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(); 123e4ee831fSMark Brown } 124e4ee831fSMark Brown } 125e4ee831fSMark Brown 126e4ee831fSMark Brown static int wm831x_dcdc_set_mode_int(struct wm831x *wm831x, int reg, 127e4ee831fSMark Brown unsigned int mode) 128e4ee831fSMark Brown { 129e4ee831fSMark Brown int val; 130e4ee831fSMark Brown 131e4ee831fSMark Brown switch (mode) { 132e4ee831fSMark Brown case REGULATOR_MODE_FAST: 133e4ee831fSMark Brown val = WM831X_DCDC_MODE_FAST; 134e4ee831fSMark Brown break; 135e4ee831fSMark Brown case REGULATOR_MODE_NORMAL: 136e4ee831fSMark Brown val = WM831X_DCDC_MODE_NORMAL; 137e4ee831fSMark Brown break; 138e4ee831fSMark Brown case REGULATOR_MODE_STANDBY: 139e4ee831fSMark Brown val = WM831X_DCDC_MODE_STANDBY; 140e4ee831fSMark Brown break; 141e4ee831fSMark Brown case REGULATOR_MODE_IDLE: 142e4ee831fSMark Brown val = WM831X_DCDC_MODE_IDLE; 143e4ee831fSMark Brown break; 144e4ee831fSMark Brown default: 145e4ee831fSMark Brown return -EINVAL; 146e4ee831fSMark Brown } 147e4ee831fSMark Brown 148e4ee831fSMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC1_ON_MODE_MASK, 149e4ee831fSMark Brown val << WM831X_DC1_ON_MODE_SHIFT); 150e4ee831fSMark Brown } 151e4ee831fSMark Brown 152e4ee831fSMark Brown static int wm831x_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode) 153e4ee831fSMark Brown { 154e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 155e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 156e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 157e4ee831fSMark Brown 158e4ee831fSMark Brown return wm831x_dcdc_set_mode_int(wm831x, reg, mode); 159e4ee831fSMark Brown } 160e4ee831fSMark Brown 161e4ee831fSMark Brown static int wm831x_dcdc_set_suspend_mode(struct regulator_dev *rdev, 162e4ee831fSMark Brown unsigned int mode) 163e4ee831fSMark Brown { 164e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 165e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 166e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 167e4ee831fSMark Brown 168e4ee831fSMark Brown return wm831x_dcdc_set_mode_int(wm831x, reg, mode); 169e4ee831fSMark Brown } 170e4ee831fSMark Brown 171e4ee831fSMark Brown static int wm831x_dcdc_get_status(struct regulator_dev *rdev) 172e4ee831fSMark Brown { 173e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 174e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 175e4ee831fSMark Brown int ret; 176e4ee831fSMark Brown 177e4ee831fSMark Brown /* First, check for errors */ 178e4ee831fSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); 179e4ee831fSMark Brown if (ret < 0) 180e4ee831fSMark Brown return ret; 181e4ee831fSMark Brown 182e4ee831fSMark Brown if (ret & (1 << rdev_get_id(rdev))) { 183e4ee831fSMark Brown dev_dbg(wm831x->dev, "DCDC%d under voltage\n", 184e4ee831fSMark Brown rdev_get_id(rdev) + 1); 185e4ee831fSMark Brown return REGULATOR_STATUS_ERROR; 186e4ee831fSMark Brown } 187e4ee831fSMark Brown 188e4ee831fSMark Brown /* DCDC1 and DCDC2 can additionally detect high voltage/current */ 189e4ee831fSMark Brown if (rdev_get_id(rdev) < 2) { 190e4ee831fSMark Brown if (ret & (WM831X_DC1_OV_STS << rdev_get_id(rdev))) { 191e4ee831fSMark Brown dev_dbg(wm831x->dev, "DCDC%d over voltage\n", 192e4ee831fSMark Brown rdev_get_id(rdev) + 1); 193e4ee831fSMark Brown return REGULATOR_STATUS_ERROR; 194e4ee831fSMark Brown } 195e4ee831fSMark Brown 196e4ee831fSMark Brown if (ret & (WM831X_DC1_HC_STS << rdev_get_id(rdev))) { 197e4ee831fSMark Brown dev_dbg(wm831x->dev, "DCDC%d over current\n", 198e4ee831fSMark Brown rdev_get_id(rdev) + 1); 199e4ee831fSMark Brown return REGULATOR_STATUS_ERROR; 200e4ee831fSMark Brown } 201e4ee831fSMark Brown } 202e4ee831fSMark Brown 203e4ee831fSMark Brown /* Is the regulator on? */ 204e4ee831fSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); 205e4ee831fSMark Brown if (ret < 0) 206e4ee831fSMark Brown return ret; 207e4ee831fSMark Brown if (!(ret & (1 << rdev_get_id(rdev)))) 208e4ee831fSMark Brown return REGULATOR_STATUS_OFF; 209e4ee831fSMark Brown 210e4ee831fSMark Brown /* TODO: When we handle hardware control modes so we can report the 211e4ee831fSMark Brown * current mode. */ 212e4ee831fSMark Brown return REGULATOR_STATUS_ON; 213e4ee831fSMark Brown } 214e4ee831fSMark Brown 215e4ee831fSMark Brown static irqreturn_t wm831x_dcdc_uv_irq(int irq, void *data) 216e4ee831fSMark Brown { 217e4ee831fSMark Brown struct wm831x_dcdc *dcdc = data; 218e4ee831fSMark Brown 219e4ee831fSMark Brown regulator_notifier_call_chain(dcdc->regulator, 220e4ee831fSMark Brown REGULATOR_EVENT_UNDER_VOLTAGE, 221e4ee831fSMark Brown NULL); 222e4ee831fSMark Brown 223e4ee831fSMark Brown return IRQ_HANDLED; 224e4ee831fSMark Brown } 225e4ee831fSMark Brown 226e4ee831fSMark Brown static irqreturn_t wm831x_dcdc_oc_irq(int irq, void *data) 227e4ee831fSMark Brown { 228e4ee831fSMark Brown struct wm831x_dcdc *dcdc = data; 229e4ee831fSMark Brown 230e4ee831fSMark Brown regulator_notifier_call_chain(dcdc->regulator, 231e4ee831fSMark Brown REGULATOR_EVENT_OVER_CURRENT, 232e4ee831fSMark Brown NULL); 233e4ee831fSMark Brown 234e4ee831fSMark Brown return IRQ_HANDLED; 235e4ee831fSMark Brown } 236e4ee831fSMark Brown 237e4ee831fSMark Brown /* 238e4ee831fSMark Brown * BUCKV specifics 239e4ee831fSMark Brown */ 240e4ee831fSMark Brown 241e4ee831fSMark Brown static int wm831x_buckv_list_voltage(struct regulator_dev *rdev, 242e4ee831fSMark Brown unsigned selector) 243e4ee831fSMark Brown { 244e4ee831fSMark Brown if (selector <= 0x8) 245e4ee831fSMark Brown return 600000; 246e4ee831fSMark Brown if (selector <= WM831X_BUCKV_MAX_SELECTOR) 247e4ee831fSMark Brown return 600000 + ((selector - 0x8) * 12500); 248e4ee831fSMark Brown return -EINVAL; 249e4ee831fSMark Brown } 250e4ee831fSMark Brown 251e24a04c4SMark Brown static int wm831x_buckv_select_min_voltage(struct regulator_dev *rdev, 252e4ee831fSMark Brown int min_uV, int max_uV) 253e4ee831fSMark Brown { 254e4ee831fSMark Brown u16 vsel; 255e4ee831fSMark Brown 256e4ee831fSMark Brown if (min_uV < 600000) 257e4ee831fSMark Brown vsel = 0; 258e4ee831fSMark Brown else if (min_uV <= 1800000) 259e4ee831fSMark Brown vsel = ((min_uV - 600000) / 12500) + 8; 260e4ee831fSMark Brown else 261e4ee831fSMark Brown return -EINVAL; 262e4ee831fSMark Brown 263e4ee831fSMark Brown if (wm831x_buckv_list_voltage(rdev, vsel) > max_uV) 264e4ee831fSMark Brown return -EINVAL; 265e4ee831fSMark Brown 266e24a04c4SMark Brown return vsel; 267e24a04c4SMark Brown } 268e24a04c4SMark Brown 269e24a04c4SMark Brown static int wm831x_buckv_select_max_voltage(struct regulator_dev *rdev, 270e24a04c4SMark Brown int min_uV, int max_uV) 271e24a04c4SMark Brown { 272e24a04c4SMark Brown u16 vsel; 273e24a04c4SMark Brown 274e24a04c4SMark Brown if (max_uV < 600000 || max_uV > 1800000) 275e24a04c4SMark Brown return -EINVAL; 276e24a04c4SMark Brown 277e24a04c4SMark Brown vsel = ((max_uV - 600000) / 12500) + 8; 278e24a04c4SMark Brown 279e24a04c4SMark Brown if (wm831x_buckv_list_voltage(rdev, vsel) < min_uV || 280e24a04c4SMark Brown wm831x_buckv_list_voltage(rdev, vsel) < max_uV) 281e24a04c4SMark Brown return -EINVAL; 282e24a04c4SMark Brown 283e24a04c4SMark Brown return vsel; 284e24a04c4SMark Brown } 285e24a04c4SMark Brown 286e24a04c4SMark Brown static int wm831x_buckv_set_dvs(struct regulator_dev *rdev, int state) 287e24a04c4SMark Brown { 288e24a04c4SMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 289e24a04c4SMark Brown 290e24a04c4SMark Brown if (state == dcdc->dvs_gpio_state) 291e24a04c4SMark Brown return 0; 292e24a04c4SMark Brown 293e24a04c4SMark Brown dcdc->dvs_gpio_state = state; 294e24a04c4SMark Brown gpio_set_value(dcdc->dvs_gpio, state); 295e24a04c4SMark Brown 296e24a04c4SMark Brown /* Should wait for DVS state change to be asserted if we have 297e24a04c4SMark Brown * a GPIO for it, for now assume the device is configured 298e24a04c4SMark Brown * for the fastest possible transition. 299e24a04c4SMark Brown */ 300e24a04c4SMark Brown 301e24a04c4SMark Brown return 0; 302e4ee831fSMark Brown } 303e4ee831fSMark Brown 304e4ee831fSMark Brown static int wm831x_buckv_set_voltage(struct regulator_dev *rdev, 3053a93f2a9SMark Brown int min_uV, int max_uV, unsigned *selector) 306e4ee831fSMark Brown { 307e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 308e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 309e24a04c4SMark Brown int on_reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 310e24a04c4SMark Brown int dvs_reg = dcdc->base + WM831X_DCDC_DVS_CONTROL; 311e24a04c4SMark Brown int vsel, ret; 312e4ee831fSMark Brown 313e24a04c4SMark Brown vsel = wm831x_buckv_select_min_voltage(rdev, min_uV, max_uV); 314e24a04c4SMark Brown if (vsel < 0) 315e24a04c4SMark Brown return vsel; 316e24a04c4SMark Brown 3173a93f2a9SMark Brown *selector = vsel; 3183a93f2a9SMark Brown 319e24a04c4SMark Brown /* If this value is already set then do a GPIO update if we can */ 320e24a04c4SMark Brown if (dcdc->dvs_gpio && dcdc->on_vsel == vsel) 321e24a04c4SMark Brown return wm831x_buckv_set_dvs(rdev, 0); 322e24a04c4SMark Brown 323e24a04c4SMark Brown if (dcdc->dvs_gpio && dcdc->dvs_vsel == vsel) 324e24a04c4SMark Brown return wm831x_buckv_set_dvs(rdev, 1); 325e24a04c4SMark Brown 326e24a04c4SMark Brown /* Always set the ON status to the minimum voltage */ 327e24a04c4SMark Brown ret = wm831x_set_bits(wm831x, on_reg, WM831X_DC1_ON_VSEL_MASK, vsel); 328e24a04c4SMark Brown if (ret < 0) 329e24a04c4SMark Brown return ret; 330e24a04c4SMark Brown dcdc->on_vsel = vsel; 331e24a04c4SMark Brown 332e24a04c4SMark Brown if (!dcdc->dvs_gpio) 333e24a04c4SMark Brown return ret; 334e24a04c4SMark Brown 335e24a04c4SMark Brown /* Kick the voltage transition now */ 336e24a04c4SMark Brown ret = wm831x_buckv_set_dvs(rdev, 0); 337e24a04c4SMark Brown if (ret < 0) 338e24a04c4SMark Brown return ret; 339e24a04c4SMark Brown 340e24a04c4SMark Brown /* Set the high voltage as the DVS voltage. This is optimised 341e24a04c4SMark Brown * for CPUfreq usage, most processors will keep the maximum 342e24a04c4SMark Brown * voltage constant and lower the minimum with the frequency. */ 343e24a04c4SMark Brown vsel = wm831x_buckv_select_max_voltage(rdev, min_uV, max_uV); 344e24a04c4SMark Brown if (vsel < 0) { 345e24a04c4SMark Brown /* This should never happen - at worst the same vsel 346e24a04c4SMark Brown * should be chosen */ 347e24a04c4SMark Brown WARN_ON(vsel < 0); 348e24a04c4SMark Brown return 0; 349e24a04c4SMark Brown } 350e24a04c4SMark Brown 351e24a04c4SMark Brown /* Don't bother if it's the same VSEL we're already using */ 352e24a04c4SMark Brown if (vsel == dcdc->on_vsel) 353e24a04c4SMark Brown return 0; 354e24a04c4SMark Brown 355e24a04c4SMark Brown ret = wm831x_set_bits(wm831x, dvs_reg, WM831X_DC1_DVS_VSEL_MASK, vsel); 356e24a04c4SMark Brown if (ret == 0) 357e24a04c4SMark Brown dcdc->dvs_vsel = vsel; 358e24a04c4SMark Brown else 359e24a04c4SMark Brown dev_warn(wm831x->dev, "Failed to set DCDC DVS VSEL: %d\n", 360e24a04c4SMark Brown ret); 361e24a04c4SMark Brown 362e24a04c4SMark Brown return 0; 363e4ee831fSMark Brown } 364e4ee831fSMark Brown 365e4ee831fSMark Brown static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev, 366e4ee831fSMark Brown int uV) 367e4ee831fSMark Brown { 368e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 369e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 370e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 371e24a04c4SMark Brown int vsel; 372e4ee831fSMark Brown 373e24a04c4SMark Brown vsel = wm831x_buckv_select_min_voltage(rdev, uV, uV); 374e24a04c4SMark Brown if (vsel < 0) 375e24a04c4SMark Brown return vsel; 376e24a04c4SMark Brown 377e24a04c4SMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC1_SLP_VSEL_MASK, vsel); 378e4ee831fSMark Brown } 379e4ee831fSMark Brown 380afb8bb80SMark Brown static int wm831x_buckv_get_voltage_sel(struct regulator_dev *rdev) 381e4ee831fSMark Brown { 382e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 383e4ee831fSMark Brown 384e24a04c4SMark Brown if (dcdc->dvs_gpio && dcdc->dvs_gpio_state) 385afb8bb80SMark Brown return dcdc->dvs_vsel; 386e24a04c4SMark Brown else 387afb8bb80SMark Brown return dcdc->on_vsel; 388e4ee831fSMark Brown } 389e4ee831fSMark Brown 390e4ee831fSMark Brown /* Current limit options */ 391e4ee831fSMark Brown static u16 wm831x_dcdc_ilim[] = { 392e4ee831fSMark Brown 125, 250, 375, 500, 625, 750, 875, 1000 393e4ee831fSMark Brown }; 394e4ee831fSMark Brown 395e4ee831fSMark Brown static int wm831x_buckv_set_current_limit(struct regulator_dev *rdev, 396e4ee831fSMark Brown int min_uA, int max_uA) 397e4ee831fSMark Brown { 398e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 399e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 400e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; 401e4ee831fSMark Brown int i; 402e4ee831fSMark Brown 403e4ee831fSMark Brown for (i = 0; i < ARRAY_SIZE(wm831x_dcdc_ilim); i++) { 404e4ee831fSMark Brown if (max_uA <= wm831x_dcdc_ilim[i]) 405e4ee831fSMark Brown break; 406e4ee831fSMark Brown } 407e4ee831fSMark Brown if (i == ARRAY_SIZE(wm831x_dcdc_ilim)) 408e4ee831fSMark Brown return -EINVAL; 409e4ee831fSMark Brown 410e4ee831fSMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC1_HC_THR_MASK, i); 411e4ee831fSMark Brown } 412e4ee831fSMark Brown 413e4ee831fSMark Brown static int wm831x_buckv_get_current_limit(struct regulator_dev *rdev) 414e4ee831fSMark Brown { 415e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 416e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 417e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; 418e4ee831fSMark Brown int val; 419e4ee831fSMark Brown 420e4ee831fSMark Brown val = wm831x_reg_read(wm831x, reg); 421e4ee831fSMark Brown if (val < 0) 422e4ee831fSMark Brown return val; 423e4ee831fSMark Brown 424e4ee831fSMark Brown return wm831x_dcdc_ilim[val & WM831X_DC1_HC_THR_MASK]; 425e4ee831fSMark Brown } 426e4ee831fSMark Brown 427e4ee831fSMark Brown static struct regulator_ops wm831x_buckv_ops = { 428e4ee831fSMark Brown .set_voltage = wm831x_buckv_set_voltage, 429afb8bb80SMark Brown .get_voltage_sel = wm831x_buckv_get_voltage_sel, 430e4ee831fSMark Brown .list_voltage = wm831x_buckv_list_voltage, 431e4ee831fSMark Brown .set_suspend_voltage = wm831x_buckv_set_suspend_voltage, 432e4ee831fSMark Brown .set_current_limit = wm831x_buckv_set_current_limit, 433e4ee831fSMark Brown .get_current_limit = wm831x_buckv_get_current_limit, 434e4ee831fSMark Brown 435e4ee831fSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 436e4ee831fSMark Brown .enable = wm831x_dcdc_enable, 437e4ee831fSMark Brown .disable = wm831x_dcdc_disable, 438e4ee831fSMark Brown .get_status = wm831x_dcdc_get_status, 439e4ee831fSMark Brown .get_mode = wm831x_dcdc_get_mode, 440e4ee831fSMark Brown .set_mode = wm831x_dcdc_set_mode, 441e4ee831fSMark Brown .set_suspend_mode = wm831x_dcdc_set_suspend_mode, 442e4ee831fSMark Brown }; 443e4ee831fSMark Brown 444e24a04c4SMark Brown /* 445e24a04c4SMark Brown * Set up DVS control. We just log errors since we can still run 446e24a04c4SMark Brown * (with reduced performance) if we fail. 447e24a04c4SMark Brown */ 448e24a04c4SMark Brown static __devinit void wm831x_buckv_dvs_init(struct wm831x_dcdc *dcdc, 449e24a04c4SMark Brown struct wm831x_buckv_pdata *pdata) 450e24a04c4SMark Brown { 451e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 452e24a04c4SMark Brown int ret; 453e24a04c4SMark Brown u16 ctrl; 454e24a04c4SMark Brown 455e24a04c4SMark Brown if (!pdata || !pdata->dvs_gpio) 456e24a04c4SMark Brown return; 457e24a04c4SMark Brown 458e24a04c4SMark Brown switch (pdata->dvs_control_src) { 459e24a04c4SMark Brown case 1: 460e24a04c4SMark Brown ctrl = 2 << WM831X_DC1_DVS_SRC_SHIFT; 461e24a04c4SMark Brown break; 462e24a04c4SMark Brown case 2: 463e24a04c4SMark Brown ctrl = 3 << WM831X_DC1_DVS_SRC_SHIFT; 464e24a04c4SMark Brown break; 465e24a04c4SMark Brown default: 466e24a04c4SMark Brown dev_err(wm831x->dev, "Invalid DVS control source %d for %s\n", 467e24a04c4SMark Brown pdata->dvs_control_src, dcdc->name); 468e24a04c4SMark Brown return; 469e24a04c4SMark Brown } 470e24a04c4SMark Brown 471e24a04c4SMark Brown ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL, 472e24a04c4SMark Brown WM831X_DC1_DVS_SRC_MASK, ctrl); 473e24a04c4SMark Brown if (ret < 0) { 474e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to set %s DVS source: %d\n", 475e24a04c4SMark Brown dcdc->name, ret); 476e24a04c4SMark Brown return; 477e24a04c4SMark Brown } 478e24a04c4SMark Brown 479e24a04c4SMark Brown ret = gpio_request(pdata->dvs_gpio, "DCDC DVS"); 480e24a04c4SMark Brown if (ret < 0) { 481e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to get %s DVS GPIO: %d\n", 482e24a04c4SMark Brown dcdc->name, ret); 483e24a04c4SMark Brown return; 484e24a04c4SMark Brown } 485e24a04c4SMark Brown 486e24a04c4SMark Brown /* gpiolib won't let us read the GPIO status so pick the higher 487e24a04c4SMark Brown * of the two existing voltages so we take it as platform data. 488e24a04c4SMark Brown */ 489e24a04c4SMark Brown dcdc->dvs_gpio_state = pdata->dvs_init_state; 490e24a04c4SMark Brown 491e24a04c4SMark Brown ret = gpio_direction_output(pdata->dvs_gpio, dcdc->dvs_gpio_state); 492e24a04c4SMark Brown if (ret < 0) { 493e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to enable %s DVS GPIO: %d\n", 494e24a04c4SMark Brown dcdc->name, ret); 495e24a04c4SMark Brown gpio_free(pdata->dvs_gpio); 496e24a04c4SMark Brown return; 497e24a04c4SMark Brown } 498e24a04c4SMark Brown 499e24a04c4SMark Brown dcdc->dvs_gpio = pdata->dvs_gpio; 500e24a04c4SMark Brown } 501e24a04c4SMark Brown 502e4ee831fSMark Brown static __devinit int wm831x_buckv_probe(struct platform_device *pdev) 503e4ee831fSMark Brown { 504e4ee831fSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 505e4ee831fSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 506e4ee831fSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->dcdc); 507e4ee831fSMark Brown struct wm831x_dcdc *dcdc; 508e4ee831fSMark Brown struct resource *res; 509e4ee831fSMark Brown int ret, irq; 510e4ee831fSMark Brown 511e4ee831fSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 512e4ee831fSMark Brown 513e4ee831fSMark Brown if (pdata == NULL || pdata->dcdc[id] == NULL) 514e4ee831fSMark Brown return -ENODEV; 515e4ee831fSMark Brown 516e4ee831fSMark Brown dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); 517e4ee831fSMark Brown if (dcdc == NULL) { 518e4ee831fSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 519e4ee831fSMark Brown return -ENOMEM; 520e4ee831fSMark Brown } 521e4ee831fSMark Brown 522e4ee831fSMark Brown dcdc->wm831x = wm831x; 523e4ee831fSMark Brown 524e4ee831fSMark Brown res = platform_get_resource(pdev, IORESOURCE_IO, 0); 525e4ee831fSMark Brown if (res == NULL) { 526e4ee831fSMark Brown dev_err(&pdev->dev, "No I/O resource\n"); 527e4ee831fSMark Brown ret = -EINVAL; 528e4ee831fSMark Brown goto err; 529e4ee831fSMark Brown } 530e4ee831fSMark Brown dcdc->base = res->start; 531e4ee831fSMark Brown 532e4ee831fSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 533e4ee831fSMark Brown dcdc->desc.name = dcdc->name; 534e4ee831fSMark Brown dcdc->desc.id = id; 535e4ee831fSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 536e4ee831fSMark Brown dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1; 537e4ee831fSMark Brown dcdc->desc.ops = &wm831x_buckv_ops; 538e4ee831fSMark Brown dcdc->desc.owner = THIS_MODULE; 539e4ee831fSMark Brown 540e24a04c4SMark Brown ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG); 541e24a04c4SMark Brown if (ret < 0) { 542e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to read ON VSEL: %d\n", ret); 543e24a04c4SMark Brown goto err; 544e24a04c4SMark Brown } 545e24a04c4SMark Brown dcdc->on_vsel = ret & WM831X_DC1_ON_VSEL_MASK; 546e24a04c4SMark Brown 547e24a04c4SMark Brown ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG); 548e24a04c4SMark Brown if (ret < 0) { 549e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to read DVS VSEL: %d\n", ret); 550e24a04c4SMark Brown goto err; 551e24a04c4SMark Brown } 552e24a04c4SMark Brown dcdc->dvs_vsel = ret & WM831X_DC1_DVS_VSEL_MASK; 553e24a04c4SMark Brown 554e24a04c4SMark Brown if (pdata->dcdc[id]) 555e24a04c4SMark Brown wm831x_buckv_dvs_init(dcdc, pdata->dcdc[id]->driver_data); 556e24a04c4SMark Brown 557e4ee831fSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, 558e4ee831fSMark Brown pdata->dcdc[id], dcdc); 559e4ee831fSMark Brown if (IS_ERR(dcdc->regulator)) { 560e4ee831fSMark Brown ret = PTR_ERR(dcdc->regulator); 561e4ee831fSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 562e4ee831fSMark Brown id + 1, ret); 563e4ee831fSMark Brown goto err; 564e4ee831fSMark Brown } 565e4ee831fSMark Brown 566e4ee831fSMark Brown irq = platform_get_irq_byname(pdev, "UV"); 567e4ee831fSMark Brown ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_uv_irq, 568e4ee831fSMark Brown IRQF_TRIGGER_RISING, dcdc->name, 569e4ee831fSMark Brown dcdc); 570e4ee831fSMark Brown if (ret != 0) { 571e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 572e4ee831fSMark Brown irq, ret); 573e4ee831fSMark Brown goto err_regulator; 574e4ee831fSMark Brown } 575e4ee831fSMark Brown 576e4ee831fSMark Brown irq = platform_get_irq_byname(pdev, "HC"); 577e4ee831fSMark Brown ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_oc_irq, 578e4ee831fSMark Brown IRQF_TRIGGER_RISING, dcdc->name, 579e4ee831fSMark Brown dcdc); 580e4ee831fSMark Brown if (ret != 0) { 581e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n", 582e4ee831fSMark Brown irq, ret); 583e4ee831fSMark Brown goto err_uv; 584e4ee831fSMark Brown } 585e4ee831fSMark Brown 586e4ee831fSMark Brown platform_set_drvdata(pdev, dcdc); 587e4ee831fSMark Brown 588e4ee831fSMark Brown return 0; 589e4ee831fSMark Brown 590e4ee831fSMark Brown err_uv: 591e4ee831fSMark Brown wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); 592e4ee831fSMark Brown err_regulator: 593e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 594e4ee831fSMark Brown err: 595e24a04c4SMark Brown if (dcdc->dvs_gpio) 596e24a04c4SMark Brown gpio_free(dcdc->dvs_gpio); 597e4ee831fSMark Brown kfree(dcdc); 598e4ee831fSMark Brown return ret; 599e4ee831fSMark Brown } 600e4ee831fSMark Brown 601e4ee831fSMark Brown static __devexit int wm831x_buckv_remove(struct platform_device *pdev) 602e4ee831fSMark Brown { 603e4ee831fSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 604e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 605e4ee831fSMark Brown 606eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 607eb66d565SDmitry Torokhov 608e4ee831fSMark Brown wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "HC"), dcdc); 609e4ee831fSMark Brown wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); 610e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 611e24a04c4SMark Brown if (dcdc->dvs_gpio) 612e24a04c4SMark Brown gpio_free(dcdc->dvs_gpio); 613e4ee831fSMark Brown kfree(dcdc); 614e4ee831fSMark Brown 615e4ee831fSMark Brown return 0; 616e4ee831fSMark Brown } 617e4ee831fSMark Brown 618e4ee831fSMark Brown static struct platform_driver wm831x_buckv_driver = { 619e4ee831fSMark Brown .probe = wm831x_buckv_probe, 620e4ee831fSMark Brown .remove = __devexit_p(wm831x_buckv_remove), 621e4ee831fSMark Brown .driver = { 622e4ee831fSMark Brown .name = "wm831x-buckv", 623eb66d565SDmitry Torokhov .owner = THIS_MODULE, 624e4ee831fSMark Brown }, 625e4ee831fSMark Brown }; 626e4ee831fSMark Brown 627e4ee831fSMark Brown /* 628e4ee831fSMark Brown * BUCKP specifics 629e4ee831fSMark Brown */ 630e4ee831fSMark Brown 631e4ee831fSMark Brown static int wm831x_buckp_list_voltage(struct regulator_dev *rdev, 632e4ee831fSMark Brown unsigned selector) 633e4ee831fSMark Brown { 634e4ee831fSMark Brown if (selector <= WM831X_BUCKP_MAX_SELECTOR) 635e4ee831fSMark Brown return 850000 + (selector * 25000); 636e4ee831fSMark Brown else 637e4ee831fSMark Brown return -EINVAL; 638e4ee831fSMark Brown } 639e4ee831fSMark Brown 640e4ee831fSMark Brown static int wm831x_buckp_set_voltage_int(struct regulator_dev *rdev, int reg, 6413a93f2a9SMark Brown int min_uV, int max_uV, int *selector) 642e4ee831fSMark Brown { 643e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 644e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 645e4ee831fSMark Brown u16 vsel; 646e4ee831fSMark Brown 647e4ee831fSMark Brown if (min_uV <= 34000000) 648e4ee831fSMark Brown vsel = (min_uV - 850000) / 25000; 649e4ee831fSMark Brown else 650e4ee831fSMark Brown return -EINVAL; 651e4ee831fSMark Brown 652e4ee831fSMark Brown if (wm831x_buckp_list_voltage(rdev, vsel) > max_uV) 653e4ee831fSMark Brown return -EINVAL; 654e4ee831fSMark Brown 6553a93f2a9SMark Brown *selector = vsel; 6563a93f2a9SMark Brown 657e4ee831fSMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, vsel); 658e4ee831fSMark Brown } 659e4ee831fSMark Brown 660e4ee831fSMark Brown static int wm831x_buckp_set_voltage(struct regulator_dev *rdev, 6613a93f2a9SMark Brown int min_uV, int max_uV, 6623a93f2a9SMark Brown unsigned *selector) 663e4ee831fSMark Brown { 664e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 665e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 666e4ee831fSMark Brown 6673a93f2a9SMark Brown return wm831x_buckp_set_voltage_int(rdev, reg, min_uV, max_uV, 6683a93f2a9SMark Brown selector); 669e4ee831fSMark Brown } 670e4ee831fSMark Brown 671e4ee831fSMark Brown static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev, 672e4ee831fSMark Brown int uV) 673e4ee831fSMark Brown { 674e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 675e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 6763a93f2a9SMark Brown unsigned selector; 677e4ee831fSMark Brown 6783a93f2a9SMark Brown return wm831x_buckp_set_voltage_int(rdev, reg, uV, uV, &selector); 679e4ee831fSMark Brown } 680e4ee831fSMark Brown 681afb8bb80SMark Brown static int wm831x_buckp_get_voltage_sel(struct regulator_dev *rdev) 682e4ee831fSMark Brown { 683e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 684e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 685e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 686e4ee831fSMark Brown int val; 687e4ee831fSMark Brown 688e4ee831fSMark Brown val = wm831x_reg_read(wm831x, reg); 689e4ee831fSMark Brown if (val < 0) 690e4ee831fSMark Brown return val; 691e4ee831fSMark Brown 692afb8bb80SMark Brown return val & WM831X_DC3_ON_VSEL_MASK; 693e4ee831fSMark Brown } 694e4ee831fSMark Brown 695e4ee831fSMark Brown static struct regulator_ops wm831x_buckp_ops = { 696e4ee831fSMark Brown .set_voltage = wm831x_buckp_set_voltage, 697afb8bb80SMark Brown .get_voltage_sel = wm831x_buckp_get_voltage_sel, 698e4ee831fSMark Brown .list_voltage = wm831x_buckp_list_voltage, 699e4ee831fSMark Brown .set_suspend_voltage = wm831x_buckp_set_suspend_voltage, 700e4ee831fSMark Brown 701e4ee831fSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 702e4ee831fSMark Brown .enable = wm831x_dcdc_enable, 703e4ee831fSMark Brown .disable = wm831x_dcdc_disable, 704e4ee831fSMark Brown .get_status = wm831x_dcdc_get_status, 705e4ee831fSMark Brown .get_mode = wm831x_dcdc_get_mode, 706e4ee831fSMark Brown .set_mode = wm831x_dcdc_set_mode, 707e4ee831fSMark Brown .set_suspend_mode = wm831x_dcdc_set_suspend_mode, 708e4ee831fSMark Brown }; 709e4ee831fSMark Brown 710e4ee831fSMark Brown static __devinit int wm831x_buckp_probe(struct platform_device *pdev) 711e4ee831fSMark Brown { 712e4ee831fSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 713e4ee831fSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 714e4ee831fSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->dcdc); 715e4ee831fSMark Brown struct wm831x_dcdc *dcdc; 716e4ee831fSMark Brown struct resource *res; 717e4ee831fSMark Brown int ret, irq; 718e4ee831fSMark Brown 719e4ee831fSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 720e4ee831fSMark Brown 721e4ee831fSMark Brown if (pdata == NULL || pdata->dcdc[id] == NULL) 722e4ee831fSMark Brown return -ENODEV; 723e4ee831fSMark Brown 724e4ee831fSMark Brown dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); 725e4ee831fSMark Brown if (dcdc == NULL) { 726e4ee831fSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 727e4ee831fSMark Brown return -ENOMEM; 728e4ee831fSMark Brown } 729e4ee831fSMark Brown 730e4ee831fSMark Brown dcdc->wm831x = wm831x; 731e4ee831fSMark Brown 732e4ee831fSMark Brown res = platform_get_resource(pdev, IORESOURCE_IO, 0); 733e4ee831fSMark Brown if (res == NULL) { 734e4ee831fSMark Brown dev_err(&pdev->dev, "No I/O resource\n"); 735e4ee831fSMark Brown ret = -EINVAL; 736e4ee831fSMark Brown goto err; 737e4ee831fSMark Brown } 738e4ee831fSMark Brown dcdc->base = res->start; 739e4ee831fSMark Brown 740e4ee831fSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 741e4ee831fSMark Brown dcdc->desc.name = dcdc->name; 742e4ee831fSMark Brown dcdc->desc.id = id; 743e4ee831fSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 744e4ee831fSMark Brown dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1; 745e4ee831fSMark Brown dcdc->desc.ops = &wm831x_buckp_ops; 746e4ee831fSMark Brown dcdc->desc.owner = THIS_MODULE; 747e4ee831fSMark Brown 748e4ee831fSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, 749e4ee831fSMark Brown pdata->dcdc[id], dcdc); 750e4ee831fSMark Brown if (IS_ERR(dcdc->regulator)) { 751e4ee831fSMark Brown ret = PTR_ERR(dcdc->regulator); 752e4ee831fSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 753e4ee831fSMark Brown id + 1, ret); 754e4ee831fSMark Brown goto err; 755e4ee831fSMark Brown } 756e4ee831fSMark Brown 757e4ee831fSMark Brown irq = platform_get_irq_byname(pdev, "UV"); 758e4ee831fSMark Brown ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_uv_irq, 759e4ee831fSMark Brown IRQF_TRIGGER_RISING, dcdc->name, 760e4ee831fSMark Brown 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 kfree(dcdc); 775e4ee831fSMark Brown return ret; 776e4ee831fSMark Brown } 777e4ee831fSMark Brown 778e4ee831fSMark Brown static __devexit int wm831x_buckp_remove(struct platform_device *pdev) 779e4ee831fSMark Brown { 780e4ee831fSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 781e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 782e4ee831fSMark Brown 783eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 784eb66d565SDmitry Torokhov 785e4ee831fSMark Brown wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); 786e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 787e4ee831fSMark Brown kfree(dcdc); 788e4ee831fSMark Brown 789e4ee831fSMark Brown return 0; 790e4ee831fSMark Brown } 791e4ee831fSMark Brown 792e4ee831fSMark Brown static struct platform_driver wm831x_buckp_driver = { 793e4ee831fSMark Brown .probe = wm831x_buckp_probe, 794e4ee831fSMark Brown .remove = __devexit_p(wm831x_buckp_remove), 795e4ee831fSMark Brown .driver = { 796e4ee831fSMark Brown .name = "wm831x-buckp", 797eb66d565SDmitry Torokhov .owner = THIS_MODULE, 798e4ee831fSMark Brown }, 799e4ee831fSMark Brown }; 800e4ee831fSMark Brown 8018267a9baSMark Brown /* 8021304850dSMark Brown * DCDC boost convertors 8031304850dSMark Brown */ 8041304850dSMark Brown 8051304850dSMark Brown static int wm831x_boostp_get_status(struct regulator_dev *rdev) 8061304850dSMark Brown { 8071304850dSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 8081304850dSMark Brown struct wm831x *wm831x = dcdc->wm831x; 8091304850dSMark Brown int ret; 8101304850dSMark Brown 8111304850dSMark Brown /* First, check for errors */ 8121304850dSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); 8131304850dSMark Brown if (ret < 0) 8141304850dSMark Brown return ret; 8151304850dSMark Brown 8161304850dSMark Brown if (ret & (1 << rdev_get_id(rdev))) { 8171304850dSMark Brown dev_dbg(wm831x->dev, "DCDC%d under voltage\n", 8181304850dSMark Brown rdev_get_id(rdev) + 1); 8191304850dSMark Brown return REGULATOR_STATUS_ERROR; 8201304850dSMark Brown } 8211304850dSMark Brown 8221304850dSMark Brown /* Is the regulator on? */ 8231304850dSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); 8241304850dSMark Brown if (ret < 0) 8251304850dSMark Brown return ret; 8261304850dSMark Brown if (ret & (1 << rdev_get_id(rdev))) 8271304850dSMark Brown return REGULATOR_STATUS_ON; 8281304850dSMark Brown else 8291304850dSMark Brown return REGULATOR_STATUS_OFF; 8301304850dSMark Brown } 8311304850dSMark Brown 8321304850dSMark Brown static struct regulator_ops wm831x_boostp_ops = { 8331304850dSMark Brown .get_status = wm831x_boostp_get_status, 8341304850dSMark Brown 8351304850dSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 8361304850dSMark Brown .enable = wm831x_dcdc_enable, 8371304850dSMark Brown .disable = wm831x_dcdc_disable, 8381304850dSMark Brown }; 8391304850dSMark Brown 8401304850dSMark Brown static __devinit int wm831x_boostp_probe(struct platform_device *pdev) 8411304850dSMark Brown { 8421304850dSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 8431304850dSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 8441304850dSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->dcdc); 8451304850dSMark Brown struct wm831x_dcdc *dcdc; 8461304850dSMark Brown struct resource *res; 8471304850dSMark Brown int ret, irq; 8481304850dSMark Brown 8491304850dSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 8501304850dSMark Brown 8511304850dSMark Brown if (pdata == NULL || pdata->dcdc[id] == NULL) 8521304850dSMark Brown return -ENODEV; 8531304850dSMark Brown 8541304850dSMark Brown dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); 8551304850dSMark Brown if (dcdc == NULL) { 8561304850dSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 8571304850dSMark Brown return -ENOMEM; 8581304850dSMark Brown } 8591304850dSMark Brown 8601304850dSMark Brown dcdc->wm831x = wm831x; 8611304850dSMark Brown 8621304850dSMark Brown res = platform_get_resource(pdev, IORESOURCE_IO, 0); 8631304850dSMark Brown if (res == NULL) { 8641304850dSMark Brown dev_err(&pdev->dev, "No I/O resource\n"); 8651304850dSMark Brown ret = -EINVAL; 8661304850dSMark Brown goto err; 8671304850dSMark Brown } 8681304850dSMark Brown dcdc->base = res->start; 8691304850dSMark Brown 8701304850dSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 8711304850dSMark Brown dcdc->desc.name = dcdc->name; 8721304850dSMark Brown dcdc->desc.id = id; 8731304850dSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 8741304850dSMark Brown dcdc->desc.ops = &wm831x_boostp_ops; 8751304850dSMark Brown dcdc->desc.owner = THIS_MODULE; 8761304850dSMark Brown 8771304850dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, 8781304850dSMark Brown pdata->dcdc[id], dcdc); 8791304850dSMark Brown if (IS_ERR(dcdc->regulator)) { 8801304850dSMark Brown ret = PTR_ERR(dcdc->regulator); 8811304850dSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 8821304850dSMark Brown id + 1, ret); 8831304850dSMark Brown goto err; 8841304850dSMark Brown } 8851304850dSMark Brown 8861304850dSMark Brown irq = platform_get_irq_byname(pdev, "UV"); 8871304850dSMark Brown ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_uv_irq, 8881304850dSMark Brown IRQF_TRIGGER_RISING, dcdc->name, 8891304850dSMark Brown dcdc); 8901304850dSMark Brown if (ret != 0) { 8911304850dSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 8921304850dSMark Brown irq, ret); 8931304850dSMark Brown goto err_regulator; 8941304850dSMark Brown } 8951304850dSMark Brown 8961304850dSMark Brown platform_set_drvdata(pdev, dcdc); 8971304850dSMark Brown 8981304850dSMark Brown return 0; 8991304850dSMark Brown 9001304850dSMark Brown err_regulator: 9011304850dSMark Brown regulator_unregister(dcdc->regulator); 9021304850dSMark Brown err: 9031304850dSMark Brown kfree(dcdc); 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 struct wm831x *wm831x = dcdc->wm831x; 9111304850dSMark Brown 912eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 913eb66d565SDmitry Torokhov 9141304850dSMark Brown wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); 9151304850dSMark Brown regulator_unregister(dcdc->regulator); 9161304850dSMark Brown kfree(dcdc); 9171304850dSMark Brown 9181304850dSMark Brown return 0; 9191304850dSMark Brown } 9201304850dSMark Brown 9211304850dSMark Brown static struct platform_driver wm831x_boostp_driver = { 9221304850dSMark Brown .probe = wm831x_boostp_probe, 9231304850dSMark Brown .remove = __devexit_p(wm831x_boostp_remove), 9241304850dSMark Brown .driver = { 9251304850dSMark Brown .name = "wm831x-boostp", 926eb66d565SDmitry Torokhov .owner = THIS_MODULE, 9271304850dSMark Brown }, 9281304850dSMark Brown }; 9291304850dSMark Brown 9301304850dSMark Brown /* 9318267a9baSMark Brown * External Power Enable 9328267a9baSMark Brown * 9338267a9baSMark Brown * These aren't actually DCDCs but look like them in hardware so share 9348267a9baSMark Brown * code. 9358267a9baSMark Brown */ 9368267a9baSMark Brown 9378267a9baSMark Brown #define WM831X_EPE_BASE 6 9388267a9baSMark Brown 9398267a9baSMark Brown static struct regulator_ops wm831x_epe_ops = { 9408267a9baSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 9418267a9baSMark Brown .enable = wm831x_dcdc_enable, 9428267a9baSMark Brown .disable = wm831x_dcdc_disable, 9438267a9baSMark Brown .get_status = wm831x_dcdc_get_status, 9448267a9baSMark Brown }; 9458267a9baSMark Brown 9468267a9baSMark Brown static __devinit int wm831x_epe_probe(struct platform_device *pdev) 9478267a9baSMark Brown { 9488267a9baSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 9498267a9baSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 9508267a9baSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->epe); 9518267a9baSMark Brown struct wm831x_dcdc *dcdc; 9528267a9baSMark Brown int ret; 9538267a9baSMark Brown 9548267a9baSMark Brown dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1); 9558267a9baSMark Brown 9568267a9baSMark Brown if (pdata == NULL || pdata->epe[id] == NULL) 9578267a9baSMark Brown return -ENODEV; 9588267a9baSMark Brown 9598267a9baSMark Brown dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); 9608267a9baSMark Brown if (dcdc == NULL) { 9618267a9baSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 9628267a9baSMark Brown return -ENOMEM; 9638267a9baSMark Brown } 9648267a9baSMark Brown 9658267a9baSMark Brown dcdc->wm831x = wm831x; 9668267a9baSMark Brown 9678267a9baSMark Brown /* For current parts this is correct; probably need to revisit 9688267a9baSMark Brown * in future. 9698267a9baSMark Brown */ 9708267a9baSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1); 9718267a9baSMark Brown dcdc->desc.name = dcdc->name; 9728267a9baSMark Brown dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */ 9738267a9baSMark Brown dcdc->desc.ops = &wm831x_epe_ops; 9748267a9baSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 9758267a9baSMark Brown dcdc->desc.owner = THIS_MODULE; 9768267a9baSMark Brown 9778267a9baSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, 9788267a9baSMark Brown pdata->epe[id], dcdc); 9798267a9baSMark Brown if (IS_ERR(dcdc->regulator)) { 9808267a9baSMark Brown ret = PTR_ERR(dcdc->regulator); 9818267a9baSMark Brown dev_err(wm831x->dev, "Failed to register EPE%d: %d\n", 9828267a9baSMark Brown id + 1, ret); 9838267a9baSMark Brown goto err; 9848267a9baSMark Brown } 9858267a9baSMark Brown 9868267a9baSMark Brown platform_set_drvdata(pdev, dcdc); 9878267a9baSMark Brown 9888267a9baSMark Brown return 0; 9898267a9baSMark Brown 9908267a9baSMark Brown err: 9918267a9baSMark Brown kfree(dcdc); 9928267a9baSMark Brown return ret; 9938267a9baSMark Brown } 9948267a9baSMark Brown 9958267a9baSMark Brown static __devexit int wm831x_epe_remove(struct platform_device *pdev) 9968267a9baSMark Brown { 9978267a9baSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 9988267a9baSMark Brown 999eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 1000eb66d565SDmitry Torokhov 10018267a9baSMark Brown regulator_unregister(dcdc->regulator); 10028267a9baSMark Brown kfree(dcdc); 10038267a9baSMark Brown 10048267a9baSMark Brown return 0; 10058267a9baSMark Brown } 10068267a9baSMark Brown 10078267a9baSMark Brown static struct platform_driver wm831x_epe_driver = { 10088267a9baSMark Brown .probe = wm831x_epe_probe, 10098267a9baSMark Brown .remove = __devexit_p(wm831x_epe_remove), 10108267a9baSMark Brown .driver = { 10118267a9baSMark Brown .name = "wm831x-epe", 1012eb66d565SDmitry Torokhov .owner = THIS_MODULE, 10138267a9baSMark Brown }, 10148267a9baSMark Brown }; 10158267a9baSMark Brown 1016e4ee831fSMark Brown static int __init wm831x_dcdc_init(void) 1017e4ee831fSMark Brown { 1018e4ee831fSMark Brown int ret; 1019e4ee831fSMark Brown ret = platform_driver_register(&wm831x_buckv_driver); 1020e4ee831fSMark Brown if (ret != 0) 1021e4ee831fSMark Brown pr_err("Failed to register WM831x BUCKV driver: %d\n", ret); 1022e4ee831fSMark Brown 1023e4ee831fSMark Brown ret = platform_driver_register(&wm831x_buckp_driver); 1024e4ee831fSMark Brown if (ret != 0) 1025e4ee831fSMark Brown pr_err("Failed to register WM831x BUCKP driver: %d\n", ret); 1026e4ee831fSMark Brown 10271304850dSMark Brown ret = platform_driver_register(&wm831x_boostp_driver); 10281304850dSMark Brown if (ret != 0) 10291304850dSMark Brown pr_err("Failed to register WM831x BOOST driver: %d\n", ret); 10301304850dSMark Brown 10318267a9baSMark Brown ret = platform_driver_register(&wm831x_epe_driver); 10328267a9baSMark Brown if (ret != 0) 10338267a9baSMark Brown pr_err("Failed to register WM831x EPE driver: %d\n", ret); 10348267a9baSMark Brown 1035e4ee831fSMark Brown return 0; 1036e4ee831fSMark Brown } 1037e4ee831fSMark Brown subsys_initcall(wm831x_dcdc_init); 1038e4ee831fSMark Brown 1039e4ee831fSMark Brown static void __exit wm831x_dcdc_exit(void) 1040e4ee831fSMark Brown { 10418267a9baSMark Brown platform_driver_unregister(&wm831x_epe_driver); 10421304850dSMark Brown platform_driver_unregister(&wm831x_boostp_driver); 1043e4ee831fSMark Brown platform_driver_unregister(&wm831x_buckp_driver); 1044e4ee831fSMark Brown platform_driver_unregister(&wm831x_buckv_driver); 1045e4ee831fSMark Brown } 1046e4ee831fSMark Brown module_exit(wm831x_dcdc_exit); 1047e4ee831fSMark Brown 1048e4ee831fSMark Brown /* Module information */ 1049e4ee831fSMark Brown MODULE_AUTHOR("Mark Brown"); 1050e4ee831fSMark Brown MODULE_DESCRIPTION("WM831x DC-DC convertor driver"); 1051e4ee831fSMark Brown MODULE_LICENSE("GPL"); 1052e4ee831fSMark Brown MODULE_ALIAS("platform:wm831x-buckv"); 1053e4ee831fSMark Brown MODULE_ALIAS("platform:wm831x-buckp"); 1054