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) 226e4ee831fSMark Brown vsel = ((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, 29388cda60eSMark Brown dcdc->dvs_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 342e4ee831fSMark Brown for (i = 0; i < ARRAY_SIZE(wm831x_dcdc_ilim); i++) { 343a171e782SAxel Lin if ((min_uA <= wm831x_dcdc_ilim[i]) && 344a171e782SAxel Lin (wm831x_dcdc_ilim[i] <= max_uA)) 345e4ee831fSMark Brown break; 346e4ee831fSMark Brown } 347e4ee831fSMark Brown if (i == ARRAY_SIZE(wm831x_dcdc_ilim)) 348e4ee831fSMark Brown return -EINVAL; 349e4ee831fSMark Brown 35009bf14b9SAxel Lin return wm831x_set_bits(wm831x, reg, WM831X_DC1_HC_THR_MASK, 35109bf14b9SAxel Lin i << WM831X_DC1_HC_THR_SHIFT); 352e4ee831fSMark Brown } 353e4ee831fSMark Brown 354e4ee831fSMark Brown static int wm831x_buckv_get_current_limit(struct regulator_dev *rdev) 355e4ee831fSMark Brown { 356e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 357e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 358e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; 359e4ee831fSMark Brown int val; 360e4ee831fSMark Brown 361e4ee831fSMark Brown val = wm831x_reg_read(wm831x, reg); 362e4ee831fSMark Brown if (val < 0) 363e4ee831fSMark Brown return val; 364e4ee831fSMark Brown 36509bf14b9SAxel Lin val = (val & WM831X_DC1_HC_THR_MASK) >> WM831X_DC1_HC_THR_SHIFT; 36609bf14b9SAxel Lin return wm831x_dcdc_ilim[val]; 367e4ee831fSMark Brown } 368e4ee831fSMark Brown 369e4ee831fSMark Brown static struct regulator_ops wm831x_buckv_ops = { 370b5fb77e0SAxel Lin .set_voltage_sel = wm831x_buckv_set_voltage_sel, 371afb8bb80SMark Brown .get_voltage_sel = wm831x_buckv_get_voltage_sel, 372e4ee831fSMark Brown .list_voltage = wm831x_buckv_list_voltage, 373b5fb77e0SAxel Lin .map_voltage = wm831x_buckv_map_voltage, 374e4ee831fSMark Brown .set_suspend_voltage = wm831x_buckv_set_suspend_voltage, 375e4ee831fSMark Brown .set_current_limit = wm831x_buckv_set_current_limit, 376e4ee831fSMark Brown .get_current_limit = wm831x_buckv_get_current_limit, 377e4ee831fSMark Brown 3783d138fccSMark Brown .is_enabled = regulator_is_enabled_regmap, 3793d138fccSMark Brown .enable = regulator_enable_regmap, 3803d138fccSMark Brown .disable = regulator_disable_regmap, 381e4ee831fSMark Brown .get_status = wm831x_dcdc_get_status, 382e4ee831fSMark Brown .get_mode = wm831x_dcdc_get_mode, 383e4ee831fSMark Brown .set_mode = wm831x_dcdc_set_mode, 384e4ee831fSMark Brown .set_suspend_mode = wm831x_dcdc_set_suspend_mode, 385e4ee831fSMark Brown }; 386e4ee831fSMark Brown 387e24a04c4SMark Brown /* 388e24a04c4SMark Brown * Set up DVS control. We just log errors since we can still run 389e24a04c4SMark Brown * (with reduced performance) if we fail. 390e24a04c4SMark Brown */ 391e24a04c4SMark Brown static __devinit void wm831x_buckv_dvs_init(struct wm831x_dcdc *dcdc, 392e24a04c4SMark Brown struct wm831x_buckv_pdata *pdata) 393e24a04c4SMark Brown { 394e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 395e24a04c4SMark Brown int ret; 396e24a04c4SMark Brown u16 ctrl; 397e24a04c4SMark Brown 398e24a04c4SMark Brown if (!pdata || !pdata->dvs_gpio) 399e24a04c4SMark Brown return; 400e24a04c4SMark Brown 401e24a04c4SMark Brown /* gpiolib won't let us read the GPIO status so pick the higher 402e24a04c4SMark Brown * of the two existing voltages so we take it as platform data. 403e24a04c4SMark Brown */ 404e24a04c4SMark Brown dcdc->dvs_gpio_state = pdata->dvs_init_state; 405e24a04c4SMark Brown 406053fa1b7SMark Brown ret = gpio_request_one(pdata->dvs_gpio, 407053fa1b7SMark Brown dcdc->dvs_gpio_state ? GPIOF_INIT_HIGH : 0, 408053fa1b7SMark Brown "DCDC DVS"); 409e24a04c4SMark Brown if (ret < 0) { 410053fa1b7SMark Brown dev_err(wm831x->dev, "Failed to get %s DVS GPIO: %d\n", 411e24a04c4SMark Brown dcdc->name, ret); 412e24a04c4SMark Brown return; 413e24a04c4SMark Brown } 414e24a04c4SMark Brown 415e24a04c4SMark Brown dcdc->dvs_gpio = pdata->dvs_gpio; 416b47ba9fdSMark Brown 417b47ba9fdSMark Brown switch (pdata->dvs_control_src) { 418b47ba9fdSMark Brown case 1: 419b47ba9fdSMark Brown ctrl = 2 << WM831X_DC1_DVS_SRC_SHIFT; 420b47ba9fdSMark Brown break; 421b47ba9fdSMark Brown case 2: 422b47ba9fdSMark Brown ctrl = 3 << WM831X_DC1_DVS_SRC_SHIFT; 423b47ba9fdSMark Brown break; 424b47ba9fdSMark Brown default: 425b47ba9fdSMark Brown dev_err(wm831x->dev, "Invalid DVS control source %d for %s\n", 426b47ba9fdSMark Brown pdata->dvs_control_src, dcdc->name); 427b47ba9fdSMark Brown return; 428b47ba9fdSMark Brown } 429b47ba9fdSMark Brown 430c439b8f4SMark Brown /* If DVS_VSEL is set to the minimum value then raise it to ON_VSEL 431c439b8f4SMark Brown * to make bootstrapping a bit smoother. 432c439b8f4SMark Brown */ 433c439b8f4SMark Brown if (!dcdc->dvs_vsel) { 434c439b8f4SMark Brown ret = wm831x_set_bits(wm831x, 435c439b8f4SMark Brown dcdc->base + WM831X_DCDC_DVS_CONTROL, 436c439b8f4SMark Brown WM831X_DC1_DVS_VSEL_MASK, dcdc->on_vsel); 437c439b8f4SMark Brown if (ret == 0) 438c439b8f4SMark Brown dcdc->dvs_vsel = dcdc->on_vsel; 439c439b8f4SMark Brown else 440c439b8f4SMark Brown dev_warn(wm831x->dev, "Failed to set DVS_VSEL: %d\n", 441c439b8f4SMark Brown ret); 442c439b8f4SMark Brown } 443c439b8f4SMark Brown 444b47ba9fdSMark Brown ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL, 445b47ba9fdSMark Brown WM831X_DC1_DVS_SRC_MASK, ctrl); 446b47ba9fdSMark Brown if (ret < 0) { 447b47ba9fdSMark Brown dev_err(wm831x->dev, "Failed to set %s DVS source: %d\n", 448b47ba9fdSMark Brown dcdc->name, ret); 449b47ba9fdSMark Brown } 450e24a04c4SMark Brown } 451e24a04c4SMark Brown 452e4ee831fSMark Brown static __devinit int wm831x_buckv_probe(struct platform_device *pdev) 453e4ee831fSMark Brown { 454e4ee831fSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 455e4ee831fSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 456c172708dSMark Brown struct regulator_config config = { }; 457137a6354SMark Brown int id; 458e4ee831fSMark Brown struct wm831x_dcdc *dcdc; 459e4ee831fSMark Brown struct resource *res; 460e4ee831fSMark Brown int ret, irq; 461e4ee831fSMark Brown 462137a6354SMark Brown if (pdata && pdata->wm831x_num) 463137a6354SMark Brown id = (pdata->wm831x_num * 10) + 1; 464137a6354SMark Brown else 465137a6354SMark Brown id = 0; 466137a6354SMark Brown id = pdev->id - id; 467137a6354SMark Brown 468e4ee831fSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 469e4ee831fSMark Brown 470fded2f4fSMark Brown dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), 471fded2f4fSMark Brown GFP_KERNEL); 472e4ee831fSMark Brown if (dcdc == NULL) { 473e4ee831fSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 474e4ee831fSMark Brown return -ENOMEM; 475e4ee831fSMark Brown } 476e4ee831fSMark Brown 477e4ee831fSMark Brown dcdc->wm831x = wm831x; 478e4ee831fSMark Brown 4795656098eSMark Brown res = platform_get_resource(pdev, IORESOURCE_REG, 0); 480e4ee831fSMark Brown if (res == NULL) { 4815656098eSMark Brown dev_err(&pdev->dev, "No REG resource\n"); 482e4ee831fSMark Brown ret = -EINVAL; 483e4ee831fSMark Brown goto err; 484e4ee831fSMark Brown } 485e4ee831fSMark Brown dcdc->base = res->start; 486e4ee831fSMark Brown 487e4ee831fSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 488e4ee831fSMark Brown dcdc->desc.name = dcdc->name; 48982caa978SMark Brown 49082caa978SMark Brown snprintf(dcdc->supply_name, sizeof(dcdc->supply_name), 49182caa978SMark Brown "DC%dVDD", id + 1); 49282caa978SMark Brown dcdc->desc.supply_name = dcdc->supply_name; 49382caa978SMark Brown 494e4ee831fSMark Brown dcdc->desc.id = id; 495e4ee831fSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 496e4ee831fSMark Brown dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1; 497e4ee831fSMark Brown dcdc->desc.ops = &wm831x_buckv_ops; 498e4ee831fSMark Brown dcdc->desc.owner = THIS_MODULE; 4993d138fccSMark Brown dcdc->desc.enable_reg = WM831X_DCDC_ENABLE; 5003d138fccSMark Brown dcdc->desc.enable_mask = 1 << id; 501e4ee831fSMark Brown 502e24a04c4SMark Brown ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG); 503e24a04c4SMark Brown if (ret < 0) { 504e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to read ON VSEL: %d\n", ret); 505e24a04c4SMark Brown goto err; 506e24a04c4SMark Brown } 507e24a04c4SMark Brown dcdc->on_vsel = ret & WM831X_DC1_ON_VSEL_MASK; 508e24a04c4SMark Brown 509a1b81dd3SMark Brown ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL); 510e24a04c4SMark Brown if (ret < 0) { 511e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to read DVS VSEL: %d\n", ret); 512e24a04c4SMark Brown goto err; 513e24a04c4SMark Brown } 514e24a04c4SMark Brown dcdc->dvs_vsel = ret & WM831X_DC1_DVS_VSEL_MASK; 515e24a04c4SMark Brown 516f0b067d9SMark Brown if (pdata && pdata->dcdc[id]) 517e24a04c4SMark Brown wm831x_buckv_dvs_init(dcdc, pdata->dcdc[id]->driver_data); 518e24a04c4SMark Brown 519c172708dSMark Brown config.dev = pdev->dev.parent; 520b7ca8788SMark Brown if (pdata) 521c172708dSMark Brown config.init_data = pdata->dcdc[id]; 522c172708dSMark Brown config.driver_data = dcdc; 5233d138fccSMark Brown config.regmap = wm831x->regmap; 524c172708dSMark Brown 525c172708dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &config); 526e4ee831fSMark Brown if (IS_ERR(dcdc->regulator)) { 527e4ee831fSMark Brown ret = PTR_ERR(dcdc->regulator); 528e4ee831fSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 529e4ee831fSMark Brown id + 1, ret); 530e4ee831fSMark Brown goto err; 531e4ee831fSMark Brown } 532e4ee831fSMark Brown 533cd99758bSMark Brown irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); 534dfda9c27SMark Brown ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, 535dfda9c27SMark Brown IRQF_TRIGGER_RISING, dcdc->name, dcdc); 536e4ee831fSMark Brown if (ret != 0) { 537e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 538e4ee831fSMark Brown irq, ret); 539e4ee831fSMark Brown goto err_regulator; 540e4ee831fSMark Brown } 541e4ee831fSMark Brown 542cd99758bSMark Brown irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "HC")); 543dfda9c27SMark Brown ret = request_threaded_irq(irq, NULL, wm831x_dcdc_oc_irq, 544dfda9c27SMark Brown IRQF_TRIGGER_RISING, dcdc->name, dcdc); 545e4ee831fSMark Brown if (ret != 0) { 546e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n", 547e4ee831fSMark Brown irq, ret); 548e4ee831fSMark Brown goto err_uv; 549e4ee831fSMark Brown } 550e4ee831fSMark Brown 551e4ee831fSMark Brown platform_set_drvdata(pdev, dcdc); 552e4ee831fSMark Brown 553e4ee831fSMark Brown return 0; 554e4ee831fSMark Brown 555e4ee831fSMark Brown err_uv: 556cd99758bSMark Brown free_irq(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")), 557cd99758bSMark Brown dcdc); 558e4ee831fSMark Brown err_regulator: 559e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 560e4ee831fSMark Brown err: 561e24a04c4SMark Brown if (dcdc->dvs_gpio) 562e24a04c4SMark Brown gpio_free(dcdc->dvs_gpio); 563e4ee831fSMark Brown return ret; 564e4ee831fSMark Brown } 565e4ee831fSMark Brown 566e4ee831fSMark Brown static __devexit int wm831x_buckv_remove(struct platform_device *pdev) 567e4ee831fSMark Brown { 568e4ee831fSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 569cd99758bSMark Brown struct wm831x *wm831x = dcdc->wm831x; 570e4ee831fSMark Brown 571eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 572eb66d565SDmitry Torokhov 573cd99758bSMark Brown free_irq(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "HC")), 574cd99758bSMark Brown dcdc); 575cd99758bSMark Brown free_irq(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")), 576cd99758bSMark Brown dcdc); 577e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 578e24a04c4SMark Brown if (dcdc->dvs_gpio) 579e24a04c4SMark Brown gpio_free(dcdc->dvs_gpio); 580e4ee831fSMark Brown 581e4ee831fSMark Brown return 0; 582e4ee831fSMark Brown } 583e4ee831fSMark Brown 584e4ee831fSMark Brown static struct platform_driver wm831x_buckv_driver = { 585e4ee831fSMark Brown .probe = wm831x_buckv_probe, 586e4ee831fSMark Brown .remove = __devexit_p(wm831x_buckv_remove), 587e4ee831fSMark Brown .driver = { 588e4ee831fSMark Brown .name = "wm831x-buckv", 589eb66d565SDmitry Torokhov .owner = THIS_MODULE, 590e4ee831fSMark Brown }, 591e4ee831fSMark Brown }; 592e4ee831fSMark Brown 593e4ee831fSMark Brown /* 594e4ee831fSMark Brown * BUCKP specifics 595e4ee831fSMark Brown */ 596e4ee831fSMark Brown 597d580cb5eSAxel Lin static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev, int uV) 598e4ee831fSMark Brown { 599e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 600e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 601e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 602d580cb5eSAxel Lin int sel; 603e4ee831fSMark Brown 604d580cb5eSAxel Lin sel = regulator_map_voltage_linear(rdev, uV, uV); 605d580cb5eSAxel Lin if (sel < 0) 606d580cb5eSAxel Lin return sel; 607d580cb5eSAxel Lin 608d580cb5eSAxel Lin return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, sel); 609e4ee831fSMark Brown } 610e4ee831fSMark Brown 611e4ee831fSMark Brown static struct regulator_ops wm831x_buckp_ops = { 612d580cb5eSAxel Lin .set_voltage_sel = regulator_set_voltage_sel_regmap, 613817436e7SMark Brown .get_voltage_sel = regulator_get_voltage_sel_regmap, 614c70ad9dcSAxel Lin .list_voltage = regulator_list_voltage_linear, 615d580cb5eSAxel Lin .map_voltage = regulator_map_voltage_linear, 616e4ee831fSMark Brown .set_suspend_voltage = wm831x_buckp_set_suspend_voltage, 617e4ee831fSMark Brown 6183d138fccSMark Brown .is_enabled = regulator_is_enabled_regmap, 6193d138fccSMark Brown .enable = regulator_enable_regmap, 6203d138fccSMark Brown .disable = regulator_disable_regmap, 621e4ee831fSMark Brown .get_status = wm831x_dcdc_get_status, 622e4ee831fSMark Brown .get_mode = wm831x_dcdc_get_mode, 623e4ee831fSMark Brown .set_mode = wm831x_dcdc_set_mode, 624e4ee831fSMark Brown .set_suspend_mode = wm831x_dcdc_set_suspend_mode, 625e4ee831fSMark Brown }; 626e4ee831fSMark Brown 627e4ee831fSMark Brown static __devinit int wm831x_buckp_probe(struct platform_device *pdev) 628e4ee831fSMark Brown { 629e4ee831fSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 630e4ee831fSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 631c172708dSMark Brown struct regulator_config config = { }; 632137a6354SMark Brown int id; 633e4ee831fSMark Brown struct wm831x_dcdc *dcdc; 634e4ee831fSMark Brown struct resource *res; 635e4ee831fSMark Brown int ret, irq; 636e4ee831fSMark Brown 637137a6354SMark Brown if (pdata && pdata->wm831x_num) 638137a6354SMark Brown id = (pdata->wm831x_num * 10) + 1; 639137a6354SMark Brown else 640137a6354SMark Brown id = 0; 641137a6354SMark Brown id = pdev->id - id; 642137a6354SMark Brown 643e4ee831fSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 644e4ee831fSMark Brown 645fded2f4fSMark Brown dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), 646fded2f4fSMark Brown GFP_KERNEL); 647e4ee831fSMark Brown if (dcdc == NULL) { 648e4ee831fSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 649e4ee831fSMark Brown return -ENOMEM; 650e4ee831fSMark Brown } 651e4ee831fSMark Brown 652e4ee831fSMark Brown dcdc->wm831x = wm831x; 653e4ee831fSMark Brown 6545656098eSMark Brown res = platform_get_resource(pdev, IORESOURCE_REG, 0); 655e4ee831fSMark Brown if (res == NULL) { 6565656098eSMark Brown dev_err(&pdev->dev, "No REG resource\n"); 657e4ee831fSMark Brown ret = -EINVAL; 658e4ee831fSMark Brown goto err; 659e4ee831fSMark Brown } 660e4ee831fSMark Brown dcdc->base = res->start; 661e4ee831fSMark Brown 662e4ee831fSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 663e4ee831fSMark Brown dcdc->desc.name = dcdc->name; 66482caa978SMark Brown 66582caa978SMark Brown snprintf(dcdc->supply_name, sizeof(dcdc->supply_name), 66682caa978SMark Brown "DC%dVDD", id + 1); 66782caa978SMark Brown dcdc->desc.supply_name = dcdc->supply_name; 66882caa978SMark Brown 669e4ee831fSMark Brown dcdc->desc.id = id; 670e4ee831fSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 671e4ee831fSMark Brown dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1; 672e4ee831fSMark Brown dcdc->desc.ops = &wm831x_buckp_ops; 673e4ee831fSMark Brown dcdc->desc.owner = THIS_MODULE; 674817436e7SMark Brown dcdc->desc.vsel_reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 675817436e7SMark Brown dcdc->desc.vsel_mask = WM831X_DC3_ON_VSEL_MASK; 6763d138fccSMark Brown dcdc->desc.enable_reg = WM831X_DCDC_ENABLE; 6773d138fccSMark Brown dcdc->desc.enable_mask = 1 << id; 678c70ad9dcSAxel Lin dcdc->desc.min_uV = 850000; 679c70ad9dcSAxel Lin dcdc->desc.uV_step = 25000; 680e4ee831fSMark Brown 681c172708dSMark Brown config.dev = pdev->dev.parent; 682b7ca8788SMark Brown if (pdata) 683c172708dSMark Brown config.init_data = pdata->dcdc[id]; 684c172708dSMark Brown config.driver_data = dcdc; 685817436e7SMark Brown config.regmap = wm831x->regmap; 686c172708dSMark Brown 687c172708dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &config); 688e4ee831fSMark Brown if (IS_ERR(dcdc->regulator)) { 689e4ee831fSMark Brown ret = PTR_ERR(dcdc->regulator); 690e4ee831fSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 691e4ee831fSMark Brown id + 1, ret); 692e4ee831fSMark Brown goto err; 693e4ee831fSMark Brown } 694e4ee831fSMark Brown 695cd99758bSMark Brown irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); 696dfda9c27SMark Brown ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, 697dfda9c27SMark Brown IRQF_TRIGGER_RISING, dcdc->name, dcdc); 698e4ee831fSMark Brown if (ret != 0) { 699e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 700e4ee831fSMark Brown irq, ret); 701e4ee831fSMark Brown goto err_regulator; 702e4ee831fSMark Brown } 703e4ee831fSMark Brown 704e4ee831fSMark Brown platform_set_drvdata(pdev, dcdc); 705e4ee831fSMark Brown 706e4ee831fSMark Brown return 0; 707e4ee831fSMark Brown 708e4ee831fSMark Brown err_regulator: 709e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 710e4ee831fSMark Brown err: 711e4ee831fSMark Brown return ret; 712e4ee831fSMark Brown } 713e4ee831fSMark Brown 714e4ee831fSMark Brown static __devexit int wm831x_buckp_remove(struct platform_device *pdev) 715e4ee831fSMark Brown { 716e4ee831fSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 717e4ee831fSMark Brown 718eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 719eb66d565SDmitry Torokhov 720cd99758bSMark Brown free_irq(wm831x_irq(dcdc->wm831x, platform_get_irq_byname(pdev, "UV")), 721cd99758bSMark Brown dcdc); 722e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 723e4ee831fSMark Brown 724e4ee831fSMark Brown return 0; 725e4ee831fSMark Brown } 726e4ee831fSMark Brown 727e4ee831fSMark Brown static struct platform_driver wm831x_buckp_driver = { 728e4ee831fSMark Brown .probe = wm831x_buckp_probe, 729e4ee831fSMark Brown .remove = __devexit_p(wm831x_buckp_remove), 730e4ee831fSMark Brown .driver = { 731e4ee831fSMark Brown .name = "wm831x-buckp", 732eb66d565SDmitry Torokhov .owner = THIS_MODULE, 733e4ee831fSMark Brown }, 734e4ee831fSMark Brown }; 735e4ee831fSMark Brown 7368267a9baSMark Brown /* 7371304850dSMark Brown * DCDC boost convertors 7381304850dSMark Brown */ 7391304850dSMark Brown 7401304850dSMark Brown static int wm831x_boostp_get_status(struct regulator_dev *rdev) 7411304850dSMark Brown { 7421304850dSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 7431304850dSMark Brown struct wm831x *wm831x = dcdc->wm831x; 7441304850dSMark Brown int ret; 7451304850dSMark Brown 7461304850dSMark Brown /* First, check for errors */ 7471304850dSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); 7481304850dSMark Brown if (ret < 0) 7491304850dSMark Brown return ret; 7501304850dSMark Brown 7511304850dSMark Brown if (ret & (1 << rdev_get_id(rdev))) { 7521304850dSMark Brown dev_dbg(wm831x->dev, "DCDC%d under voltage\n", 7531304850dSMark Brown rdev_get_id(rdev) + 1); 7541304850dSMark Brown return REGULATOR_STATUS_ERROR; 7551304850dSMark Brown } 7561304850dSMark Brown 7571304850dSMark Brown /* Is the regulator on? */ 7581304850dSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); 7591304850dSMark Brown if (ret < 0) 7601304850dSMark Brown return ret; 7611304850dSMark Brown if (ret & (1 << rdev_get_id(rdev))) 7621304850dSMark Brown return REGULATOR_STATUS_ON; 7631304850dSMark Brown else 7641304850dSMark Brown return REGULATOR_STATUS_OFF; 7651304850dSMark Brown } 7661304850dSMark Brown 7671304850dSMark Brown static struct regulator_ops wm831x_boostp_ops = { 7681304850dSMark Brown .get_status = wm831x_boostp_get_status, 7691304850dSMark Brown 7703d138fccSMark Brown .is_enabled = regulator_is_enabled_regmap, 7713d138fccSMark Brown .enable = regulator_enable_regmap, 7723d138fccSMark Brown .disable = regulator_disable_regmap, 7731304850dSMark Brown }; 7741304850dSMark Brown 7751304850dSMark Brown static __devinit int wm831x_boostp_probe(struct platform_device *pdev) 7761304850dSMark Brown { 7771304850dSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 7781304850dSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 779c172708dSMark Brown struct regulator_config config = { }; 7801304850dSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->dcdc); 7811304850dSMark Brown struct wm831x_dcdc *dcdc; 7821304850dSMark Brown struct resource *res; 7831304850dSMark Brown int ret, irq; 7841304850dSMark Brown 7851304850dSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 7861304850dSMark Brown 7871304850dSMark Brown if (pdata == NULL || pdata->dcdc[id] == NULL) 7881304850dSMark Brown return -ENODEV; 7891304850dSMark Brown 7904c60165dSAxel Lin dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL); 7911304850dSMark Brown if (dcdc == NULL) { 7921304850dSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 7931304850dSMark Brown return -ENOMEM; 7941304850dSMark Brown } 7951304850dSMark Brown 7961304850dSMark Brown dcdc->wm831x = wm831x; 7971304850dSMark Brown 7985656098eSMark Brown res = platform_get_resource(pdev, IORESOURCE_REG, 0); 7991304850dSMark Brown if (res == NULL) { 8005656098eSMark Brown dev_err(&pdev->dev, "No REG resource\n"); 8011304850dSMark Brown ret = -EINVAL; 8021304850dSMark Brown goto err; 8031304850dSMark Brown } 8041304850dSMark Brown dcdc->base = res->start; 8051304850dSMark Brown 8061304850dSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 8071304850dSMark Brown dcdc->desc.name = dcdc->name; 8081304850dSMark Brown dcdc->desc.id = id; 8091304850dSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 8101304850dSMark Brown dcdc->desc.ops = &wm831x_boostp_ops; 8111304850dSMark Brown dcdc->desc.owner = THIS_MODULE; 8123d138fccSMark Brown dcdc->desc.enable_reg = WM831X_DCDC_ENABLE; 8133d138fccSMark Brown dcdc->desc.enable_mask = 1 << id; 8141304850dSMark Brown 815c172708dSMark Brown config.dev = pdev->dev.parent; 816f0b067d9SMark Brown if (pdata) 817c172708dSMark Brown config.init_data = pdata->dcdc[id]; 818c172708dSMark Brown config.driver_data = dcdc; 8193d138fccSMark Brown config.regmap = wm831x->regmap; 820c172708dSMark Brown 821c172708dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &config); 8221304850dSMark Brown if (IS_ERR(dcdc->regulator)) { 8231304850dSMark Brown ret = PTR_ERR(dcdc->regulator); 8241304850dSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 8251304850dSMark Brown id + 1, ret); 8261304850dSMark Brown goto err; 8271304850dSMark Brown } 8281304850dSMark Brown 829cd99758bSMark Brown irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); 830dfda9c27SMark Brown ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, 8311304850dSMark Brown IRQF_TRIGGER_RISING, dcdc->name, 8321304850dSMark Brown dcdc); 8331304850dSMark Brown if (ret != 0) { 8341304850dSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 8351304850dSMark Brown irq, ret); 8361304850dSMark Brown goto err_regulator; 8371304850dSMark Brown } 8381304850dSMark Brown 8391304850dSMark Brown platform_set_drvdata(pdev, dcdc); 8401304850dSMark Brown 8411304850dSMark Brown return 0; 8421304850dSMark Brown 8431304850dSMark Brown err_regulator: 8441304850dSMark Brown regulator_unregister(dcdc->regulator); 8451304850dSMark Brown err: 8461304850dSMark Brown return ret; 8471304850dSMark Brown } 8481304850dSMark Brown 8491304850dSMark Brown static __devexit int wm831x_boostp_remove(struct platform_device *pdev) 8501304850dSMark Brown { 8511304850dSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 8521304850dSMark Brown 853eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 854eb66d565SDmitry Torokhov 855cd99758bSMark Brown free_irq(wm831x_irq(dcdc->wm831x, platform_get_irq_byname(pdev, "UV")), 856cd99758bSMark Brown dcdc); 8571304850dSMark Brown regulator_unregister(dcdc->regulator); 8581304850dSMark Brown 8591304850dSMark Brown return 0; 8601304850dSMark Brown } 8611304850dSMark Brown 8621304850dSMark Brown static struct platform_driver wm831x_boostp_driver = { 8631304850dSMark Brown .probe = wm831x_boostp_probe, 8641304850dSMark Brown .remove = __devexit_p(wm831x_boostp_remove), 8651304850dSMark Brown .driver = { 8661304850dSMark Brown .name = "wm831x-boostp", 867eb66d565SDmitry Torokhov .owner = THIS_MODULE, 8681304850dSMark Brown }, 8691304850dSMark Brown }; 8701304850dSMark Brown 8711304850dSMark Brown /* 8728267a9baSMark Brown * External Power Enable 8738267a9baSMark Brown * 8748267a9baSMark Brown * These aren't actually DCDCs but look like them in hardware so share 8758267a9baSMark Brown * code. 8768267a9baSMark Brown */ 8778267a9baSMark Brown 8788267a9baSMark Brown #define WM831X_EPE_BASE 6 8798267a9baSMark Brown 8808267a9baSMark Brown static struct regulator_ops wm831x_epe_ops = { 8813d138fccSMark Brown .is_enabled = regulator_is_enabled_regmap, 8823d138fccSMark Brown .enable = regulator_enable_regmap, 8833d138fccSMark Brown .disable = regulator_disable_regmap, 8848267a9baSMark Brown .get_status = wm831x_dcdc_get_status, 8858267a9baSMark Brown }; 8868267a9baSMark Brown 8878267a9baSMark Brown static __devinit int wm831x_epe_probe(struct platform_device *pdev) 8888267a9baSMark Brown { 8898267a9baSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 8908267a9baSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 891c172708dSMark Brown struct regulator_config config = { }; 8928267a9baSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->epe); 8938267a9baSMark Brown struct wm831x_dcdc *dcdc; 8948267a9baSMark Brown int ret; 8958267a9baSMark Brown 8968267a9baSMark Brown dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1); 8978267a9baSMark Brown 8984c60165dSAxel Lin dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL); 8998267a9baSMark Brown if (dcdc == NULL) { 9008267a9baSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 9018267a9baSMark Brown return -ENOMEM; 9028267a9baSMark Brown } 9038267a9baSMark Brown 9048267a9baSMark Brown dcdc->wm831x = wm831x; 9058267a9baSMark Brown 9068267a9baSMark Brown /* For current parts this is correct; probably need to revisit 9078267a9baSMark Brown * in future. 9088267a9baSMark Brown */ 9098267a9baSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1); 9108267a9baSMark Brown dcdc->desc.name = dcdc->name; 9118267a9baSMark Brown dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */ 9128267a9baSMark Brown dcdc->desc.ops = &wm831x_epe_ops; 9138267a9baSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 9148267a9baSMark Brown dcdc->desc.owner = THIS_MODULE; 9153d138fccSMark Brown dcdc->desc.enable_reg = WM831X_DCDC_ENABLE; 9163d138fccSMark Brown dcdc->desc.enable_mask = 1 << dcdc->desc.id; 9178267a9baSMark Brown 918c172708dSMark Brown config.dev = pdev->dev.parent; 919b7ca8788SMark Brown if (pdata) 920c172708dSMark Brown config.init_data = pdata->epe[id]; 921c172708dSMark Brown config.driver_data = dcdc; 9223d138fccSMark Brown config.regmap = wm831x->regmap; 923c172708dSMark Brown 924c172708dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &config); 9258267a9baSMark Brown if (IS_ERR(dcdc->regulator)) { 9268267a9baSMark Brown ret = PTR_ERR(dcdc->regulator); 9278267a9baSMark Brown dev_err(wm831x->dev, "Failed to register EPE%d: %d\n", 9288267a9baSMark Brown id + 1, ret); 9298267a9baSMark Brown goto err; 9308267a9baSMark Brown } 9318267a9baSMark Brown 9328267a9baSMark Brown platform_set_drvdata(pdev, dcdc); 9338267a9baSMark Brown 9348267a9baSMark Brown return 0; 9358267a9baSMark Brown 9368267a9baSMark Brown err: 9378267a9baSMark Brown return ret; 9388267a9baSMark Brown } 9398267a9baSMark Brown 9408267a9baSMark Brown static __devexit int wm831x_epe_remove(struct platform_device *pdev) 9418267a9baSMark Brown { 9428267a9baSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 9438267a9baSMark Brown 944eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 9458267a9baSMark Brown regulator_unregister(dcdc->regulator); 9468267a9baSMark Brown 9478267a9baSMark Brown return 0; 9488267a9baSMark Brown } 9498267a9baSMark Brown 9508267a9baSMark Brown static struct platform_driver wm831x_epe_driver = { 9518267a9baSMark Brown .probe = wm831x_epe_probe, 9528267a9baSMark Brown .remove = __devexit_p(wm831x_epe_remove), 9538267a9baSMark Brown .driver = { 9548267a9baSMark Brown .name = "wm831x-epe", 955eb66d565SDmitry Torokhov .owner = THIS_MODULE, 9568267a9baSMark Brown }, 9578267a9baSMark Brown }; 9588267a9baSMark Brown 959e4ee831fSMark Brown static int __init wm831x_dcdc_init(void) 960e4ee831fSMark Brown { 961e4ee831fSMark Brown int ret; 962e4ee831fSMark Brown ret = platform_driver_register(&wm831x_buckv_driver); 963e4ee831fSMark Brown if (ret != 0) 964e4ee831fSMark Brown pr_err("Failed to register WM831x BUCKV driver: %d\n", ret); 965e4ee831fSMark Brown 966e4ee831fSMark Brown ret = platform_driver_register(&wm831x_buckp_driver); 967e4ee831fSMark Brown if (ret != 0) 968e4ee831fSMark Brown pr_err("Failed to register WM831x BUCKP driver: %d\n", ret); 969e4ee831fSMark Brown 9701304850dSMark Brown ret = platform_driver_register(&wm831x_boostp_driver); 9711304850dSMark Brown if (ret != 0) 9721304850dSMark Brown pr_err("Failed to register WM831x BOOST driver: %d\n", ret); 9731304850dSMark Brown 9748267a9baSMark Brown ret = platform_driver_register(&wm831x_epe_driver); 9758267a9baSMark Brown if (ret != 0) 9768267a9baSMark Brown pr_err("Failed to register WM831x EPE driver: %d\n", ret); 9778267a9baSMark Brown 978e4ee831fSMark Brown return 0; 979e4ee831fSMark Brown } 980e4ee831fSMark Brown subsys_initcall(wm831x_dcdc_init); 981e4ee831fSMark Brown 982e4ee831fSMark Brown static void __exit wm831x_dcdc_exit(void) 983e4ee831fSMark Brown { 9848267a9baSMark Brown platform_driver_unregister(&wm831x_epe_driver); 9851304850dSMark Brown platform_driver_unregister(&wm831x_boostp_driver); 986e4ee831fSMark Brown platform_driver_unregister(&wm831x_buckp_driver); 987e4ee831fSMark Brown platform_driver_unregister(&wm831x_buckv_driver); 988e4ee831fSMark Brown } 989e4ee831fSMark Brown module_exit(wm831x_dcdc_exit); 990e4ee831fSMark Brown 991e4ee831fSMark Brown /* Module information */ 992e4ee831fSMark Brown MODULE_AUTHOR("Mark Brown"); 993e4ee831fSMark Brown MODULE_DESCRIPTION("WM831x DC-DC convertor driver"); 994e4ee831fSMark Brown MODULE_LICENSE("GPL"); 995e4ee831fSMark Brown MODULE_ALIAS("platform:wm831x-buckv"); 996e4ee831fSMark Brown MODULE_ALIAS("platform:wm831x-buckp"); 99724b43150SMark Brown MODULE_ALIAS("platform:wm831x-epe"); 998