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 38e4ee831fSMark Brown #define WM831X_DCDC_MAX_NAME 6 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]; 53e4ee831fSMark Brown struct regulator_desc desc; 54e4ee831fSMark Brown int base; 55e4ee831fSMark Brown struct wm831x *wm831x; 56e4ee831fSMark Brown struct regulator_dev *regulator; 57e24a04c4SMark Brown int dvs_gpio; 58e24a04c4SMark Brown int dvs_gpio_state; 59e24a04c4SMark Brown int on_vsel; 60e24a04c4SMark Brown int dvs_vsel; 61e4ee831fSMark Brown }; 62e4ee831fSMark Brown 63e4ee831fSMark Brown static int wm831x_dcdc_is_enabled(struct regulator_dev *rdev) 64e4ee831fSMark Brown { 65e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 66e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 67e4ee831fSMark Brown int mask = 1 << rdev_get_id(rdev); 68e4ee831fSMark Brown int reg; 69e4ee831fSMark Brown 70e4ee831fSMark Brown reg = wm831x_reg_read(wm831x, WM831X_DCDC_ENABLE); 71e4ee831fSMark Brown if (reg < 0) 72e4ee831fSMark Brown return reg; 73e4ee831fSMark Brown 74e4ee831fSMark Brown if (reg & mask) 75e4ee831fSMark Brown return 1; 76e4ee831fSMark Brown else 77e4ee831fSMark Brown return 0; 78e4ee831fSMark Brown } 79e4ee831fSMark Brown 80e4ee831fSMark Brown static int wm831x_dcdc_enable(struct regulator_dev *rdev) 81e4ee831fSMark Brown { 82e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 83e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 84e4ee831fSMark Brown int mask = 1 << rdev_get_id(rdev); 85e4ee831fSMark Brown 86e4ee831fSMark Brown return wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, mask, mask); 87e4ee831fSMark Brown } 88e4ee831fSMark Brown 89e4ee831fSMark Brown static int wm831x_dcdc_disable(struct regulator_dev *rdev) 90e4ee831fSMark Brown { 91e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 92e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 93e4ee831fSMark Brown int mask = 1 << rdev_get_id(rdev); 94e4ee831fSMark Brown 95e4ee831fSMark Brown return wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, mask, 0); 96e4ee831fSMark Brown } 97e4ee831fSMark Brown 98e4ee831fSMark Brown static unsigned int wm831x_dcdc_get_mode(struct regulator_dev *rdev) 99e4ee831fSMark Brown 100e4ee831fSMark Brown { 101e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 102e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 103e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 104e4ee831fSMark Brown int val; 105e4ee831fSMark Brown 106e4ee831fSMark Brown val = wm831x_reg_read(wm831x, reg); 107e4ee831fSMark Brown if (val < 0) 108e4ee831fSMark Brown return val; 109e4ee831fSMark Brown 110e4ee831fSMark Brown val = (val & WM831X_DC1_ON_MODE_MASK) >> WM831X_DC1_ON_MODE_SHIFT; 111e4ee831fSMark Brown 112e4ee831fSMark Brown switch (val) { 113e4ee831fSMark Brown case WM831X_DCDC_MODE_FAST: 114e4ee831fSMark Brown return REGULATOR_MODE_FAST; 115e4ee831fSMark Brown case WM831X_DCDC_MODE_NORMAL: 116e4ee831fSMark Brown return REGULATOR_MODE_NORMAL; 117e4ee831fSMark Brown case WM831X_DCDC_MODE_STANDBY: 118e4ee831fSMark Brown return REGULATOR_MODE_STANDBY; 119e4ee831fSMark Brown case WM831X_DCDC_MODE_IDLE: 120e4ee831fSMark Brown return REGULATOR_MODE_IDLE; 121e4ee831fSMark Brown default: 122e4ee831fSMark Brown BUG(); 1239ee291a4SMark Brown return -EINVAL; 124e4ee831fSMark Brown } 125e4ee831fSMark Brown } 126e4ee831fSMark Brown 127e4ee831fSMark Brown static int wm831x_dcdc_set_mode_int(struct wm831x *wm831x, int reg, 128e4ee831fSMark Brown unsigned int mode) 129e4ee831fSMark Brown { 130e4ee831fSMark Brown int val; 131e4ee831fSMark Brown 132e4ee831fSMark Brown switch (mode) { 133e4ee831fSMark Brown case REGULATOR_MODE_FAST: 134e4ee831fSMark Brown val = WM831X_DCDC_MODE_FAST; 135e4ee831fSMark Brown break; 136e4ee831fSMark Brown case REGULATOR_MODE_NORMAL: 137e4ee831fSMark Brown val = WM831X_DCDC_MODE_NORMAL; 138e4ee831fSMark Brown break; 139e4ee831fSMark Brown case REGULATOR_MODE_STANDBY: 140e4ee831fSMark Brown val = WM831X_DCDC_MODE_STANDBY; 141e4ee831fSMark Brown break; 142e4ee831fSMark Brown case REGULATOR_MODE_IDLE: 143e4ee831fSMark Brown val = WM831X_DCDC_MODE_IDLE; 144e4ee831fSMark Brown break; 145e4ee831fSMark Brown default: 146e4ee831fSMark Brown return -EINVAL; 147e4ee831fSMark Brown } 148e4ee831fSMark Brown 149e4ee831fSMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC1_ON_MODE_MASK, 150e4ee831fSMark Brown val << WM831X_DC1_ON_MODE_SHIFT); 151e4ee831fSMark Brown } 152e4ee831fSMark Brown 153e4ee831fSMark Brown static int wm831x_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode) 154e4ee831fSMark Brown { 155e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 156e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 157e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 158e4ee831fSMark Brown 159e4ee831fSMark Brown return wm831x_dcdc_set_mode_int(wm831x, reg, mode); 160e4ee831fSMark Brown } 161e4ee831fSMark Brown 162e4ee831fSMark Brown static int wm831x_dcdc_set_suspend_mode(struct regulator_dev *rdev, 163e4ee831fSMark Brown unsigned int mode) 164e4ee831fSMark Brown { 165e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 166e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 167e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 168e4ee831fSMark Brown 169e4ee831fSMark Brown return wm831x_dcdc_set_mode_int(wm831x, reg, mode); 170e4ee831fSMark Brown } 171e4ee831fSMark Brown 172e4ee831fSMark Brown static int wm831x_dcdc_get_status(struct regulator_dev *rdev) 173e4ee831fSMark Brown { 174e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 175e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 176e4ee831fSMark Brown int ret; 177e4ee831fSMark Brown 178e4ee831fSMark Brown /* First, check for errors */ 179e4ee831fSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); 180e4ee831fSMark Brown if (ret < 0) 181e4ee831fSMark Brown return ret; 182e4ee831fSMark Brown 183e4ee831fSMark Brown if (ret & (1 << rdev_get_id(rdev))) { 184e4ee831fSMark Brown dev_dbg(wm831x->dev, "DCDC%d under voltage\n", 185e4ee831fSMark Brown rdev_get_id(rdev) + 1); 186e4ee831fSMark Brown return REGULATOR_STATUS_ERROR; 187e4ee831fSMark Brown } 188e4ee831fSMark Brown 189e4ee831fSMark Brown /* DCDC1 and DCDC2 can additionally detect high voltage/current */ 190e4ee831fSMark Brown if (rdev_get_id(rdev) < 2) { 191e4ee831fSMark Brown if (ret & (WM831X_DC1_OV_STS << rdev_get_id(rdev))) { 192e4ee831fSMark Brown dev_dbg(wm831x->dev, "DCDC%d over voltage\n", 193e4ee831fSMark Brown rdev_get_id(rdev) + 1); 194e4ee831fSMark Brown return REGULATOR_STATUS_ERROR; 195e4ee831fSMark Brown } 196e4ee831fSMark Brown 197e4ee831fSMark Brown if (ret & (WM831X_DC1_HC_STS << rdev_get_id(rdev))) { 198e4ee831fSMark Brown dev_dbg(wm831x->dev, "DCDC%d over current\n", 199e4ee831fSMark Brown rdev_get_id(rdev) + 1); 200e4ee831fSMark Brown return REGULATOR_STATUS_ERROR; 201e4ee831fSMark Brown } 202e4ee831fSMark Brown } 203e4ee831fSMark Brown 204e4ee831fSMark Brown /* Is the regulator on? */ 205e4ee831fSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); 206e4ee831fSMark Brown if (ret < 0) 207e4ee831fSMark Brown return ret; 208e4ee831fSMark Brown if (!(ret & (1 << rdev_get_id(rdev)))) 209e4ee831fSMark Brown return REGULATOR_STATUS_OFF; 210e4ee831fSMark Brown 211e4ee831fSMark Brown /* TODO: When we handle hardware control modes so we can report the 212e4ee831fSMark Brown * current mode. */ 213e4ee831fSMark Brown return REGULATOR_STATUS_ON; 214e4ee831fSMark Brown } 215e4ee831fSMark Brown 216e4ee831fSMark Brown static irqreturn_t wm831x_dcdc_uv_irq(int irq, void *data) 217e4ee831fSMark Brown { 218e4ee831fSMark Brown struct wm831x_dcdc *dcdc = data; 219e4ee831fSMark Brown 220e4ee831fSMark Brown regulator_notifier_call_chain(dcdc->regulator, 221e4ee831fSMark Brown REGULATOR_EVENT_UNDER_VOLTAGE, 222e4ee831fSMark Brown NULL); 223e4ee831fSMark Brown 224e4ee831fSMark Brown return IRQ_HANDLED; 225e4ee831fSMark Brown } 226e4ee831fSMark Brown 227e4ee831fSMark Brown static irqreturn_t wm831x_dcdc_oc_irq(int irq, void *data) 228e4ee831fSMark Brown { 229e4ee831fSMark Brown struct wm831x_dcdc *dcdc = data; 230e4ee831fSMark Brown 231e4ee831fSMark Brown regulator_notifier_call_chain(dcdc->regulator, 232e4ee831fSMark Brown REGULATOR_EVENT_OVER_CURRENT, 233e4ee831fSMark Brown NULL); 234e4ee831fSMark Brown 235e4ee831fSMark Brown return IRQ_HANDLED; 236e4ee831fSMark Brown } 237e4ee831fSMark Brown 238e4ee831fSMark Brown /* 239e4ee831fSMark Brown * BUCKV specifics 240e4ee831fSMark Brown */ 241e4ee831fSMark Brown 242e4ee831fSMark Brown static int wm831x_buckv_list_voltage(struct regulator_dev *rdev, 243e4ee831fSMark Brown unsigned selector) 244e4ee831fSMark Brown { 245e4ee831fSMark Brown if (selector <= 0x8) 246e4ee831fSMark Brown return 600000; 247e4ee831fSMark Brown if (selector <= WM831X_BUCKV_MAX_SELECTOR) 248e4ee831fSMark Brown return 600000 + ((selector - 0x8) * 12500); 249e4ee831fSMark Brown return -EINVAL; 250e4ee831fSMark Brown } 251e4ee831fSMark Brown 252e24a04c4SMark Brown static int wm831x_buckv_select_min_voltage(struct regulator_dev *rdev, 253e4ee831fSMark Brown int min_uV, int max_uV) 254e4ee831fSMark Brown { 255e4ee831fSMark Brown u16 vsel; 256e4ee831fSMark Brown 257e4ee831fSMark Brown if (min_uV < 600000) 258e4ee831fSMark Brown vsel = 0; 259e4ee831fSMark Brown else if (min_uV <= 1800000) 260e4ee831fSMark Brown vsel = ((min_uV - 600000) / 12500) + 8; 261e4ee831fSMark Brown else 262e4ee831fSMark Brown return -EINVAL; 263e4ee831fSMark Brown 264e4ee831fSMark Brown if (wm831x_buckv_list_voltage(rdev, vsel) > max_uV) 265e4ee831fSMark Brown return -EINVAL; 266e4ee831fSMark Brown 267e24a04c4SMark Brown return vsel; 268e24a04c4SMark Brown } 269e24a04c4SMark Brown 270e24a04c4SMark Brown static int wm831x_buckv_set_dvs(struct regulator_dev *rdev, int state) 271e24a04c4SMark Brown { 272e24a04c4SMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 273e24a04c4SMark Brown 274e24a04c4SMark Brown if (state == dcdc->dvs_gpio_state) 275e24a04c4SMark Brown return 0; 276e24a04c4SMark Brown 277e24a04c4SMark Brown dcdc->dvs_gpio_state = state; 278e24a04c4SMark Brown gpio_set_value(dcdc->dvs_gpio, state); 279e24a04c4SMark Brown 280e24a04c4SMark Brown /* Should wait for DVS state change to be asserted if we have 281e24a04c4SMark Brown * a GPIO for it, for now assume the device is configured 282e24a04c4SMark Brown * for the fastest possible transition. 283e24a04c4SMark Brown */ 284e24a04c4SMark Brown 285e24a04c4SMark Brown return 0; 286e4ee831fSMark Brown } 287e4ee831fSMark Brown 288e4ee831fSMark Brown static int wm831x_buckv_set_voltage(struct regulator_dev *rdev, 2893a93f2a9SMark Brown int min_uV, int max_uV, unsigned *selector) 290e4ee831fSMark Brown { 291e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 292e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 293e24a04c4SMark Brown int on_reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 294e24a04c4SMark Brown int dvs_reg = dcdc->base + WM831X_DCDC_DVS_CONTROL; 295e24a04c4SMark Brown int vsel, ret; 296e4ee831fSMark Brown 297e24a04c4SMark Brown vsel = wm831x_buckv_select_min_voltage(rdev, min_uV, max_uV); 298e24a04c4SMark Brown if (vsel < 0) 299e24a04c4SMark Brown return vsel; 300e24a04c4SMark Brown 3013a93f2a9SMark Brown *selector = vsel; 3023a93f2a9SMark Brown 303e24a04c4SMark Brown /* If this value is already set then do a GPIO update if we can */ 304e24a04c4SMark Brown if (dcdc->dvs_gpio && dcdc->on_vsel == vsel) 305e24a04c4SMark Brown return wm831x_buckv_set_dvs(rdev, 0); 306e24a04c4SMark Brown 307e24a04c4SMark Brown if (dcdc->dvs_gpio && dcdc->dvs_vsel == vsel) 308e24a04c4SMark Brown return wm831x_buckv_set_dvs(rdev, 1); 309e24a04c4SMark Brown 310e24a04c4SMark Brown /* Always set the ON status to the minimum voltage */ 311e24a04c4SMark Brown ret = wm831x_set_bits(wm831x, on_reg, WM831X_DC1_ON_VSEL_MASK, vsel); 312e24a04c4SMark Brown if (ret < 0) 313e24a04c4SMark Brown return ret; 314e24a04c4SMark Brown dcdc->on_vsel = vsel; 315e24a04c4SMark Brown 316e24a04c4SMark Brown if (!dcdc->dvs_gpio) 317e24a04c4SMark Brown return ret; 318e24a04c4SMark Brown 319e24a04c4SMark Brown /* Kick the voltage transition now */ 320e24a04c4SMark Brown ret = wm831x_buckv_set_dvs(rdev, 0); 321e24a04c4SMark Brown if (ret < 0) 322e24a04c4SMark Brown return ret; 323e24a04c4SMark Brown 32488cda60eSMark Brown /* 32588cda60eSMark Brown * If this VSEL is higher than the last one we've seen then 32688cda60eSMark Brown * remember it as the DVS VSEL. This is optimised for CPUfreq 32788cda60eSMark Brown * usage where we want to get to the highest voltage very 32888cda60eSMark Brown * quickly. 32988cda60eSMark Brown */ 33088cda60eSMark Brown if (vsel > dcdc->dvs_vsel) { 33188cda60eSMark Brown ret = wm831x_set_bits(wm831x, dvs_reg, 33288cda60eSMark Brown WM831X_DC1_DVS_VSEL_MASK, 33388cda60eSMark Brown dcdc->dvs_vsel); 334e24a04c4SMark Brown if (ret == 0) 335e24a04c4SMark Brown dcdc->dvs_vsel = vsel; 336e24a04c4SMark Brown else 33788cda60eSMark Brown dev_warn(wm831x->dev, 33888cda60eSMark Brown "Failed to set DCDC DVS VSEL: %d\n", ret); 33988cda60eSMark Brown } 340e24a04c4SMark Brown 341e24a04c4SMark Brown return 0; 342e4ee831fSMark Brown } 343e4ee831fSMark Brown 344e4ee831fSMark Brown static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev, 345e4ee831fSMark Brown int uV) 346e4ee831fSMark Brown { 347e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 348e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 349e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 350e24a04c4SMark Brown int vsel; 351e4ee831fSMark Brown 352e24a04c4SMark Brown vsel = wm831x_buckv_select_min_voltage(rdev, uV, uV); 353e24a04c4SMark Brown if (vsel < 0) 354e24a04c4SMark Brown return vsel; 355e24a04c4SMark Brown 356e24a04c4SMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC1_SLP_VSEL_MASK, vsel); 357e4ee831fSMark Brown } 358e4ee831fSMark Brown 359afb8bb80SMark Brown static int wm831x_buckv_get_voltage_sel(struct regulator_dev *rdev) 360e4ee831fSMark Brown { 361e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 362e4ee831fSMark Brown 363e24a04c4SMark Brown if (dcdc->dvs_gpio && dcdc->dvs_gpio_state) 364afb8bb80SMark Brown return dcdc->dvs_vsel; 365e24a04c4SMark Brown else 366afb8bb80SMark Brown return dcdc->on_vsel; 367e4ee831fSMark Brown } 368e4ee831fSMark Brown 369e4ee831fSMark Brown /* Current limit options */ 370e4ee831fSMark Brown static u16 wm831x_dcdc_ilim[] = { 371e4ee831fSMark Brown 125, 250, 375, 500, 625, 750, 875, 1000 372e4ee831fSMark Brown }; 373e4ee831fSMark Brown 374e4ee831fSMark Brown static int wm831x_buckv_set_current_limit(struct regulator_dev *rdev, 375e4ee831fSMark Brown int min_uA, int max_uA) 376e4ee831fSMark Brown { 377e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 378e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 379e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; 380e4ee831fSMark Brown int i; 381e4ee831fSMark Brown 382e4ee831fSMark Brown for (i = 0; i < ARRAY_SIZE(wm831x_dcdc_ilim); i++) { 383a171e782SAxel Lin if ((min_uA <= wm831x_dcdc_ilim[i]) && 384a171e782SAxel Lin (wm831x_dcdc_ilim[i] <= max_uA)) 385e4ee831fSMark Brown break; 386e4ee831fSMark Brown } 387e4ee831fSMark Brown if (i == ARRAY_SIZE(wm831x_dcdc_ilim)) 388e4ee831fSMark Brown return -EINVAL; 389e4ee831fSMark Brown 39009bf14b9SAxel Lin return wm831x_set_bits(wm831x, reg, WM831X_DC1_HC_THR_MASK, 39109bf14b9SAxel Lin i << WM831X_DC1_HC_THR_SHIFT); 392e4ee831fSMark Brown } 393e4ee831fSMark Brown 394e4ee831fSMark Brown static int wm831x_buckv_get_current_limit(struct regulator_dev *rdev) 395e4ee831fSMark Brown { 396e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 397e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 398e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; 399e4ee831fSMark Brown int val; 400e4ee831fSMark Brown 401e4ee831fSMark Brown val = wm831x_reg_read(wm831x, reg); 402e4ee831fSMark Brown if (val < 0) 403e4ee831fSMark Brown return val; 404e4ee831fSMark Brown 40509bf14b9SAxel Lin val = (val & WM831X_DC1_HC_THR_MASK) >> WM831X_DC1_HC_THR_SHIFT; 40609bf14b9SAxel Lin return wm831x_dcdc_ilim[val]; 407e4ee831fSMark Brown } 408e4ee831fSMark Brown 409e4ee831fSMark Brown static struct regulator_ops wm831x_buckv_ops = { 410e4ee831fSMark Brown .set_voltage = wm831x_buckv_set_voltage, 411afb8bb80SMark Brown .get_voltage_sel = wm831x_buckv_get_voltage_sel, 412e4ee831fSMark Brown .list_voltage = wm831x_buckv_list_voltage, 413e4ee831fSMark Brown .set_suspend_voltage = wm831x_buckv_set_suspend_voltage, 414e4ee831fSMark Brown .set_current_limit = wm831x_buckv_set_current_limit, 415e4ee831fSMark Brown .get_current_limit = wm831x_buckv_get_current_limit, 416e4ee831fSMark Brown 417e4ee831fSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 418e4ee831fSMark Brown .enable = wm831x_dcdc_enable, 419e4ee831fSMark Brown .disable = wm831x_dcdc_disable, 420e4ee831fSMark Brown .get_status = wm831x_dcdc_get_status, 421e4ee831fSMark Brown .get_mode = wm831x_dcdc_get_mode, 422e4ee831fSMark Brown .set_mode = wm831x_dcdc_set_mode, 423e4ee831fSMark Brown .set_suspend_mode = wm831x_dcdc_set_suspend_mode, 424e4ee831fSMark Brown }; 425e4ee831fSMark Brown 426e24a04c4SMark Brown /* 427e24a04c4SMark Brown * Set up DVS control. We just log errors since we can still run 428e24a04c4SMark Brown * (with reduced performance) if we fail. 429e24a04c4SMark Brown */ 430e24a04c4SMark Brown static __devinit void wm831x_buckv_dvs_init(struct wm831x_dcdc *dcdc, 431e24a04c4SMark Brown struct wm831x_buckv_pdata *pdata) 432e24a04c4SMark Brown { 433e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 434e24a04c4SMark Brown int ret; 435e24a04c4SMark Brown u16 ctrl; 436e24a04c4SMark Brown 437e24a04c4SMark Brown if (!pdata || !pdata->dvs_gpio) 438e24a04c4SMark Brown return; 439e24a04c4SMark Brown 440e24a04c4SMark Brown ret = gpio_request(pdata->dvs_gpio, "DCDC DVS"); 441e24a04c4SMark Brown if (ret < 0) { 442e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to get %s DVS GPIO: %d\n", 443e24a04c4SMark Brown dcdc->name, ret); 444e24a04c4SMark Brown return; 445e24a04c4SMark Brown } 446e24a04c4SMark Brown 447e24a04c4SMark Brown /* gpiolib won't let us read the GPIO status so pick the higher 448e24a04c4SMark Brown * of the two existing voltages so we take it as platform data. 449e24a04c4SMark Brown */ 450e24a04c4SMark Brown dcdc->dvs_gpio_state = pdata->dvs_init_state; 451e24a04c4SMark Brown 452e24a04c4SMark Brown ret = gpio_direction_output(pdata->dvs_gpio, dcdc->dvs_gpio_state); 453e24a04c4SMark Brown if (ret < 0) { 454e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to enable %s DVS GPIO: %d\n", 455e24a04c4SMark Brown dcdc->name, ret); 456e24a04c4SMark Brown gpio_free(pdata->dvs_gpio); 457e24a04c4SMark Brown return; 458e24a04c4SMark Brown } 459e24a04c4SMark Brown 460e24a04c4SMark Brown dcdc->dvs_gpio = pdata->dvs_gpio; 461b47ba9fdSMark Brown 462b47ba9fdSMark Brown switch (pdata->dvs_control_src) { 463b47ba9fdSMark Brown case 1: 464b47ba9fdSMark Brown ctrl = 2 << WM831X_DC1_DVS_SRC_SHIFT; 465b47ba9fdSMark Brown break; 466b47ba9fdSMark Brown case 2: 467b47ba9fdSMark Brown ctrl = 3 << WM831X_DC1_DVS_SRC_SHIFT; 468b47ba9fdSMark Brown break; 469b47ba9fdSMark Brown default: 470b47ba9fdSMark Brown dev_err(wm831x->dev, "Invalid DVS control source %d for %s\n", 471b47ba9fdSMark Brown pdata->dvs_control_src, dcdc->name); 472b47ba9fdSMark Brown return; 473b47ba9fdSMark Brown } 474b47ba9fdSMark Brown 475c439b8f4SMark Brown /* If DVS_VSEL is set to the minimum value then raise it to ON_VSEL 476c439b8f4SMark Brown * to make bootstrapping a bit smoother. 477c439b8f4SMark Brown */ 478c439b8f4SMark Brown if (!dcdc->dvs_vsel) { 479c439b8f4SMark Brown ret = wm831x_set_bits(wm831x, 480c439b8f4SMark Brown dcdc->base + WM831X_DCDC_DVS_CONTROL, 481c439b8f4SMark Brown WM831X_DC1_DVS_VSEL_MASK, dcdc->on_vsel); 482c439b8f4SMark Brown if (ret == 0) 483c439b8f4SMark Brown dcdc->dvs_vsel = dcdc->on_vsel; 484c439b8f4SMark Brown else 485c439b8f4SMark Brown dev_warn(wm831x->dev, "Failed to set DVS_VSEL: %d\n", 486c439b8f4SMark Brown ret); 487c439b8f4SMark Brown } 488c439b8f4SMark Brown 489b47ba9fdSMark Brown ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL, 490b47ba9fdSMark Brown WM831X_DC1_DVS_SRC_MASK, ctrl); 491b47ba9fdSMark Brown if (ret < 0) { 492b47ba9fdSMark Brown dev_err(wm831x->dev, "Failed to set %s DVS source: %d\n", 493b47ba9fdSMark Brown dcdc->name, ret); 494b47ba9fdSMark Brown } 495e24a04c4SMark Brown } 496e24a04c4SMark Brown 497e4ee831fSMark Brown static __devinit int wm831x_buckv_probe(struct platform_device *pdev) 498e4ee831fSMark Brown { 499e4ee831fSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 500e4ee831fSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 501c172708dSMark Brown struct regulator_config config = { }; 502137a6354SMark Brown int id; 503e4ee831fSMark Brown struct wm831x_dcdc *dcdc; 504e4ee831fSMark Brown struct resource *res; 505e4ee831fSMark Brown int ret, irq; 506e4ee831fSMark Brown 507137a6354SMark Brown if (pdata && pdata->wm831x_num) 508137a6354SMark Brown id = (pdata->wm831x_num * 10) + 1; 509137a6354SMark Brown else 510137a6354SMark Brown id = 0; 511137a6354SMark Brown id = pdev->id - id; 512137a6354SMark Brown 513e4ee831fSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 514e4ee831fSMark Brown 515e4ee831fSMark Brown if (pdata == NULL || pdata->dcdc[id] == NULL) 516e4ee831fSMark Brown return -ENODEV; 517e4ee831fSMark Brown 518fded2f4fSMark Brown dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), 519fded2f4fSMark Brown GFP_KERNEL); 520e4ee831fSMark Brown if (dcdc == NULL) { 521e4ee831fSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 522e4ee831fSMark Brown return -ENOMEM; 523e4ee831fSMark Brown } 524e4ee831fSMark Brown 525e4ee831fSMark Brown dcdc->wm831x = wm831x; 526e4ee831fSMark Brown 527e4ee831fSMark Brown res = platform_get_resource(pdev, IORESOURCE_IO, 0); 528e4ee831fSMark Brown if (res == NULL) { 529e4ee831fSMark Brown dev_err(&pdev->dev, "No I/O resource\n"); 530e4ee831fSMark Brown ret = -EINVAL; 531e4ee831fSMark Brown goto err; 532e4ee831fSMark Brown } 533e4ee831fSMark Brown dcdc->base = res->start; 534e4ee831fSMark Brown 535e4ee831fSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 536e4ee831fSMark Brown dcdc->desc.name = dcdc->name; 537e4ee831fSMark Brown dcdc->desc.id = id; 538e4ee831fSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 539e4ee831fSMark Brown dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1; 540e4ee831fSMark Brown dcdc->desc.ops = &wm831x_buckv_ops; 541e4ee831fSMark Brown dcdc->desc.owner = THIS_MODULE; 542e4ee831fSMark Brown 543e24a04c4SMark Brown ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG); 544e24a04c4SMark Brown if (ret < 0) { 545e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to read ON VSEL: %d\n", ret); 546e24a04c4SMark Brown goto err; 547e24a04c4SMark Brown } 548e24a04c4SMark Brown dcdc->on_vsel = ret & WM831X_DC1_ON_VSEL_MASK; 549e24a04c4SMark Brown 550a1b81dd3SMark Brown ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL); 551e24a04c4SMark Brown if (ret < 0) { 552e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to read DVS VSEL: %d\n", ret); 553e24a04c4SMark Brown goto err; 554e24a04c4SMark Brown } 555e24a04c4SMark Brown dcdc->dvs_vsel = ret & WM831X_DC1_DVS_VSEL_MASK; 556e24a04c4SMark Brown 557e24a04c4SMark Brown if (pdata->dcdc[id]) 558e24a04c4SMark Brown wm831x_buckv_dvs_init(dcdc, pdata->dcdc[id]->driver_data); 559e24a04c4SMark Brown 560c172708dSMark Brown config.dev = pdev->dev.parent; 561c172708dSMark Brown config.init_data = pdata->dcdc[id]; 562c172708dSMark Brown config.driver_data = dcdc; 563c172708dSMark Brown 564c172708dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &config); 565e4ee831fSMark Brown if (IS_ERR(dcdc->regulator)) { 566e4ee831fSMark Brown ret = PTR_ERR(dcdc->regulator); 567e4ee831fSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 568e4ee831fSMark Brown id + 1, ret); 569e4ee831fSMark Brown goto err; 570e4ee831fSMark Brown } 571e4ee831fSMark Brown 572e4ee831fSMark Brown irq = platform_get_irq_byname(pdev, "UV"); 573dfda9c27SMark Brown ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, 574dfda9c27SMark Brown IRQF_TRIGGER_RISING, dcdc->name, dcdc); 575e4ee831fSMark Brown if (ret != 0) { 576e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 577e4ee831fSMark Brown irq, ret); 578e4ee831fSMark Brown goto err_regulator; 579e4ee831fSMark Brown } 580e4ee831fSMark Brown 581e4ee831fSMark Brown irq = platform_get_irq_byname(pdev, "HC"); 582dfda9c27SMark Brown ret = request_threaded_irq(irq, NULL, wm831x_dcdc_oc_irq, 583dfda9c27SMark Brown IRQF_TRIGGER_RISING, dcdc->name, dcdc); 584e4ee831fSMark Brown if (ret != 0) { 585e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n", 586e4ee831fSMark Brown irq, ret); 587e4ee831fSMark Brown goto err_uv; 588e4ee831fSMark Brown } 589e4ee831fSMark Brown 590e4ee831fSMark Brown platform_set_drvdata(pdev, dcdc); 591e4ee831fSMark Brown 592e4ee831fSMark Brown return 0; 593e4ee831fSMark Brown 594e4ee831fSMark Brown err_uv: 595dfda9c27SMark Brown free_irq(platform_get_irq_byname(pdev, "UV"), dcdc); 596e4ee831fSMark Brown err_regulator: 597e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 598e4ee831fSMark Brown err: 599e24a04c4SMark Brown if (dcdc->dvs_gpio) 600e24a04c4SMark Brown gpio_free(dcdc->dvs_gpio); 601e4ee831fSMark Brown return ret; 602e4ee831fSMark Brown } 603e4ee831fSMark Brown 604e4ee831fSMark Brown static __devexit int wm831x_buckv_remove(struct platform_device *pdev) 605e4ee831fSMark Brown { 606e4ee831fSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 607e4ee831fSMark Brown 608eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 609eb66d565SDmitry Torokhov 61069952369SMark Brown free_irq(platform_get_irq_byname(pdev, "HC"), dcdc); 61169952369SMark Brown free_irq(platform_get_irq_byname(pdev, "UV"), dcdc); 612e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 613e24a04c4SMark Brown if (dcdc->dvs_gpio) 614e24a04c4SMark Brown gpio_free(dcdc->dvs_gpio); 615e4ee831fSMark Brown 616e4ee831fSMark Brown return 0; 617e4ee831fSMark Brown } 618e4ee831fSMark Brown 619e4ee831fSMark Brown static struct platform_driver wm831x_buckv_driver = { 620e4ee831fSMark Brown .probe = wm831x_buckv_probe, 621e4ee831fSMark Brown .remove = __devexit_p(wm831x_buckv_remove), 622e4ee831fSMark Brown .driver = { 623e4ee831fSMark Brown .name = "wm831x-buckv", 624eb66d565SDmitry Torokhov .owner = THIS_MODULE, 625e4ee831fSMark Brown }, 626e4ee831fSMark Brown }; 627e4ee831fSMark Brown 628e4ee831fSMark Brown /* 629e4ee831fSMark Brown * BUCKP specifics 630e4ee831fSMark Brown */ 631e4ee831fSMark Brown 632e4ee831fSMark Brown static int wm831x_buckp_list_voltage(struct regulator_dev *rdev, 633e4ee831fSMark Brown unsigned selector) 634e4ee831fSMark Brown { 635e4ee831fSMark Brown if (selector <= WM831X_BUCKP_MAX_SELECTOR) 636e4ee831fSMark Brown return 850000 + (selector * 25000); 637e4ee831fSMark Brown else 638e4ee831fSMark Brown return -EINVAL; 639e4ee831fSMark Brown } 640e4ee831fSMark Brown 641e4ee831fSMark Brown static int wm831x_buckp_set_voltage_int(struct regulator_dev *rdev, int reg, 6423a93f2a9SMark Brown int min_uV, int max_uV, int *selector) 643e4ee831fSMark Brown { 644e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 645e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 646e4ee831fSMark Brown u16 vsel; 647e4ee831fSMark Brown 648e4ee831fSMark Brown if (min_uV <= 34000000) 649e4ee831fSMark Brown vsel = (min_uV - 850000) / 25000; 650e4ee831fSMark Brown else 651e4ee831fSMark Brown return -EINVAL; 652e4ee831fSMark Brown 653e4ee831fSMark Brown if (wm831x_buckp_list_voltage(rdev, vsel) > max_uV) 654e4ee831fSMark Brown return -EINVAL; 655e4ee831fSMark Brown 6563a93f2a9SMark Brown *selector = vsel; 6573a93f2a9SMark Brown 658e4ee831fSMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, vsel); 659e4ee831fSMark Brown } 660e4ee831fSMark Brown 661e4ee831fSMark Brown static int wm831x_buckp_set_voltage(struct regulator_dev *rdev, 6623a93f2a9SMark Brown int min_uV, int max_uV, 6633a93f2a9SMark Brown unsigned *selector) 664e4ee831fSMark Brown { 665e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 666e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 667e4ee831fSMark Brown 6683a93f2a9SMark Brown return wm831x_buckp_set_voltage_int(rdev, reg, min_uV, max_uV, 6693a93f2a9SMark Brown selector); 670e4ee831fSMark Brown } 671e4ee831fSMark Brown 672e4ee831fSMark Brown static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev, 673e4ee831fSMark Brown int uV) 674e4ee831fSMark Brown { 675e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 676e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 6773a93f2a9SMark Brown unsigned selector; 678e4ee831fSMark Brown 6793a93f2a9SMark Brown return wm831x_buckp_set_voltage_int(rdev, reg, uV, uV, &selector); 680e4ee831fSMark Brown } 681e4ee831fSMark Brown 682e4ee831fSMark Brown static struct regulator_ops wm831x_buckp_ops = { 683e4ee831fSMark Brown .set_voltage = wm831x_buckp_set_voltage, 684817436e7SMark Brown .get_voltage_sel = regulator_get_voltage_sel_regmap, 685e4ee831fSMark Brown .list_voltage = wm831x_buckp_list_voltage, 686e4ee831fSMark Brown .set_suspend_voltage = wm831x_buckp_set_suspend_voltage, 687e4ee831fSMark Brown 688e4ee831fSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 689e4ee831fSMark Brown .enable = wm831x_dcdc_enable, 690e4ee831fSMark Brown .disable = wm831x_dcdc_disable, 691e4ee831fSMark Brown .get_status = wm831x_dcdc_get_status, 692e4ee831fSMark Brown .get_mode = wm831x_dcdc_get_mode, 693e4ee831fSMark Brown .set_mode = wm831x_dcdc_set_mode, 694e4ee831fSMark Brown .set_suspend_mode = wm831x_dcdc_set_suspend_mode, 695e4ee831fSMark Brown }; 696e4ee831fSMark Brown 697e4ee831fSMark Brown static __devinit int wm831x_buckp_probe(struct platform_device *pdev) 698e4ee831fSMark Brown { 699e4ee831fSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 700e4ee831fSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 701c172708dSMark Brown struct regulator_config config = { }; 702137a6354SMark Brown int id; 703e4ee831fSMark Brown struct wm831x_dcdc *dcdc; 704e4ee831fSMark Brown struct resource *res; 705e4ee831fSMark Brown int ret, irq; 706e4ee831fSMark Brown 707137a6354SMark Brown if (pdata && pdata->wm831x_num) 708137a6354SMark Brown id = (pdata->wm831x_num * 10) + 1; 709137a6354SMark Brown else 710137a6354SMark Brown id = 0; 711137a6354SMark Brown id = pdev->id - id; 712137a6354SMark Brown 713e4ee831fSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 714e4ee831fSMark Brown 715e4ee831fSMark Brown if (pdata == NULL || pdata->dcdc[id] == NULL) 716e4ee831fSMark Brown return -ENODEV; 717e4ee831fSMark Brown 718fded2f4fSMark Brown dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), 719fded2f4fSMark Brown GFP_KERNEL); 720e4ee831fSMark Brown if (dcdc == NULL) { 721e4ee831fSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 722e4ee831fSMark Brown return -ENOMEM; 723e4ee831fSMark Brown } 724e4ee831fSMark Brown 725e4ee831fSMark Brown dcdc->wm831x = wm831x; 726e4ee831fSMark Brown 727e4ee831fSMark Brown res = platform_get_resource(pdev, IORESOURCE_IO, 0); 728e4ee831fSMark Brown if (res == NULL) { 729e4ee831fSMark Brown dev_err(&pdev->dev, "No I/O resource\n"); 730e4ee831fSMark Brown ret = -EINVAL; 731e4ee831fSMark Brown goto err; 732e4ee831fSMark Brown } 733e4ee831fSMark Brown dcdc->base = res->start; 734e4ee831fSMark Brown 735e4ee831fSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 736e4ee831fSMark Brown dcdc->desc.name = dcdc->name; 737e4ee831fSMark Brown dcdc->desc.id = id; 738e4ee831fSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 739e4ee831fSMark Brown dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1; 740e4ee831fSMark Brown dcdc->desc.ops = &wm831x_buckp_ops; 741e4ee831fSMark Brown dcdc->desc.owner = THIS_MODULE; 742817436e7SMark Brown dcdc->desc.vsel_reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 743817436e7SMark Brown dcdc->desc.vsel_mask = WM831X_DC3_ON_VSEL_MASK; 744e4ee831fSMark Brown 745c172708dSMark Brown config.dev = pdev->dev.parent; 746c172708dSMark Brown config.init_data = pdata->dcdc[id]; 747c172708dSMark Brown config.driver_data = dcdc; 748817436e7SMark Brown config.regmap = wm831x->regmap; 749c172708dSMark Brown 750c172708dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &config); 751e4ee831fSMark Brown if (IS_ERR(dcdc->regulator)) { 752e4ee831fSMark Brown ret = PTR_ERR(dcdc->regulator); 753e4ee831fSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 754e4ee831fSMark Brown id + 1, ret); 755e4ee831fSMark Brown goto err; 756e4ee831fSMark Brown } 757e4ee831fSMark Brown 758e4ee831fSMark Brown irq = platform_get_irq_byname(pdev, "UV"); 759dfda9c27SMark Brown ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, 760dfda9c27SMark Brown IRQF_TRIGGER_RISING, dcdc->name, dcdc); 761e4ee831fSMark Brown if (ret != 0) { 762e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 763e4ee831fSMark Brown irq, ret); 764e4ee831fSMark Brown goto err_regulator; 765e4ee831fSMark Brown } 766e4ee831fSMark Brown 767e4ee831fSMark Brown platform_set_drvdata(pdev, dcdc); 768e4ee831fSMark Brown 769e4ee831fSMark Brown return 0; 770e4ee831fSMark Brown 771e4ee831fSMark Brown err_regulator: 772e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 773e4ee831fSMark Brown err: 774e4ee831fSMark Brown return ret; 775e4ee831fSMark Brown } 776e4ee831fSMark Brown 777e4ee831fSMark Brown static __devexit int wm831x_buckp_remove(struct platform_device *pdev) 778e4ee831fSMark Brown { 779e4ee831fSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 780e4ee831fSMark Brown 781eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 782eb66d565SDmitry Torokhov 78369952369SMark Brown free_irq(platform_get_irq_byname(pdev, "UV"), dcdc); 784e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 785e4ee831fSMark Brown 786e4ee831fSMark Brown return 0; 787e4ee831fSMark Brown } 788e4ee831fSMark Brown 789e4ee831fSMark Brown static struct platform_driver wm831x_buckp_driver = { 790e4ee831fSMark Brown .probe = wm831x_buckp_probe, 791e4ee831fSMark Brown .remove = __devexit_p(wm831x_buckp_remove), 792e4ee831fSMark Brown .driver = { 793e4ee831fSMark Brown .name = "wm831x-buckp", 794eb66d565SDmitry Torokhov .owner = THIS_MODULE, 795e4ee831fSMark Brown }, 796e4ee831fSMark Brown }; 797e4ee831fSMark Brown 7988267a9baSMark Brown /* 7991304850dSMark Brown * DCDC boost convertors 8001304850dSMark Brown */ 8011304850dSMark Brown 8021304850dSMark Brown static int wm831x_boostp_get_status(struct regulator_dev *rdev) 8031304850dSMark Brown { 8041304850dSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 8051304850dSMark Brown struct wm831x *wm831x = dcdc->wm831x; 8061304850dSMark Brown int ret; 8071304850dSMark Brown 8081304850dSMark Brown /* First, check for errors */ 8091304850dSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); 8101304850dSMark Brown if (ret < 0) 8111304850dSMark Brown return ret; 8121304850dSMark Brown 8131304850dSMark Brown if (ret & (1 << rdev_get_id(rdev))) { 8141304850dSMark Brown dev_dbg(wm831x->dev, "DCDC%d under voltage\n", 8151304850dSMark Brown rdev_get_id(rdev) + 1); 8161304850dSMark Brown return REGULATOR_STATUS_ERROR; 8171304850dSMark Brown } 8181304850dSMark Brown 8191304850dSMark Brown /* Is the regulator on? */ 8201304850dSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); 8211304850dSMark Brown if (ret < 0) 8221304850dSMark Brown return ret; 8231304850dSMark Brown if (ret & (1 << rdev_get_id(rdev))) 8241304850dSMark Brown return REGULATOR_STATUS_ON; 8251304850dSMark Brown else 8261304850dSMark Brown return REGULATOR_STATUS_OFF; 8271304850dSMark Brown } 8281304850dSMark Brown 8291304850dSMark Brown static struct regulator_ops wm831x_boostp_ops = { 8301304850dSMark Brown .get_status = wm831x_boostp_get_status, 8311304850dSMark Brown 8321304850dSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 8331304850dSMark Brown .enable = wm831x_dcdc_enable, 8341304850dSMark Brown .disable = wm831x_dcdc_disable, 8351304850dSMark Brown }; 8361304850dSMark Brown 8371304850dSMark Brown static __devinit int wm831x_boostp_probe(struct platform_device *pdev) 8381304850dSMark Brown { 8391304850dSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 8401304850dSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 841c172708dSMark Brown struct regulator_config config = { }; 8421304850dSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->dcdc); 8431304850dSMark Brown struct wm831x_dcdc *dcdc; 8441304850dSMark Brown struct resource *res; 8451304850dSMark Brown int ret, irq; 8461304850dSMark Brown 8471304850dSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 8481304850dSMark Brown 8491304850dSMark Brown if (pdata == NULL || pdata->dcdc[id] == NULL) 8501304850dSMark Brown return -ENODEV; 8511304850dSMark Brown 8524c60165dSAxel Lin dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL); 8531304850dSMark Brown if (dcdc == NULL) { 8541304850dSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 8551304850dSMark Brown return -ENOMEM; 8561304850dSMark Brown } 8571304850dSMark Brown 8581304850dSMark Brown dcdc->wm831x = wm831x; 8591304850dSMark Brown 8601304850dSMark Brown res = platform_get_resource(pdev, IORESOURCE_IO, 0); 8611304850dSMark Brown if (res == NULL) { 8621304850dSMark Brown dev_err(&pdev->dev, "No I/O resource\n"); 8631304850dSMark Brown ret = -EINVAL; 8641304850dSMark Brown goto err; 8651304850dSMark Brown } 8661304850dSMark Brown dcdc->base = res->start; 8671304850dSMark Brown 8681304850dSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 8691304850dSMark Brown dcdc->desc.name = dcdc->name; 8701304850dSMark Brown dcdc->desc.id = id; 8711304850dSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 8721304850dSMark Brown dcdc->desc.ops = &wm831x_boostp_ops; 8731304850dSMark Brown dcdc->desc.owner = THIS_MODULE; 8741304850dSMark Brown 875c172708dSMark Brown config.dev = pdev->dev.parent; 876c172708dSMark Brown config.init_data = pdata->dcdc[id]; 877c172708dSMark Brown config.driver_data = dcdc; 878c172708dSMark Brown 879c172708dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &config); 8801304850dSMark Brown if (IS_ERR(dcdc->regulator)) { 8811304850dSMark Brown ret = PTR_ERR(dcdc->regulator); 8821304850dSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 8831304850dSMark Brown id + 1, ret); 8841304850dSMark Brown goto err; 8851304850dSMark Brown } 8861304850dSMark Brown 8871304850dSMark Brown irq = platform_get_irq_byname(pdev, "UV"); 888dfda9c27SMark Brown ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, 8891304850dSMark Brown IRQF_TRIGGER_RISING, dcdc->name, 8901304850dSMark Brown dcdc); 8911304850dSMark Brown if (ret != 0) { 8921304850dSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 8931304850dSMark Brown irq, ret); 8941304850dSMark Brown goto err_regulator; 8951304850dSMark Brown } 8961304850dSMark Brown 8971304850dSMark Brown platform_set_drvdata(pdev, dcdc); 8981304850dSMark Brown 8991304850dSMark Brown return 0; 9001304850dSMark Brown 9011304850dSMark Brown err_regulator: 9021304850dSMark Brown regulator_unregister(dcdc->regulator); 9031304850dSMark Brown err: 9041304850dSMark Brown return ret; 9051304850dSMark Brown } 9061304850dSMark Brown 9071304850dSMark Brown static __devexit int wm831x_boostp_remove(struct platform_device *pdev) 9081304850dSMark Brown { 9091304850dSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 9101304850dSMark Brown 911eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 912eb66d565SDmitry Torokhov 913dfda9c27SMark Brown free_irq(platform_get_irq_byname(pdev, "UV"), dcdc); 9141304850dSMark Brown regulator_unregister(dcdc->regulator); 9151304850dSMark Brown 9161304850dSMark Brown return 0; 9171304850dSMark Brown } 9181304850dSMark Brown 9191304850dSMark Brown static struct platform_driver wm831x_boostp_driver = { 9201304850dSMark Brown .probe = wm831x_boostp_probe, 9211304850dSMark Brown .remove = __devexit_p(wm831x_boostp_remove), 9221304850dSMark Brown .driver = { 9231304850dSMark Brown .name = "wm831x-boostp", 924eb66d565SDmitry Torokhov .owner = THIS_MODULE, 9251304850dSMark Brown }, 9261304850dSMark Brown }; 9271304850dSMark Brown 9281304850dSMark Brown /* 9298267a9baSMark Brown * External Power Enable 9308267a9baSMark Brown * 9318267a9baSMark Brown * These aren't actually DCDCs but look like them in hardware so share 9328267a9baSMark Brown * code. 9338267a9baSMark Brown */ 9348267a9baSMark Brown 9358267a9baSMark Brown #define WM831X_EPE_BASE 6 9368267a9baSMark Brown 9378267a9baSMark Brown static struct regulator_ops wm831x_epe_ops = { 9388267a9baSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 9398267a9baSMark Brown .enable = wm831x_dcdc_enable, 9408267a9baSMark Brown .disable = wm831x_dcdc_disable, 9418267a9baSMark Brown .get_status = wm831x_dcdc_get_status, 9428267a9baSMark Brown }; 9438267a9baSMark Brown 9448267a9baSMark Brown static __devinit int wm831x_epe_probe(struct platform_device *pdev) 9458267a9baSMark Brown { 9468267a9baSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 9478267a9baSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 948c172708dSMark Brown struct regulator_config config = { }; 9498267a9baSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->epe); 9508267a9baSMark Brown struct wm831x_dcdc *dcdc; 9518267a9baSMark Brown int ret; 9528267a9baSMark Brown 9538267a9baSMark Brown dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1); 9548267a9baSMark Brown 9558267a9baSMark Brown if (pdata == NULL || pdata->epe[id] == NULL) 9568267a9baSMark Brown return -ENODEV; 9578267a9baSMark Brown 9584c60165dSAxel Lin dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL); 9598267a9baSMark Brown if (dcdc == NULL) { 9608267a9baSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 9618267a9baSMark Brown return -ENOMEM; 9628267a9baSMark Brown } 9638267a9baSMark Brown 9648267a9baSMark Brown dcdc->wm831x = wm831x; 9658267a9baSMark Brown 9668267a9baSMark Brown /* For current parts this is correct; probably need to revisit 9678267a9baSMark Brown * in future. 9688267a9baSMark Brown */ 9698267a9baSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1); 9708267a9baSMark Brown dcdc->desc.name = dcdc->name; 9718267a9baSMark Brown dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */ 9728267a9baSMark Brown dcdc->desc.ops = &wm831x_epe_ops; 9738267a9baSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 9748267a9baSMark Brown dcdc->desc.owner = THIS_MODULE; 9758267a9baSMark Brown 976c172708dSMark Brown config.dev = pdev->dev.parent; 977c172708dSMark Brown config.init_data = pdata->epe[id]; 978c172708dSMark Brown config.driver_data = dcdc; 979c172708dSMark Brown 980c172708dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &config); 9818267a9baSMark Brown if (IS_ERR(dcdc->regulator)) { 9828267a9baSMark Brown ret = PTR_ERR(dcdc->regulator); 9838267a9baSMark Brown dev_err(wm831x->dev, "Failed to register EPE%d: %d\n", 9848267a9baSMark Brown id + 1, ret); 9858267a9baSMark Brown goto err; 9868267a9baSMark Brown } 9878267a9baSMark Brown 9888267a9baSMark Brown platform_set_drvdata(pdev, dcdc); 9898267a9baSMark Brown 9908267a9baSMark Brown return 0; 9918267a9baSMark Brown 9928267a9baSMark Brown err: 9938267a9baSMark Brown return ret; 9948267a9baSMark Brown } 9958267a9baSMark Brown 9968267a9baSMark Brown static __devexit int wm831x_epe_remove(struct platform_device *pdev) 9978267a9baSMark Brown { 9988267a9baSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 9998267a9baSMark Brown 1000eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 10018267a9baSMark Brown regulator_unregister(dcdc->regulator); 10028267a9baSMark Brown 10038267a9baSMark Brown return 0; 10048267a9baSMark Brown } 10058267a9baSMark Brown 10068267a9baSMark Brown static struct platform_driver wm831x_epe_driver = { 10078267a9baSMark Brown .probe = wm831x_epe_probe, 10088267a9baSMark Brown .remove = __devexit_p(wm831x_epe_remove), 10098267a9baSMark Brown .driver = { 10108267a9baSMark Brown .name = "wm831x-epe", 1011eb66d565SDmitry Torokhov .owner = THIS_MODULE, 10128267a9baSMark Brown }, 10138267a9baSMark Brown }; 10148267a9baSMark Brown 1015e4ee831fSMark Brown static int __init wm831x_dcdc_init(void) 1016e4ee831fSMark Brown { 1017e4ee831fSMark Brown int ret; 1018e4ee831fSMark Brown ret = platform_driver_register(&wm831x_buckv_driver); 1019e4ee831fSMark Brown if (ret != 0) 1020e4ee831fSMark Brown pr_err("Failed to register WM831x BUCKV driver: %d\n", ret); 1021e4ee831fSMark Brown 1022e4ee831fSMark Brown ret = platform_driver_register(&wm831x_buckp_driver); 1023e4ee831fSMark Brown if (ret != 0) 1024e4ee831fSMark Brown pr_err("Failed to register WM831x BUCKP driver: %d\n", ret); 1025e4ee831fSMark Brown 10261304850dSMark Brown ret = platform_driver_register(&wm831x_boostp_driver); 10271304850dSMark Brown if (ret != 0) 10281304850dSMark Brown pr_err("Failed to register WM831x BOOST driver: %d\n", ret); 10291304850dSMark Brown 10308267a9baSMark Brown ret = platform_driver_register(&wm831x_epe_driver); 10318267a9baSMark Brown if (ret != 0) 10328267a9baSMark Brown pr_err("Failed to register WM831x EPE driver: %d\n", ret); 10338267a9baSMark Brown 1034e4ee831fSMark Brown return 0; 1035e4ee831fSMark Brown } 1036e4ee831fSMark Brown subsys_initcall(wm831x_dcdc_init); 1037e4ee831fSMark Brown 1038e4ee831fSMark Brown static void __exit wm831x_dcdc_exit(void) 1039e4ee831fSMark Brown { 10408267a9baSMark Brown platform_driver_unregister(&wm831x_epe_driver); 10411304850dSMark Brown platform_driver_unregister(&wm831x_boostp_driver); 1042e4ee831fSMark Brown platform_driver_unregister(&wm831x_buckp_driver); 1043e4ee831fSMark Brown platform_driver_unregister(&wm831x_buckv_driver); 1044e4ee831fSMark Brown } 1045e4ee831fSMark Brown module_exit(wm831x_dcdc_exit); 1046e4ee831fSMark Brown 1047e4ee831fSMark Brown /* Module information */ 1048e4ee831fSMark Brown MODULE_AUTHOR("Mark Brown"); 1049e4ee831fSMark Brown MODULE_DESCRIPTION("WM831x DC-DC convertor driver"); 1050e4ee831fSMark Brown MODULE_LICENSE("GPL"); 1051e4ee831fSMark Brown MODULE_ALIAS("platform:wm831x-buckv"); 1052e4ee831fSMark Brown MODULE_ALIAS("platform:wm831x-buckp"); 105324b43150SMark Brown MODULE_ALIAS("platform:wm831x-epe"); 1054