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 int wm831x_dcdc_is_enabled(struct regulator_dev *rdev) 65e4ee831fSMark Brown { 66e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 67e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 68e4ee831fSMark Brown int mask = 1 << rdev_get_id(rdev); 69e4ee831fSMark Brown int reg; 70e4ee831fSMark Brown 71e4ee831fSMark Brown reg = wm831x_reg_read(wm831x, WM831X_DCDC_ENABLE); 72e4ee831fSMark Brown if (reg < 0) 73e4ee831fSMark Brown return reg; 74e4ee831fSMark Brown 75e4ee831fSMark Brown if (reg & mask) 76e4ee831fSMark Brown return 1; 77e4ee831fSMark Brown else 78e4ee831fSMark Brown return 0; 79e4ee831fSMark Brown } 80e4ee831fSMark Brown 81e4ee831fSMark Brown static int wm831x_dcdc_enable(struct regulator_dev *rdev) 82e4ee831fSMark Brown { 83e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 84e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 85e4ee831fSMark Brown int mask = 1 << rdev_get_id(rdev); 86e4ee831fSMark Brown 87e4ee831fSMark Brown return wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, mask, mask); 88e4ee831fSMark Brown } 89e4ee831fSMark Brown 90e4ee831fSMark Brown static int wm831x_dcdc_disable(struct regulator_dev *rdev) 91e4ee831fSMark Brown { 92e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 93e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 94e4ee831fSMark Brown int mask = 1 << rdev_get_id(rdev); 95e4ee831fSMark Brown 96e4ee831fSMark Brown return wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, mask, 0); 97e4ee831fSMark Brown } 98e4ee831fSMark Brown 99e4ee831fSMark Brown static unsigned int wm831x_dcdc_get_mode(struct regulator_dev *rdev) 100e4ee831fSMark Brown 101e4ee831fSMark Brown { 102e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 103e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 104e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 105e4ee831fSMark Brown int val; 106e4ee831fSMark Brown 107e4ee831fSMark Brown val = wm831x_reg_read(wm831x, reg); 108e4ee831fSMark Brown if (val < 0) 109e4ee831fSMark Brown return val; 110e4ee831fSMark Brown 111e4ee831fSMark Brown val = (val & WM831X_DC1_ON_MODE_MASK) >> WM831X_DC1_ON_MODE_SHIFT; 112e4ee831fSMark Brown 113e4ee831fSMark Brown switch (val) { 114e4ee831fSMark Brown case WM831X_DCDC_MODE_FAST: 115e4ee831fSMark Brown return REGULATOR_MODE_FAST; 116e4ee831fSMark Brown case WM831X_DCDC_MODE_NORMAL: 117e4ee831fSMark Brown return REGULATOR_MODE_NORMAL; 118e4ee831fSMark Brown case WM831X_DCDC_MODE_STANDBY: 119e4ee831fSMark Brown return REGULATOR_MODE_STANDBY; 120e4ee831fSMark Brown case WM831X_DCDC_MODE_IDLE: 121e4ee831fSMark Brown return REGULATOR_MODE_IDLE; 122e4ee831fSMark Brown default: 123e4ee831fSMark Brown BUG(); 1249ee291a4SMark Brown return -EINVAL; 125e4ee831fSMark Brown } 126e4ee831fSMark Brown } 127e4ee831fSMark Brown 128e4ee831fSMark Brown static int wm831x_dcdc_set_mode_int(struct wm831x *wm831x, int reg, 129e4ee831fSMark Brown unsigned int mode) 130e4ee831fSMark Brown { 131e4ee831fSMark Brown int val; 132e4ee831fSMark Brown 133e4ee831fSMark Brown switch (mode) { 134e4ee831fSMark Brown case REGULATOR_MODE_FAST: 135e4ee831fSMark Brown val = WM831X_DCDC_MODE_FAST; 136e4ee831fSMark Brown break; 137e4ee831fSMark Brown case REGULATOR_MODE_NORMAL: 138e4ee831fSMark Brown val = WM831X_DCDC_MODE_NORMAL; 139e4ee831fSMark Brown break; 140e4ee831fSMark Brown case REGULATOR_MODE_STANDBY: 141e4ee831fSMark Brown val = WM831X_DCDC_MODE_STANDBY; 142e4ee831fSMark Brown break; 143e4ee831fSMark Brown case REGULATOR_MODE_IDLE: 144e4ee831fSMark Brown val = WM831X_DCDC_MODE_IDLE; 145e4ee831fSMark Brown break; 146e4ee831fSMark Brown default: 147e4ee831fSMark Brown return -EINVAL; 148e4ee831fSMark Brown } 149e4ee831fSMark Brown 150e4ee831fSMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC1_ON_MODE_MASK, 151e4ee831fSMark Brown val << WM831X_DC1_ON_MODE_SHIFT); 152e4ee831fSMark Brown } 153e4ee831fSMark Brown 154e4ee831fSMark Brown static int wm831x_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode) 155e4ee831fSMark Brown { 156e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 157e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 158e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 159e4ee831fSMark Brown 160e4ee831fSMark Brown return wm831x_dcdc_set_mode_int(wm831x, reg, mode); 161e4ee831fSMark Brown } 162e4ee831fSMark Brown 163e4ee831fSMark Brown static int wm831x_dcdc_set_suspend_mode(struct regulator_dev *rdev, 164e4ee831fSMark Brown unsigned int mode) 165e4ee831fSMark Brown { 166e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 167e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 168e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 169e4ee831fSMark Brown 170e4ee831fSMark Brown return wm831x_dcdc_set_mode_int(wm831x, reg, mode); 171e4ee831fSMark Brown } 172e4ee831fSMark Brown 173e4ee831fSMark Brown static int wm831x_dcdc_get_status(struct regulator_dev *rdev) 174e4ee831fSMark Brown { 175e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 176e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 177e4ee831fSMark Brown int ret; 178e4ee831fSMark Brown 179e4ee831fSMark Brown /* First, check for errors */ 180e4ee831fSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); 181e4ee831fSMark Brown if (ret < 0) 182e4ee831fSMark Brown return ret; 183e4ee831fSMark Brown 184e4ee831fSMark Brown if (ret & (1 << rdev_get_id(rdev))) { 185e4ee831fSMark Brown dev_dbg(wm831x->dev, "DCDC%d under voltage\n", 186e4ee831fSMark Brown rdev_get_id(rdev) + 1); 187e4ee831fSMark Brown return REGULATOR_STATUS_ERROR; 188e4ee831fSMark Brown } 189e4ee831fSMark Brown 190e4ee831fSMark Brown /* DCDC1 and DCDC2 can additionally detect high voltage/current */ 191e4ee831fSMark Brown if (rdev_get_id(rdev) < 2) { 192e4ee831fSMark Brown if (ret & (WM831X_DC1_OV_STS << rdev_get_id(rdev))) { 193e4ee831fSMark Brown dev_dbg(wm831x->dev, "DCDC%d over voltage\n", 194e4ee831fSMark Brown rdev_get_id(rdev) + 1); 195e4ee831fSMark Brown return REGULATOR_STATUS_ERROR; 196e4ee831fSMark Brown } 197e4ee831fSMark Brown 198e4ee831fSMark Brown if (ret & (WM831X_DC1_HC_STS << rdev_get_id(rdev))) { 199e4ee831fSMark Brown dev_dbg(wm831x->dev, "DCDC%d over current\n", 200e4ee831fSMark Brown rdev_get_id(rdev) + 1); 201e4ee831fSMark Brown return REGULATOR_STATUS_ERROR; 202e4ee831fSMark Brown } 203e4ee831fSMark Brown } 204e4ee831fSMark Brown 205e4ee831fSMark Brown /* Is the regulator on? */ 206e4ee831fSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); 207e4ee831fSMark Brown if (ret < 0) 208e4ee831fSMark Brown return ret; 209e4ee831fSMark Brown if (!(ret & (1 << rdev_get_id(rdev)))) 210e4ee831fSMark Brown return REGULATOR_STATUS_OFF; 211e4ee831fSMark Brown 212e4ee831fSMark Brown /* TODO: When we handle hardware control modes so we can report the 213e4ee831fSMark Brown * current mode. */ 214e4ee831fSMark Brown return REGULATOR_STATUS_ON; 215e4ee831fSMark Brown } 216e4ee831fSMark Brown 217e4ee831fSMark Brown static irqreturn_t wm831x_dcdc_uv_irq(int irq, void *data) 218e4ee831fSMark Brown { 219e4ee831fSMark Brown struct wm831x_dcdc *dcdc = data; 220e4ee831fSMark Brown 221e4ee831fSMark Brown regulator_notifier_call_chain(dcdc->regulator, 222e4ee831fSMark Brown REGULATOR_EVENT_UNDER_VOLTAGE, 223e4ee831fSMark Brown NULL); 224e4ee831fSMark Brown 225e4ee831fSMark Brown return IRQ_HANDLED; 226e4ee831fSMark Brown } 227e4ee831fSMark Brown 228e4ee831fSMark Brown static irqreturn_t wm831x_dcdc_oc_irq(int irq, void *data) 229e4ee831fSMark Brown { 230e4ee831fSMark Brown struct wm831x_dcdc *dcdc = data; 231e4ee831fSMark Brown 232e4ee831fSMark Brown regulator_notifier_call_chain(dcdc->regulator, 233e4ee831fSMark Brown REGULATOR_EVENT_OVER_CURRENT, 234e4ee831fSMark Brown NULL); 235e4ee831fSMark Brown 236e4ee831fSMark Brown return IRQ_HANDLED; 237e4ee831fSMark Brown } 238e4ee831fSMark Brown 239e4ee831fSMark Brown /* 240e4ee831fSMark Brown * BUCKV specifics 241e4ee831fSMark Brown */ 242e4ee831fSMark Brown 243e4ee831fSMark Brown static int wm831x_buckv_list_voltage(struct regulator_dev *rdev, 244e4ee831fSMark Brown unsigned selector) 245e4ee831fSMark Brown { 246e4ee831fSMark Brown if (selector <= 0x8) 247e4ee831fSMark Brown return 600000; 248e4ee831fSMark Brown if (selector <= WM831X_BUCKV_MAX_SELECTOR) 249e4ee831fSMark Brown return 600000 + ((selector - 0x8) * 12500); 250e4ee831fSMark Brown return -EINVAL; 251e4ee831fSMark Brown } 252e4ee831fSMark Brown 253e24a04c4SMark Brown static int wm831x_buckv_select_min_voltage(struct regulator_dev *rdev, 254e4ee831fSMark Brown int min_uV, int max_uV) 255e4ee831fSMark Brown { 256e4ee831fSMark Brown u16 vsel; 257e4ee831fSMark Brown 258e4ee831fSMark Brown if (min_uV < 600000) 259e4ee831fSMark Brown vsel = 0; 260e4ee831fSMark Brown else if (min_uV <= 1800000) 261e4ee831fSMark Brown vsel = ((min_uV - 600000) / 12500) + 8; 262e4ee831fSMark Brown else 263e4ee831fSMark Brown return -EINVAL; 264e4ee831fSMark Brown 265e4ee831fSMark Brown if (wm831x_buckv_list_voltage(rdev, vsel) > max_uV) 266e4ee831fSMark Brown return -EINVAL; 267e4ee831fSMark Brown 268e24a04c4SMark Brown return vsel; 269e24a04c4SMark Brown } 270e24a04c4SMark Brown 271e24a04c4SMark Brown static int wm831x_buckv_set_dvs(struct regulator_dev *rdev, int state) 272e24a04c4SMark Brown { 273e24a04c4SMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 274e24a04c4SMark Brown 275e24a04c4SMark Brown if (state == dcdc->dvs_gpio_state) 276e24a04c4SMark Brown return 0; 277e24a04c4SMark Brown 278e24a04c4SMark Brown dcdc->dvs_gpio_state = state; 279e24a04c4SMark Brown gpio_set_value(dcdc->dvs_gpio, state); 280e24a04c4SMark Brown 281e24a04c4SMark Brown /* Should wait for DVS state change to be asserted if we have 282e24a04c4SMark Brown * a GPIO for it, for now assume the device is configured 283e24a04c4SMark Brown * for the fastest possible transition. 284e24a04c4SMark Brown */ 285e24a04c4SMark Brown 286e24a04c4SMark Brown return 0; 287e4ee831fSMark Brown } 288e4ee831fSMark Brown 289e4ee831fSMark Brown static int wm831x_buckv_set_voltage(struct regulator_dev *rdev, 2903a93f2a9SMark Brown int min_uV, int max_uV, unsigned *selector) 291e4ee831fSMark Brown { 292e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 293e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 294e24a04c4SMark Brown int on_reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 295e24a04c4SMark Brown int dvs_reg = dcdc->base + WM831X_DCDC_DVS_CONTROL; 296e24a04c4SMark Brown int vsel, ret; 297e4ee831fSMark Brown 298e24a04c4SMark Brown vsel = wm831x_buckv_select_min_voltage(rdev, min_uV, max_uV); 299e24a04c4SMark Brown if (vsel < 0) 300e24a04c4SMark Brown return vsel; 301e24a04c4SMark Brown 3023a93f2a9SMark Brown *selector = vsel; 3033a93f2a9SMark Brown 304e24a04c4SMark Brown /* If this value is already set then do a GPIO update if we can */ 305e24a04c4SMark Brown if (dcdc->dvs_gpio && dcdc->on_vsel == vsel) 306e24a04c4SMark Brown return wm831x_buckv_set_dvs(rdev, 0); 307e24a04c4SMark Brown 308e24a04c4SMark Brown if (dcdc->dvs_gpio && dcdc->dvs_vsel == vsel) 309e24a04c4SMark Brown return wm831x_buckv_set_dvs(rdev, 1); 310e24a04c4SMark Brown 311e24a04c4SMark Brown /* Always set the ON status to the minimum voltage */ 312e24a04c4SMark Brown ret = wm831x_set_bits(wm831x, on_reg, WM831X_DC1_ON_VSEL_MASK, vsel); 313e24a04c4SMark Brown if (ret < 0) 314e24a04c4SMark Brown return ret; 315e24a04c4SMark Brown dcdc->on_vsel = vsel; 316e24a04c4SMark Brown 317e24a04c4SMark Brown if (!dcdc->dvs_gpio) 318e24a04c4SMark Brown return ret; 319e24a04c4SMark Brown 320e24a04c4SMark Brown /* Kick the voltage transition now */ 321e24a04c4SMark Brown ret = wm831x_buckv_set_dvs(rdev, 0); 322e24a04c4SMark Brown if (ret < 0) 323e24a04c4SMark Brown return ret; 324e24a04c4SMark Brown 32588cda60eSMark Brown /* 32688cda60eSMark Brown * If this VSEL is higher than the last one we've seen then 32788cda60eSMark Brown * remember it as the DVS VSEL. This is optimised for CPUfreq 32888cda60eSMark Brown * usage where we want to get to the highest voltage very 32988cda60eSMark Brown * quickly. 33088cda60eSMark Brown */ 33188cda60eSMark Brown if (vsel > dcdc->dvs_vsel) { 33288cda60eSMark Brown ret = wm831x_set_bits(wm831x, dvs_reg, 33388cda60eSMark Brown WM831X_DC1_DVS_VSEL_MASK, 33488cda60eSMark Brown dcdc->dvs_vsel); 335e24a04c4SMark Brown if (ret == 0) 336e24a04c4SMark Brown dcdc->dvs_vsel = vsel; 337e24a04c4SMark Brown else 33888cda60eSMark Brown dev_warn(wm831x->dev, 33988cda60eSMark Brown "Failed to set DCDC DVS VSEL: %d\n", ret); 34088cda60eSMark Brown } 341e24a04c4SMark Brown 342e24a04c4SMark Brown return 0; 343e4ee831fSMark Brown } 344e4ee831fSMark Brown 345e4ee831fSMark Brown static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev, 346e4ee831fSMark Brown int uV) 347e4ee831fSMark Brown { 348e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 349e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 350e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 351e24a04c4SMark Brown int vsel; 352e4ee831fSMark Brown 353e24a04c4SMark Brown vsel = wm831x_buckv_select_min_voltage(rdev, uV, uV); 354e24a04c4SMark Brown if (vsel < 0) 355e24a04c4SMark Brown return vsel; 356e24a04c4SMark Brown 357e24a04c4SMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC1_SLP_VSEL_MASK, vsel); 358e4ee831fSMark Brown } 359e4ee831fSMark Brown 360afb8bb80SMark Brown static int wm831x_buckv_get_voltage_sel(struct regulator_dev *rdev) 361e4ee831fSMark Brown { 362e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 363e4ee831fSMark Brown 364e24a04c4SMark Brown if (dcdc->dvs_gpio && dcdc->dvs_gpio_state) 365afb8bb80SMark Brown return dcdc->dvs_vsel; 366e24a04c4SMark Brown else 367afb8bb80SMark Brown return dcdc->on_vsel; 368e4ee831fSMark Brown } 369e4ee831fSMark Brown 370e4ee831fSMark Brown /* Current limit options */ 371e4ee831fSMark Brown static u16 wm831x_dcdc_ilim[] = { 372e4ee831fSMark Brown 125, 250, 375, 500, 625, 750, 875, 1000 373e4ee831fSMark Brown }; 374e4ee831fSMark Brown 375e4ee831fSMark Brown static int wm831x_buckv_set_current_limit(struct regulator_dev *rdev, 376e4ee831fSMark Brown int min_uA, int max_uA) 377e4ee831fSMark Brown { 378e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 379e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 380e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; 381e4ee831fSMark Brown int i; 382e4ee831fSMark Brown 383e4ee831fSMark Brown for (i = 0; i < ARRAY_SIZE(wm831x_dcdc_ilim); i++) { 384a171e782SAxel Lin if ((min_uA <= wm831x_dcdc_ilim[i]) && 385a171e782SAxel Lin (wm831x_dcdc_ilim[i] <= max_uA)) 386e4ee831fSMark Brown break; 387e4ee831fSMark Brown } 388e4ee831fSMark Brown if (i == ARRAY_SIZE(wm831x_dcdc_ilim)) 389e4ee831fSMark Brown return -EINVAL; 390e4ee831fSMark Brown 39109bf14b9SAxel Lin return wm831x_set_bits(wm831x, reg, WM831X_DC1_HC_THR_MASK, 39209bf14b9SAxel Lin i << WM831X_DC1_HC_THR_SHIFT); 393e4ee831fSMark Brown } 394e4ee831fSMark Brown 395e4ee831fSMark Brown static int wm831x_buckv_get_current_limit(struct regulator_dev *rdev) 396e4ee831fSMark Brown { 397e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 398e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 399e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; 400e4ee831fSMark Brown int val; 401e4ee831fSMark Brown 402e4ee831fSMark Brown val = wm831x_reg_read(wm831x, reg); 403e4ee831fSMark Brown if (val < 0) 404e4ee831fSMark Brown return val; 405e4ee831fSMark Brown 40609bf14b9SAxel Lin val = (val & WM831X_DC1_HC_THR_MASK) >> WM831X_DC1_HC_THR_SHIFT; 40709bf14b9SAxel Lin return wm831x_dcdc_ilim[val]; 408e4ee831fSMark Brown } 409e4ee831fSMark Brown 410e4ee831fSMark Brown static struct regulator_ops wm831x_buckv_ops = { 411e4ee831fSMark Brown .set_voltage = wm831x_buckv_set_voltage, 412afb8bb80SMark Brown .get_voltage_sel = wm831x_buckv_get_voltage_sel, 413e4ee831fSMark Brown .list_voltage = wm831x_buckv_list_voltage, 414e4ee831fSMark Brown .set_suspend_voltage = wm831x_buckv_set_suspend_voltage, 415e4ee831fSMark Brown .set_current_limit = wm831x_buckv_set_current_limit, 416e4ee831fSMark Brown .get_current_limit = wm831x_buckv_get_current_limit, 417e4ee831fSMark Brown 418e4ee831fSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 419e4ee831fSMark Brown .enable = wm831x_dcdc_enable, 420e4ee831fSMark Brown .disable = wm831x_dcdc_disable, 421e4ee831fSMark Brown .get_status = wm831x_dcdc_get_status, 422e4ee831fSMark Brown .get_mode = wm831x_dcdc_get_mode, 423e4ee831fSMark Brown .set_mode = wm831x_dcdc_set_mode, 424e4ee831fSMark Brown .set_suspend_mode = wm831x_dcdc_set_suspend_mode, 425e4ee831fSMark Brown }; 426e4ee831fSMark Brown 427e24a04c4SMark Brown /* 428e24a04c4SMark Brown * Set up DVS control. We just log errors since we can still run 429e24a04c4SMark Brown * (with reduced performance) if we fail. 430e24a04c4SMark Brown */ 431e24a04c4SMark Brown static __devinit void wm831x_buckv_dvs_init(struct wm831x_dcdc *dcdc, 432e24a04c4SMark Brown struct wm831x_buckv_pdata *pdata) 433e24a04c4SMark Brown { 434e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 435e24a04c4SMark Brown int ret; 436e24a04c4SMark Brown u16 ctrl; 437e24a04c4SMark Brown 438e24a04c4SMark Brown if (!pdata || !pdata->dvs_gpio) 439e24a04c4SMark Brown return; 440e24a04c4SMark Brown 441e24a04c4SMark Brown ret = gpio_request(pdata->dvs_gpio, "DCDC DVS"); 442e24a04c4SMark Brown if (ret < 0) { 443e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to get %s DVS GPIO: %d\n", 444e24a04c4SMark Brown dcdc->name, ret); 445e24a04c4SMark Brown return; 446e24a04c4SMark Brown } 447e24a04c4SMark Brown 448e24a04c4SMark Brown /* gpiolib won't let us read the GPIO status so pick the higher 449e24a04c4SMark Brown * of the two existing voltages so we take it as platform data. 450e24a04c4SMark Brown */ 451e24a04c4SMark Brown dcdc->dvs_gpio_state = pdata->dvs_init_state; 452e24a04c4SMark Brown 453e24a04c4SMark Brown ret = gpio_direction_output(pdata->dvs_gpio, dcdc->dvs_gpio_state); 454e24a04c4SMark Brown if (ret < 0) { 455e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to enable %s DVS GPIO: %d\n", 456e24a04c4SMark Brown dcdc->name, ret); 457e24a04c4SMark Brown gpio_free(pdata->dvs_gpio); 458e24a04c4SMark Brown return; 459e24a04c4SMark Brown } 460e24a04c4SMark Brown 461e24a04c4SMark Brown dcdc->dvs_gpio = pdata->dvs_gpio; 462b47ba9fdSMark Brown 463b47ba9fdSMark Brown switch (pdata->dvs_control_src) { 464b47ba9fdSMark Brown case 1: 465b47ba9fdSMark Brown ctrl = 2 << WM831X_DC1_DVS_SRC_SHIFT; 466b47ba9fdSMark Brown break; 467b47ba9fdSMark Brown case 2: 468b47ba9fdSMark Brown ctrl = 3 << WM831X_DC1_DVS_SRC_SHIFT; 469b47ba9fdSMark Brown break; 470b47ba9fdSMark Brown default: 471b47ba9fdSMark Brown dev_err(wm831x->dev, "Invalid DVS control source %d for %s\n", 472b47ba9fdSMark Brown pdata->dvs_control_src, dcdc->name); 473b47ba9fdSMark Brown return; 474b47ba9fdSMark Brown } 475b47ba9fdSMark Brown 476c439b8f4SMark Brown /* If DVS_VSEL is set to the minimum value then raise it to ON_VSEL 477c439b8f4SMark Brown * to make bootstrapping a bit smoother. 478c439b8f4SMark Brown */ 479c439b8f4SMark Brown if (!dcdc->dvs_vsel) { 480c439b8f4SMark Brown ret = wm831x_set_bits(wm831x, 481c439b8f4SMark Brown dcdc->base + WM831X_DCDC_DVS_CONTROL, 482c439b8f4SMark Brown WM831X_DC1_DVS_VSEL_MASK, dcdc->on_vsel); 483c439b8f4SMark Brown if (ret == 0) 484c439b8f4SMark Brown dcdc->dvs_vsel = dcdc->on_vsel; 485c439b8f4SMark Brown else 486c439b8f4SMark Brown dev_warn(wm831x->dev, "Failed to set DVS_VSEL: %d\n", 487c439b8f4SMark Brown ret); 488c439b8f4SMark Brown } 489c439b8f4SMark Brown 490b47ba9fdSMark Brown ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL, 491b47ba9fdSMark Brown WM831X_DC1_DVS_SRC_MASK, ctrl); 492b47ba9fdSMark Brown if (ret < 0) { 493b47ba9fdSMark Brown dev_err(wm831x->dev, "Failed to set %s DVS source: %d\n", 494b47ba9fdSMark Brown dcdc->name, ret); 495b47ba9fdSMark Brown } 496e24a04c4SMark Brown } 497e24a04c4SMark Brown 498e4ee831fSMark Brown static __devinit int wm831x_buckv_probe(struct platform_device *pdev) 499e4ee831fSMark Brown { 500e4ee831fSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 501e4ee831fSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 502c172708dSMark Brown struct regulator_config config = { }; 503137a6354SMark Brown int id; 504e4ee831fSMark Brown struct wm831x_dcdc *dcdc; 505e4ee831fSMark Brown struct resource *res; 506e4ee831fSMark Brown int ret, irq; 507e4ee831fSMark Brown 508137a6354SMark Brown if (pdata && pdata->wm831x_num) 509137a6354SMark Brown id = (pdata->wm831x_num * 10) + 1; 510137a6354SMark Brown else 511137a6354SMark Brown id = 0; 512137a6354SMark Brown id = pdev->id - id; 513137a6354SMark Brown 514e4ee831fSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 515e4ee831fSMark Brown 516e4ee831fSMark Brown if (pdata == NULL || pdata->dcdc[id] == NULL) 517e4ee831fSMark Brown return -ENODEV; 518e4ee831fSMark Brown 519fded2f4fSMark Brown dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), 520fded2f4fSMark Brown GFP_KERNEL); 521e4ee831fSMark Brown if (dcdc == NULL) { 522e4ee831fSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 523e4ee831fSMark Brown return -ENOMEM; 524e4ee831fSMark Brown } 525e4ee831fSMark Brown 526e4ee831fSMark Brown dcdc->wm831x = wm831x; 527e4ee831fSMark Brown 528e4ee831fSMark Brown res = platform_get_resource(pdev, IORESOURCE_IO, 0); 529e4ee831fSMark Brown if (res == NULL) { 530e4ee831fSMark Brown dev_err(&pdev->dev, "No I/O resource\n"); 531e4ee831fSMark Brown ret = -EINVAL; 532e4ee831fSMark Brown goto err; 533e4ee831fSMark Brown } 534e4ee831fSMark Brown dcdc->base = res->start; 535e4ee831fSMark Brown 536e4ee831fSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 537e4ee831fSMark Brown dcdc->desc.name = dcdc->name; 53882caa978SMark Brown 53982caa978SMark Brown snprintf(dcdc->supply_name, sizeof(dcdc->supply_name), 54082caa978SMark Brown "DC%dVDD", id + 1); 54182caa978SMark Brown dcdc->desc.supply_name = dcdc->supply_name; 54282caa978SMark Brown 543e4ee831fSMark Brown dcdc->desc.id = id; 544e4ee831fSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 545e4ee831fSMark Brown dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1; 546e4ee831fSMark Brown dcdc->desc.ops = &wm831x_buckv_ops; 547e4ee831fSMark Brown dcdc->desc.owner = THIS_MODULE; 548e4ee831fSMark Brown 549e24a04c4SMark Brown ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG); 550e24a04c4SMark Brown if (ret < 0) { 551e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to read ON VSEL: %d\n", ret); 552e24a04c4SMark Brown goto err; 553e24a04c4SMark Brown } 554e24a04c4SMark Brown dcdc->on_vsel = ret & WM831X_DC1_ON_VSEL_MASK; 555e24a04c4SMark Brown 556a1b81dd3SMark Brown ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL); 557e24a04c4SMark Brown if (ret < 0) { 558e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to read DVS VSEL: %d\n", ret); 559e24a04c4SMark Brown goto err; 560e24a04c4SMark Brown } 561e24a04c4SMark Brown dcdc->dvs_vsel = ret & WM831X_DC1_DVS_VSEL_MASK; 562e24a04c4SMark Brown 563e24a04c4SMark Brown if (pdata->dcdc[id]) 564e24a04c4SMark Brown wm831x_buckv_dvs_init(dcdc, pdata->dcdc[id]->driver_data); 565e24a04c4SMark Brown 566c172708dSMark Brown config.dev = pdev->dev.parent; 567c172708dSMark Brown config.init_data = pdata->dcdc[id]; 568c172708dSMark Brown config.driver_data = dcdc; 569c172708dSMark Brown 570c172708dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &config); 571e4ee831fSMark Brown if (IS_ERR(dcdc->regulator)) { 572e4ee831fSMark Brown ret = PTR_ERR(dcdc->regulator); 573e4ee831fSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 574e4ee831fSMark Brown id + 1, ret); 575e4ee831fSMark Brown goto err; 576e4ee831fSMark Brown } 577e4ee831fSMark Brown 578e4ee831fSMark Brown irq = platform_get_irq_byname(pdev, "UV"); 579dfda9c27SMark Brown ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, 580dfda9c27SMark Brown IRQF_TRIGGER_RISING, dcdc->name, dcdc); 581e4ee831fSMark Brown if (ret != 0) { 582e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 583e4ee831fSMark Brown irq, ret); 584e4ee831fSMark Brown goto err_regulator; 585e4ee831fSMark Brown } 586e4ee831fSMark Brown 587e4ee831fSMark Brown irq = platform_get_irq_byname(pdev, "HC"); 588dfda9c27SMark Brown ret = request_threaded_irq(irq, NULL, wm831x_dcdc_oc_irq, 589dfda9c27SMark Brown IRQF_TRIGGER_RISING, dcdc->name, dcdc); 590e4ee831fSMark Brown if (ret != 0) { 591e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n", 592e4ee831fSMark Brown irq, ret); 593e4ee831fSMark Brown goto err_uv; 594e4ee831fSMark Brown } 595e4ee831fSMark Brown 596e4ee831fSMark Brown platform_set_drvdata(pdev, dcdc); 597e4ee831fSMark Brown 598e4ee831fSMark Brown return 0; 599e4ee831fSMark Brown 600e4ee831fSMark Brown err_uv: 601dfda9c27SMark Brown free_irq(platform_get_irq_byname(pdev, "UV"), dcdc); 602e4ee831fSMark Brown err_regulator: 603e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 604e4ee831fSMark Brown err: 605e24a04c4SMark Brown if (dcdc->dvs_gpio) 606e24a04c4SMark Brown gpio_free(dcdc->dvs_gpio); 607e4ee831fSMark Brown return ret; 608e4ee831fSMark Brown } 609e4ee831fSMark Brown 610e4ee831fSMark Brown static __devexit int wm831x_buckv_remove(struct platform_device *pdev) 611e4ee831fSMark Brown { 612e4ee831fSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 613e4ee831fSMark Brown 614eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 615eb66d565SDmitry Torokhov 61669952369SMark Brown free_irq(platform_get_irq_byname(pdev, "HC"), dcdc); 61769952369SMark Brown free_irq(platform_get_irq_byname(pdev, "UV"), dcdc); 618e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 619e24a04c4SMark Brown if (dcdc->dvs_gpio) 620e24a04c4SMark Brown gpio_free(dcdc->dvs_gpio); 621e4ee831fSMark Brown 622e4ee831fSMark Brown return 0; 623e4ee831fSMark Brown } 624e4ee831fSMark Brown 625e4ee831fSMark Brown static struct platform_driver wm831x_buckv_driver = { 626e4ee831fSMark Brown .probe = wm831x_buckv_probe, 627e4ee831fSMark Brown .remove = __devexit_p(wm831x_buckv_remove), 628e4ee831fSMark Brown .driver = { 629e4ee831fSMark Brown .name = "wm831x-buckv", 630eb66d565SDmitry Torokhov .owner = THIS_MODULE, 631e4ee831fSMark Brown }, 632e4ee831fSMark Brown }; 633e4ee831fSMark Brown 634e4ee831fSMark Brown /* 635e4ee831fSMark Brown * BUCKP specifics 636e4ee831fSMark Brown */ 637e4ee831fSMark Brown 638e4ee831fSMark Brown static int wm831x_buckp_list_voltage(struct regulator_dev *rdev, 639e4ee831fSMark Brown unsigned selector) 640e4ee831fSMark Brown { 641e4ee831fSMark Brown if (selector <= WM831X_BUCKP_MAX_SELECTOR) 642e4ee831fSMark Brown return 850000 + (selector * 25000); 643e4ee831fSMark Brown else 644e4ee831fSMark Brown return -EINVAL; 645e4ee831fSMark Brown } 646e4ee831fSMark Brown 647e4ee831fSMark Brown static int wm831x_buckp_set_voltage_int(struct regulator_dev *rdev, int reg, 6483a93f2a9SMark Brown int min_uV, int max_uV, int *selector) 649e4ee831fSMark Brown { 650e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 651e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 652e4ee831fSMark Brown u16 vsel; 653e4ee831fSMark Brown 654e4ee831fSMark Brown if (min_uV <= 34000000) 655e4ee831fSMark Brown vsel = (min_uV - 850000) / 25000; 656e4ee831fSMark Brown else 657e4ee831fSMark Brown return -EINVAL; 658e4ee831fSMark Brown 659e4ee831fSMark Brown if (wm831x_buckp_list_voltage(rdev, vsel) > max_uV) 660e4ee831fSMark Brown return -EINVAL; 661e4ee831fSMark Brown 6623a93f2a9SMark Brown *selector = vsel; 6633a93f2a9SMark Brown 664e4ee831fSMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, vsel); 665e4ee831fSMark Brown } 666e4ee831fSMark Brown 667e4ee831fSMark Brown static int wm831x_buckp_set_voltage(struct regulator_dev *rdev, 6683a93f2a9SMark Brown int min_uV, int max_uV, 6693a93f2a9SMark Brown unsigned *selector) 670e4ee831fSMark Brown { 671e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 672e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 673e4ee831fSMark Brown 6743a93f2a9SMark Brown return wm831x_buckp_set_voltage_int(rdev, reg, min_uV, max_uV, 6753a93f2a9SMark Brown selector); 676e4ee831fSMark Brown } 677e4ee831fSMark Brown 678e4ee831fSMark Brown static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev, 679e4ee831fSMark Brown int uV) 680e4ee831fSMark Brown { 681e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 682e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 6833a93f2a9SMark Brown unsigned selector; 684e4ee831fSMark Brown 6853a93f2a9SMark Brown return wm831x_buckp_set_voltage_int(rdev, reg, uV, uV, &selector); 686e4ee831fSMark Brown } 687e4ee831fSMark Brown 688afb8bb80SMark Brown static int wm831x_buckp_get_voltage_sel(struct regulator_dev *rdev) 689e4ee831fSMark Brown { 690e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 691e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 692e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 693e4ee831fSMark Brown int val; 694e4ee831fSMark Brown 695e4ee831fSMark Brown val = wm831x_reg_read(wm831x, reg); 696e4ee831fSMark Brown if (val < 0) 697e4ee831fSMark Brown return val; 698e4ee831fSMark Brown 699afb8bb80SMark Brown return val & WM831X_DC3_ON_VSEL_MASK; 700e4ee831fSMark Brown } 701e4ee831fSMark Brown 702e4ee831fSMark Brown static struct regulator_ops wm831x_buckp_ops = { 703e4ee831fSMark Brown .set_voltage = wm831x_buckp_set_voltage, 704afb8bb80SMark Brown .get_voltage_sel = wm831x_buckp_get_voltage_sel, 705e4ee831fSMark Brown .list_voltage = wm831x_buckp_list_voltage, 706e4ee831fSMark Brown .set_suspend_voltage = wm831x_buckp_set_suspend_voltage, 707e4ee831fSMark Brown 708e4ee831fSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 709e4ee831fSMark Brown .enable = wm831x_dcdc_enable, 710e4ee831fSMark Brown .disable = wm831x_dcdc_disable, 711e4ee831fSMark Brown .get_status = wm831x_dcdc_get_status, 712e4ee831fSMark Brown .get_mode = wm831x_dcdc_get_mode, 713e4ee831fSMark Brown .set_mode = wm831x_dcdc_set_mode, 714e4ee831fSMark Brown .set_suspend_mode = wm831x_dcdc_set_suspend_mode, 715e4ee831fSMark Brown }; 716e4ee831fSMark Brown 717e4ee831fSMark Brown static __devinit int wm831x_buckp_probe(struct platform_device *pdev) 718e4ee831fSMark Brown { 719e4ee831fSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 720e4ee831fSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 721c172708dSMark Brown struct regulator_config config = { }; 722137a6354SMark Brown int id; 723e4ee831fSMark Brown struct wm831x_dcdc *dcdc; 724e4ee831fSMark Brown struct resource *res; 725e4ee831fSMark Brown int ret, irq; 726e4ee831fSMark Brown 727137a6354SMark Brown if (pdata && pdata->wm831x_num) 728137a6354SMark Brown id = (pdata->wm831x_num * 10) + 1; 729137a6354SMark Brown else 730137a6354SMark Brown id = 0; 731137a6354SMark Brown id = pdev->id - id; 732137a6354SMark Brown 733e4ee831fSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 734e4ee831fSMark Brown 735e4ee831fSMark Brown if (pdata == NULL || pdata->dcdc[id] == NULL) 736e4ee831fSMark Brown return -ENODEV; 737e4ee831fSMark Brown 738fded2f4fSMark Brown dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), 739fded2f4fSMark Brown GFP_KERNEL); 740e4ee831fSMark Brown if (dcdc == NULL) { 741e4ee831fSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 742e4ee831fSMark Brown return -ENOMEM; 743e4ee831fSMark Brown } 744e4ee831fSMark Brown 745e4ee831fSMark Brown dcdc->wm831x = wm831x; 746e4ee831fSMark Brown 747e4ee831fSMark Brown res = platform_get_resource(pdev, IORESOURCE_IO, 0); 748e4ee831fSMark Brown if (res == NULL) { 749e4ee831fSMark Brown dev_err(&pdev->dev, "No I/O resource\n"); 750e4ee831fSMark Brown ret = -EINVAL; 751e4ee831fSMark Brown goto err; 752e4ee831fSMark Brown } 753e4ee831fSMark Brown dcdc->base = res->start; 754e4ee831fSMark Brown 755e4ee831fSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 756e4ee831fSMark Brown dcdc->desc.name = dcdc->name; 75782caa978SMark Brown 75882caa978SMark Brown snprintf(dcdc->supply_name, sizeof(dcdc->supply_name), 75982caa978SMark Brown "DC%dVDD", id + 1); 76082caa978SMark Brown dcdc->desc.supply_name = dcdc->supply_name; 76182caa978SMark Brown 762e4ee831fSMark Brown dcdc->desc.id = id; 763e4ee831fSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 764e4ee831fSMark Brown dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1; 765e4ee831fSMark Brown dcdc->desc.ops = &wm831x_buckp_ops; 766e4ee831fSMark Brown dcdc->desc.owner = THIS_MODULE; 767e4ee831fSMark Brown 768c172708dSMark Brown config.dev = pdev->dev.parent; 769c172708dSMark Brown config.init_data = pdata->dcdc[id]; 770c172708dSMark Brown config.driver_data = dcdc; 771c172708dSMark Brown 772c172708dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &config); 773e4ee831fSMark Brown if (IS_ERR(dcdc->regulator)) { 774e4ee831fSMark Brown ret = PTR_ERR(dcdc->regulator); 775e4ee831fSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 776e4ee831fSMark Brown id + 1, ret); 777e4ee831fSMark Brown goto err; 778e4ee831fSMark Brown } 779e4ee831fSMark Brown 780e4ee831fSMark Brown irq = platform_get_irq_byname(pdev, "UV"); 781dfda9c27SMark Brown ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, 782dfda9c27SMark Brown IRQF_TRIGGER_RISING, dcdc->name, dcdc); 783e4ee831fSMark Brown if (ret != 0) { 784e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 785e4ee831fSMark Brown irq, ret); 786e4ee831fSMark Brown goto err_regulator; 787e4ee831fSMark Brown } 788e4ee831fSMark Brown 789e4ee831fSMark Brown platform_set_drvdata(pdev, dcdc); 790e4ee831fSMark Brown 791e4ee831fSMark Brown return 0; 792e4ee831fSMark Brown 793e4ee831fSMark Brown err_regulator: 794e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 795e4ee831fSMark Brown err: 796e4ee831fSMark Brown return ret; 797e4ee831fSMark Brown } 798e4ee831fSMark Brown 799e4ee831fSMark Brown static __devexit int wm831x_buckp_remove(struct platform_device *pdev) 800e4ee831fSMark Brown { 801e4ee831fSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 802e4ee831fSMark Brown 803eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 804eb66d565SDmitry Torokhov 80569952369SMark Brown free_irq(platform_get_irq_byname(pdev, "UV"), dcdc); 806e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 807e4ee831fSMark Brown 808e4ee831fSMark Brown return 0; 809e4ee831fSMark Brown } 810e4ee831fSMark Brown 811e4ee831fSMark Brown static struct platform_driver wm831x_buckp_driver = { 812e4ee831fSMark Brown .probe = wm831x_buckp_probe, 813e4ee831fSMark Brown .remove = __devexit_p(wm831x_buckp_remove), 814e4ee831fSMark Brown .driver = { 815e4ee831fSMark Brown .name = "wm831x-buckp", 816eb66d565SDmitry Torokhov .owner = THIS_MODULE, 817e4ee831fSMark Brown }, 818e4ee831fSMark Brown }; 819e4ee831fSMark Brown 8208267a9baSMark Brown /* 8211304850dSMark Brown * DCDC boost convertors 8221304850dSMark Brown */ 8231304850dSMark Brown 8241304850dSMark Brown static int wm831x_boostp_get_status(struct regulator_dev *rdev) 8251304850dSMark Brown { 8261304850dSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 8271304850dSMark Brown struct wm831x *wm831x = dcdc->wm831x; 8281304850dSMark Brown int ret; 8291304850dSMark Brown 8301304850dSMark Brown /* First, check for errors */ 8311304850dSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); 8321304850dSMark Brown if (ret < 0) 8331304850dSMark Brown return ret; 8341304850dSMark Brown 8351304850dSMark Brown if (ret & (1 << rdev_get_id(rdev))) { 8361304850dSMark Brown dev_dbg(wm831x->dev, "DCDC%d under voltage\n", 8371304850dSMark Brown rdev_get_id(rdev) + 1); 8381304850dSMark Brown return REGULATOR_STATUS_ERROR; 8391304850dSMark Brown } 8401304850dSMark Brown 8411304850dSMark Brown /* Is the regulator on? */ 8421304850dSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); 8431304850dSMark Brown if (ret < 0) 8441304850dSMark Brown return ret; 8451304850dSMark Brown if (ret & (1 << rdev_get_id(rdev))) 8461304850dSMark Brown return REGULATOR_STATUS_ON; 8471304850dSMark Brown else 8481304850dSMark Brown return REGULATOR_STATUS_OFF; 8491304850dSMark Brown } 8501304850dSMark Brown 8511304850dSMark Brown static struct regulator_ops wm831x_boostp_ops = { 8521304850dSMark Brown .get_status = wm831x_boostp_get_status, 8531304850dSMark Brown 8541304850dSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 8551304850dSMark Brown .enable = wm831x_dcdc_enable, 8561304850dSMark Brown .disable = wm831x_dcdc_disable, 8571304850dSMark Brown }; 8581304850dSMark Brown 8591304850dSMark Brown static __devinit int wm831x_boostp_probe(struct platform_device *pdev) 8601304850dSMark Brown { 8611304850dSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 8621304850dSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 863c172708dSMark Brown struct regulator_config config = { }; 8641304850dSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->dcdc); 8651304850dSMark Brown struct wm831x_dcdc *dcdc; 8661304850dSMark Brown struct resource *res; 8671304850dSMark Brown int ret, irq; 8681304850dSMark Brown 8691304850dSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 8701304850dSMark Brown 8711304850dSMark Brown if (pdata == NULL || pdata->dcdc[id] == NULL) 8721304850dSMark Brown return -ENODEV; 8731304850dSMark Brown 8744c60165dSAxel Lin dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL); 8751304850dSMark Brown if (dcdc == NULL) { 8761304850dSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 8771304850dSMark Brown return -ENOMEM; 8781304850dSMark Brown } 8791304850dSMark Brown 8801304850dSMark Brown dcdc->wm831x = wm831x; 8811304850dSMark Brown 8821304850dSMark Brown res = platform_get_resource(pdev, IORESOURCE_IO, 0); 8831304850dSMark Brown if (res == NULL) { 8841304850dSMark Brown dev_err(&pdev->dev, "No I/O resource\n"); 8851304850dSMark Brown ret = -EINVAL; 8861304850dSMark Brown goto err; 8871304850dSMark Brown } 8881304850dSMark Brown dcdc->base = res->start; 8891304850dSMark Brown 8901304850dSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 8911304850dSMark Brown dcdc->desc.name = dcdc->name; 8921304850dSMark Brown dcdc->desc.id = id; 8931304850dSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 8941304850dSMark Brown dcdc->desc.ops = &wm831x_boostp_ops; 8951304850dSMark Brown dcdc->desc.owner = THIS_MODULE; 8961304850dSMark Brown 897c172708dSMark Brown config.dev = pdev->dev.parent; 898c172708dSMark Brown config.init_data = pdata->dcdc[id]; 899c172708dSMark Brown config.driver_data = dcdc; 900c172708dSMark Brown 901c172708dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &config); 9021304850dSMark Brown if (IS_ERR(dcdc->regulator)) { 9031304850dSMark Brown ret = PTR_ERR(dcdc->regulator); 9041304850dSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 9051304850dSMark Brown id + 1, ret); 9061304850dSMark Brown goto err; 9071304850dSMark Brown } 9081304850dSMark Brown 9091304850dSMark Brown irq = platform_get_irq_byname(pdev, "UV"); 910dfda9c27SMark Brown ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, 9111304850dSMark Brown IRQF_TRIGGER_RISING, dcdc->name, 9121304850dSMark Brown dcdc); 9131304850dSMark Brown if (ret != 0) { 9141304850dSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 9151304850dSMark Brown irq, ret); 9161304850dSMark Brown goto err_regulator; 9171304850dSMark Brown } 9181304850dSMark Brown 9191304850dSMark Brown platform_set_drvdata(pdev, dcdc); 9201304850dSMark Brown 9211304850dSMark Brown return 0; 9221304850dSMark Brown 9231304850dSMark Brown err_regulator: 9241304850dSMark Brown regulator_unregister(dcdc->regulator); 9251304850dSMark Brown err: 9261304850dSMark Brown return ret; 9271304850dSMark Brown } 9281304850dSMark Brown 9291304850dSMark Brown static __devexit int wm831x_boostp_remove(struct platform_device *pdev) 9301304850dSMark Brown { 9311304850dSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 9321304850dSMark Brown 933eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 934eb66d565SDmitry Torokhov 935dfda9c27SMark Brown free_irq(platform_get_irq_byname(pdev, "UV"), dcdc); 9361304850dSMark Brown regulator_unregister(dcdc->regulator); 9371304850dSMark Brown 9381304850dSMark Brown return 0; 9391304850dSMark Brown } 9401304850dSMark Brown 9411304850dSMark Brown static struct platform_driver wm831x_boostp_driver = { 9421304850dSMark Brown .probe = wm831x_boostp_probe, 9431304850dSMark Brown .remove = __devexit_p(wm831x_boostp_remove), 9441304850dSMark Brown .driver = { 9451304850dSMark Brown .name = "wm831x-boostp", 946eb66d565SDmitry Torokhov .owner = THIS_MODULE, 9471304850dSMark Brown }, 9481304850dSMark Brown }; 9491304850dSMark Brown 9501304850dSMark Brown /* 9518267a9baSMark Brown * External Power Enable 9528267a9baSMark Brown * 9538267a9baSMark Brown * These aren't actually DCDCs but look like them in hardware so share 9548267a9baSMark Brown * code. 9558267a9baSMark Brown */ 9568267a9baSMark Brown 9578267a9baSMark Brown #define WM831X_EPE_BASE 6 9588267a9baSMark Brown 9598267a9baSMark Brown static struct regulator_ops wm831x_epe_ops = { 9608267a9baSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 9618267a9baSMark Brown .enable = wm831x_dcdc_enable, 9628267a9baSMark Brown .disable = wm831x_dcdc_disable, 9638267a9baSMark Brown .get_status = wm831x_dcdc_get_status, 9648267a9baSMark Brown }; 9658267a9baSMark Brown 9668267a9baSMark Brown static __devinit int wm831x_epe_probe(struct platform_device *pdev) 9678267a9baSMark Brown { 9688267a9baSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 9698267a9baSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 970c172708dSMark Brown struct regulator_config config = { }; 9718267a9baSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->epe); 9728267a9baSMark Brown struct wm831x_dcdc *dcdc; 9738267a9baSMark Brown int ret; 9748267a9baSMark Brown 9758267a9baSMark Brown dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1); 9768267a9baSMark Brown 9778267a9baSMark Brown if (pdata == NULL || pdata->epe[id] == NULL) 9788267a9baSMark Brown return -ENODEV; 9798267a9baSMark Brown 9804c60165dSAxel Lin dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL); 9818267a9baSMark Brown if (dcdc == NULL) { 9828267a9baSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 9838267a9baSMark Brown return -ENOMEM; 9848267a9baSMark Brown } 9858267a9baSMark Brown 9868267a9baSMark Brown dcdc->wm831x = wm831x; 9878267a9baSMark Brown 9888267a9baSMark Brown /* For current parts this is correct; probably need to revisit 9898267a9baSMark Brown * in future. 9908267a9baSMark Brown */ 9918267a9baSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1); 9928267a9baSMark Brown dcdc->desc.name = dcdc->name; 9938267a9baSMark Brown dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */ 9948267a9baSMark Brown dcdc->desc.ops = &wm831x_epe_ops; 9958267a9baSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 9968267a9baSMark Brown dcdc->desc.owner = THIS_MODULE; 9978267a9baSMark Brown 998c172708dSMark Brown config.dev = pdev->dev.parent; 999c172708dSMark Brown config.init_data = pdata->epe[id]; 1000c172708dSMark Brown config.driver_data = dcdc; 1001c172708dSMark Brown 1002c172708dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &config); 10038267a9baSMark Brown if (IS_ERR(dcdc->regulator)) { 10048267a9baSMark Brown ret = PTR_ERR(dcdc->regulator); 10058267a9baSMark Brown dev_err(wm831x->dev, "Failed to register EPE%d: %d\n", 10068267a9baSMark Brown id + 1, ret); 10078267a9baSMark Brown goto err; 10088267a9baSMark Brown } 10098267a9baSMark Brown 10108267a9baSMark Brown platform_set_drvdata(pdev, dcdc); 10118267a9baSMark Brown 10128267a9baSMark Brown return 0; 10138267a9baSMark Brown 10148267a9baSMark Brown err: 10158267a9baSMark Brown return ret; 10168267a9baSMark Brown } 10178267a9baSMark Brown 10188267a9baSMark Brown static __devexit int wm831x_epe_remove(struct platform_device *pdev) 10198267a9baSMark Brown { 10208267a9baSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 10218267a9baSMark Brown 1022eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 10238267a9baSMark Brown regulator_unregister(dcdc->regulator); 10248267a9baSMark Brown 10258267a9baSMark Brown return 0; 10268267a9baSMark Brown } 10278267a9baSMark Brown 10288267a9baSMark Brown static struct platform_driver wm831x_epe_driver = { 10298267a9baSMark Brown .probe = wm831x_epe_probe, 10308267a9baSMark Brown .remove = __devexit_p(wm831x_epe_remove), 10318267a9baSMark Brown .driver = { 10328267a9baSMark Brown .name = "wm831x-epe", 1033eb66d565SDmitry Torokhov .owner = THIS_MODULE, 10348267a9baSMark Brown }, 10358267a9baSMark Brown }; 10368267a9baSMark Brown 1037e4ee831fSMark Brown static int __init wm831x_dcdc_init(void) 1038e4ee831fSMark Brown { 1039e4ee831fSMark Brown int ret; 1040e4ee831fSMark Brown ret = platform_driver_register(&wm831x_buckv_driver); 1041e4ee831fSMark Brown if (ret != 0) 1042e4ee831fSMark Brown pr_err("Failed to register WM831x BUCKV driver: %d\n", ret); 1043e4ee831fSMark Brown 1044e4ee831fSMark Brown ret = platform_driver_register(&wm831x_buckp_driver); 1045e4ee831fSMark Brown if (ret != 0) 1046e4ee831fSMark Brown pr_err("Failed to register WM831x BUCKP driver: %d\n", ret); 1047e4ee831fSMark Brown 10481304850dSMark Brown ret = platform_driver_register(&wm831x_boostp_driver); 10491304850dSMark Brown if (ret != 0) 10501304850dSMark Brown pr_err("Failed to register WM831x BOOST driver: %d\n", ret); 10511304850dSMark Brown 10528267a9baSMark Brown ret = platform_driver_register(&wm831x_epe_driver); 10538267a9baSMark Brown if (ret != 0) 10548267a9baSMark Brown pr_err("Failed to register WM831x EPE driver: %d\n", ret); 10558267a9baSMark Brown 1056e4ee831fSMark Brown return 0; 1057e4ee831fSMark Brown } 1058e4ee831fSMark Brown subsys_initcall(wm831x_dcdc_init); 1059e4ee831fSMark Brown 1060e4ee831fSMark Brown static void __exit wm831x_dcdc_exit(void) 1061e4ee831fSMark Brown { 10628267a9baSMark Brown platform_driver_unregister(&wm831x_epe_driver); 10631304850dSMark Brown platform_driver_unregister(&wm831x_boostp_driver); 1064e4ee831fSMark Brown platform_driver_unregister(&wm831x_buckp_driver); 1065e4ee831fSMark Brown platform_driver_unregister(&wm831x_buckv_driver); 1066e4ee831fSMark Brown } 1067e4ee831fSMark Brown module_exit(wm831x_dcdc_exit); 1068e4ee831fSMark Brown 1069e4ee831fSMark Brown /* Module information */ 1070e4ee831fSMark Brown MODULE_AUTHOR("Mark Brown"); 1071e4ee831fSMark Brown MODULE_DESCRIPTION("WM831x DC-DC convertor driver"); 1072e4ee831fSMark Brown MODULE_LICENSE("GPL"); 1073e4ee831fSMark Brown MODULE_ALIAS("platform:wm831x-buckv"); 1074e4ee831fSMark Brown MODULE_ALIAS("platform:wm831x-buckp"); 107524b43150SMark Brown MODULE_ALIAS("platform:wm831x-epe"); 1076