1e4ee831fSMark Brown /* 2e4ee831fSMark Brown * wm831x-dcdc.c -- DC-DC buck convertor driver for the WM831x series 3e4ee831fSMark Brown * 4e4ee831fSMark Brown * Copyright 2009 Wolfson Microelectronics PLC. 5e4ee831fSMark Brown * 6e4ee831fSMark Brown * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 7e4ee831fSMark Brown * 8e4ee831fSMark Brown * This program is free software; you can redistribute it and/or modify it 9e4ee831fSMark Brown * under the terms of the GNU General Public License as published by the 10e4ee831fSMark Brown * Free Software Foundation; either version 2 of the License, or (at your 11e4ee831fSMark Brown * option) any later version. 12e4ee831fSMark Brown */ 13e4ee831fSMark Brown 14e4ee831fSMark Brown #include <linux/module.h> 15e4ee831fSMark Brown #include <linux/moduleparam.h> 16e4ee831fSMark Brown #include <linux/init.h> 17e4ee831fSMark Brown #include <linux/bitops.h> 18e4ee831fSMark Brown #include <linux/err.h> 19e4ee831fSMark Brown #include <linux/i2c.h> 20e4ee831fSMark Brown #include <linux/platform_device.h> 21e4ee831fSMark Brown #include <linux/regulator/driver.h> 22e24a04c4SMark Brown #include <linux/regulator/machine.h> 23e24a04c4SMark Brown #include <linux/gpio.h> 245a0e3ad6STejun Heo #include <linux/slab.h> 25e4ee831fSMark Brown 26e4ee831fSMark Brown #include <linux/mfd/wm831x/core.h> 27e4ee831fSMark Brown #include <linux/mfd/wm831x/regulator.h> 28e4ee831fSMark Brown #include <linux/mfd/wm831x/pdata.h> 29e4ee831fSMark Brown 30e4ee831fSMark Brown #define WM831X_BUCKV_MAX_SELECTOR 0x68 31e4ee831fSMark Brown #define WM831X_BUCKP_MAX_SELECTOR 0x66 32e4ee831fSMark Brown 33e4ee831fSMark Brown #define WM831X_DCDC_MODE_FAST 0 34e4ee831fSMark Brown #define WM831X_DCDC_MODE_NORMAL 1 35e4ee831fSMark Brown #define WM831X_DCDC_MODE_IDLE 2 36e4ee831fSMark Brown #define WM831X_DCDC_MODE_STANDBY 3 37e4ee831fSMark Brown 3882caa978SMark Brown #define WM831X_DCDC_MAX_NAME 9 39e4ee831fSMark Brown 40e4ee831fSMark Brown /* Register offsets in control block */ 41e4ee831fSMark Brown #define WM831X_DCDC_CONTROL_1 0 42e4ee831fSMark Brown #define WM831X_DCDC_CONTROL_2 1 43e4ee831fSMark Brown #define WM831X_DCDC_ON_CONFIG 2 44e4ee831fSMark Brown #define WM831X_DCDC_SLEEP_CONTROL 3 45e24a04c4SMark Brown #define WM831X_DCDC_DVS_CONTROL 4 46e4ee831fSMark Brown 47e4ee831fSMark Brown /* 48e4ee831fSMark Brown * Shared 49e4ee831fSMark Brown */ 50e4ee831fSMark Brown 51e4ee831fSMark Brown struct wm831x_dcdc { 52e4ee831fSMark Brown char name[WM831X_DCDC_MAX_NAME]; 5382caa978SMark Brown char supply_name[WM831X_DCDC_MAX_NAME]; 54e4ee831fSMark Brown struct regulator_desc desc; 55e4ee831fSMark Brown int base; 56e4ee831fSMark Brown struct wm831x *wm831x; 57e4ee831fSMark Brown struct regulator_dev *regulator; 58e24a04c4SMark Brown int dvs_gpio; 59e24a04c4SMark Brown int dvs_gpio_state; 60e24a04c4SMark Brown int on_vsel; 61e24a04c4SMark Brown int dvs_vsel; 62e4ee831fSMark Brown }; 63e4ee831fSMark Brown 64e4ee831fSMark Brown static unsigned int wm831x_dcdc_get_mode(struct regulator_dev *rdev) 65e4ee831fSMark Brown 66e4ee831fSMark Brown { 67e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 68e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 69e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 70e4ee831fSMark Brown int val; 71e4ee831fSMark Brown 72e4ee831fSMark Brown val = wm831x_reg_read(wm831x, reg); 73e4ee831fSMark Brown if (val < 0) 74e4ee831fSMark Brown return val; 75e4ee831fSMark Brown 76e4ee831fSMark Brown val = (val & WM831X_DC1_ON_MODE_MASK) >> WM831X_DC1_ON_MODE_SHIFT; 77e4ee831fSMark Brown 78e4ee831fSMark Brown switch (val) { 79e4ee831fSMark Brown case WM831X_DCDC_MODE_FAST: 80e4ee831fSMark Brown return REGULATOR_MODE_FAST; 81e4ee831fSMark Brown case WM831X_DCDC_MODE_NORMAL: 82e4ee831fSMark Brown return REGULATOR_MODE_NORMAL; 83e4ee831fSMark Brown case WM831X_DCDC_MODE_STANDBY: 84e4ee831fSMark Brown return REGULATOR_MODE_STANDBY; 85e4ee831fSMark Brown case WM831X_DCDC_MODE_IDLE: 86e4ee831fSMark Brown return REGULATOR_MODE_IDLE; 87e4ee831fSMark Brown default: 88e4ee831fSMark Brown BUG(); 899ee291a4SMark Brown return -EINVAL; 90e4ee831fSMark Brown } 91e4ee831fSMark Brown } 92e4ee831fSMark Brown 93e4ee831fSMark Brown static int wm831x_dcdc_set_mode_int(struct wm831x *wm831x, int reg, 94e4ee831fSMark Brown unsigned int mode) 95e4ee831fSMark Brown { 96e4ee831fSMark Brown int val; 97e4ee831fSMark Brown 98e4ee831fSMark Brown switch (mode) { 99e4ee831fSMark Brown case REGULATOR_MODE_FAST: 100e4ee831fSMark Brown val = WM831X_DCDC_MODE_FAST; 101e4ee831fSMark Brown break; 102e4ee831fSMark Brown case REGULATOR_MODE_NORMAL: 103e4ee831fSMark Brown val = WM831X_DCDC_MODE_NORMAL; 104e4ee831fSMark Brown break; 105e4ee831fSMark Brown case REGULATOR_MODE_STANDBY: 106e4ee831fSMark Brown val = WM831X_DCDC_MODE_STANDBY; 107e4ee831fSMark Brown break; 108e4ee831fSMark Brown case REGULATOR_MODE_IDLE: 109e4ee831fSMark Brown val = WM831X_DCDC_MODE_IDLE; 110e4ee831fSMark Brown break; 111e4ee831fSMark Brown default: 112e4ee831fSMark Brown return -EINVAL; 113e4ee831fSMark Brown } 114e4ee831fSMark Brown 115e4ee831fSMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC1_ON_MODE_MASK, 116e4ee831fSMark Brown val << WM831X_DC1_ON_MODE_SHIFT); 117e4ee831fSMark Brown } 118e4ee831fSMark Brown 119e4ee831fSMark Brown static int wm831x_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode) 120e4ee831fSMark Brown { 121e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 122e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 123e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 124e4ee831fSMark Brown 125e4ee831fSMark Brown return wm831x_dcdc_set_mode_int(wm831x, reg, mode); 126e4ee831fSMark Brown } 127e4ee831fSMark Brown 128e4ee831fSMark Brown static int wm831x_dcdc_set_suspend_mode(struct regulator_dev *rdev, 129e4ee831fSMark Brown unsigned int mode) 130e4ee831fSMark Brown { 131e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 132e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 133e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 134e4ee831fSMark Brown 135e4ee831fSMark Brown return wm831x_dcdc_set_mode_int(wm831x, reg, mode); 136e4ee831fSMark Brown } 137e4ee831fSMark Brown 138e4ee831fSMark Brown static int wm831x_dcdc_get_status(struct regulator_dev *rdev) 139e4ee831fSMark Brown { 140e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 141e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 142e4ee831fSMark Brown int ret; 143e4ee831fSMark Brown 144e4ee831fSMark Brown /* First, check for errors */ 145e4ee831fSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); 146e4ee831fSMark Brown if (ret < 0) 147e4ee831fSMark Brown return ret; 148e4ee831fSMark Brown 149e4ee831fSMark Brown if (ret & (1 << rdev_get_id(rdev))) { 150e4ee831fSMark Brown dev_dbg(wm831x->dev, "DCDC%d under voltage\n", 151e4ee831fSMark Brown rdev_get_id(rdev) + 1); 152e4ee831fSMark Brown return REGULATOR_STATUS_ERROR; 153e4ee831fSMark Brown } 154e4ee831fSMark Brown 155e4ee831fSMark Brown /* DCDC1 and DCDC2 can additionally detect high voltage/current */ 156e4ee831fSMark Brown if (rdev_get_id(rdev) < 2) { 157e4ee831fSMark Brown if (ret & (WM831X_DC1_OV_STS << rdev_get_id(rdev))) { 158e4ee831fSMark Brown dev_dbg(wm831x->dev, "DCDC%d over voltage\n", 159e4ee831fSMark Brown rdev_get_id(rdev) + 1); 160e4ee831fSMark Brown return REGULATOR_STATUS_ERROR; 161e4ee831fSMark Brown } 162e4ee831fSMark Brown 163e4ee831fSMark Brown if (ret & (WM831X_DC1_HC_STS << rdev_get_id(rdev))) { 164e4ee831fSMark Brown dev_dbg(wm831x->dev, "DCDC%d over current\n", 165e4ee831fSMark Brown rdev_get_id(rdev) + 1); 166e4ee831fSMark Brown return REGULATOR_STATUS_ERROR; 167e4ee831fSMark Brown } 168e4ee831fSMark Brown } 169e4ee831fSMark Brown 170e4ee831fSMark Brown /* Is the regulator on? */ 171e4ee831fSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); 172e4ee831fSMark Brown if (ret < 0) 173e4ee831fSMark Brown return ret; 174e4ee831fSMark Brown if (!(ret & (1 << rdev_get_id(rdev)))) 175e4ee831fSMark Brown return REGULATOR_STATUS_OFF; 176e4ee831fSMark Brown 177e4ee831fSMark Brown /* TODO: When we handle hardware control modes so we can report the 178e4ee831fSMark Brown * current mode. */ 179e4ee831fSMark Brown return REGULATOR_STATUS_ON; 180e4ee831fSMark Brown } 181e4ee831fSMark Brown 182e4ee831fSMark Brown static irqreturn_t wm831x_dcdc_uv_irq(int irq, void *data) 183e4ee831fSMark Brown { 184e4ee831fSMark Brown struct wm831x_dcdc *dcdc = data; 185e4ee831fSMark Brown 186e4ee831fSMark Brown regulator_notifier_call_chain(dcdc->regulator, 187e4ee831fSMark Brown REGULATOR_EVENT_UNDER_VOLTAGE, 188e4ee831fSMark Brown NULL); 189e4ee831fSMark Brown 190e4ee831fSMark Brown return IRQ_HANDLED; 191e4ee831fSMark Brown } 192e4ee831fSMark Brown 193e4ee831fSMark Brown static irqreturn_t wm831x_dcdc_oc_irq(int irq, void *data) 194e4ee831fSMark Brown { 195e4ee831fSMark Brown struct wm831x_dcdc *dcdc = data; 196e4ee831fSMark Brown 197e4ee831fSMark Brown regulator_notifier_call_chain(dcdc->regulator, 198e4ee831fSMark Brown REGULATOR_EVENT_OVER_CURRENT, 199e4ee831fSMark Brown NULL); 200e4ee831fSMark Brown 201e4ee831fSMark Brown return IRQ_HANDLED; 202e4ee831fSMark Brown } 203e4ee831fSMark Brown 204e4ee831fSMark Brown /* 205e4ee831fSMark Brown * BUCKV specifics 206e4ee831fSMark Brown */ 207e4ee831fSMark Brown 208e4ee831fSMark Brown static int wm831x_buckv_list_voltage(struct regulator_dev *rdev, 209e4ee831fSMark Brown unsigned selector) 210e4ee831fSMark Brown { 211e4ee831fSMark Brown if (selector <= 0x8) 212e4ee831fSMark Brown return 600000; 213e4ee831fSMark Brown if (selector <= WM831X_BUCKV_MAX_SELECTOR) 214e4ee831fSMark Brown return 600000 + ((selector - 0x8) * 12500); 215e4ee831fSMark Brown return -EINVAL; 216e4ee831fSMark Brown } 217e4ee831fSMark Brown 218b5fb77e0SAxel Lin static int wm831x_buckv_map_voltage(struct regulator_dev *rdev, 219e4ee831fSMark Brown int min_uV, int max_uV) 220e4ee831fSMark Brown { 221e4ee831fSMark Brown u16 vsel; 222e4ee831fSMark Brown 223e4ee831fSMark Brown if (min_uV < 600000) 224e4ee831fSMark Brown vsel = 0; 225e4ee831fSMark Brown else if (min_uV <= 1800000) 2261a679930SAxel Lin vsel = DIV_ROUND_UP(min_uV - 600000, 12500) + 8; 227e4ee831fSMark Brown else 228e4ee831fSMark Brown return -EINVAL; 229e4ee831fSMark Brown 230e4ee831fSMark Brown if (wm831x_buckv_list_voltage(rdev, vsel) > max_uV) 231e4ee831fSMark Brown return -EINVAL; 232e4ee831fSMark Brown 233e24a04c4SMark Brown return vsel; 234e24a04c4SMark Brown } 235e24a04c4SMark Brown 236e24a04c4SMark Brown static int wm831x_buckv_set_dvs(struct regulator_dev *rdev, int state) 237e24a04c4SMark Brown { 238e24a04c4SMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 239e24a04c4SMark Brown 240e24a04c4SMark Brown if (state == dcdc->dvs_gpio_state) 241e24a04c4SMark Brown return 0; 242e24a04c4SMark Brown 243e24a04c4SMark Brown dcdc->dvs_gpio_state = state; 244e24a04c4SMark Brown gpio_set_value(dcdc->dvs_gpio, state); 245e24a04c4SMark Brown 246e24a04c4SMark Brown /* Should wait for DVS state change to be asserted if we have 247e24a04c4SMark Brown * a GPIO for it, for now assume the device is configured 248e24a04c4SMark Brown * for the fastest possible transition. 249e24a04c4SMark Brown */ 250e24a04c4SMark Brown 251e24a04c4SMark Brown return 0; 252e4ee831fSMark Brown } 253e4ee831fSMark Brown 254b5fb77e0SAxel Lin static int wm831x_buckv_set_voltage_sel(struct regulator_dev *rdev, 255b5fb77e0SAxel Lin unsigned vsel) 256e4ee831fSMark Brown { 257e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 258e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 259e24a04c4SMark Brown int on_reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 260e24a04c4SMark Brown int dvs_reg = dcdc->base + WM831X_DCDC_DVS_CONTROL; 261b5fb77e0SAxel Lin int ret; 2623a93f2a9SMark Brown 263e24a04c4SMark Brown /* If this value is already set then do a GPIO update if we can */ 264e24a04c4SMark Brown if (dcdc->dvs_gpio && dcdc->on_vsel == vsel) 265e24a04c4SMark Brown return wm831x_buckv_set_dvs(rdev, 0); 266e24a04c4SMark Brown 267e24a04c4SMark Brown if (dcdc->dvs_gpio && dcdc->dvs_vsel == vsel) 268e24a04c4SMark Brown return wm831x_buckv_set_dvs(rdev, 1); 269e24a04c4SMark Brown 270e24a04c4SMark Brown /* Always set the ON status to the minimum voltage */ 271e24a04c4SMark Brown ret = wm831x_set_bits(wm831x, on_reg, WM831X_DC1_ON_VSEL_MASK, vsel); 272e24a04c4SMark Brown if (ret < 0) 273e24a04c4SMark Brown return ret; 274e24a04c4SMark Brown dcdc->on_vsel = vsel; 275e24a04c4SMark Brown 276e24a04c4SMark Brown if (!dcdc->dvs_gpio) 277e24a04c4SMark Brown return ret; 278e24a04c4SMark Brown 279e24a04c4SMark Brown /* Kick the voltage transition now */ 280e24a04c4SMark Brown ret = wm831x_buckv_set_dvs(rdev, 0); 281e24a04c4SMark Brown if (ret < 0) 282e24a04c4SMark Brown return ret; 283e24a04c4SMark Brown 28488cda60eSMark Brown /* 28588cda60eSMark Brown * If this VSEL is higher than the last one we've seen then 28688cda60eSMark Brown * remember it as the DVS VSEL. This is optimised for CPUfreq 28788cda60eSMark Brown * usage where we want to get to the highest voltage very 28888cda60eSMark Brown * quickly. 28988cda60eSMark Brown */ 29088cda60eSMark Brown if (vsel > dcdc->dvs_vsel) { 29188cda60eSMark Brown ret = wm831x_set_bits(wm831x, dvs_reg, 29288cda60eSMark Brown WM831X_DC1_DVS_VSEL_MASK, 29313ae633cSMark Brown vsel); 294e24a04c4SMark Brown if (ret == 0) 295e24a04c4SMark Brown dcdc->dvs_vsel = vsel; 296e24a04c4SMark Brown else 29788cda60eSMark Brown dev_warn(wm831x->dev, 29888cda60eSMark Brown "Failed to set DCDC DVS VSEL: %d\n", ret); 29988cda60eSMark Brown } 300e24a04c4SMark Brown 301e24a04c4SMark Brown return 0; 302e4ee831fSMark Brown } 303e4ee831fSMark Brown 304e4ee831fSMark Brown static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev, 305e4ee831fSMark Brown int uV) 306e4ee831fSMark Brown { 307e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 308e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 309e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 310e24a04c4SMark Brown int vsel; 311e4ee831fSMark Brown 312b5fb77e0SAxel Lin vsel = wm831x_buckv_map_voltage(rdev, uV, uV); 313e24a04c4SMark Brown if (vsel < 0) 314e24a04c4SMark Brown return vsel; 315e24a04c4SMark Brown 316e24a04c4SMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC1_SLP_VSEL_MASK, vsel); 317e4ee831fSMark Brown } 318e4ee831fSMark Brown 319afb8bb80SMark Brown static int wm831x_buckv_get_voltage_sel(struct regulator_dev *rdev) 320e4ee831fSMark Brown { 321e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 322e4ee831fSMark Brown 323e24a04c4SMark Brown if (dcdc->dvs_gpio && dcdc->dvs_gpio_state) 324afb8bb80SMark Brown return dcdc->dvs_vsel; 325e24a04c4SMark Brown else 326afb8bb80SMark Brown return dcdc->on_vsel; 327e4ee831fSMark Brown } 328e4ee831fSMark Brown 329e4ee831fSMark Brown /* Current limit options */ 330e4ee831fSMark Brown static u16 wm831x_dcdc_ilim[] = { 331e4ee831fSMark Brown 125, 250, 375, 500, 625, 750, 875, 1000 332e4ee831fSMark Brown }; 333e4ee831fSMark Brown 334e4ee831fSMark Brown static int wm831x_buckv_set_current_limit(struct regulator_dev *rdev, 335e4ee831fSMark Brown int min_uA, int max_uA) 336e4ee831fSMark Brown { 337e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 338e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 339e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; 340e4ee831fSMark Brown int i; 341e4ee831fSMark Brown 342422294deSAxel Lin for (i = ARRAY_SIZE(wm831x_dcdc_ilim) - 1; i >= 0; i--) { 343a171e782SAxel Lin if ((min_uA <= wm831x_dcdc_ilim[i]) && 344a171e782SAxel Lin (wm831x_dcdc_ilim[i] <= max_uA)) 345422294deSAxel Lin return wm831x_set_bits(wm831x, reg, 346422294deSAxel Lin WM831X_DC1_HC_THR_MASK, 34709bf14b9SAxel Lin i << WM831X_DC1_HC_THR_SHIFT); 348e4ee831fSMark Brown } 349e4ee831fSMark Brown 350422294deSAxel Lin return -EINVAL; 351422294deSAxel Lin } 352422294deSAxel Lin 353e4ee831fSMark Brown static int wm831x_buckv_get_current_limit(struct regulator_dev *rdev) 354e4ee831fSMark Brown { 355e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 356e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 357e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; 358e4ee831fSMark Brown int val; 359e4ee831fSMark Brown 360e4ee831fSMark Brown val = wm831x_reg_read(wm831x, reg); 361e4ee831fSMark Brown if (val < 0) 362e4ee831fSMark Brown return val; 363e4ee831fSMark Brown 36409bf14b9SAxel Lin val = (val & WM831X_DC1_HC_THR_MASK) >> WM831X_DC1_HC_THR_SHIFT; 36509bf14b9SAxel Lin return wm831x_dcdc_ilim[val]; 366e4ee831fSMark Brown } 367e4ee831fSMark Brown 368e4ee831fSMark Brown static struct regulator_ops wm831x_buckv_ops = { 369b5fb77e0SAxel Lin .set_voltage_sel = wm831x_buckv_set_voltage_sel, 370afb8bb80SMark Brown .get_voltage_sel = wm831x_buckv_get_voltage_sel, 371e4ee831fSMark Brown .list_voltage = wm831x_buckv_list_voltage, 372b5fb77e0SAxel Lin .map_voltage = wm831x_buckv_map_voltage, 373e4ee831fSMark Brown .set_suspend_voltage = wm831x_buckv_set_suspend_voltage, 374e4ee831fSMark Brown .set_current_limit = wm831x_buckv_set_current_limit, 375e4ee831fSMark Brown .get_current_limit = wm831x_buckv_get_current_limit, 376e4ee831fSMark Brown 3773d138fccSMark Brown .is_enabled = regulator_is_enabled_regmap, 3783d138fccSMark Brown .enable = regulator_enable_regmap, 3793d138fccSMark Brown .disable = regulator_disable_regmap, 380e4ee831fSMark Brown .get_status = wm831x_dcdc_get_status, 381e4ee831fSMark Brown .get_mode = wm831x_dcdc_get_mode, 382e4ee831fSMark Brown .set_mode = wm831x_dcdc_set_mode, 383e4ee831fSMark Brown .set_suspend_mode = wm831x_dcdc_set_suspend_mode, 384e4ee831fSMark Brown }; 385e4ee831fSMark Brown 386e24a04c4SMark Brown /* 387e24a04c4SMark Brown * Set up DVS control. We just log errors since we can still run 388e24a04c4SMark Brown * (with reduced performance) if we fail. 389e24a04c4SMark Brown */ 390a5023574SBill Pemberton static void wm831x_buckv_dvs_init(struct wm831x_dcdc *dcdc, 391e24a04c4SMark Brown struct wm831x_buckv_pdata *pdata) 392e24a04c4SMark Brown { 393e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 394e24a04c4SMark Brown int ret; 395e24a04c4SMark Brown u16 ctrl; 396e24a04c4SMark Brown 397e24a04c4SMark Brown if (!pdata || !pdata->dvs_gpio) 398e24a04c4SMark Brown return; 399e24a04c4SMark Brown 400e24a04c4SMark Brown /* gpiolib won't let us read the GPIO status so pick the higher 401e24a04c4SMark Brown * of the two existing voltages so we take it as platform data. 402e24a04c4SMark Brown */ 403e24a04c4SMark Brown dcdc->dvs_gpio_state = pdata->dvs_init_state; 404e24a04c4SMark Brown 405053fa1b7SMark Brown ret = gpio_request_one(pdata->dvs_gpio, 406053fa1b7SMark Brown dcdc->dvs_gpio_state ? GPIOF_INIT_HIGH : 0, 407053fa1b7SMark Brown "DCDC DVS"); 408e24a04c4SMark Brown if (ret < 0) { 409053fa1b7SMark Brown dev_err(wm831x->dev, "Failed to get %s DVS GPIO: %d\n", 410e24a04c4SMark Brown dcdc->name, ret); 411e24a04c4SMark Brown return; 412e24a04c4SMark Brown } 413e24a04c4SMark Brown 414e24a04c4SMark Brown dcdc->dvs_gpio = pdata->dvs_gpio; 415b47ba9fdSMark Brown 416b47ba9fdSMark Brown switch (pdata->dvs_control_src) { 417b47ba9fdSMark Brown case 1: 418b47ba9fdSMark Brown ctrl = 2 << WM831X_DC1_DVS_SRC_SHIFT; 419b47ba9fdSMark Brown break; 420b47ba9fdSMark Brown case 2: 421b47ba9fdSMark Brown ctrl = 3 << WM831X_DC1_DVS_SRC_SHIFT; 422b47ba9fdSMark Brown break; 423b47ba9fdSMark Brown default: 424b47ba9fdSMark Brown dev_err(wm831x->dev, "Invalid DVS control source %d for %s\n", 425b47ba9fdSMark Brown pdata->dvs_control_src, dcdc->name); 426b47ba9fdSMark Brown return; 427b47ba9fdSMark Brown } 428b47ba9fdSMark Brown 429c439b8f4SMark Brown /* If DVS_VSEL is set to the minimum value then raise it to ON_VSEL 430c439b8f4SMark Brown * to make bootstrapping a bit smoother. 431c439b8f4SMark Brown */ 432c439b8f4SMark Brown if (!dcdc->dvs_vsel) { 433c439b8f4SMark Brown ret = wm831x_set_bits(wm831x, 434c439b8f4SMark Brown dcdc->base + WM831X_DCDC_DVS_CONTROL, 435c439b8f4SMark Brown WM831X_DC1_DVS_VSEL_MASK, dcdc->on_vsel); 436c439b8f4SMark Brown if (ret == 0) 437c439b8f4SMark Brown dcdc->dvs_vsel = dcdc->on_vsel; 438c439b8f4SMark Brown else 439c439b8f4SMark Brown dev_warn(wm831x->dev, "Failed to set DVS_VSEL: %d\n", 440c439b8f4SMark Brown ret); 441c439b8f4SMark Brown } 442c439b8f4SMark Brown 443b47ba9fdSMark Brown ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL, 444b47ba9fdSMark Brown WM831X_DC1_DVS_SRC_MASK, ctrl); 445b47ba9fdSMark Brown if (ret < 0) { 446b47ba9fdSMark Brown dev_err(wm831x->dev, "Failed to set %s DVS source: %d\n", 447b47ba9fdSMark Brown dcdc->name, ret); 448b47ba9fdSMark Brown } 449e24a04c4SMark Brown } 450e24a04c4SMark Brown 451a5023574SBill Pemberton static int wm831x_buckv_probe(struct platform_device *pdev) 452e4ee831fSMark Brown { 453e4ee831fSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 454dff91d0bSJingoo Han struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev); 455c172708dSMark Brown struct regulator_config config = { }; 456137a6354SMark Brown int id; 457e4ee831fSMark Brown struct wm831x_dcdc *dcdc; 458e4ee831fSMark Brown struct resource *res; 459e4ee831fSMark Brown int ret, irq; 460e4ee831fSMark Brown 461137a6354SMark Brown if (pdata && pdata->wm831x_num) 462137a6354SMark Brown id = (pdata->wm831x_num * 10) + 1; 463137a6354SMark Brown else 464137a6354SMark Brown id = 0; 465137a6354SMark Brown id = pdev->id - id; 466137a6354SMark Brown 467e4ee831fSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 468e4ee831fSMark Brown 469fded2f4fSMark Brown dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), 470fded2f4fSMark Brown GFP_KERNEL); 471e4ee831fSMark Brown if (dcdc == NULL) { 472e4ee831fSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 473e4ee831fSMark Brown return -ENOMEM; 474e4ee831fSMark Brown } 475e4ee831fSMark Brown 476e4ee831fSMark Brown dcdc->wm831x = wm831x; 477e4ee831fSMark Brown 4785656098eSMark Brown res = platform_get_resource(pdev, IORESOURCE_REG, 0); 479e4ee831fSMark Brown if (res == NULL) { 4805656098eSMark Brown dev_err(&pdev->dev, "No REG resource\n"); 481e4ee831fSMark Brown ret = -EINVAL; 482e4ee831fSMark Brown goto err; 483e4ee831fSMark Brown } 484e4ee831fSMark Brown dcdc->base = res->start; 485e4ee831fSMark Brown 486e4ee831fSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 487e4ee831fSMark Brown dcdc->desc.name = dcdc->name; 48882caa978SMark Brown 48982caa978SMark Brown snprintf(dcdc->supply_name, sizeof(dcdc->supply_name), 49082caa978SMark Brown "DC%dVDD", id + 1); 49182caa978SMark Brown dcdc->desc.supply_name = dcdc->supply_name; 49282caa978SMark Brown 493e4ee831fSMark Brown dcdc->desc.id = id; 494e4ee831fSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 495e4ee831fSMark Brown dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1; 496e4ee831fSMark Brown dcdc->desc.ops = &wm831x_buckv_ops; 497e4ee831fSMark Brown dcdc->desc.owner = THIS_MODULE; 4983d138fccSMark Brown dcdc->desc.enable_reg = WM831X_DCDC_ENABLE; 4993d138fccSMark Brown dcdc->desc.enable_mask = 1 << id; 500e4ee831fSMark Brown 501e24a04c4SMark Brown ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG); 502e24a04c4SMark Brown if (ret < 0) { 503e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to read ON VSEL: %d\n", ret); 504e24a04c4SMark Brown goto err; 505e24a04c4SMark Brown } 506e24a04c4SMark Brown dcdc->on_vsel = ret & WM831X_DC1_ON_VSEL_MASK; 507e24a04c4SMark Brown 508a1b81dd3SMark Brown ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL); 509e24a04c4SMark Brown if (ret < 0) { 510e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to read DVS VSEL: %d\n", ret); 511e24a04c4SMark Brown goto err; 512e24a04c4SMark Brown } 513e24a04c4SMark Brown dcdc->dvs_vsel = ret & WM831X_DC1_DVS_VSEL_MASK; 514e24a04c4SMark Brown 515f0b067d9SMark Brown if (pdata && pdata->dcdc[id]) 516e24a04c4SMark Brown wm831x_buckv_dvs_init(dcdc, pdata->dcdc[id]->driver_data); 517e24a04c4SMark Brown 518c172708dSMark Brown config.dev = pdev->dev.parent; 519b7ca8788SMark Brown if (pdata) 520c172708dSMark Brown config.init_data = pdata->dcdc[id]; 521c172708dSMark Brown config.driver_data = dcdc; 5223d138fccSMark Brown config.regmap = wm831x->regmap; 523c172708dSMark Brown 524c172708dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &config); 525e4ee831fSMark Brown if (IS_ERR(dcdc->regulator)) { 526e4ee831fSMark Brown ret = PTR_ERR(dcdc->regulator); 527e4ee831fSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 528e4ee831fSMark Brown id + 1, ret); 529e4ee831fSMark Brown goto err; 530e4ee831fSMark Brown } 531e4ee831fSMark Brown 532cd99758bSMark Brown irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); 533dfda9c27SMark Brown ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, 534dfda9c27SMark Brown IRQF_TRIGGER_RISING, dcdc->name, dcdc); 535e4ee831fSMark Brown if (ret != 0) { 536e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 537e4ee831fSMark Brown irq, ret); 538e4ee831fSMark Brown goto err_regulator; 539e4ee831fSMark Brown } 540e4ee831fSMark Brown 541cd99758bSMark Brown irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "HC")); 542dfda9c27SMark Brown ret = request_threaded_irq(irq, NULL, wm831x_dcdc_oc_irq, 543dfda9c27SMark Brown IRQF_TRIGGER_RISING, dcdc->name, dcdc); 544e4ee831fSMark Brown if (ret != 0) { 545e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n", 546e4ee831fSMark Brown irq, ret); 547e4ee831fSMark Brown goto err_uv; 548e4ee831fSMark Brown } 549e4ee831fSMark Brown 550e4ee831fSMark Brown platform_set_drvdata(pdev, dcdc); 551e4ee831fSMark Brown 552e4ee831fSMark Brown return 0; 553e4ee831fSMark Brown 554e4ee831fSMark Brown err_uv: 555cd99758bSMark Brown free_irq(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")), 556cd99758bSMark Brown dcdc); 557e4ee831fSMark Brown err_regulator: 558e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 559e4ee831fSMark Brown err: 560e24a04c4SMark Brown if (dcdc->dvs_gpio) 561e24a04c4SMark Brown gpio_free(dcdc->dvs_gpio); 562e4ee831fSMark Brown return ret; 563e4ee831fSMark Brown } 564e4ee831fSMark Brown 5658dc995f5SBill Pemberton static int wm831x_buckv_remove(struct platform_device *pdev) 566e4ee831fSMark Brown { 567e4ee831fSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 568cd99758bSMark Brown struct wm831x *wm831x = dcdc->wm831x; 569e4ee831fSMark Brown 570cd99758bSMark Brown free_irq(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "HC")), 571cd99758bSMark Brown dcdc); 572cd99758bSMark Brown free_irq(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")), 573cd99758bSMark Brown dcdc); 574e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 575e24a04c4SMark Brown if (dcdc->dvs_gpio) 576e24a04c4SMark Brown gpio_free(dcdc->dvs_gpio); 577e4ee831fSMark Brown 578e4ee831fSMark Brown return 0; 579e4ee831fSMark Brown } 580e4ee831fSMark Brown 581e4ee831fSMark Brown static struct platform_driver wm831x_buckv_driver = { 582e4ee831fSMark Brown .probe = wm831x_buckv_probe, 5835eb9f2b9SBill Pemberton .remove = wm831x_buckv_remove, 584e4ee831fSMark Brown .driver = { 585e4ee831fSMark Brown .name = "wm831x-buckv", 586eb66d565SDmitry Torokhov .owner = THIS_MODULE, 587e4ee831fSMark Brown }, 588e4ee831fSMark Brown }; 589e4ee831fSMark Brown 590e4ee831fSMark Brown /* 591e4ee831fSMark Brown * BUCKP specifics 592e4ee831fSMark Brown */ 593e4ee831fSMark Brown 594d580cb5eSAxel Lin static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev, int uV) 595e4ee831fSMark Brown { 596e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 597e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 598e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 599d580cb5eSAxel Lin int sel; 600e4ee831fSMark Brown 601d580cb5eSAxel Lin sel = regulator_map_voltage_linear(rdev, uV, uV); 602d580cb5eSAxel Lin if (sel < 0) 603d580cb5eSAxel Lin return sel; 604d580cb5eSAxel Lin 605d580cb5eSAxel Lin return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, sel); 606e4ee831fSMark Brown } 607e4ee831fSMark Brown 608e4ee831fSMark Brown static struct regulator_ops wm831x_buckp_ops = { 609d580cb5eSAxel Lin .set_voltage_sel = regulator_set_voltage_sel_regmap, 610817436e7SMark Brown .get_voltage_sel = regulator_get_voltage_sel_regmap, 611c70ad9dcSAxel Lin .list_voltage = regulator_list_voltage_linear, 612d580cb5eSAxel Lin .map_voltage = regulator_map_voltage_linear, 613e4ee831fSMark Brown .set_suspend_voltage = wm831x_buckp_set_suspend_voltage, 614e4ee831fSMark Brown 6153d138fccSMark Brown .is_enabled = regulator_is_enabled_regmap, 6163d138fccSMark Brown .enable = regulator_enable_regmap, 6173d138fccSMark Brown .disable = regulator_disable_regmap, 618e4ee831fSMark Brown .get_status = wm831x_dcdc_get_status, 619e4ee831fSMark Brown .get_mode = wm831x_dcdc_get_mode, 620e4ee831fSMark Brown .set_mode = wm831x_dcdc_set_mode, 621e4ee831fSMark Brown .set_suspend_mode = wm831x_dcdc_set_suspend_mode, 622e4ee831fSMark Brown }; 623e4ee831fSMark Brown 624a5023574SBill Pemberton static int wm831x_buckp_probe(struct platform_device *pdev) 625e4ee831fSMark Brown { 626e4ee831fSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 627dff91d0bSJingoo Han struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev); 628c172708dSMark Brown struct regulator_config config = { }; 629137a6354SMark Brown int id; 630e4ee831fSMark Brown struct wm831x_dcdc *dcdc; 631e4ee831fSMark Brown struct resource *res; 632e4ee831fSMark Brown int ret, irq; 633e4ee831fSMark Brown 634137a6354SMark Brown if (pdata && pdata->wm831x_num) 635137a6354SMark Brown id = (pdata->wm831x_num * 10) + 1; 636137a6354SMark Brown else 637137a6354SMark Brown id = 0; 638137a6354SMark Brown id = pdev->id - id; 639137a6354SMark Brown 640e4ee831fSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 641e4ee831fSMark Brown 642fded2f4fSMark Brown dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), 643fded2f4fSMark Brown GFP_KERNEL); 644e4ee831fSMark Brown if (dcdc == NULL) { 645e4ee831fSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 646e4ee831fSMark Brown return -ENOMEM; 647e4ee831fSMark Brown } 648e4ee831fSMark Brown 649e4ee831fSMark Brown dcdc->wm831x = wm831x; 650e4ee831fSMark Brown 6515656098eSMark Brown res = platform_get_resource(pdev, IORESOURCE_REG, 0); 652e4ee831fSMark Brown if (res == NULL) { 6535656098eSMark Brown dev_err(&pdev->dev, "No REG resource\n"); 654e4ee831fSMark Brown ret = -EINVAL; 655e4ee831fSMark Brown goto err; 656e4ee831fSMark Brown } 657e4ee831fSMark Brown dcdc->base = res->start; 658e4ee831fSMark Brown 659e4ee831fSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 660e4ee831fSMark Brown dcdc->desc.name = dcdc->name; 66182caa978SMark Brown 66282caa978SMark Brown snprintf(dcdc->supply_name, sizeof(dcdc->supply_name), 66382caa978SMark Brown "DC%dVDD", id + 1); 66482caa978SMark Brown dcdc->desc.supply_name = dcdc->supply_name; 66582caa978SMark Brown 666e4ee831fSMark Brown dcdc->desc.id = id; 667e4ee831fSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 668e4ee831fSMark Brown dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1; 669e4ee831fSMark Brown dcdc->desc.ops = &wm831x_buckp_ops; 670e4ee831fSMark Brown dcdc->desc.owner = THIS_MODULE; 671817436e7SMark Brown dcdc->desc.vsel_reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 672817436e7SMark Brown dcdc->desc.vsel_mask = WM831X_DC3_ON_VSEL_MASK; 6733d138fccSMark Brown dcdc->desc.enable_reg = WM831X_DCDC_ENABLE; 6743d138fccSMark Brown dcdc->desc.enable_mask = 1 << id; 675c70ad9dcSAxel Lin dcdc->desc.min_uV = 850000; 676c70ad9dcSAxel Lin dcdc->desc.uV_step = 25000; 677e4ee831fSMark Brown 678c172708dSMark Brown config.dev = pdev->dev.parent; 679b7ca8788SMark Brown if (pdata) 680c172708dSMark Brown config.init_data = pdata->dcdc[id]; 681c172708dSMark Brown config.driver_data = dcdc; 682817436e7SMark Brown config.regmap = wm831x->regmap; 683c172708dSMark Brown 684c172708dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &config); 685e4ee831fSMark Brown if (IS_ERR(dcdc->regulator)) { 686e4ee831fSMark Brown ret = PTR_ERR(dcdc->regulator); 687e4ee831fSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 688e4ee831fSMark Brown id + 1, ret); 689e4ee831fSMark Brown goto err; 690e4ee831fSMark Brown } 691e4ee831fSMark Brown 692cd99758bSMark Brown irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); 693dfda9c27SMark Brown ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, 694dfda9c27SMark Brown IRQF_TRIGGER_RISING, dcdc->name, dcdc); 695e4ee831fSMark Brown if (ret != 0) { 696e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 697e4ee831fSMark Brown irq, ret); 698e4ee831fSMark Brown goto err_regulator; 699e4ee831fSMark Brown } 700e4ee831fSMark Brown 701e4ee831fSMark Brown platform_set_drvdata(pdev, dcdc); 702e4ee831fSMark Brown 703e4ee831fSMark Brown return 0; 704e4ee831fSMark Brown 705e4ee831fSMark Brown err_regulator: 706e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 707e4ee831fSMark Brown err: 708e4ee831fSMark Brown return ret; 709e4ee831fSMark Brown } 710e4ee831fSMark Brown 7118dc995f5SBill Pemberton static int wm831x_buckp_remove(struct platform_device *pdev) 712e4ee831fSMark Brown { 713e4ee831fSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 714e4ee831fSMark Brown 715cd99758bSMark Brown free_irq(wm831x_irq(dcdc->wm831x, platform_get_irq_byname(pdev, "UV")), 716cd99758bSMark Brown dcdc); 717e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 718e4ee831fSMark Brown 719e4ee831fSMark Brown return 0; 720e4ee831fSMark Brown } 721e4ee831fSMark Brown 722e4ee831fSMark Brown static struct platform_driver wm831x_buckp_driver = { 723e4ee831fSMark Brown .probe = wm831x_buckp_probe, 7245eb9f2b9SBill Pemberton .remove = wm831x_buckp_remove, 725e4ee831fSMark Brown .driver = { 726e4ee831fSMark Brown .name = "wm831x-buckp", 727eb66d565SDmitry Torokhov .owner = THIS_MODULE, 728e4ee831fSMark Brown }, 729e4ee831fSMark Brown }; 730e4ee831fSMark Brown 7318267a9baSMark Brown /* 7321304850dSMark Brown * DCDC boost convertors 7331304850dSMark Brown */ 7341304850dSMark Brown 7351304850dSMark Brown static int wm831x_boostp_get_status(struct regulator_dev *rdev) 7361304850dSMark Brown { 7371304850dSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 7381304850dSMark Brown struct wm831x *wm831x = dcdc->wm831x; 7391304850dSMark Brown int ret; 7401304850dSMark Brown 7411304850dSMark Brown /* First, check for errors */ 7421304850dSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); 7431304850dSMark Brown if (ret < 0) 7441304850dSMark Brown return ret; 7451304850dSMark Brown 7461304850dSMark Brown if (ret & (1 << rdev_get_id(rdev))) { 7471304850dSMark Brown dev_dbg(wm831x->dev, "DCDC%d under voltage\n", 7481304850dSMark Brown rdev_get_id(rdev) + 1); 7491304850dSMark Brown return REGULATOR_STATUS_ERROR; 7501304850dSMark Brown } 7511304850dSMark Brown 7521304850dSMark Brown /* Is the regulator on? */ 7531304850dSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); 7541304850dSMark Brown if (ret < 0) 7551304850dSMark Brown return ret; 7561304850dSMark Brown if (ret & (1 << rdev_get_id(rdev))) 7571304850dSMark Brown return REGULATOR_STATUS_ON; 7581304850dSMark Brown else 7591304850dSMark Brown return REGULATOR_STATUS_OFF; 7601304850dSMark Brown } 7611304850dSMark Brown 7621304850dSMark Brown static struct regulator_ops wm831x_boostp_ops = { 7631304850dSMark Brown .get_status = wm831x_boostp_get_status, 7641304850dSMark Brown 7653d138fccSMark Brown .is_enabled = regulator_is_enabled_regmap, 7663d138fccSMark Brown .enable = regulator_enable_regmap, 7673d138fccSMark Brown .disable = regulator_disable_regmap, 7681304850dSMark Brown }; 7691304850dSMark Brown 770a5023574SBill Pemberton static int wm831x_boostp_probe(struct platform_device *pdev) 7711304850dSMark Brown { 7721304850dSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 773dff91d0bSJingoo Han struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev); 774c172708dSMark Brown struct regulator_config config = { }; 7751304850dSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->dcdc); 7761304850dSMark Brown struct wm831x_dcdc *dcdc; 7771304850dSMark Brown struct resource *res; 7781304850dSMark Brown int ret, irq; 7791304850dSMark Brown 7801304850dSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 7811304850dSMark Brown 7821304850dSMark Brown if (pdata == NULL || pdata->dcdc[id] == NULL) 7831304850dSMark Brown return -ENODEV; 7841304850dSMark Brown 7854c60165dSAxel Lin dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL); 7861304850dSMark Brown if (dcdc == NULL) { 7871304850dSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 7881304850dSMark Brown return -ENOMEM; 7891304850dSMark Brown } 7901304850dSMark Brown 7911304850dSMark Brown dcdc->wm831x = wm831x; 7921304850dSMark Brown 7935656098eSMark Brown res = platform_get_resource(pdev, IORESOURCE_REG, 0); 7941304850dSMark Brown if (res == NULL) { 7955656098eSMark Brown dev_err(&pdev->dev, "No REG resource\n"); 7961304850dSMark Brown ret = -EINVAL; 7971304850dSMark Brown goto err; 7981304850dSMark Brown } 7991304850dSMark Brown dcdc->base = res->start; 8001304850dSMark Brown 8011304850dSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 8021304850dSMark Brown dcdc->desc.name = dcdc->name; 8031304850dSMark Brown dcdc->desc.id = id; 8041304850dSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 8051304850dSMark Brown dcdc->desc.ops = &wm831x_boostp_ops; 8061304850dSMark Brown dcdc->desc.owner = THIS_MODULE; 8073d138fccSMark Brown dcdc->desc.enable_reg = WM831X_DCDC_ENABLE; 8083d138fccSMark Brown dcdc->desc.enable_mask = 1 << id; 8091304850dSMark Brown 810c172708dSMark Brown config.dev = pdev->dev.parent; 811f0b067d9SMark Brown if (pdata) 812c172708dSMark Brown config.init_data = pdata->dcdc[id]; 813c172708dSMark Brown config.driver_data = dcdc; 8143d138fccSMark Brown config.regmap = wm831x->regmap; 815c172708dSMark Brown 816c172708dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &config); 8171304850dSMark Brown if (IS_ERR(dcdc->regulator)) { 8181304850dSMark Brown ret = PTR_ERR(dcdc->regulator); 8191304850dSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 8201304850dSMark Brown id + 1, ret); 8211304850dSMark Brown goto err; 8221304850dSMark Brown } 8231304850dSMark Brown 824cd99758bSMark Brown irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); 825dfda9c27SMark Brown ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, 8261304850dSMark Brown IRQF_TRIGGER_RISING, dcdc->name, 8271304850dSMark Brown dcdc); 8281304850dSMark Brown if (ret != 0) { 8291304850dSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 8301304850dSMark Brown irq, ret); 8311304850dSMark Brown goto err_regulator; 8321304850dSMark Brown } 8331304850dSMark Brown 8341304850dSMark Brown platform_set_drvdata(pdev, dcdc); 8351304850dSMark Brown 8361304850dSMark Brown return 0; 8371304850dSMark Brown 8381304850dSMark Brown err_regulator: 8391304850dSMark Brown regulator_unregister(dcdc->regulator); 8401304850dSMark Brown err: 8411304850dSMark Brown return ret; 8421304850dSMark Brown } 8431304850dSMark Brown 8448dc995f5SBill Pemberton static int wm831x_boostp_remove(struct platform_device *pdev) 8451304850dSMark Brown { 8461304850dSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 8471304850dSMark Brown 848cd99758bSMark Brown free_irq(wm831x_irq(dcdc->wm831x, platform_get_irq_byname(pdev, "UV")), 849cd99758bSMark Brown dcdc); 8501304850dSMark Brown regulator_unregister(dcdc->regulator); 8511304850dSMark Brown 8521304850dSMark Brown return 0; 8531304850dSMark Brown } 8541304850dSMark Brown 8551304850dSMark Brown static struct platform_driver wm831x_boostp_driver = { 8561304850dSMark Brown .probe = wm831x_boostp_probe, 8575eb9f2b9SBill Pemberton .remove = wm831x_boostp_remove, 8581304850dSMark Brown .driver = { 8591304850dSMark Brown .name = "wm831x-boostp", 860eb66d565SDmitry Torokhov .owner = THIS_MODULE, 8611304850dSMark Brown }, 8621304850dSMark Brown }; 8631304850dSMark Brown 8641304850dSMark Brown /* 8658267a9baSMark Brown * External Power Enable 8668267a9baSMark Brown * 8678267a9baSMark Brown * These aren't actually DCDCs but look like them in hardware so share 8688267a9baSMark Brown * code. 8698267a9baSMark Brown */ 8708267a9baSMark Brown 8718267a9baSMark Brown #define WM831X_EPE_BASE 6 8728267a9baSMark Brown 8738267a9baSMark Brown static struct regulator_ops wm831x_epe_ops = { 8743d138fccSMark Brown .is_enabled = regulator_is_enabled_regmap, 8753d138fccSMark Brown .enable = regulator_enable_regmap, 8763d138fccSMark Brown .disable = regulator_disable_regmap, 8778267a9baSMark Brown .get_status = wm831x_dcdc_get_status, 8788267a9baSMark Brown }; 8798267a9baSMark Brown 880a5023574SBill Pemberton static int wm831x_epe_probe(struct platform_device *pdev) 8818267a9baSMark Brown { 8828267a9baSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 883dff91d0bSJingoo Han struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev); 884c172708dSMark Brown struct regulator_config config = { }; 8858267a9baSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->epe); 8868267a9baSMark Brown struct wm831x_dcdc *dcdc; 8878267a9baSMark Brown int ret; 8888267a9baSMark Brown 8898267a9baSMark Brown dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1); 8908267a9baSMark Brown 8914c60165dSAxel Lin dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL); 8928267a9baSMark Brown if (dcdc == NULL) { 8938267a9baSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 8948267a9baSMark Brown return -ENOMEM; 8958267a9baSMark Brown } 8968267a9baSMark Brown 8978267a9baSMark Brown dcdc->wm831x = wm831x; 8988267a9baSMark Brown 8998267a9baSMark Brown /* For current parts this is correct; probably need to revisit 9008267a9baSMark Brown * in future. 9018267a9baSMark Brown */ 9028267a9baSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1); 9038267a9baSMark Brown dcdc->desc.name = dcdc->name; 9048267a9baSMark Brown dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */ 9058267a9baSMark Brown dcdc->desc.ops = &wm831x_epe_ops; 9068267a9baSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 9078267a9baSMark Brown dcdc->desc.owner = THIS_MODULE; 9083d138fccSMark Brown dcdc->desc.enable_reg = WM831X_DCDC_ENABLE; 9093d138fccSMark Brown dcdc->desc.enable_mask = 1 << dcdc->desc.id; 9108267a9baSMark Brown 911c172708dSMark Brown config.dev = pdev->dev.parent; 912b7ca8788SMark Brown if (pdata) 913c172708dSMark Brown config.init_data = pdata->epe[id]; 914c172708dSMark Brown config.driver_data = dcdc; 9153d138fccSMark Brown config.regmap = wm831x->regmap; 916c172708dSMark Brown 917c172708dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &config); 9188267a9baSMark Brown if (IS_ERR(dcdc->regulator)) { 9198267a9baSMark Brown ret = PTR_ERR(dcdc->regulator); 9208267a9baSMark Brown dev_err(wm831x->dev, "Failed to register EPE%d: %d\n", 9218267a9baSMark Brown id + 1, ret); 9228267a9baSMark Brown goto err; 9238267a9baSMark Brown } 9248267a9baSMark Brown 9258267a9baSMark Brown platform_set_drvdata(pdev, dcdc); 9268267a9baSMark Brown 9278267a9baSMark Brown return 0; 9288267a9baSMark Brown 9298267a9baSMark Brown err: 9308267a9baSMark Brown return ret; 9318267a9baSMark Brown } 9328267a9baSMark Brown 9338dc995f5SBill Pemberton static int wm831x_epe_remove(struct platform_device *pdev) 9348267a9baSMark Brown { 9358267a9baSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 9368267a9baSMark Brown 9378267a9baSMark Brown regulator_unregister(dcdc->regulator); 9388267a9baSMark Brown 9398267a9baSMark Brown return 0; 9408267a9baSMark Brown } 9418267a9baSMark Brown 9428267a9baSMark Brown static struct platform_driver wm831x_epe_driver = { 9438267a9baSMark Brown .probe = wm831x_epe_probe, 9445eb9f2b9SBill Pemberton .remove = wm831x_epe_remove, 9458267a9baSMark Brown .driver = { 9468267a9baSMark Brown .name = "wm831x-epe", 947eb66d565SDmitry Torokhov .owner = THIS_MODULE, 9488267a9baSMark Brown }, 9498267a9baSMark Brown }; 9508267a9baSMark Brown 951e4ee831fSMark Brown static int __init wm831x_dcdc_init(void) 952e4ee831fSMark Brown { 953e4ee831fSMark Brown int ret; 954e4ee831fSMark Brown ret = platform_driver_register(&wm831x_buckv_driver); 955e4ee831fSMark Brown if (ret != 0) 956e4ee831fSMark Brown pr_err("Failed to register WM831x BUCKV driver: %d\n", ret); 957e4ee831fSMark Brown 958e4ee831fSMark Brown ret = platform_driver_register(&wm831x_buckp_driver); 959e4ee831fSMark Brown if (ret != 0) 960e4ee831fSMark Brown pr_err("Failed to register WM831x BUCKP driver: %d\n", ret); 961e4ee831fSMark Brown 9621304850dSMark Brown ret = platform_driver_register(&wm831x_boostp_driver); 9631304850dSMark Brown if (ret != 0) 9641304850dSMark Brown pr_err("Failed to register WM831x BOOST driver: %d\n", ret); 9651304850dSMark Brown 9668267a9baSMark Brown ret = platform_driver_register(&wm831x_epe_driver); 9678267a9baSMark Brown if (ret != 0) 9688267a9baSMark Brown pr_err("Failed to register WM831x EPE driver: %d\n", ret); 9698267a9baSMark Brown 970e4ee831fSMark Brown return 0; 971e4ee831fSMark Brown } 972e4ee831fSMark Brown subsys_initcall(wm831x_dcdc_init); 973e4ee831fSMark Brown 974e4ee831fSMark Brown static void __exit wm831x_dcdc_exit(void) 975e4ee831fSMark Brown { 9768267a9baSMark Brown platform_driver_unregister(&wm831x_epe_driver); 9771304850dSMark Brown platform_driver_unregister(&wm831x_boostp_driver); 978e4ee831fSMark Brown platform_driver_unregister(&wm831x_buckp_driver); 979e4ee831fSMark Brown platform_driver_unregister(&wm831x_buckv_driver); 980e4ee831fSMark Brown } 981e4ee831fSMark Brown module_exit(wm831x_dcdc_exit); 982e4ee831fSMark Brown 983e4ee831fSMark Brown /* Module information */ 984e4ee831fSMark Brown MODULE_AUTHOR("Mark Brown"); 985e4ee831fSMark Brown MODULE_DESCRIPTION("WM831x DC-DC convertor driver"); 986e4ee831fSMark Brown MODULE_LICENSE("GPL"); 987e4ee831fSMark Brown MODULE_ALIAS("platform:wm831x-buckv"); 988e4ee831fSMark Brown MODULE_ALIAS("platform:wm831x-buckp"); 98943f1f216SAxel Lin MODULE_ALIAS("platform:wm831x-boostp"); 99024b43150SMark Brown MODULE_ALIAS("platform:wm831x-epe"); 991