = cpu_to_le16(val); 1261e505edaeSJeff LaBundy 1262e505edaeSJeff LaBundy return iqs7222_write_burst(iqs7222, reg, &val_buf, 1); 1263e505edaeSJeff LaBundy } 1264e505edaeSJeff LaBundy 1265e505edaeSJeff LaBundy static int iqs7222_ati_trigger(struct iqs7222_private *iqs7222) 1266e505edaeSJeff LaBundy { 1267e505edaeSJeff LaBundy struct i2c_client *client = iqs7222->client; 1268e505edaeSJeff LaBundy ktime_t ati_timeout; 1269e505edaeSJeff LaBundy u16 sys_status = 0; 12701e4189d8SJeff LaBundy u16 sys_setup; 1271e505edaeSJeff LaBundy int error, i; 1272e505edaeSJeff LaBundy 12731e4189d8SJeff LaBundy /* 12741e4189d8SJeff LaBundy * The reserved fields of the system setup register may have changed 12751e4189d8SJeff LaBundy * as a result of other registers having been written. As such, read 12761e4189d8SJeff LaBundy * the register's latest value to avoid unexpected behavior when the 12771e4189d8SJeff LaBundy * register is written in the loop that follows. 12781e4189d8SJeff LaBundy */ 12791e4189d8SJeff LaBundy error = iqs7222_read_word(iqs7222, IQS7222_SYS_SETUP, &sys_setup); 12801e4189d8SJeff LaBundy if (error) 12811e4189d8SJeff LaBundy return error; 12821e4189d8SJeff LaBundy 12831e4189d8SJeff LaBundy sys_setup &= ~IQS7222_SYS_SETUP_INTF_MODE_MASK; 12841e4189d8SJeff LaBundy sys_setup &= ~IQS7222_SYS_SETUP_PWR_MODE_MASK; 12851e4189d8SJeff LaBundy 1286e505edaeSJeff LaBundy for (i = 0; i < IQS7222_NUM_RETRIES; i++) { 1287e505edaeSJeff LaBundy /* 1288e505edaeSJeff LaBundy * Trigger ATI from streaming and normal-power modes so that 1289e505edaeSJeff LaBundy * the RDY pin continues to be asserted during ATI. 1290e505edaeSJeff LaBundy */ 1291e505edaeSJeff LaBundy error = iqs7222_write_word(iqs7222, IQS7222_SYS_SETUP, 1292e505edaeSJeff LaBundy sys_setup | 1293e505edaeSJeff LaBundy IQS7222_SYS_SETUP_REDO_ATI); 1294e505edaeSJeff LaBundy if (error) 1295e505edaeSJeff LaBundy return error; 1296e505edaeSJeff LaBundy 1297e505edaeSJeff LaBundy ati_timeout = ktime_add_ms(ktime_get(), IQS7222_ATI_TIMEOUT_MS); 1298e505edaeSJeff LaBundy 1299e505edaeSJeff LaBundy do { 1300e505edaeSJeff LaBundy error = iqs7222_irq_poll(iqs7222, 1301e505edaeSJeff LaBundy IQS7222_COMMS_TIMEOUT_MS); 1302e505edaeSJeff LaBundy if (error) 1303e505edaeSJeff LaBundy continue; 1304e505edaeSJeff LaBundy 1305e505edaeSJeff LaBundy error = iqs7222_read_word(iqs7222, IQS7222_SYS_STATUS, 1306e505edaeSJeff LaBundy &sys_status); 1307e505edaeSJeff LaBundy if (error) 1308e505edaeSJeff LaBundy return error; 1309e505edaeSJeff LaBundy 13108635c688SJeff LaBundy if (sys_status & IQS7222_SYS_STATUS_RESET) 13118635c688SJeff LaBundy return 0; 1312e505edaeSJeff LaBundy 1313e505edaeSJeff LaBundy if (sys_status & IQS7222_SYS_STATUS_ATI_ERROR) 1314e505edaeSJeff LaBundy break; 1315e505edaeSJeff LaBundy 13168635c688SJeff LaBundy if (sys_status & IQS7222_SYS_STATUS_ATI_ACTIVE) 13178635c688SJeff LaBundy continue; 13188635c688SJeff LaBundy 1319e505edaeSJeff LaBundy /* 1320e505edaeSJeff LaBundy * Use stream-in-touch mode if either slider reports 1321e505edaeSJeff LaBundy * absolute position. 1322e505edaeSJeff LaBundy */ 1323e505edaeSJeff LaBundy sys_setup |= test_bit(EV_ABS, iqs7222->keypad->evbit) 1324e505edaeSJeff LaBundy ? IQS7222_SYS_SETUP_INTF_MODE_TOUCH 1325e505edaeSJeff LaBundy : IQS7222_SYS_SETUP_INTF_MODE_EVENT; 1326e505edaeSJeff LaBundy sys_setup |= IQS7222_SYS_SETUP_PWR_MODE_AUTO; 1327e505edaeSJeff LaBundy 1328e505edaeSJeff LaBundy return iqs7222_write_word(iqs7222, IQS7222_SYS_SETUP, 1329e505edaeSJeff LaBundy sys_setup); 1330e505edaeSJeff LaBundy } while (ktime_compare(ktime_get(), ati_timeout) < 0); 1331e505edaeSJeff LaBundy 1332e505edaeSJeff LaBundy dev_err(&client->dev, 1333e505edaeSJeff LaBundy "ATI attempt %d of %d failed with status 0x%02X, %s\n", 1334e505edaeSJeff LaBundy i + 1, IQS7222_NUM_RETRIES, (u8)sys_status, 13358635c688SJeff LaBundy i + 1 < IQS7222_NUM_RETRIES ? "retrying" : "stopping"); 1336e505edaeSJeff LaBundy } 1337e505edaeSJeff LaBundy 1338e505edaeSJeff LaBundy return -ETIMEDOUT; 1339e505edaeSJeff LaBundy } 1340e505edaeSJeff LaBundy 1341e505edaeSJeff LaBundy static int iqs7222_dev_init(struct iqs7222_private *iqs7222, int dir) 1342e505edaeSJeff LaBundy { 1343e505edaeSJeff LaBundy const struct iqs7222_dev_desc *dev_desc = iqs7222->dev_desc; 1344e505edaeSJeff LaBundy int comms_offset = dev_desc->comms_offset; 1345e505edaeSJeff LaBundy int error, i, j, k; 1346e505edaeSJeff LaBundy 1347e505edaeSJeff LaBundy /* 13482e70ef52SJeff LaBundy * Acknowledge reset before writing any registers in case the device 13492e70ef52SJeff LaBundy * suffers a spurious reset during initialization. Because this step 13502e70ef52SJeff LaBundy * may change the reserved fields of the second filter beta register, 13512e70ef52SJeff LaBundy * its cache must be updated. 13522e70ef52SJeff LaBundy * 13532e70ef52SJeff LaBundy * Writing the second filter beta register, in turn, may clobber the 13542e70ef52SJeff LaBundy * system status register. As such, the filter beta register pair is 13552e70ef52SJeff LaBundy * written first to protect against this hazard. 13562e70ef52SJeff LaBundy */ 13572e70ef52SJeff LaBundy if (dir == WRITE) { 13582e70ef52SJeff LaBundy u16 reg = dev_desc->reg_grps[IQS7222_REG_GRP_FILT].base + 1; 13592e70ef52SJeff LaBundy u16 filt_setup; 13602e70ef52SJeff LaBundy 13612e70ef52SJeff LaBundy error = iqs7222_write_word(iqs7222, IQS7222_SYS_SETUP, 13622e70ef52SJeff LaBundy iqs7222->sys_setup[0] | 13632e70ef52SJeff LaBundy IQS7222_SYS_SETUP_ACK_RESET); 13642e70ef52SJeff LaBundy if (error) 13652e70ef52SJeff LaBundy return error; 13662e70ef52SJeff LaBundy 13672e70ef52SJeff LaBundy error = iqs7222_read_word(iqs7222, reg, &filt_setup); 13682e70ef52SJeff LaBundy if (error) 13692e70ef52SJeff LaBundy return error; 13702e70ef52SJeff LaBundy 13712e70ef52SJeff LaBundy iqs7222->filt_setup[1] &= GENMASK(7, 0); 13722e70ef52SJeff LaBundy iqs7222->filt_setup[1] |= (filt_setup & ~GENMASK(7, 0)); 13732e70ef52SJeff LaBundy } 13742e70ef52SJeff LaBundy 13752e70ef52SJeff LaBundy /* 1376e505edaeSJeff LaBundy * Take advantage of the stop-bit disable function, if available, to 1377e505edaeSJeff LaBundy * save the trouble of having to reopen a communication window after 1378e505edaeSJeff LaBundy * each burst read or write. 1379e505edaeSJeff LaBundy */ 1380e505edaeSJeff LaBundy if (comms_offset) { 1381e505edaeSJeff LaBundy u16 comms_setup; 1382e505edaeSJeff LaBundy 1383e505edaeSJeff LaBundy error = iqs7222_read_word(iqs7222, 1384e505edaeSJeff LaBundy IQS7222_SYS_SETUP + comms_offset, 1385e505edaeSJeff LaBundy &comms_setup); 1386e505edaeSJeff LaBundy if (error) 1387e505edaeSJeff LaBundy return error; 1388e505edaeSJeff LaBundy 1389e505edaeSJeff LaBundy error = iqs7222_write_word(iqs7222, 1390e505edaeSJeff LaBundy IQS7222_SYS_SETUP + comms_offset, 1391e505edaeSJeff LaBundy comms_setup | IQS7222_COMMS_HOLD); 1392e505edaeSJeff LaBundy if (error) 1393e505edaeSJeff LaBundy return error; 1394e505edaeSJeff LaBundy } 1395e505edaeSJeff LaBundy 1396e505edaeSJeff LaBundy for (i = 0; i < IQS7222_NUM_REG_GRPS; i++) { 1397e505edaeSJeff LaBundy int num_row = dev_desc->reg_grps[i].num_row; 1398e505edaeSJeff LaBundy int num_col = dev_desc->reg_grps[i].num_col; 1399e505edaeSJeff LaBundy u16 reg = dev_desc->reg_grps[i].base; 1400e505edaeSJeff LaBundy __le16 *val_buf; 1401e505edaeSJeff LaBundy u16 *val; 1402e505edaeSJeff LaBundy 1403e505edaeSJeff LaBundy if (!num_col) 1404e505edaeSJeff LaBundy continue; 1405e505edaeSJeff LaBundy 1406e505edaeSJeff LaBundy val = iqs7222_setup(iqs7222, i, 0); 1407e505edaeSJeff LaBundy if (!val) 1408e505edaeSJeff LaBundy continue; 1409e505edaeSJeff LaBundy 1410e505edaeSJeff LaBundy val_buf = kcalloc(num_col, sizeof(__le16), GFP_KERNEL); 1411e505edaeSJeff LaBundy if (!val_buf) 1412e505edaeSJeff LaBundy return -ENOMEM; 1413e505edaeSJeff LaBundy 1414e505edaeSJeff LaBundy for (j = 0; j < num_row; j++) { 1415e505edaeSJeff LaBundy switch (dir) { 1416e505edaeSJeff LaBundy case READ: 1417e505edaeSJeff LaBundy error = iqs7222_read_burst(iqs7222, reg, 1418e505edaeSJeff LaBundy val_buf, num_col); 1419e505edaeSJeff LaBundy for (k = 0; k < num_col; k++) 1420e505edaeSJeff LaBundy val[k] = le16_to_cpu(val_buf[k]); 1421e505edaeSJeff LaBundy break; 1422e505edaeSJeff LaBundy 1423e505edaeSJeff LaBundy case WRITE: 1424e505edaeSJeff LaBundy for (k = 0; k < num_col; k++) 1425e505edaeSJeff LaBundy val_buf[k] = cpu_to_le16(val[k]); 1426e505edaeSJeff LaBundy error = iqs7222_write_burst(iqs7222, reg, 1427e505edaeSJeff LaBundy val_buf, num_col); 1428e505edaeSJeff LaBundy break; 1429e505edaeSJeff LaBundy 1430e505edaeSJeff LaBundy default: 1431e505edaeSJeff LaBundy error = -EINVAL; 1432e505edaeSJeff LaBundy } 1433e505edaeSJeff LaBundy 1434e505edaeSJeff LaBundy if (error) 1435e505edaeSJeff LaBundy break; 1436e505edaeSJeff LaBundy 1437e505edaeSJeff LaBundy reg += IQS7222_REG_OFFSET; 1438e505edaeSJeff LaBundy val += iqs7222_max_cols[i]; 1439e505edaeSJeff LaBundy } 1440e505edaeSJeff LaBundy 1441e505edaeSJeff LaBundy kfree(val_buf); 1442e505edaeSJeff LaBundy 1443e505edaeSJeff LaBundy if (error) 1444e505edaeSJeff LaBundy return error; 1445e505edaeSJeff LaBundy } 1446e505edaeSJeff LaBundy 1447e505edaeSJeff LaBundy if (comms_offset) { 1448e505edaeSJeff LaBundy u16 comms_setup; 1449e505edaeSJeff LaBundy 1450e505edaeSJeff LaBundy error = iqs7222_read_word(iqs7222, 1451e505edaeSJeff LaBundy IQS7222_SYS_SETUP + comms_offset, 1452e505edaeSJeff LaBundy &comms_setup); 1453e505edaeSJeff LaBundy if (error) 1454e505edaeSJeff LaBundy return error; 1455e505edaeSJeff LaBundy 1456e505edaeSJeff LaBundy error = iqs7222_write_word(iqs7222, 1457e505edaeSJeff LaBundy IQS7222_SYS_SETUP + comms_offset, 1458e505edaeSJeff LaBundy comms_setup & ~IQS7222_COMMS_HOLD); 1459e505edaeSJeff LaBundy if (error) 1460e505edaeSJeff LaBundy return error; 1461e505edaeSJeff LaBundy } 1462e505edaeSJeff LaBundy 1463e505edaeSJeff LaBundy if (dir == READ) 1464e505edaeSJeff LaBundy return 0; 1465e505edaeSJeff LaBundy 1466e505edaeSJeff LaBundy return iqs7222_ati_trigger(iqs7222); 1467e505edaeSJeff LaBundy } 1468e505edaeSJeff LaBundy 1469e505edaeSJeff LaBundy static int iqs7222_dev_info(struct iqs7222_private *iqs7222) 1470e505edaeSJeff LaBundy { 1471e505edaeSJeff LaBundy struct i2c_client *client = iqs7222->client; 1472e505edaeSJeff LaBundy bool prod_num_valid = false; 1473e505edaeSJeff LaBundy __le16 dev_id[3]; 1474e505edaeSJeff LaBundy int error, i; 1475e505edaeSJeff LaBundy 1476e505edaeSJeff LaBundy error = iqs7222_read_burst(iqs7222, IQS7222_PROD_NUM, dev_id, 1477e505edaeSJeff LaBundy ARRAY_SIZE(dev_id)); 1478e505edaeSJeff LaBundy if (error) 1479e505edaeSJeff LaBundy return error; 1480e505edaeSJeff LaBundy 1481e505edaeSJeff LaBundy for (i = 0; i < ARRAY_SIZE(iqs7222_devs); i++) { 1482e505edaeSJeff LaBundy if (le16_to_cpu(dev_id[0]) != iqs7222_devs[i].prod_num) 1483e505edaeSJeff LaBundy continue; 1484e505edaeSJeff LaBundy 1485e505edaeSJeff LaBundy prod_num_valid = true; 1486e505edaeSJeff LaBundy 1487e505edaeSJeff LaBundy if (le16_to_cpu(dev_id[1]) < iqs7222_devs[i].fw_major) 1488e505edaeSJeff LaBundy continue; 1489e505edaeSJeff LaBundy 1490e505edaeSJeff LaBundy if (le16_to_cpu(dev_id[2]) < iqs7222_devs[i].fw_minor) 1491e505edaeSJeff LaBundy continue; 1492e505edaeSJeff LaBundy 1493e505edaeSJeff LaBundy iqs7222->dev_desc = &iqs7222_devs[i]; 1494e505edaeSJeff LaBundy return 0; 1495e505edaeSJeff LaBundy } 1496e505edaeSJeff LaBundy 1497e505edaeSJeff LaBundy if (prod_num_valid) 1498e505edaeSJeff LaBundy dev_err(&client->dev, "Unsupported firmware revision: %u.%u\n", 1499e505edaeSJeff LaBundy le16_to_cpu(dev_id[1]), le16_to_cpu(dev_id[2])); 1500e505edaeSJeff LaBundy else 1501e505edaeSJeff LaBundy dev_err(&client->dev, "Unrecognized product number: %u\n", 1502e505edaeSJeff LaBundy le16_to_cpu(dev_id[0])); 1503e505edaeSJeff LaBundy 1504e505edaeSJeff LaBundy return -EINVAL; 1505e505edaeSJeff LaBundy } 1506e505edaeSJeff LaBundy 1507e505edaeSJeff LaBundy static int iqs7222_gpio_select(struct iqs7222_private *iqs7222, 1508e505edaeSJeff LaBundy struct fwnode_handle *child_node, 1509e505edaeSJeff LaBundy int child_enable, u16 child_link) 1510e505edaeSJeff LaBundy { 1511e505edaeSJeff LaBundy const struct iqs7222_dev_desc *dev_desc = iqs7222->dev_desc; 1512e505edaeSJeff LaBundy struct i2c_client *client = iqs7222->client; 1513e505edaeSJeff LaBundy int num_gpio = dev_desc->reg_grps[IQS7222_REG_GRP_GPIO].num_row; 1514e505edaeSJeff LaBundy int error, count, i; 1515e505edaeSJeff LaBundy unsigned int gpio_sel[ARRAY_SIZE(iqs7222_gpio_links)]; 1516e505edaeSJeff LaBundy 1517e505edaeSJeff LaBundy if (!num_gpio) 1518e505edaeSJeff LaBundy return 0; 1519e505edaeSJeff LaBundy 1520e505edaeSJeff LaBundy if (!fwnode_property_present(child_node, "azoteq,gpio-select")) 1521e505edaeSJeff LaBundy return 0; 1522e505edaeSJeff LaBundy 1523e505edaeSJeff LaBundy count = fwnode_property_count_u32(child_node, "azoteq,gpio-select"); 1524e505edaeSJeff LaBundy if (count > num_gpio) { 1525e505edaeSJeff LaBundy dev_err(&client->dev, "Invalid number of %s GPIOs\n", 1526e505edaeSJeff LaBundy fwnode_get_name(child_node)); 1527e505edaeSJeff LaBundy return -EINVAL; 1528e505edaeSJeff LaBundy } else if (count < 0) { 1529e505edaeSJeff LaBundy dev_err(&client->dev, "Failed to count %s GPIOs: %d\n", 1530e505edaeSJeff LaBundy fwnode_get_name(child_node), count); 1531e505edaeSJeff LaBundy return count; 1532e505edaeSJeff LaBundy } 1533e505edaeSJeff LaBundy 1534e505edaeSJeff LaBundy error = fwnode_property_read_u32_array(child_node, 1535e505edaeSJeff LaBundy "azoteq,gpio-select", 1536e505edaeSJeff LaBundy gpio_sel, count); 1537e505edaeSJeff LaBundy if (error) { 1538e505edaeSJeff LaBundy dev_err(&client->dev, "Failed to read %s GPIOs: %d\n", 1539e505edaeSJeff LaBundy fwnode_get_name(child_node), error); 1540e505edaeSJeff LaBundy return error; 1541e505edaeSJeff LaBundy } 1542e505edaeSJeff LaBundy 1543e505edaeSJeff LaBundy for (i = 0; i < count; i++) { 1544e505edaeSJeff LaBundy u16 *gpio_setup; 1545e505edaeSJeff LaBundy 1546e505edaeSJeff LaBundy if (gpio_sel[i] >= num_gpio) { 1547e505edaeSJeff LaBundy dev_err(&client->dev, "Invalid %s GPIO: %u\n", 1548e505edaeSJeff LaBundy fwnode_get_name(child_node), gpio_sel[i]); 1549e505edaeSJeff LaBundy return -EINVAL; 1550e505edaeSJeff LaBundy } 1551e505edaeSJeff LaBundy 1552e505edaeSJeff LaBundy gpio_setup = iqs7222->gpio_setup[gpio_sel[i]]; 1553e505edaeSJeff LaBundy 1554e505edaeSJeff LaBundy if (gpio_setup[2] && child_link != gpio_setup[2]) { 1555e505edaeSJeff LaBundy dev_err(&client->dev, 1556e505edaeSJeff LaBundy "Conflicting GPIO %u event types\n", 1557e505edaeSJeff LaBundy gpio_sel[i]); 1558e505edaeSJeff LaBundy return -EINVAL; 1559e505edaeSJeff LaBundy } 1560e505edaeSJeff LaBundy 1561e505edaeSJeff LaBundy gpio_setup[0] |= IQS7222_GPIO_SETUP_0_GPIO_EN; 1562e505edaeSJeff LaBundy gpio_setup[1] |= child_enable; 1563e505edaeSJeff LaBundy gpio_setup[2] = child_link; 1564e505edaeSJeff LaBundy } 1565e505edaeSJeff LaBundy 1566e505edaeSJeff LaBundy return 0; 1567e505edaeSJeff LaBundy } 1568e505edaeSJeff LaBundy 1569e505edaeSJeff LaBundy static int iqs7222_parse_props(struct iqs7222_private *iqs7222, 1570e505edaeSJeff LaBundy struct fwnode_handle **child_node, 1571e505edaeSJeff LaBundy int child_index, 1572e505edaeSJeff LaBundy enum iqs7222_reg_grp_id reg_grp, 1573e505edaeSJeff LaBundy enum iqs7222_reg_key_id reg_key) 1574e505edaeSJeff LaBundy { 1575e505edaeSJeff LaBundy u16 *setup = iqs7222_setup(iqs7222, reg_grp, child_index); 1576e505edaeSJeff LaBundy struct i2c_client *client = iqs7222->client; 157766ab05c7SJeff LaBundy struct fwnode_handle *reg_grp_node; 1578e505edaeSJeff LaBundy char reg_grp_name[16]; 1579e505edaeSJeff LaBundy int i; 1580e505edaeSJeff LaBundy 1581e505edaeSJeff LaBundy switch (reg_grp) { 1582e505edaeSJeff LaBundy case IQS7222_REG_GRP_CYCLE: 1583e505edaeSJeff LaBundy case IQS7222_REG_GRP_CHAN: 1584e505edaeSJeff LaBundy case IQS7222_REG_GRP_SLDR: 1585e505edaeSJeff LaBundy case IQS7222_REG_GRP_GPIO: 1586e505edaeSJeff LaBundy case IQS7222_REG_GRP_BTN: 1587e505edaeSJeff LaBundy /* 1588e505edaeSJeff LaBundy * These groups derive a child node and return it to the caller 1589e505edaeSJeff LaBundy * for additional group-specific processing. In some cases, the 1590e505edaeSJeff LaBundy * child node may have already been derived. 1591e505edaeSJeff LaBundy */ 159266ab05c7SJeff LaBundy reg_grp_node = *child_node; 159366ab05c7SJeff LaBundy if (reg_grp_node) 1594e505edaeSJeff LaBundy break; 1595e505edaeSJeff LaBundy 1596e505edaeSJeff LaBundy snprintf(reg_grp_name, sizeof(reg_grp_name), "%s-%d", 1597e505edaeSJeff LaBundy iqs7222_reg_grp_names[reg_grp], child_index); 1598e505edaeSJeff LaBundy 1599e505edaeSJeff LaBundy reg_grp_node = device_get_named_child_node(&client->dev, 1600e505edaeSJeff LaBundy reg_grp_name); 1601e505edaeSJeff LaBundy if (!reg_grp_node) 1602e505edaeSJeff LaBundy return 0; 1603e505edaeSJeff LaBundy 1604e505edaeSJeff LaBundy *child_node = reg_grp_node; 1605e505edaeSJeff LaBundy break; 1606e505edaeSJeff LaBundy 1607e505edaeSJeff LaBundy case IQS7222_REG_GRP_GLBL: 1608e505edaeSJeff LaBundy case IQS7222_REG_GRP_FILT: 1609e505edaeSJeff LaBundy case IQS7222_REG_GRP_SYS: 1610e505edaeSJeff LaBundy /* 1611e505edaeSJeff LaBundy * These groups are not organized beneath a child node, nor are 1612e505edaeSJeff LaBundy * they subject to any additional processing by the caller. 1613e505edaeSJeff LaBundy */ 1614e505edaeSJeff LaBundy reg_grp_node = dev_fwnode(&client->dev); 1615e505edaeSJeff LaBundy break; 1616e505edaeSJeff LaBundy 1617e505edaeSJeff LaBundy default: 1618e505edaeSJeff LaBundy return -EINVAL; 1619e505edaeSJeff LaBundy } 1620e505edaeSJeff LaBundy 1621e505edaeSJeff LaBundy for (i = 0; i < ARRAY_SIZE(iqs7222_props); i++) { 1622e505edaeSJeff LaBundy const char *name = iqs7222_props[i].name; 1623e505edaeSJeff LaBundy int reg_offset = iqs7222_props[i].reg_offset; 1624e505edaeSJeff LaBundy int reg_shift = iqs7222_props[i].reg_shift; 1625e505edaeSJeff LaBundy int reg_width = iqs7222_props[i].reg_width; 1626e505edaeSJeff LaBundy int val_pitch = iqs7222_props[i].val_pitch ? : 1; 1627e505edaeSJeff LaBundy int val_min = iqs7222_props[i].val_min; 1628e505edaeSJeff LaBundy int val_max = iqs7222_props[i].val_max; 1629e505edaeSJeff LaBundy bool invert = iqs7222_props[i].invert; 1630e505edaeSJeff LaBundy const char *label = iqs7222_props[i].label ? : name; 1631e505edaeSJeff LaBundy unsigned int val; 1632e505edaeSJeff LaBundy int error; 1633e505edaeSJeff LaBundy 1634e505edaeSJeff LaBundy if (iqs7222_props[i].reg_grp != reg_grp || 1635e505edaeSJeff LaBundy iqs7222_props[i].reg_key != reg_key) 1636e505edaeSJeff LaBundy continue; 1637e505edaeSJeff LaBundy 1638e505edaeSJeff LaBundy /* 1639e505edaeSJeff LaBundy * Boolean register fields are one bit wide; they are forcibly 1640e505edaeSJeff LaBundy * reset to provide a means to undo changes by a bootloader if 1641e505edaeSJeff LaBundy * necessary. 1642e505edaeSJeff LaBundy * 1643e505edaeSJeff LaBundy * Scalar fields, on the other hand, are left untouched unless 1644e505edaeSJeff LaBundy * their corresponding properties are present. 1645e505edaeSJeff LaBundy */ 1646e505edaeSJeff LaBundy if (reg_width == 1) { 1647e505edaeSJeff LaBundy if (invert) 1648e505edaeSJeff LaBundy setup[reg_offset] |= BIT(reg_shift); 1649e505edaeSJeff LaBundy else 1650e505edaeSJeff LaBundy setup[reg_offset] &= ~BIT(reg_shift); 1651e505edaeSJeff LaBundy } 1652e505edaeSJeff LaBundy 1653e505edaeSJeff LaBundy if (!fwnode_property_present(reg_grp_node, name)) 1654e505edaeSJeff LaBundy continue; 1655e505edaeSJeff LaBundy 1656e505edaeSJeff LaBundy if (reg_width == 1) { 1657e505edaeSJeff LaBundy if (invert) 1658e505edaeSJeff LaBundy setup[reg_offset] &= ~BIT(reg_shift); 1659e505edaeSJeff LaBundy else 1660e505edaeSJeff LaBundy setup[reg_offset] |= BIT(reg_shift); 1661e505edaeSJeff LaBundy 1662e505edaeSJeff LaBundy continue; 1663e505edaeSJeff LaBundy } 1664e505edaeSJeff LaBundy 1665e505edaeSJeff LaBundy error = fwnode_property_read_u32(reg_grp_node, name, &val); 1666e505edaeSJeff LaBundy if (error) { 1667e505edaeSJeff LaBundy dev_err(&client->dev, "Failed to read %s %s: %d\n", 1668e505edaeSJeff LaBundy fwnode_get_name(reg_grp_node), label, error); 1669e505edaeSJeff LaBundy return error; 1670e505edaeSJeff LaBundy } 1671e505edaeSJeff LaBundy 1672e505edaeSJeff LaBundy if (!val_max) 1673e505edaeSJeff LaBundy val_max = GENMASK(reg_width - 1, 0) * val_pitch; 1674e505edaeSJeff LaBundy 1675e505edaeSJeff LaBundy if (val < val_min || val > val_max) { 1676e505edaeSJeff LaBundy dev_err(&client->dev, "Invalid %s %s: %u\n", 1677e505edaeSJeff LaBundy fwnode_get_name(reg_grp_node), label, val); 1678e505edaeSJeff LaBundy return -EINVAL; 1679e505edaeSJeff LaBundy } 1680e505edaeSJeff LaBundy 1681e505edaeSJeff LaBundy setup[reg_offset] &= ~GENMASK(reg_shift + reg_width - 1, 1682e505edaeSJeff LaBundy reg_shift); 1683e505edaeSJeff LaBundy setup[reg_offset] |= (val / val_pitch << reg_shift); 1684e505edaeSJeff LaBundy } 1685e505edaeSJeff LaBundy 1686e505edaeSJeff LaBundy return 0; 1687e505edaeSJeff LaBundy } 1688e505edaeSJeff LaBundy 1689e505edaeSJeff LaBundy static int iqs7222_parse_cycle(struct iqs7222_private *iqs7222, int cycle_index) 1690e505edaeSJeff LaBundy { 1691e505edaeSJeff LaBundy u16 *cycle_setup = iqs7222->cycle_setup[cycle_index]; 1692e505edaeSJeff LaBundy struct i2c_client *client = iqs7222->client; 1693e505edaeSJeff LaBundy struct fwnode_handle *cycle_node = NULL; 1694e505edaeSJeff LaBundy unsigned int pins[9]; 1695e505edaeSJeff LaBundy int error, count, i; 1696e505edaeSJeff LaBundy 1697e505edaeSJeff LaBundy /* 1698e505edaeSJeff LaBundy * Each channel shares a cycle with one other channel; the mapping of 1699e505edaeSJeff LaBundy * channels to cycles is fixed. Properties defined for a cycle impact 1700e505edaeSJeff LaBundy * both channels tied to the cycle. 1701e505edaeSJeff LaBundy */ 1702e505edaeSJeff LaBundy error = iqs7222_parse_props(iqs7222, &cycle_node, cycle_index, 1703e505edaeSJeff LaBundy IQS7222_REG_GRP_CYCLE, 1704e505edaeSJeff LaBundy IQS7222_REG_KEY_NONE); 1705e505edaeSJeff LaBundy if (error) 1706e505edaeSJeff LaBundy return error; 1707e505edaeSJeff LaBundy 1708e505edaeSJeff LaBundy if (!cycle_node) 1709e505edaeSJeff LaBundy return 0; 1710e505edaeSJeff LaBundy 1711e505edaeSJeff LaBundy /* 1712e505edaeSJeff LaBundy * Unlike channels which are restricted to a select range of CRx pins 1713e505edaeSJeff LaBundy * based on channel number, any cycle can claim any of the device's 9 1714e505edaeSJeff LaBundy * CTx pins (CTx0-8). 1715e505edaeSJeff LaBundy */ 1716e505edaeSJeff LaBundy if (!fwnode_property_present(cycle_node, "azoteq,tx-enable")) 1717e505edaeSJeff LaBundy return 0; 1718e505edaeSJeff LaBundy 1719e505edaeSJeff LaBundy count = fwnode_property_count_u32(cycle_node, "azoteq,tx-enable"); 1720eba697b3SDan Carpenter if (count < 0) { 1721e505edaeSJeff LaBundy dev_err(&client->dev, "Failed to count %s CTx pins: %d\n", 1722e505edaeSJeff LaBundy fwnode_get_name(cycle_node), count); 1723e505edaeSJeff LaBundy return count; 1724eba697b3SDan Carpenter } else if (count > ARRAY_SIZE(pins)) { 1725eba697b3SDan Carpenter dev_err(&client->dev, "Invalid number of %s CTx pins\n", 1726eba697b3SDan Carpenter fwnode_get_name(cycle_node)); 1727eba697b3SDan Carpenter return -EINVAL; 1728e505edaeSJeff LaBundy } 1729e505edaeSJeff LaBundy 1730e505edaeSJeff LaBundy error = fwnode_property_read_u32_array(cycle_node, "azoteq,tx-enable", 1731e505edaeSJeff LaBundy pins, count); 1732e505edaeSJeff LaBundy if (error) { 1733e505edaeSJeff LaBundy dev_err(&client->dev, "Failed to read %s CTx pins: %d\n", 1734e505edaeSJeff LaBundy fwnode_get_name(cycle_node), error); 1735e505edaeSJeff LaBundy return error; 1736e505edaeSJeff LaBundy } 1737e505edaeSJeff LaBundy 1738e505edaeSJeff LaBundy cycle_setup[1] &= ~GENMASK(7 + ARRAY_SIZE(pins) - 1, 7); 1739e505edaeSJeff LaBundy 1740e505edaeSJeff LaBundy for (i = 0; i < count; i++) { 1741e505edaeSJeff LaBundy if (pins[i] > 8) { 1742e505edaeSJeff LaBundy dev_err(&client->dev, "Invalid %s CTx pin: %u\n", 1743e505edaeSJeff LaBundy fwnode_get_name(cycle_node), pins[i]); 1744e505edaeSJeff LaBundy return -EINVAL; 1745e505edaeSJeff LaBundy } 1746e505edaeSJeff LaBundy 1747e505edaeSJeff LaBundy cycle_setup[1] |= BIT(pins[i] + 7); 1748e505edaeSJeff LaBundy } 1749e505edaeSJeff LaBundy 1750e505edaeSJeff LaBundy return 0; 1751e505edaeSJeff LaBundy } 1752e505edaeSJeff LaBundy 1753e505edaeSJeff LaBundy static int iqs7222_parse_chan(struct iqs7222_private *iqs7222, int chan_index) 1754e505edaeSJeff LaBundy { 1755e505edaeSJeff LaBundy const struct iqs7222_dev_desc *dev_desc = iqs7222->dev_desc; 1756e505edaeSJeff LaBundy struct i2c_client *client = iqs7222->client; 1757e505edaeSJeff LaBundy struct fwnode_handle *chan_node = NULL; 1758e505edaeSJeff LaBundy int num_chan = dev_desc->reg_grps[IQS7222_REG_GRP_CHAN].num_row; 1759e505edaeSJeff LaBundy int ext_chan = rounddown(num_chan, 10); 1760e505edaeSJeff LaBundy int error, i; 1761e505edaeSJeff LaBundy u16 *chan_setup = iqs7222->chan_setup[chan_index]; 1762e505edaeSJeff LaBundy u16 *sys_setup = iqs7222->sys_setup; 1763e505edaeSJeff LaBundy unsigned int val; 1764e505edaeSJeff LaBundy 1765e505edaeSJeff LaBundy error = iqs7222_parse_props(iqs7222, &chan_node, chan_index, 1766e505edaeSJeff LaBundy IQS7222_REG_GRP_CHAN, 1767e505edaeSJeff LaBundy IQS7222_REG_KEY_NONE); 1768e505edaeSJeff LaBundy if (error) 1769e505edaeSJeff LaBundy return error; 1770e505edaeSJeff LaBundy 1771e505edaeSJeff LaBundy if (!chan_node) 1772e505edaeSJeff LaBundy return 0; 1773e505edaeSJeff LaBundy 1774*d56111edSJeff LaBundy if (dev_desc->allow_offset && 1775*d56111edSJeff LaBundy fwnode_property_present(chan_node, "azoteq,ulp-allow")) 1776e505edaeSJeff LaBundy sys_setup[dev_desc->allow_offset] &= ~BIT(chan_index); 1777e505edaeSJeff LaBundy 1778e505edaeSJeff LaBundy chan_setup[0] |= IQS7222_CHAN_SETUP_0_CHAN_EN; 1779e505edaeSJeff LaBundy 1780e505edaeSJeff LaBundy /* 1781e505edaeSJeff LaBundy * The reference channel function allows for differential measurements 1782e505edaeSJeff LaBundy * and is only available in the case of IQS7222A or IQS7222C. 1783e505edaeSJeff LaBundy */ 1784e505edaeSJeff LaBundy if (dev_desc->reg_grps[IQS7222_REG_GRP_CHAN].num_col > 4 && 1785e505edaeSJeff LaBundy fwnode_property_present(chan_node, "azoteq,ref-select")) { 1786e505edaeSJeff LaBundy u16 *ref_setup; 1787e505edaeSJeff LaBundy 1788e505edaeSJeff LaBundy error = fwnode_property_read_u32(chan_node, "azoteq,ref-select", 1789e505edaeSJeff LaBundy &val); 1790e505edaeSJeff LaBundy if (error) { 1791e505edaeSJeff LaBundy dev_err(&client->dev, 1792e505edaeSJeff LaBundy "Failed to read %s reference channel: %d\n", 1793e505edaeSJeff LaBundy fwnode_get_name(chan_node), error); 1794e505edaeSJeff LaBundy return error; 1795e505edaeSJeff LaBundy } 1796e505edaeSJeff LaBundy 1797e505edaeSJeff LaBundy if (val >= ext_chan) { 1798e505edaeSJeff LaBundy dev_err(&client->dev, 1799e505edaeSJeff LaBundy "Invalid %s reference channel: %u\n", 1800e505edaeSJeff LaBundy fwnode_get_name(chan_node), val); 1801e505edaeSJeff LaBundy return -EINVAL; 1802e505edaeSJeff LaBundy } 1803e505edaeSJeff LaBundy 1804e505edaeSJeff LaBundy ref_setup = iqs7222->chan_setup[val]; 1805e505edaeSJeff LaBundy 1806e505edaeSJeff LaBundy /* 1807e505edaeSJeff LaBundy * Configure the current channel as a follower of the selected 1808e505edaeSJeff LaBundy * reference channel. 1809e505edaeSJeff LaBundy */ 1810e505edaeSJeff LaBundy chan_setup[0] |= IQS7222_CHAN_SETUP_0_REF_MODE_FOLLOW; 1811e505edaeSJeff LaBundy chan_setup[4] = val * 42 + 1048; 1812e505edaeSJeff LaBundy 1813e505edaeSJeff LaBundy if (!fwnode_property_read_u32(chan_node, "azoteq,ref-weight", 1814e505edaeSJeff LaBundy &val)) { 1815e505edaeSJeff LaBundy if (val > U16_MAX) { 1816e505edaeSJeff LaBundy dev_err(&client->dev, 1817e505edaeSJeff LaBundy "Invalid %s reference weight: %u\n", 1818e505edaeSJeff LaBundy fwnode_get_name(chan_node), val); 1819e505edaeSJeff LaBundy return -EINVAL; 1820e505edaeSJeff LaBundy } 1821e505edaeSJeff LaBundy 1822e505edaeSJeff LaBundy chan_setup[5] = val; 1823e505edaeSJeff LaBundy } 1824e505edaeSJeff LaBundy 1825e505edaeSJeff LaBundy /* 1826e505edaeSJeff LaBundy * Configure the selected channel as a reference channel which 1827e505edaeSJeff LaBundy * serves the current channel. 1828e505edaeSJeff LaBundy */ 1829e505edaeSJeff LaBundy ref_setup[0] |= IQS7222_CHAN_SETUP_0_REF_MODE_REF; 1830e505edaeSJeff LaBundy ref_setup[5] |= BIT(chan_index); 1831e505edaeSJeff LaBundy 1832e505edaeSJeff LaBundy ref_setup[4] = dev_desc->touch_link; 1833e505edaeSJeff LaBundy if (fwnode_property_present(chan_node, "azoteq,use-prox")) 1834e505edaeSJeff LaBundy ref_setup[4] -= 2; 1835e505edaeSJeff LaBundy } 1836e505edaeSJeff LaBundy 1837e505edaeSJeff LaBundy if (fwnode_property_present(chan_node, "azoteq,rx-enable")) { 1838e505edaeSJeff LaBundy /* 1839e505edaeSJeff LaBundy * Each channel can claim up to 4 CRx pins. The first half of 1840e505edaeSJeff LaBundy * the channels can use CRx0-3, while the second half can use 1841e505edaeSJeff LaBundy * CRx4-7. 1842e505edaeSJeff LaBundy */ 1843e505edaeSJeff LaBundy unsigned int pins[4]; 1844e505edaeSJeff LaBundy int count; 1845e505edaeSJeff LaBundy 1846e505edaeSJeff LaBundy count = fwnode_property_count_u32(chan_node, 1847e505edaeSJeff LaBundy "azoteq,rx-enable"); 1848eba697b3SDan Carpenter if (count < 0) { 1849e505edaeSJeff LaBundy dev_err(&client->dev, 1850e505edaeSJeff LaBundy "Failed to count %s CRx pins: %d\n", 1851e505edaeSJeff LaBundy fwnode_get_name(chan_node), count); 1852e505edaeSJeff LaBundy return count; 1853eba697b3SDan Carpenter } else if (count > ARRAY_SIZE(pins)) { 1854eba697b3SDan Carpenter dev_err(&client->dev, 1855eba697b3SDan Carpenter "Invalid number of %s CRx pins\n", 1856eba697b3SDan Carpenter fwnode_get_name(chan_node)); 1857eba697b3SDan Carpenter return -EINVAL; 1858e505edaeSJeff LaBundy } 1859e505edaeSJeff LaBundy 1860e505edaeSJeff LaBundy error = fwnode_property_read_u32_array(chan_node, 1861e505edaeSJeff LaBundy "azoteq,rx-enable", 1862e505edaeSJeff LaBundy pins, count); 1863e505edaeSJeff LaBundy if (error) { 1864e505edaeSJeff LaBundy dev_err(&client->dev, 1865e505edaeSJeff LaBundy "Failed to read %s CRx pins: %d\n", 1866e505edaeSJeff LaBundy fwnode_get_name(chan_node), error); 1867e505edaeSJeff LaBundy return error; 1868e505edaeSJeff LaBundy } 1869e505edaeSJeff LaBundy 1870e505edaeSJeff LaBundy chan_setup[0] &= ~GENMASK(4 + ARRAY_SIZE(pins) - 1, 4); 1871e505edaeSJeff LaBundy 1872e505edaeSJeff LaBundy for (i = 0; i < count; i++) { 1873e505edaeSJeff LaBundy int min_crx = chan_index < ext_chan / 2 ? 0 : 4; 1874e505edaeSJeff LaBundy 1875e505edaeSJeff LaBundy if (pins[i] < min_crx || pins[i] > min_crx + 3) { 1876e505edaeSJeff LaBundy dev_err(&client->dev, 1877e505edaeSJeff LaBundy "Invalid %s CRx pin: %u\n", 1878e505edaeSJeff LaBundy fwnode_get_name(chan_node), pins[i]); 1879e505edaeSJeff LaBundy return -EINVAL; 1880e505edaeSJeff LaBundy } 1881e505edaeSJeff LaBundy 1882e505edaeSJeff LaBundy chan_setup[0] |= BIT(pins[i] + 4 - min_crx); 1883e505edaeSJeff LaBundy } 1884e505edaeSJeff LaBundy } 1885e505edaeSJeff LaBundy 1886e505edaeSJeff LaBundy for (i = 0; i < ARRAY_SIZE(iqs7222_kp_events); i++) { 1887e505edaeSJeff LaBundy const char *event_name = iqs7222_kp_events[i].name; 1888e505edaeSJeff LaBundy u16 event_enable = iqs7222_kp_events[i].enable; 1889e505edaeSJeff LaBundy struct fwnode_handle *event_node; 1890e505edaeSJeff LaBundy 1891e505edaeSJeff LaBundy event_node = fwnode_get_named_child_node(chan_node, event_name); 1892e505edaeSJeff LaBundy if (!event_node) 1893e505edaeSJeff LaBundy continue; 1894e505edaeSJeff LaBundy 1895e505edaeSJeff LaBundy error = iqs7222_parse_props(iqs7222, &event_node, chan_index, 1896e505edaeSJeff LaBundy IQS7222_REG_GRP_BTN, 1897e505edaeSJeff LaBundy iqs7222_kp_events[i].reg_key); 1898e505edaeSJeff LaBundy if (error) 1899e505edaeSJeff LaBundy return error; 1900e505edaeSJeff LaBundy 1901e505edaeSJeff LaBundy error = iqs7222_gpio_select(iqs7222, event_node, 1902e505edaeSJeff LaBundy BIT(chan_index), 1903e505edaeSJeff LaBundy dev_desc->touch_link - (i ? 0 : 2)); 1904e505edaeSJeff LaBundy if (error) 1905e505edaeSJeff LaBundy return error; 1906e505edaeSJeff LaBundy 1907e505edaeSJeff LaBundy if (!fwnode_property_read_u32(event_node, 1908e505edaeSJeff LaBundy "azoteq,timeout-press-ms", 1909e505edaeSJeff LaBundy &val)) { 1910e505edaeSJeff LaBundy /* 1911e505edaeSJeff LaBundy * The IQS7222B employs a global pair of press timeout 1912e505edaeSJeff LaBundy * registers as opposed to channel-specific registers. 1913e505edaeSJeff LaBundy */ 1914e505edaeSJeff LaBundy u16 *setup = dev_desc->reg_grps 1915e505edaeSJeff LaBundy [IQS7222_REG_GRP_BTN].num_col > 2 ? 1916e505edaeSJeff LaBundy &iqs7222->btn_setup[chan_index][2] : 1917e505edaeSJeff LaBundy &sys_setup[9]; 1918e505edaeSJeff LaBundy 1919e505edaeSJeff LaBundy if (val > U8_MAX * 500) { 1920e505edaeSJeff LaBundy dev_err(&client->dev, 1921e505edaeSJeff LaBundy "Invalid %s press timeout: %u\n", 1922e505edaeSJeff LaBundy fwnode_get_name(chan_node), val); 1923e505edaeSJeff LaBundy return -EINVAL; 1924e505edaeSJeff LaBundy } 1925e505edaeSJeff LaBundy 1926e505edaeSJeff LaBundy *setup &= ~(U8_MAX << i * 8); 1927e505edaeSJeff LaBundy *setup |= (val / 500 << i * 8); 1928e505edaeSJeff LaBundy } 1929e505edaeSJeff LaBundy 1930e505edaeSJeff LaBundy error = fwnode_property_read_u32(event_node, "linux,code", 1931e505edaeSJeff LaBundy &val); 1932e505edaeSJeff LaBundy if (error) { 1933e505edaeSJeff LaBundy dev_err(&client->dev, "Failed to read %s code: %d\n", 1934e505edaeSJeff LaBundy fwnode_get_name(chan_node), error); 1935e505edaeSJeff LaBundy return error; 1936e505edaeSJeff LaBundy } 1937e505edaeSJeff LaBundy 1938e505edaeSJeff LaBundy iqs7222->kp_code[chan_index][i] = val; 1939e505edaeSJeff LaBundy iqs7222->kp_type[chan_index][i] = EV_KEY; 1940e505edaeSJeff LaBundy 1941e505edaeSJeff LaBundy if (fwnode_property_present(event_node, "linux,input-type")) { 1942e505edaeSJeff LaBundy error = fwnode_property_read_u32(event_node, 1943e505edaeSJeff LaBundy "linux,input-type", 1944e505edaeSJeff LaBundy &val); 1945e505edaeSJeff LaBundy if (error) { 1946e505edaeSJeff LaBundy dev_err(&client->dev, 1947e505edaeSJeff LaBundy "Failed to read %s input type: %d\n", 1948e505edaeSJeff LaBundy fwnode_get_name(chan_node), error); 1949e505edaeSJeff LaBundy return error; 1950e505edaeSJeff LaBundy } 1951e505edaeSJeff LaBundy 1952e505edaeSJeff LaBundy if (val != EV_KEY && val != EV_SW) { 1953e505edaeSJeff LaBundy dev_err(&client->dev, 1954e505edaeSJeff LaBundy "Invalid %s input type: %u\n", 1955e505edaeSJeff LaBundy fwnode_get_name(chan_node), val); 1956e505edaeSJeff LaBundy return -EINVAL; 1957e505edaeSJeff LaBundy } 1958e505edaeSJeff LaBundy 1959e505edaeSJeff LaBundy iqs7222->kp_type[chan_index][i] = val; 1960e505edaeSJeff LaBundy } 1961e505edaeSJeff LaBundy 1962e505edaeSJeff LaBundy /* 1963e505edaeSJeff LaBundy * Reference channels can opt out of event reporting by using 1964e505edaeSJeff LaBundy * KEY_RESERVED in place of a true key or switch code. 1965e505edaeSJeff LaBundy */ 1966e505edaeSJeff LaBundy if (iqs7222->kp_type[chan_index][i] == EV_KEY && 1967e505edaeSJeff LaBundy iqs7222->kp_code[chan_index][i] == KEY_RESERVED) 1968e505edaeSJeff LaBundy continue; 1969e505edaeSJeff LaBundy 1970e505edaeSJeff LaBundy input_set_capability(iqs7222->keypad, 1971e505edaeSJeff LaBundy iqs7222->kp_type[chan_index][i], 1972e505edaeSJeff LaBundy iqs7222->kp_code[chan_index][i]); 1973e505edaeSJeff LaBundy 1974e505edaeSJeff LaBundy if (!dev_desc->event_offset) 1975e505edaeSJeff LaBundy continue; 1976e505edaeSJeff LaBundy 1977e505edaeSJeff LaBundy sys_setup[dev_desc->event_offset] |= event_enable; 1978e505edaeSJeff LaBundy } 1979e505edaeSJeff LaBundy 1980e505edaeSJeff LaBundy /* 1981e505edaeSJeff LaBundy * The following call handles a special pair of properties that apply 1982e505edaeSJeff LaBundy * to a channel node, but reside within the button (event) group. 1983e505edaeSJeff LaBundy */ 1984e505edaeSJeff LaBundy return iqs7222_parse_props(iqs7222, &chan_node, chan_index, 1985e505edaeSJeff LaBundy IQS7222_REG_GRP_BTN, 1986e505edaeSJeff LaBundy IQS7222_REG_KEY_DEBOUNCE); 1987e505edaeSJeff LaBundy } 1988e505edaeSJeff LaBundy 1989e505edaeSJeff LaBundy static int iqs7222_parse_sldr(struct iqs7222_private *iqs7222, int sldr_index) 1990e505edaeSJeff LaBundy { 1991e505edaeSJeff LaBundy const struct iqs7222_dev_desc *dev_desc = iqs7222->dev_desc; 1992e505edaeSJeff LaBundy struct i2c_client *client = iqs7222->client; 1993e505edaeSJeff LaBundy struct fwnode_handle *sldr_node = NULL; 1994e505edaeSJeff LaBundy int num_chan = dev_desc->reg_grps[IQS7222_REG_GRP_CHAN].num_row; 1995e505edaeSJeff LaBundy int ext_chan = rounddown(num_chan, 10); 1996e505edaeSJeff LaBundy int count, error, reg_offset, i; 199795215d3dSJeff LaBundy u16 *event_mask = &iqs7222->sys_setup[dev_desc->event_offset]; 1998e505edaeSJeff LaBundy u16 *sldr_setup = iqs7222->sldr_setup[sldr_index]; 1999e505edaeSJeff LaBundy unsigned int chan_sel[4], val; 2000e505edaeSJeff LaBundy 2001e505edaeSJeff LaBundy error = iqs7222_parse_props(iqs7222, &sldr_node, sldr_index, 2002e505edaeSJeff LaBundy IQS7222_REG_GRP_SLDR, 2003e505edaeSJeff LaBundy IQS7222_REG_KEY_NONE); 2004e505edaeSJeff LaBundy if (error) 2005e505edaeSJeff LaBundy return error; 2006e505edaeSJeff LaBundy 2007e505edaeSJeff LaBundy if (!sldr_node) 2008e505edaeSJeff LaBundy return 0; 2009e505edaeSJeff LaBundy 2010e505edaeSJeff LaBundy /* 2011e505edaeSJeff LaBundy * Each slider can be spread across 3 to 4 channels. It is possible to 2012e505edaeSJeff LaBundy * select only 2 channels, but doing so prevents the slider from using 2013e505edaeSJeff LaBundy * the specified resolution. 2014e505edaeSJeff LaBundy */ 2015e505edaeSJeff LaBundy count = fwnode_property_count_u32(sldr_node, "azoteq,channel-select"); 2016eba697b3SDan Carpenter if (count < 0) { 2017e505edaeSJeff LaBundy dev_err(&client->dev, "Failed to count %s channels: %d\n", 2018e505edaeSJeff LaBundy fwnode_get_name(sldr_node), count); 2019e505edaeSJeff LaBundy return count; 2020eba697b3SDan Carpenter } else if (count < 3 || count > ARRAY_SIZE(chan_sel)) { 2021eba697b3SDan Carpenter dev_err(&client->dev, "Invalid number of %s channels\n", 2022eba697b3SDan Carpenter fwnode_get_name(sldr_node)); 2023eba697b3SDan Carpenter return -EINVAL; 2024e505edaeSJeff LaBundy } 2025e505edaeSJeff LaBundy 2026e505edaeSJeff LaBundy error = fwnode_property_read_u32_array(sldr_node, 2027e505edaeSJeff LaBundy "azoteq,channel-select", 2028e505edaeSJeff LaBundy chan_sel, count); 2029e505edaeSJeff LaBundy if (error) { 2030e505edaeSJeff LaBundy dev_err(&client->dev, "Failed to read %s channels: %d\n", 2031e505edaeSJeff LaBundy fwnode_get_name(sldr_node), error); 2032e505edaeSJeff LaBundy return error; 2033e505edaeSJeff LaBundy } 2034e505edaeSJeff LaBundy 2035e505edaeSJeff LaBundy /* 2036e505edaeSJeff LaBundy * Resolution and top speed, if small enough, are packed into a single 2037e505edaeSJeff LaBundy * register. Otherwise, each occupies its own register and the rest of 2038e505edaeSJeff LaBundy * the slider-related register addresses are offset by one. 2039e505edaeSJeff LaBundy */ 2040e505edaeSJeff LaBundy reg_offset = dev_desc->sldr_res < U16_MAX ? 0 : 1; 2041e505edaeSJeff LaBundy 2042e505edaeSJeff LaBundy sldr_setup[0] |= count; 204395215d3dSJeff LaBundy sldr_setup[3 + reg_offset] &= ~GENMASK(ext_chan - 1, 0); 2044e505edaeSJeff LaBundy 2045e505edaeSJeff LaBundy for (i = 0; i < ARRAY_SIZE(chan_sel); i++) { 2046e505edaeSJeff LaBundy sldr_setup[5 + reg_offset + i] = 0; 2047e505edaeSJeff LaBundy if (i >= count) 2048e505edaeSJeff LaBundy continue; 2049e505edaeSJeff LaBundy 2050e505edaeSJeff LaBundy if (chan_sel[i] >= ext_chan) { 2051e505edaeSJeff LaBundy dev_err(&client->dev, "Invalid %s channel: %u\n", 2052e505edaeSJeff LaBundy fwnode_get_name(sldr_node), chan_sel[i]); 2053e505edaeSJeff LaBundy return -EINVAL; 2054e505edaeSJeff LaBundy } 2055e505edaeSJeff LaBundy 2056e505edaeSJeff LaBundy /* 2057e505edaeSJeff LaBundy * The following fields indicate which channels participate in 2058e505edaeSJeff LaBundy * the slider, as well as each channel's relative placement. 2059e505edaeSJeff LaBundy */ 2060e505edaeSJeff LaBundy sldr_setup[3 + reg_offset] |= BIT(chan_sel[i]); 2061e505edaeSJeff LaBundy sldr_setup[5 + reg_offset + i] = chan_sel[i] * 42 + 1080; 2062e505edaeSJeff LaBundy } 2063e505edaeSJeff LaBundy 2064e505edaeSJeff LaBundy sldr_setup[4 + reg_offset] = dev_desc->touch_link; 2065e505edaeSJeff LaBundy if (fwnode_property_present(sldr_node, "azoteq,use-prox")) 2066e505edaeSJeff LaBundy sldr_setup[4 + reg_offset] -= 2; 2067e505edaeSJeff LaBundy 2068e505edaeSJeff LaBundy if (!fwnode_property_read_u32(sldr_node, "azoteq,slider-size", &val)) { 2069e505edaeSJeff LaBundy if (!val || val > dev_desc->sldr_res) { 2070e505edaeSJeff LaBundy dev_err(&client->dev, "Invalid %s size: %u\n", 2071e505edaeSJeff LaBundy fwnode_get_name(sldr_node), val); 2072e505edaeSJeff LaBundy return -EINVAL; 2073e505edaeSJeff LaBundy } 2074e505edaeSJeff LaBundy 2075e505edaeSJeff LaBundy if (reg_offset) { 2076e505edaeSJeff LaBundy sldr_setup[3] = val; 2077e505edaeSJeff LaBundy } else { 2078e505edaeSJeff LaBundy sldr_setup[2] &= ~IQS7222_SLDR_SETUP_2_RES_MASK; 2079e505edaeSJeff LaBundy sldr_setup[2] |= (val / 16 << 2080e505edaeSJeff LaBundy IQS7222_SLDR_SETUP_2_RES_SHIFT); 2081e505edaeSJeff LaBundy } 2082e505edaeSJeff LaBundy } 2083e505edaeSJeff LaBundy 2084e505edaeSJeff LaBundy if (!fwnode_property_read_u32(sldr_node, "azoteq,top-speed", &val)) { 2085e505edaeSJeff LaBundy if (val > (reg_offset ? U16_MAX : U8_MAX * 4)) { 2086e505edaeSJeff LaBundy dev_err(&client->dev, "Invalid %s top speed: %u\n", 2087e505edaeSJeff LaBundy fwnode_get_name(sldr_node), val); 2088e505edaeSJeff LaBundy return -EINVAL; 2089e505edaeSJeff LaBundy } 2090e505edaeSJeff LaBundy 2091e505edaeSJeff LaBundy if (reg_offset) { 2092e505edaeSJeff LaBundy sldr_setup[2] = val; 2093e505edaeSJeff LaBundy } else { 2094e505edaeSJeff LaBundy sldr_setup[2] &= ~IQS7222_SLDR_SETUP_2_TOP_SPEED_MASK; 2095e505edaeSJeff LaBundy sldr_setup[2] |= (val / 4); 2096e505edaeSJeff LaBundy } 2097e505edaeSJeff LaBundy } 2098e505edaeSJeff LaBundy 2099e505edaeSJeff LaBundy if (!fwnode_property_read_u32(sldr_node, "linux,axis", &val)) { 2100e505edaeSJeff LaBundy u16 sldr_max = sldr_setup[3] - 1; 2101e505edaeSJeff LaBundy 2102e505edaeSJeff LaBundy if (!reg_offset) { 2103e505edaeSJeff LaBundy sldr_max = sldr_setup[2]; 2104e505edaeSJeff LaBundy 2105e505edaeSJeff LaBundy sldr_max &= IQS7222_SLDR_SETUP_2_RES_MASK; 2106e505edaeSJeff LaBundy sldr_max >>= IQS7222_SLDR_SETUP_2_RES_SHIFT; 2107e505edaeSJeff LaBundy 2108e505edaeSJeff LaBundy sldr_max = sldr_max * 16 - 1; 2109e505edaeSJeff LaBundy } 2110e505edaeSJeff LaBundy 2111e505edaeSJeff LaBundy input_set_abs_params(iqs7222->keypad, val, 0, sldr_max, 0, 0); 2112e505edaeSJeff LaBundy iqs7222->sl_axis[sldr_index] = val; 2113e505edaeSJeff LaBundy } 2114e505edaeSJeff LaBundy 2115e505edaeSJeff LaBundy if (dev_desc->wheel_enable) { 2116e505edaeSJeff LaBundy sldr_setup[0] &= ~dev_desc->wheel_enable; 2117e505edaeSJeff LaBundy if (iqs7222->sl_axis[sldr_index] == ABS_WHEEL) 2118e505edaeSJeff LaBundy sldr_setup[0] |= dev_desc->wheel_enable; 2119e505edaeSJeff LaBundy } 2120e505edaeSJeff LaBundy 212156a0c54cSJeff LaBundy /* 212256a0c54cSJeff LaBundy * The absence of a register offset makes it safe to assume the device 212356a0c54cSJeff LaBundy * supports gestures, each of which is first disabled until explicitly 212456a0c54cSJeff LaBundy * enabled. 212556a0c54cSJeff LaBundy */ 212656a0c54cSJeff LaBundy if (!reg_offset) 212756a0c54cSJeff LaBundy for (i = 0; i < ARRAY_SIZE(iqs7222_sl_events); i++) 212856a0c54cSJeff LaBundy sldr_setup[9] &= ~iqs7222_sl_events[i].enable; 212956a0c54cSJeff LaBundy 2130e505edaeSJeff LaBundy for (i = 0; i < ARRAY_SIZE(iqs7222_sl_events); i++) { 2131e505edaeSJeff LaBundy const char *event_name = iqs7222_sl_events[i].name; 2132e505edaeSJeff LaBundy struct fwnode_handle *event_node; 2133e505edaeSJeff LaBundy 2134e505edaeSJeff LaBundy event_node = fwnode_get_named_child_node(sldr_node, event_name); 2135e505edaeSJeff LaBundy if (!event_node) 2136e505edaeSJeff LaBundy continue; 2137e505edaeSJeff LaBundy 2138e505edaeSJeff LaBundy error = iqs7222_parse_props(iqs7222, &event_node, sldr_index, 2139e505edaeSJeff LaBundy IQS7222_REG_GRP_SLDR, 2140e505edaeSJeff LaBundy reg_offset ? 2141e505edaeSJeff LaBundy IQS7222_REG_KEY_RESERVED : 2142e505edaeSJeff LaBundy iqs7222_sl_events[i].reg_key); 2143e505edaeSJeff LaBundy if (error) 2144e505edaeSJeff LaBundy return error; 2145e505edaeSJeff LaBundy 214695215d3dSJeff LaBundy /* 214795215d3dSJeff LaBundy * The press/release event does not expose a direct GPIO link, 214895215d3dSJeff LaBundy * but one can be emulated by tying each of the participating 214995215d3dSJeff LaBundy * channels to the same GPIO. 215095215d3dSJeff LaBundy */ 215195215d3dSJeff LaBundy error = iqs7222_gpio_select(iqs7222, event_node, 215295215d3dSJeff LaBundy i ? iqs7222_sl_events[i].enable 215395215d3dSJeff LaBundy : sldr_setup[3 + reg_offset], 215495215d3dSJeff LaBundy i ? 1568 + sldr_index * 30 215595215d3dSJeff LaBundy : sldr_setup[4 + reg_offset]); 215695215d3dSJeff LaBundy if (error) 215795215d3dSJeff LaBundy return error; 215895215d3dSJeff LaBundy 215995215d3dSJeff LaBundy if (!reg_offset) 216095215d3dSJeff LaBundy sldr_setup[9] |= iqs7222_sl_events[i].enable; 216195215d3dSJeff LaBundy 2162e505edaeSJeff LaBundy error = fwnode_property_read_u32(event_node, "linux,code", 2163e505edaeSJeff LaBundy &val); 2164e505edaeSJeff LaBundy if (error) { 2165e505edaeSJeff LaBundy dev_err(&client->dev, "Failed to read %s code: %d\n", 2166e505edaeSJeff LaBundy fwnode_get_name(sldr_node), error); 2167e505edaeSJeff LaBundy return error; 2168e505edaeSJeff LaBundy } 2169e505edaeSJeff LaBundy 2170e505edaeSJeff LaBundy iqs7222->sl_code[sldr_index][i] = val; 2171e505edaeSJeff LaBundy input_set_capability(iqs7222->keypad, EV_KEY, val); 2172e505edaeSJeff LaBundy 2173e505edaeSJeff LaBundy if (!dev_desc->event_offset) 2174e505edaeSJeff LaBundy continue; 2175e505edaeSJeff LaBundy 217695215d3dSJeff LaBundy /* 217795215d3dSJeff LaBundy * The press/release event is determined based on whether the 217895215d3dSJeff LaBundy * coordinate field reports 0xFFFF and solely relies on touch 217995215d3dSJeff LaBundy * or proximity interrupts to be unmasked. 218095215d3dSJeff LaBundy */ 218195215d3dSJeff LaBundy if (i && !reg_offset) 218295215d3dSJeff LaBundy *event_mask |= (IQS7222_EVENT_MASK_SLDR << sldr_index); 218395215d3dSJeff LaBundy else if (sldr_setup[4 + reg_offset] == dev_desc->touch_link) 218495215d3dSJeff LaBundy *event_mask |= IQS7222_EVENT_MASK_TOUCH; 218595215d3dSJeff LaBundy else 218695215d3dSJeff LaBundy *event_mask |= IQS7222_EVENT_MASK_PROX; 2187e505edaeSJeff LaBundy } 2188e505edaeSJeff LaBundy 2189e505edaeSJeff LaBundy /* 2190e505edaeSJeff LaBundy * The following call handles a special pair of properties that shift 2191e505edaeSJeff LaBundy * to make room for a wheel enable control in the case of IQS7222C. 2192e505edaeSJeff LaBundy */ 2193e505edaeSJeff LaBundy return iqs7222_parse_props(iqs7222, &sldr_node, sldr_index, 2194e505edaeSJeff LaBundy IQS7222_REG_GRP_SLDR, 2195e505edaeSJeff LaBundy dev_desc->wheel_enable ? 2196e505edaeSJeff LaBundy IQS7222_REG_KEY_WHEEL : 2197e505edaeSJeff LaBundy IQS7222_REG_KEY_NO_WHEEL); 2198e505edaeSJeff LaBundy } 2199e505edaeSJeff LaBundy 2200e505edaeSJeff LaBundy static int iqs7222_parse_all(struct iqs7222_private *iqs7222) 2201e505edaeSJeff LaBundy { 2202e505edaeSJeff LaBundy const struct iqs7222_dev_desc *dev_desc = iqs7222->dev_desc; 2203e505edaeSJeff LaBundy const struct iqs7222_reg_grp_desc *reg_grps = dev_desc->reg_grps; 2204e505edaeSJeff LaBundy u16 *sys_setup = iqs7222->sys_setup; 2205e505edaeSJeff LaBundy int error, i; 2206e505edaeSJeff LaBundy 2207*d56111edSJeff LaBundy if (dev_desc->allow_offset) 2208*d56111edSJeff LaBundy sys_setup[dev_desc->allow_offset] = U16_MAX; 2209*d56111edSJeff LaBundy 2210e505edaeSJeff LaBundy if (dev_desc->event_offset) 2211e505edaeSJeff LaBundy sys_setup[dev_desc->event_offset] = IQS7222_EVENT_MASK_ATI; 2212e505edaeSJeff LaBundy 2213e505edaeSJeff LaBundy for (i = 0; i < reg_grps[IQS7222_REG_GRP_CYCLE].num_row; i++) { 2214e505edaeSJeff LaBundy error = iqs7222_parse_cycle(iqs7222, i); 2215e505edaeSJeff LaBundy if (error) 2216e505edaeSJeff LaBundy return error; 2217e505edaeSJeff LaBundy } 2218e505edaeSJeff LaBundy 2219e505edaeSJeff LaBundy error = iqs7222_parse_props(iqs7222, NULL, 0, IQS7222_REG_GRP_GLBL, 2220e505edaeSJeff LaBundy IQS7222_REG_KEY_NONE); 2221e505edaeSJeff LaBundy if (error) 2222e505edaeSJeff LaBundy return error; 2223e505edaeSJeff LaBundy 2224e505edaeSJeff LaBundy for (i = 0; i < reg_grps[IQS7222_REG_GRP_GPIO].num_row; i++) { 2225e505edaeSJeff LaBundy struct fwnode_handle *gpio_node = NULL; 2226e505edaeSJeff LaBundy u16 *gpio_setup = iqs7222->gpio_setup[i]; 2227e505edaeSJeff LaBundy int j; 2228e505edaeSJeff LaBundy 2229e505edaeSJeff LaBundy gpio_setup[0] &= ~IQS7222_GPIO_SETUP_0_GPIO_EN; 2230e505edaeSJeff LaBundy gpio_setup[1] = 0; 2231e505edaeSJeff LaBundy gpio_setup[2] = 0; 2232e505edaeSJeff LaBundy 2233e505edaeSJeff LaBundy error = iqs7222_parse_props(iqs7222, &gpio_node, i, 2234e505edaeSJeff LaBundy IQS7222_REG_GRP_GPIO, 2235e505edaeSJeff LaBundy IQS7222_REG_KEY_NONE); 2236e505edaeSJeff LaBundy if (error) 2237e505edaeSJeff LaBundy return error; 2238e505edaeSJeff LaBundy 2239e505edaeSJeff LaBundy if (reg_grps[IQS7222_REG_GRP_GPIO].num_row == 1) 2240e505edaeSJeff LaBundy continue; 2241e505edaeSJeff LaBundy 2242e505edaeSJeff LaBundy /* 2243e505edaeSJeff LaBundy * The IQS7222C exposes multiple GPIO and must be informed 2244e505edaeSJeff LaBundy * as to which GPIO this group represents. 2245e505edaeSJeff LaBundy */ 2246e505edaeSJeff LaBundy for (j = 0; j < ARRAY_SIZE(iqs7222_gpio_links); j++) 2247e505edaeSJeff LaBundy gpio_setup[0] &= ~BIT(iqs7222_gpio_links[j]); 2248e505edaeSJeff LaBundy 2249e505edaeSJeff LaBundy gpio_setup[0] |= BIT(iqs7222_gpio_links[i]); 2250e505edaeSJeff LaBundy } 2251e505edaeSJeff LaBundy 2252e505edaeSJeff LaBundy for (i = 0; i < reg_grps[IQS7222_REG_GRP_CHAN].num_row; i++) { 2253e505edaeSJeff LaBundy u16 *chan_setup = iqs7222->chan_setup[i]; 2254e505edaeSJeff LaBundy 2255e505edaeSJeff LaBundy chan_setup[0] &= ~IQS7222_CHAN_SETUP_0_REF_MODE_MASK; 2256e505edaeSJeff LaBundy chan_setup[0] &= ~IQS7222_CHAN_SETUP_0_CHAN_EN; 2257e505edaeSJeff LaBundy 2258e505edaeSJeff LaBundy chan_setup[5] = 0; 2259e505edaeSJeff LaBundy } 2260e505edaeSJeff LaBundy 2261e505edaeSJeff LaBundy for (i = 0; i < reg_grps[IQS7222_REG_GRP_CHAN].num_row; i++) { 2262e505edaeSJeff LaBundy error = iqs7222_parse_chan(iqs7222, i); 2263e505edaeSJeff LaBundy if (error) 2264e505edaeSJeff LaBundy return error; 2265e505edaeSJeff LaBundy } 2266e505edaeSJeff LaBundy 2267e505edaeSJeff LaBundy error = iqs7222_parse_props(iqs7222, NULL, 0, IQS7222_REG_GRP_FILT, 2268e505edaeSJeff LaBundy IQS7222_REG_KEY_NONE); 2269e505edaeSJeff LaBundy if (error) 2270e505edaeSJeff LaBundy return error; 2271e505edaeSJeff LaBundy 2272e505edaeSJeff LaBundy for (i = 0; i < reg_grps[IQS7222_REG_GRP_SLDR].num_row; i++) { 2273e505edaeSJeff LaBundy u16 *sldr_setup = iqs7222->sldr_setup[i]; 2274e505edaeSJeff LaBundy 2275e505edaeSJeff LaBundy sldr_setup[0] &= ~IQS7222_SLDR_SETUP_0_CHAN_CNT_MASK; 2276e505edaeSJeff LaBundy 2277e505edaeSJeff LaBundy error = iqs7222_parse_sldr(iqs7222, i); 2278e505edaeSJeff LaBundy if (error) 2279e505edaeSJeff LaBundy return error; 2280e505edaeSJeff LaBundy } 2281e505edaeSJeff LaBundy 2282e505edaeSJeff LaBundy return iqs7222_parse_props(iqs7222, NULL, 0, IQS7222_REG_GRP_SYS, 2283e505edaeSJeff LaBundy IQS7222_REG_KEY_NONE); 2284e505edaeSJeff LaBundy } 2285e505edaeSJeff LaBundy 2286e505edaeSJeff LaBundy static int iqs7222_report(struct iqs7222_private *iqs7222) 2287e505edaeSJeff LaBundy { 2288e505edaeSJeff LaBundy const struct iqs7222_dev_desc *dev_desc = iqs7222->dev_desc; 2289e505edaeSJeff LaBundy struct i2c_client *client = iqs7222->client; 2290e505edaeSJeff LaBundy int num_chan = dev_desc->reg_grps[IQS7222_REG_GRP_CHAN].num_row; 2291e505edaeSJeff LaBundy int num_stat = dev_desc->reg_grps[IQS7222_REG_GRP_STAT].num_col; 2292e505edaeSJeff LaBundy int error, i, j; 2293e505edaeSJeff LaBundy __le16 status[IQS7222_MAX_COLS_STAT]; 2294e505edaeSJeff LaBundy 2295e505edaeSJeff LaBundy error = iqs7222_read_burst(iqs7222, IQS7222_SYS_STATUS, status, 2296e505edaeSJeff LaBundy num_stat); 2297e505edaeSJeff LaBundy if (error) 2298e505edaeSJeff LaBundy return error; 2299e505edaeSJeff LaBundy 2300e505edaeSJeff LaBundy if (le16_to_cpu(status[0]) & IQS7222_SYS_STATUS_RESET) { 2301e505edaeSJeff LaBundy dev_err(&client->dev, "Unexpected device reset\n"); 2302e505edaeSJeff LaBundy return iqs7222_dev_init(iqs7222, WRITE); 2303e505edaeSJeff LaBundy } 2304e505edaeSJeff LaBundy 2305e505edaeSJeff LaBundy if (le16_to_cpu(status[0]) & IQS7222_SYS_STATUS_ATI_ERROR) { 2306e505edaeSJeff LaBundy dev_err(&client->dev, "Unexpected ATI error\n"); 2307e505edaeSJeff LaBundy return iqs7222_ati_trigger(iqs7222); 2308e505edaeSJeff LaBundy } 2309e505edaeSJeff LaBundy 2310e505edaeSJeff LaBundy if (le16_to_cpu(status[0]) & IQS7222_SYS_STATUS_ATI_ACTIVE) 2311e505edaeSJeff LaBundy return 0; 2312e505edaeSJeff LaBundy 2313e505edaeSJeff LaBundy for (i = 0; i < num_chan; i++) { 2314e505edaeSJeff LaBundy u16 *chan_setup = iqs7222->chan_setup[i]; 2315e505edaeSJeff LaBundy 2316e505edaeSJeff LaBundy if (!(chan_setup[0] & IQS7222_CHAN_SETUP_0_CHAN_EN)) 2317e505edaeSJeff LaBundy continue; 2318e505edaeSJeff LaBundy 2319e505edaeSJeff LaBundy for (j = 0; j < ARRAY_SIZE(iqs7222_kp_events); j++) { 2320e505edaeSJeff LaBundy /* 2321e505edaeSJeff LaBundy * Proximity state begins at offset 2 and spills into 2322e505edaeSJeff LaBundy * offset 3 for devices with more than 16 channels. 2323e505edaeSJeff LaBundy * 2324e505edaeSJeff LaBundy * Touch state begins at the first offset immediately 2325e505edaeSJeff LaBundy * following proximity state. 2326e505edaeSJeff LaBundy */ 2327e505edaeSJeff LaBundy int k = 2 + j * (num_chan > 16 ? 2 : 1); 2328e505edaeSJeff LaBundy u16 state = le16_to_cpu(status[k + i / 16]); 2329e505edaeSJeff LaBundy 2330514c13b1SJeff LaBundy if (!iqs7222->kp_type[i][j]) 2331514c13b1SJeff LaBundy continue; 2332514c13b1SJeff LaBundy 2333e505edaeSJeff LaBundy input_event(iqs7222->keypad, 2334e505edaeSJeff LaBundy iqs7222->kp_type[i][j], 2335e505edaeSJeff LaBundy iqs7222->kp_code[i][j], 2336e505edaeSJeff LaBundy !!(state & BIT(i % 16))); 2337e505edaeSJeff LaBundy } 2338e505edaeSJeff LaBundy } 2339e505edaeSJeff LaBundy 2340e505edaeSJeff LaBundy for (i = 0; i < dev_desc->reg_grps[IQS7222_REG_GRP_SLDR].num_row; i++) { 2341e505edaeSJeff LaBundy u16 *sldr_setup = iqs7222->sldr_setup[i]; 2342e505edaeSJeff LaBundy u16 sldr_pos = le16_to_cpu(status[4 + i]); 2343e505edaeSJeff LaBundy u16 state = le16_to_cpu(status[6 + i]); 2344e505edaeSJeff LaBundy 2345e505edaeSJeff LaBundy if (!(sldr_setup[0] & IQS7222_SLDR_SETUP_0_CHAN_CNT_MASK)) 2346e505edaeSJeff LaBundy continue; 2347e505edaeSJeff LaBundy 2348e505edaeSJeff LaBundy if (sldr_pos < dev_desc->sldr_res) 2349e505edaeSJeff LaBundy input_report_abs(iqs7222->keypad, iqs7222->sl_axis[i], 2350e505edaeSJeff LaBundy sldr_pos); 2351e505edaeSJeff LaBundy 235295215d3dSJeff LaBundy input_report_key(iqs7222->keypad, iqs7222->sl_code[i][0], 2353e505edaeSJeff LaBundy sldr_pos < dev_desc->sldr_res); 2354e505edaeSJeff LaBundy 2355e505edaeSJeff LaBundy /* 235695215d3dSJeff LaBundy * A maximum resolution indicates the device does not support 235795215d3dSJeff LaBundy * gestures, in which case the remaining fields are ignored. 2358e505edaeSJeff LaBundy */ 235995215d3dSJeff LaBundy if (dev_desc->sldr_res == U16_MAX) 2360e505edaeSJeff LaBundy continue; 2361e505edaeSJeff LaBundy 236295215d3dSJeff LaBundy if (!(le16_to_cpu(status[1]) & IQS7222_EVENT_MASK_SLDR << i)) 236395215d3dSJeff LaBundy continue; 236495215d3dSJeff LaBundy 236595215d3dSJeff LaBundy /* 236695215d3dSJeff LaBundy * Skip the press/release event, as it does not have separate 236795215d3dSJeff LaBundy * status fields and is handled separately. 236895215d3dSJeff LaBundy */ 236995215d3dSJeff LaBundy for (j = 1; j < ARRAY_SIZE(iqs7222_sl_events); j++) { 237095215d3dSJeff LaBundy u16 mask = iqs7222_sl_events[j].mask; 237195215d3dSJeff LaBundy u16 val = iqs7222_sl_events[j].val; 237295215d3dSJeff LaBundy 2373e505edaeSJeff LaBundy input_report_key(iqs7222->keypad, 2374e505edaeSJeff LaBundy iqs7222->sl_code[i][j], 2375e505edaeSJeff LaBundy (state & mask) == val); 2376e505edaeSJeff LaBundy } 237795215d3dSJeff LaBundy 237895215d3dSJeff LaBundy input_sync(iqs7222->keypad); 237995215d3dSJeff LaBundy 238095215d3dSJeff LaBundy for (j = 1; j < ARRAY_SIZE(iqs7222_sl_events); j++) 238195215d3dSJeff LaBundy input_report_key(iqs7222->keypad, 238295215d3dSJeff LaBundy iqs7222->sl_code[i][j], 0); 2383e505edaeSJeff LaBundy } 2384e505edaeSJeff LaBundy 2385e505edaeSJeff LaBundy input_sync(iqs7222->keypad); 2386e505edaeSJeff LaBundy 2387e505edaeSJeff LaBundy return 0; 2388e505edaeSJeff LaBundy } 2389e505edaeSJeff LaBundy 2390e505edaeSJeff LaBundy static irqreturn_t iqs7222_irq(int irq, void *context) 2391e505edaeSJeff LaBundy { 2392e505edaeSJeff LaBundy struct iqs7222_private *iqs7222 = context; 2393e505edaeSJeff LaBundy 2394e505edaeSJeff LaBundy return iqs7222_report(iqs7222) ? IRQ_NONE : IRQ_HANDLED; 2395e505edaeSJeff LaBundy } 2396e505edaeSJeff LaBundy 2397e505edaeSJeff LaBundy static int iqs7222_probe(struct i2c_client *client) 2398e505edaeSJeff LaBundy { 2399e505edaeSJeff LaBundy struct iqs7222_private *iqs7222; 2400e505edaeSJeff LaBundy unsigned long irq_flags; 2401e505edaeSJeff LaBundy int error, irq; 2402e505edaeSJeff LaBundy 2403e505edaeSJeff LaBundy iqs7222 = devm_kzalloc(&client->dev, sizeof(*iqs7222), GFP_KERNEL); 2404e505edaeSJeff LaBundy if (!iqs7222) 2405e505edaeSJeff LaBundy return -ENOMEM; 2406e505edaeSJeff LaBundy 2407e505edaeSJeff LaBundy i2c_set_clientdata(client, iqs7222); 2408e505edaeSJeff LaBundy iqs7222->client = client; 2409e505edaeSJeff LaBundy 2410e505edaeSJeff LaBundy iqs7222->keypad = devm_input_allocate_device(&client->dev); 2411e505edaeSJeff LaBundy if (!iqs7222->keypad) 2412e505edaeSJeff LaBundy return -ENOMEM; 2413e505edaeSJeff LaBundy 2414e505edaeSJeff LaBundy iqs7222->keypad->name = client->name; 2415e505edaeSJeff LaBundy iqs7222->keypad->id.bustype = BUS_I2C; 2416e505edaeSJeff LaBundy 2417e505edaeSJeff LaBundy /* 2418e505edaeSJeff LaBundy * The RDY pin behaves as an interrupt, but must also be polled ahead 2419e505edaeSJeff LaBundy * of unsolicited I2C communication. As such, it is first opened as a 2420e505edaeSJeff LaBundy * GPIO and then passed to gpiod_to_irq() to register the interrupt. 2421e505edaeSJeff LaBundy */ 2422e505edaeSJeff LaBundy iqs7222->irq_gpio = devm_gpiod_get(&client->dev, "irq", GPIOD_IN); 2423e505edaeSJeff LaBundy if (IS_ERR(iqs7222->irq_gpio)) { 2424e505edaeSJeff LaBundy error = PTR_ERR(iqs7222->irq_gpio); 2425e505edaeSJeff LaBundy dev_err(&client->dev, "Failed to request IRQ GPIO: %d\n", 2426e505edaeSJeff LaBundy error); 2427e505edaeSJeff LaBundy return error; 2428e505edaeSJeff LaBundy } 2429e505edaeSJeff LaBundy 2430e505edaeSJeff LaBundy iqs7222->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", 2431e505edaeSJeff LaBundy GPIOD_OUT_HIGH); 2432e505edaeSJeff LaBundy if (IS_ERR(iqs7222->reset_gpio)) { 2433e505edaeSJeff LaBundy error = PTR_ERR(iqs7222->reset_gpio); 2434e505edaeSJeff LaBundy dev_err(&client->dev, "Failed to request reset GPIO: %d\n", 2435e505edaeSJeff LaBundy error); 2436e505edaeSJeff LaBundy return error; 2437e505edaeSJeff LaBundy } 2438e505edaeSJeff LaBundy 2439e505edaeSJeff LaBundy error = iqs7222_hard_reset(iqs7222); 2440e505edaeSJeff LaBundy if (error) 2441e505edaeSJeff LaBundy return error; 2442e505edaeSJeff LaBundy 2443e505edaeSJeff LaBundy error = iqs7222_dev_info(iqs7222); 2444e505edaeSJeff LaBundy if (error) 2445e505edaeSJeff LaBundy return error; 2446e505edaeSJeff LaBundy 2447e505edaeSJeff LaBundy error = iqs7222_dev_init(iqs7222, READ); 2448e505edaeSJeff LaBundy if (error) 2449e505edaeSJeff LaBundy return error; 2450e505edaeSJeff LaBundy 2451e505edaeSJeff LaBundy error = iqs7222_parse_all(iqs7222); 2452e505edaeSJeff LaBundy if (error) 2453e505edaeSJeff LaBundy return error; 2454e505edaeSJeff LaBundy 2455e505edaeSJeff LaBundy error = iqs7222_dev_init(iqs7222, WRITE); 2456e505edaeSJeff LaBundy if (error) 2457e505edaeSJeff LaBundy return error; 2458e505edaeSJeff LaBundy 2459e505edaeSJeff LaBundy error = iqs7222_report(iqs7222); 2460e505edaeSJeff LaBundy if (error) 2461e505edaeSJeff LaBundy return error; 2462e505edaeSJeff LaBundy 2463e505edaeSJeff LaBundy error = input_register_device(iqs7222->keypad); 2464e505edaeSJeff LaBundy if (error) { 2465e505edaeSJeff LaBundy dev_err(&client->dev, "Failed to register device: %d\n", error); 2466e505edaeSJeff LaBundy return error; 2467e505edaeSJeff LaBundy } 2468e505edaeSJeff LaBundy 2469e505edaeSJeff LaBundy irq = gpiod_to_irq(iqs7222->irq_gpio); 2470e505edaeSJeff LaBundy if (irq < 0) 2471e505edaeSJeff LaBundy return irq; 2472e505edaeSJeff LaBundy 2473e505edaeSJeff LaBundy irq_flags = gpiod_is_active_low(iqs7222->irq_gpio) ? IRQF_TRIGGER_LOW 2474e505edaeSJeff LaBundy : IRQF_TRIGGER_HIGH; 2475e505edaeSJeff LaBundy irq_flags |= IRQF_ONESHOT; 2476e505edaeSJeff LaBundy 2477e505edaeSJeff LaBundy error = devm_request_threaded_irq(&client->dev, irq, NULL, iqs7222_irq, 2478e505edaeSJeff LaBundy irq_flags, client->name, iqs7222); 2479e505edaeSJeff LaBundy if (error) 2480e505edaeSJeff LaBundy dev_err(&client->dev, "Failed to request IRQ: %d\n", error); 2481e505edaeSJeff LaBundy 2482e505edaeSJeff LaBundy return error; 2483e505edaeSJeff LaBundy } 2484e505edaeSJeff LaBundy 2485e505edaeSJeff LaBundy static const struct of_device_id iqs7222_of_match[] = { 2486e505edaeSJeff LaBundy { .compatible = "azoteq,iqs7222a" }, 2487e505edaeSJeff LaBundy { .compatible = "azoteq,iqs7222b" }, 2488e505edaeSJeff LaBundy { .compatible = "azoteq,iqs7222c" }, 2489e505edaeSJeff LaBundy { } 2490e505edaeSJeff LaBundy }; 2491e505edaeSJeff LaBundy MODULE_DEVICE_TABLE(of, iqs7222_of_match); 2492e505edaeSJeff LaBundy 2493e505edaeSJeff LaBundy static struct i2c_driver iqs7222_i2c_driver = { 2494e505edaeSJeff LaBundy .driver = { 2495e505edaeSJeff LaBundy .name = "iqs7222", 2496e505edaeSJeff LaBundy .of_match_table = iqs7222_of_match, 2497e505edaeSJeff LaBundy }, 2498e505edaeSJeff LaBundy .probe_new = iqs7222_probe, 2499e505edaeSJeff LaBundy }; 2500e505edaeSJeff LaBundy module_i2c_driver(iqs7222_i2c_driver); 2501e505edaeSJeff LaBundy 2502e505edaeSJeff LaBundy MODULE_AUTHOR("Jeff LaBundy <jeff@labundy.com>"); 2503e505edaeSJeff LaBundy MODULE_DESCRIPTION("Azoteq IQS7222A/B/C Capacitive Touch Controller"); 2504e505edaeSJeff LaBundy MODULE_LICENSE("GPL"); 2505