1e4ee831fSMark Brown /* 2e4ee831fSMark Brown * wm831x-dcdc.c -- DC-DC buck convertor driver for the WM831x series 3e4ee831fSMark Brown * 4e4ee831fSMark Brown * Copyright 2009 Wolfson Microelectronics PLC. 5e4ee831fSMark Brown * 6e4ee831fSMark Brown * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 7e4ee831fSMark Brown * 8e4ee831fSMark Brown * This program is free software; you can redistribute it and/or modify it 9e4ee831fSMark Brown * under the terms of the GNU General Public License as published by the 10e4ee831fSMark Brown * Free Software Foundation; either version 2 of the License, or (at your 11e4ee831fSMark Brown * option) any later version. 12e4ee831fSMark Brown */ 13e4ee831fSMark Brown 14e4ee831fSMark Brown #include <linux/module.h> 15e4ee831fSMark Brown #include <linux/moduleparam.h> 16e4ee831fSMark Brown #include <linux/init.h> 17e4ee831fSMark Brown #include <linux/bitops.h> 18e4ee831fSMark Brown #include <linux/err.h> 19e4ee831fSMark Brown #include <linux/i2c.h> 20e4ee831fSMark Brown #include <linux/platform_device.h> 21e4ee831fSMark Brown #include <linux/regulator/driver.h> 22e24a04c4SMark Brown #include <linux/regulator/machine.h> 23e24a04c4SMark Brown #include <linux/gpio.h> 245a0e3ad6STejun Heo #include <linux/slab.h> 25e4ee831fSMark Brown 26e4ee831fSMark Brown #include <linux/mfd/wm831x/core.h> 27e4ee831fSMark Brown #include <linux/mfd/wm831x/regulator.h> 28e4ee831fSMark Brown #include <linux/mfd/wm831x/pdata.h> 29e4ee831fSMark Brown 30e4ee831fSMark Brown #define WM831X_BUCKV_MAX_SELECTOR 0x68 31e4ee831fSMark Brown #define WM831X_BUCKP_MAX_SELECTOR 0x66 32e4ee831fSMark Brown 33e4ee831fSMark Brown #define WM831X_DCDC_MODE_FAST 0 34e4ee831fSMark Brown #define WM831X_DCDC_MODE_NORMAL 1 35e4ee831fSMark Brown #define WM831X_DCDC_MODE_IDLE 2 36e4ee831fSMark Brown #define WM831X_DCDC_MODE_STANDBY 3 37e4ee831fSMark Brown 38e4ee831fSMark Brown #define WM831X_DCDC_MAX_NAME 6 39e4ee831fSMark Brown 40e4ee831fSMark Brown /* Register offsets in control block */ 41e4ee831fSMark Brown #define WM831X_DCDC_CONTROL_1 0 42e4ee831fSMark Brown #define WM831X_DCDC_CONTROL_2 1 43e4ee831fSMark Brown #define WM831X_DCDC_ON_CONFIG 2 44e4ee831fSMark Brown #define WM831X_DCDC_SLEEP_CONTROL 3 45e24a04c4SMark Brown #define WM831X_DCDC_DVS_CONTROL 4 46e4ee831fSMark Brown 47e4ee831fSMark Brown /* 48e4ee831fSMark Brown * Shared 49e4ee831fSMark Brown */ 50e4ee831fSMark Brown 51e4ee831fSMark Brown struct wm831x_dcdc { 52e4ee831fSMark Brown char name[WM831X_DCDC_MAX_NAME]; 53e4ee831fSMark Brown struct regulator_desc desc; 54e4ee831fSMark Brown int base; 55e4ee831fSMark Brown struct wm831x *wm831x; 56e4ee831fSMark Brown struct regulator_dev *regulator; 57e24a04c4SMark Brown int dvs_gpio; 58e24a04c4SMark Brown int dvs_gpio_state; 59e24a04c4SMark Brown int on_vsel; 60e24a04c4SMark Brown int dvs_vsel; 61e4ee831fSMark Brown }; 62e4ee831fSMark Brown 63e4ee831fSMark Brown static int wm831x_dcdc_is_enabled(struct regulator_dev *rdev) 64e4ee831fSMark Brown { 65e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 66e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 67e4ee831fSMark Brown int mask = 1 << rdev_get_id(rdev); 68e4ee831fSMark Brown int reg; 69e4ee831fSMark Brown 70e4ee831fSMark Brown reg = wm831x_reg_read(wm831x, WM831X_DCDC_ENABLE); 71e4ee831fSMark Brown if (reg < 0) 72e4ee831fSMark Brown return reg; 73e4ee831fSMark Brown 74e4ee831fSMark Brown if (reg & mask) 75e4ee831fSMark Brown return 1; 76e4ee831fSMark Brown else 77e4ee831fSMark Brown return 0; 78e4ee831fSMark Brown } 79e4ee831fSMark Brown 80e4ee831fSMark Brown static int wm831x_dcdc_enable(struct regulator_dev *rdev) 81e4ee831fSMark Brown { 82e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 83e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 84e4ee831fSMark Brown int mask = 1 << rdev_get_id(rdev); 85e4ee831fSMark Brown 86e4ee831fSMark Brown return wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, mask, mask); 87e4ee831fSMark Brown } 88e4ee831fSMark Brown 89e4ee831fSMark Brown static int wm831x_dcdc_disable(struct regulator_dev *rdev) 90e4ee831fSMark Brown { 91e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 92e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 93e4ee831fSMark Brown int mask = 1 << rdev_get_id(rdev); 94e4ee831fSMark Brown 95e4ee831fSMark Brown return wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, mask, 0); 96e4ee831fSMark Brown } 97e4ee831fSMark Brown 98e4ee831fSMark Brown static unsigned int wm831x_dcdc_get_mode(struct regulator_dev *rdev) 99e4ee831fSMark Brown 100e4ee831fSMark Brown { 101e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 102e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 103e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 104e4ee831fSMark Brown int val; 105e4ee831fSMark Brown 106e4ee831fSMark Brown val = wm831x_reg_read(wm831x, reg); 107e4ee831fSMark Brown if (val < 0) 108e4ee831fSMark Brown return val; 109e4ee831fSMark Brown 110e4ee831fSMark Brown val = (val & WM831X_DC1_ON_MODE_MASK) >> WM831X_DC1_ON_MODE_SHIFT; 111e4ee831fSMark Brown 112e4ee831fSMark Brown switch (val) { 113e4ee831fSMark Brown case WM831X_DCDC_MODE_FAST: 114e4ee831fSMark Brown return REGULATOR_MODE_FAST; 115e4ee831fSMark Brown case WM831X_DCDC_MODE_NORMAL: 116e4ee831fSMark Brown return REGULATOR_MODE_NORMAL; 117e4ee831fSMark Brown case WM831X_DCDC_MODE_STANDBY: 118e4ee831fSMark Brown return REGULATOR_MODE_STANDBY; 119e4ee831fSMark Brown case WM831X_DCDC_MODE_IDLE: 120e4ee831fSMark Brown return REGULATOR_MODE_IDLE; 121e4ee831fSMark Brown default: 122e4ee831fSMark Brown BUG(); 1239ee291a4SMark Brown return -EINVAL; 124e4ee831fSMark Brown } 125e4ee831fSMark Brown } 126e4ee831fSMark Brown 127e4ee831fSMark Brown static int wm831x_dcdc_set_mode_int(struct wm831x *wm831x, int reg, 128e4ee831fSMark Brown unsigned int mode) 129e4ee831fSMark Brown { 130e4ee831fSMark Brown int val; 131e4ee831fSMark Brown 132e4ee831fSMark Brown switch (mode) { 133e4ee831fSMark Brown case REGULATOR_MODE_FAST: 134e4ee831fSMark Brown val = WM831X_DCDC_MODE_FAST; 135e4ee831fSMark Brown break; 136e4ee831fSMark Brown case REGULATOR_MODE_NORMAL: 137e4ee831fSMark Brown val = WM831X_DCDC_MODE_NORMAL; 138e4ee831fSMark Brown break; 139e4ee831fSMark Brown case REGULATOR_MODE_STANDBY: 140e4ee831fSMark Brown val = WM831X_DCDC_MODE_STANDBY; 141e4ee831fSMark Brown break; 142e4ee831fSMark Brown case REGULATOR_MODE_IDLE: 143e4ee831fSMark Brown val = WM831X_DCDC_MODE_IDLE; 144e4ee831fSMark Brown break; 145e4ee831fSMark Brown default: 146e4ee831fSMark Brown return -EINVAL; 147e4ee831fSMark Brown } 148e4ee831fSMark Brown 149e4ee831fSMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC1_ON_MODE_MASK, 150e4ee831fSMark Brown val << WM831X_DC1_ON_MODE_SHIFT); 151e4ee831fSMark Brown } 152e4ee831fSMark Brown 153e4ee831fSMark Brown static int wm831x_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode) 154e4ee831fSMark Brown { 155e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 156e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 157e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 158e4ee831fSMark Brown 159e4ee831fSMark Brown return wm831x_dcdc_set_mode_int(wm831x, reg, mode); 160e4ee831fSMark Brown } 161e4ee831fSMark Brown 162e4ee831fSMark Brown static int wm831x_dcdc_set_suspend_mode(struct regulator_dev *rdev, 163e4ee831fSMark Brown unsigned int mode) 164e4ee831fSMark Brown { 165e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 166e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 167e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 168e4ee831fSMark Brown 169e4ee831fSMark Brown return wm831x_dcdc_set_mode_int(wm831x, reg, mode); 170e4ee831fSMark Brown } 171e4ee831fSMark Brown 172e4ee831fSMark Brown static int wm831x_dcdc_get_status(struct regulator_dev *rdev) 173e4ee831fSMark Brown { 174e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 175e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 176e4ee831fSMark Brown int ret; 177e4ee831fSMark Brown 178e4ee831fSMark Brown /* First, check for errors */ 179e4ee831fSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); 180e4ee831fSMark Brown if (ret < 0) 181e4ee831fSMark Brown return ret; 182e4ee831fSMark Brown 183e4ee831fSMark Brown if (ret & (1 << rdev_get_id(rdev))) { 184e4ee831fSMark Brown dev_dbg(wm831x->dev, "DCDC%d under voltage\n", 185e4ee831fSMark Brown rdev_get_id(rdev) + 1); 186e4ee831fSMark Brown return REGULATOR_STATUS_ERROR; 187e4ee831fSMark Brown } 188e4ee831fSMark Brown 189e4ee831fSMark Brown /* DCDC1 and DCDC2 can additionally detect high voltage/current */ 190e4ee831fSMark Brown if (rdev_get_id(rdev) < 2) { 191e4ee831fSMark Brown if (ret & (WM831X_DC1_OV_STS << rdev_get_id(rdev))) { 192e4ee831fSMark Brown dev_dbg(wm831x->dev, "DCDC%d over voltage\n", 193e4ee831fSMark Brown rdev_get_id(rdev) + 1); 194e4ee831fSMark Brown return REGULATOR_STATUS_ERROR; 195e4ee831fSMark Brown } 196e4ee831fSMark Brown 197e4ee831fSMark Brown if (ret & (WM831X_DC1_HC_STS << rdev_get_id(rdev))) { 198e4ee831fSMark Brown dev_dbg(wm831x->dev, "DCDC%d over current\n", 199e4ee831fSMark Brown rdev_get_id(rdev) + 1); 200e4ee831fSMark Brown return REGULATOR_STATUS_ERROR; 201e4ee831fSMark Brown } 202e4ee831fSMark Brown } 203e4ee831fSMark Brown 204e4ee831fSMark Brown /* Is the regulator on? */ 205e4ee831fSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); 206e4ee831fSMark Brown if (ret < 0) 207e4ee831fSMark Brown return ret; 208e4ee831fSMark Brown if (!(ret & (1 << rdev_get_id(rdev)))) 209e4ee831fSMark Brown return REGULATOR_STATUS_OFF; 210e4ee831fSMark Brown 211e4ee831fSMark Brown /* TODO: When we handle hardware control modes so we can report the 212e4ee831fSMark Brown * current mode. */ 213e4ee831fSMark Brown return REGULATOR_STATUS_ON; 214e4ee831fSMark Brown } 215e4ee831fSMark Brown 216e4ee831fSMark Brown static irqreturn_t wm831x_dcdc_uv_irq(int irq, void *data) 217e4ee831fSMark Brown { 218e4ee831fSMark Brown struct wm831x_dcdc *dcdc = data; 219e4ee831fSMark Brown 220e4ee831fSMark Brown regulator_notifier_call_chain(dcdc->regulator, 221e4ee831fSMark Brown REGULATOR_EVENT_UNDER_VOLTAGE, 222e4ee831fSMark Brown NULL); 223e4ee831fSMark Brown 224e4ee831fSMark Brown return IRQ_HANDLED; 225e4ee831fSMark Brown } 226e4ee831fSMark Brown 227e4ee831fSMark Brown static irqreturn_t wm831x_dcdc_oc_irq(int irq, void *data) 228e4ee831fSMark Brown { 229e4ee831fSMark Brown struct wm831x_dcdc *dcdc = data; 230e4ee831fSMark Brown 231e4ee831fSMark Brown regulator_notifier_call_chain(dcdc->regulator, 232e4ee831fSMark Brown REGULATOR_EVENT_OVER_CURRENT, 233e4ee831fSMark Brown NULL); 234e4ee831fSMark Brown 235e4ee831fSMark Brown return IRQ_HANDLED; 236e4ee831fSMark Brown } 237e4ee831fSMark Brown 238e4ee831fSMark Brown /* 239e4ee831fSMark Brown * BUCKV specifics 240e4ee831fSMark Brown */ 241e4ee831fSMark Brown 242e4ee831fSMark Brown static int wm831x_buckv_list_voltage(struct regulator_dev *rdev, 243e4ee831fSMark Brown unsigned selector) 244e4ee831fSMark Brown { 245e4ee831fSMark Brown if (selector <= 0x8) 246e4ee831fSMark Brown return 600000; 247e4ee831fSMark Brown if (selector <= WM831X_BUCKV_MAX_SELECTOR) 248e4ee831fSMark Brown return 600000 + ((selector - 0x8) * 12500); 249e4ee831fSMark Brown return -EINVAL; 250e4ee831fSMark Brown } 251e4ee831fSMark Brown 252e24a04c4SMark Brown static int wm831x_buckv_select_min_voltage(struct regulator_dev *rdev, 253e4ee831fSMark Brown int min_uV, int max_uV) 254e4ee831fSMark Brown { 255e4ee831fSMark Brown u16 vsel; 256e4ee831fSMark Brown 257e4ee831fSMark Brown if (min_uV < 600000) 258e4ee831fSMark Brown vsel = 0; 259e4ee831fSMark Brown else if (min_uV <= 1800000) 260e4ee831fSMark Brown vsel = ((min_uV - 600000) / 12500) + 8; 261e4ee831fSMark Brown else 262e4ee831fSMark Brown return -EINVAL; 263e4ee831fSMark Brown 264e4ee831fSMark Brown if (wm831x_buckv_list_voltage(rdev, vsel) > max_uV) 265e4ee831fSMark Brown return -EINVAL; 266e4ee831fSMark Brown 267e24a04c4SMark Brown return vsel; 268e24a04c4SMark Brown } 269e24a04c4SMark Brown 270e24a04c4SMark Brown static int wm831x_buckv_select_max_voltage(struct regulator_dev *rdev, 271e24a04c4SMark Brown int min_uV, int max_uV) 272e24a04c4SMark Brown { 273e24a04c4SMark Brown u16 vsel; 274e24a04c4SMark Brown 275e24a04c4SMark Brown if (max_uV < 600000 || max_uV > 1800000) 276e24a04c4SMark Brown return -EINVAL; 277e24a04c4SMark Brown 278e24a04c4SMark Brown vsel = ((max_uV - 600000) / 12500) + 8; 279e24a04c4SMark Brown 280e24a04c4SMark Brown if (wm831x_buckv_list_voltage(rdev, vsel) < min_uV || 281e24a04c4SMark Brown wm831x_buckv_list_voltage(rdev, vsel) < max_uV) 282e24a04c4SMark Brown return -EINVAL; 283e24a04c4SMark Brown 284e24a04c4SMark Brown return vsel; 285e24a04c4SMark Brown } 286e24a04c4SMark Brown 287e24a04c4SMark Brown static int wm831x_buckv_set_dvs(struct regulator_dev *rdev, int state) 288e24a04c4SMark Brown { 289e24a04c4SMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 290e24a04c4SMark Brown 291e24a04c4SMark Brown if (state == dcdc->dvs_gpio_state) 292e24a04c4SMark Brown return 0; 293e24a04c4SMark Brown 294e24a04c4SMark Brown dcdc->dvs_gpio_state = state; 295e24a04c4SMark Brown gpio_set_value(dcdc->dvs_gpio, state); 296e24a04c4SMark Brown 297e24a04c4SMark Brown /* Should wait for DVS state change to be asserted if we have 298e24a04c4SMark Brown * a GPIO for it, for now assume the device is configured 299e24a04c4SMark Brown * for the fastest possible transition. 300e24a04c4SMark Brown */ 301e24a04c4SMark Brown 302e24a04c4SMark Brown return 0; 303e4ee831fSMark Brown } 304e4ee831fSMark Brown 305e4ee831fSMark Brown static int wm831x_buckv_set_voltage(struct regulator_dev *rdev, 3063a93f2a9SMark Brown int min_uV, int max_uV, unsigned *selector) 307e4ee831fSMark Brown { 308e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 309e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 310e24a04c4SMark Brown int on_reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 311e24a04c4SMark Brown int dvs_reg = dcdc->base + WM831X_DCDC_DVS_CONTROL; 312e24a04c4SMark Brown int vsel, ret; 313e4ee831fSMark Brown 314e24a04c4SMark Brown vsel = wm831x_buckv_select_min_voltage(rdev, min_uV, max_uV); 315e24a04c4SMark Brown if (vsel < 0) 316e24a04c4SMark Brown return vsel; 317e24a04c4SMark Brown 3183a93f2a9SMark Brown *selector = vsel; 3193a93f2a9SMark Brown 320e24a04c4SMark Brown /* If this value is already set then do a GPIO update if we can */ 321e24a04c4SMark Brown if (dcdc->dvs_gpio && dcdc->on_vsel == vsel) 322e24a04c4SMark Brown return wm831x_buckv_set_dvs(rdev, 0); 323e24a04c4SMark Brown 324e24a04c4SMark Brown if (dcdc->dvs_gpio && dcdc->dvs_vsel == vsel) 325e24a04c4SMark Brown return wm831x_buckv_set_dvs(rdev, 1); 326e24a04c4SMark Brown 327e24a04c4SMark Brown /* Always set the ON status to the minimum voltage */ 328e24a04c4SMark Brown ret = wm831x_set_bits(wm831x, on_reg, WM831X_DC1_ON_VSEL_MASK, vsel); 329e24a04c4SMark Brown if (ret < 0) 330e24a04c4SMark Brown return ret; 331e24a04c4SMark Brown dcdc->on_vsel = vsel; 332e24a04c4SMark Brown 333e24a04c4SMark Brown if (!dcdc->dvs_gpio) 334e24a04c4SMark Brown return ret; 335e24a04c4SMark Brown 336e24a04c4SMark Brown /* Kick the voltage transition now */ 337e24a04c4SMark Brown ret = wm831x_buckv_set_dvs(rdev, 0); 338e24a04c4SMark Brown if (ret < 0) 339e24a04c4SMark Brown return ret; 340e24a04c4SMark Brown 341e24a04c4SMark Brown /* Set the high voltage as the DVS voltage. This is optimised 342e24a04c4SMark Brown * for CPUfreq usage, most processors will keep the maximum 343e24a04c4SMark Brown * voltage constant and lower the minimum with the frequency. */ 344e24a04c4SMark Brown vsel = wm831x_buckv_select_max_voltage(rdev, min_uV, max_uV); 345e24a04c4SMark Brown if (vsel < 0) { 346e24a04c4SMark Brown /* This should never happen - at worst the same vsel 347e24a04c4SMark Brown * should be chosen */ 348e24a04c4SMark Brown WARN_ON(vsel < 0); 349e24a04c4SMark Brown return 0; 350e24a04c4SMark Brown } 351e24a04c4SMark Brown 352e24a04c4SMark Brown /* Don't bother if it's the same VSEL we're already using */ 353e24a04c4SMark Brown if (vsel == dcdc->on_vsel) 354e24a04c4SMark Brown return 0; 355e24a04c4SMark Brown 356e24a04c4SMark Brown ret = wm831x_set_bits(wm831x, dvs_reg, WM831X_DC1_DVS_VSEL_MASK, vsel); 357e24a04c4SMark Brown if (ret == 0) 358e24a04c4SMark Brown dcdc->dvs_vsel = vsel; 359e24a04c4SMark Brown else 360e24a04c4SMark Brown dev_warn(wm831x->dev, "Failed to set DCDC DVS VSEL: %d\n", 361e24a04c4SMark Brown ret); 362e24a04c4SMark Brown 363e24a04c4SMark Brown return 0; 364e4ee831fSMark Brown } 365e4ee831fSMark Brown 366e4ee831fSMark Brown static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev, 367e4ee831fSMark Brown int uV) 368e4ee831fSMark Brown { 369e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 370e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 371e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 372e24a04c4SMark Brown int vsel; 373e4ee831fSMark Brown 374e24a04c4SMark Brown vsel = wm831x_buckv_select_min_voltage(rdev, uV, uV); 375e24a04c4SMark Brown if (vsel < 0) 376e24a04c4SMark Brown return vsel; 377e24a04c4SMark Brown 378e24a04c4SMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC1_SLP_VSEL_MASK, vsel); 379e4ee831fSMark Brown } 380e4ee831fSMark Brown 381afb8bb80SMark Brown static int wm831x_buckv_get_voltage_sel(struct regulator_dev *rdev) 382e4ee831fSMark Brown { 383e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 384e4ee831fSMark Brown 385e24a04c4SMark Brown if (dcdc->dvs_gpio && dcdc->dvs_gpio_state) 386afb8bb80SMark Brown return dcdc->dvs_vsel; 387e24a04c4SMark Brown else 388afb8bb80SMark Brown return dcdc->on_vsel; 389e4ee831fSMark Brown } 390e4ee831fSMark Brown 391e4ee831fSMark Brown /* Current limit options */ 392e4ee831fSMark Brown static u16 wm831x_dcdc_ilim[] = { 393e4ee831fSMark Brown 125, 250, 375, 500, 625, 750, 875, 1000 394e4ee831fSMark Brown }; 395e4ee831fSMark Brown 396e4ee831fSMark Brown static int wm831x_buckv_set_current_limit(struct regulator_dev *rdev, 397e4ee831fSMark Brown int min_uA, int max_uA) 398e4ee831fSMark Brown { 399e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 400e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 401e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; 402e4ee831fSMark Brown int i; 403e4ee831fSMark Brown 404e4ee831fSMark Brown for (i = 0; i < ARRAY_SIZE(wm831x_dcdc_ilim); i++) { 405e4ee831fSMark Brown if (max_uA <= wm831x_dcdc_ilim[i]) 406e4ee831fSMark Brown break; 407e4ee831fSMark Brown } 408e4ee831fSMark Brown if (i == ARRAY_SIZE(wm831x_dcdc_ilim)) 409e4ee831fSMark Brown return -EINVAL; 410e4ee831fSMark Brown 411e4ee831fSMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC1_HC_THR_MASK, i); 412e4ee831fSMark Brown } 413e4ee831fSMark Brown 414e4ee831fSMark Brown static int wm831x_buckv_get_current_limit(struct regulator_dev *rdev) 415e4ee831fSMark Brown { 416e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 417e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 418e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; 419e4ee831fSMark Brown int val; 420e4ee831fSMark Brown 421e4ee831fSMark Brown val = wm831x_reg_read(wm831x, reg); 422e4ee831fSMark Brown if (val < 0) 423e4ee831fSMark Brown return val; 424e4ee831fSMark Brown 425e4ee831fSMark Brown return wm831x_dcdc_ilim[val & WM831X_DC1_HC_THR_MASK]; 426e4ee831fSMark Brown } 427e4ee831fSMark Brown 428e4ee831fSMark Brown static struct regulator_ops wm831x_buckv_ops = { 429e4ee831fSMark Brown .set_voltage = wm831x_buckv_set_voltage, 430afb8bb80SMark Brown .get_voltage_sel = wm831x_buckv_get_voltage_sel, 431e4ee831fSMark Brown .list_voltage = wm831x_buckv_list_voltage, 432e4ee831fSMark Brown .set_suspend_voltage = wm831x_buckv_set_suspend_voltage, 433e4ee831fSMark Brown .set_current_limit = wm831x_buckv_set_current_limit, 434e4ee831fSMark Brown .get_current_limit = wm831x_buckv_get_current_limit, 435e4ee831fSMark Brown 436e4ee831fSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 437e4ee831fSMark Brown .enable = wm831x_dcdc_enable, 438e4ee831fSMark Brown .disable = wm831x_dcdc_disable, 439e4ee831fSMark Brown .get_status = wm831x_dcdc_get_status, 440e4ee831fSMark Brown .get_mode = wm831x_dcdc_get_mode, 441e4ee831fSMark Brown .set_mode = wm831x_dcdc_set_mode, 442e4ee831fSMark Brown .set_suspend_mode = wm831x_dcdc_set_suspend_mode, 443e4ee831fSMark Brown }; 444e4ee831fSMark Brown 445e24a04c4SMark Brown /* 446e24a04c4SMark Brown * Set up DVS control. We just log errors since we can still run 447e24a04c4SMark Brown * (with reduced performance) if we fail. 448e24a04c4SMark Brown */ 449e24a04c4SMark Brown static __devinit void wm831x_buckv_dvs_init(struct wm831x_dcdc *dcdc, 450e24a04c4SMark Brown struct wm831x_buckv_pdata *pdata) 451e24a04c4SMark Brown { 452e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 453e24a04c4SMark Brown int ret; 454e24a04c4SMark Brown u16 ctrl; 455e24a04c4SMark Brown 456e24a04c4SMark Brown if (!pdata || !pdata->dvs_gpio) 457e24a04c4SMark Brown return; 458e24a04c4SMark Brown 459e24a04c4SMark Brown switch (pdata->dvs_control_src) { 460e24a04c4SMark Brown case 1: 461e24a04c4SMark Brown ctrl = 2 << WM831X_DC1_DVS_SRC_SHIFT; 462e24a04c4SMark Brown break; 463e24a04c4SMark Brown case 2: 464e24a04c4SMark Brown ctrl = 3 << WM831X_DC1_DVS_SRC_SHIFT; 465e24a04c4SMark Brown break; 466e24a04c4SMark Brown default: 467e24a04c4SMark Brown dev_err(wm831x->dev, "Invalid DVS control source %d for %s\n", 468e24a04c4SMark Brown pdata->dvs_control_src, dcdc->name); 469e24a04c4SMark Brown return; 470e24a04c4SMark Brown } 471e24a04c4SMark Brown 472e24a04c4SMark Brown ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL, 473e24a04c4SMark Brown WM831X_DC1_DVS_SRC_MASK, ctrl); 474e24a04c4SMark Brown if (ret < 0) { 475e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to set %s DVS source: %d\n", 476e24a04c4SMark Brown dcdc->name, ret); 477e24a04c4SMark Brown return; 478e24a04c4SMark Brown } 479e24a04c4SMark Brown 480e24a04c4SMark Brown ret = gpio_request(pdata->dvs_gpio, "DCDC DVS"); 481e24a04c4SMark Brown if (ret < 0) { 482e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to get %s DVS GPIO: %d\n", 483e24a04c4SMark Brown dcdc->name, ret); 484e24a04c4SMark Brown return; 485e24a04c4SMark Brown } 486e24a04c4SMark Brown 487e24a04c4SMark Brown /* gpiolib won't let us read the GPIO status so pick the higher 488e24a04c4SMark Brown * of the two existing voltages so we take it as platform data. 489e24a04c4SMark Brown */ 490e24a04c4SMark Brown dcdc->dvs_gpio_state = pdata->dvs_init_state; 491e24a04c4SMark Brown 492e24a04c4SMark Brown ret = gpio_direction_output(pdata->dvs_gpio, dcdc->dvs_gpio_state); 493e24a04c4SMark Brown if (ret < 0) { 494e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to enable %s DVS GPIO: %d\n", 495e24a04c4SMark Brown dcdc->name, ret); 496e24a04c4SMark Brown gpio_free(pdata->dvs_gpio); 497e24a04c4SMark Brown return; 498e24a04c4SMark Brown } 499e24a04c4SMark Brown 500e24a04c4SMark Brown dcdc->dvs_gpio = pdata->dvs_gpio; 501e24a04c4SMark Brown } 502e24a04c4SMark Brown 503e4ee831fSMark Brown static __devinit int wm831x_buckv_probe(struct platform_device *pdev) 504e4ee831fSMark Brown { 505e4ee831fSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 506e4ee831fSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 507e4ee831fSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->dcdc); 508e4ee831fSMark Brown struct wm831x_dcdc *dcdc; 509e4ee831fSMark Brown struct resource *res; 510e4ee831fSMark Brown int ret, irq; 511e4ee831fSMark Brown 512e4ee831fSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 513e4ee831fSMark Brown 514e4ee831fSMark Brown if (pdata == NULL || pdata->dcdc[id] == NULL) 515e4ee831fSMark Brown return -ENODEV; 516e4ee831fSMark Brown 517e4ee831fSMark Brown dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); 518e4ee831fSMark Brown if (dcdc == NULL) { 519e4ee831fSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 520e4ee831fSMark Brown return -ENOMEM; 521e4ee831fSMark Brown } 522e4ee831fSMark Brown 523e4ee831fSMark Brown dcdc->wm831x = wm831x; 524e4ee831fSMark Brown 525e4ee831fSMark Brown res = platform_get_resource(pdev, IORESOURCE_IO, 0); 526e4ee831fSMark Brown if (res == NULL) { 527e4ee831fSMark Brown dev_err(&pdev->dev, "No I/O resource\n"); 528e4ee831fSMark Brown ret = -EINVAL; 529e4ee831fSMark Brown goto err; 530e4ee831fSMark Brown } 531e4ee831fSMark Brown dcdc->base = res->start; 532e4ee831fSMark Brown 533e4ee831fSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 534e4ee831fSMark Brown dcdc->desc.name = dcdc->name; 535e4ee831fSMark Brown dcdc->desc.id = id; 536e4ee831fSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 537e4ee831fSMark Brown dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1; 538e4ee831fSMark Brown dcdc->desc.ops = &wm831x_buckv_ops; 539e4ee831fSMark Brown dcdc->desc.owner = THIS_MODULE; 540e4ee831fSMark Brown 541e24a04c4SMark Brown ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG); 542e24a04c4SMark Brown if (ret < 0) { 543e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to read ON VSEL: %d\n", ret); 544e24a04c4SMark Brown goto err; 545e24a04c4SMark Brown } 546e24a04c4SMark Brown dcdc->on_vsel = ret & WM831X_DC1_ON_VSEL_MASK; 547e24a04c4SMark Brown 548e24a04c4SMark Brown ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG); 549e24a04c4SMark Brown if (ret < 0) { 550e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to read DVS VSEL: %d\n", ret); 551e24a04c4SMark Brown goto err; 552e24a04c4SMark Brown } 553e24a04c4SMark Brown dcdc->dvs_vsel = ret & WM831X_DC1_DVS_VSEL_MASK; 554e24a04c4SMark Brown 555e24a04c4SMark Brown if (pdata->dcdc[id]) 556e24a04c4SMark Brown wm831x_buckv_dvs_init(dcdc, pdata->dcdc[id]->driver_data); 557e24a04c4SMark Brown 558e4ee831fSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, 559e4ee831fSMark Brown pdata->dcdc[id], dcdc); 560e4ee831fSMark Brown if (IS_ERR(dcdc->regulator)) { 561e4ee831fSMark Brown ret = PTR_ERR(dcdc->regulator); 562e4ee831fSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 563e4ee831fSMark Brown id + 1, ret); 564e4ee831fSMark Brown goto err; 565e4ee831fSMark Brown } 566e4ee831fSMark Brown 567e4ee831fSMark Brown irq = platform_get_irq_byname(pdev, "UV"); 568e4ee831fSMark Brown ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_uv_irq, 569e4ee831fSMark Brown IRQF_TRIGGER_RISING, dcdc->name, 570e4ee831fSMark Brown dcdc); 571e4ee831fSMark Brown if (ret != 0) { 572e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 573e4ee831fSMark Brown irq, ret); 574e4ee831fSMark Brown goto err_regulator; 575e4ee831fSMark Brown } 576e4ee831fSMark Brown 577e4ee831fSMark Brown irq = platform_get_irq_byname(pdev, "HC"); 578e4ee831fSMark Brown ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_oc_irq, 579e4ee831fSMark Brown IRQF_TRIGGER_RISING, dcdc->name, 580e4ee831fSMark Brown dcdc); 581e4ee831fSMark Brown if (ret != 0) { 582e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n", 583e4ee831fSMark Brown irq, ret); 584e4ee831fSMark Brown goto err_uv; 585e4ee831fSMark Brown } 586e4ee831fSMark Brown 587e4ee831fSMark Brown platform_set_drvdata(pdev, dcdc); 588e4ee831fSMark Brown 589e4ee831fSMark Brown return 0; 590e4ee831fSMark Brown 591e4ee831fSMark Brown err_uv: 592e4ee831fSMark Brown wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); 593e4ee831fSMark Brown err_regulator: 594e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 595e4ee831fSMark Brown err: 596e24a04c4SMark Brown if (dcdc->dvs_gpio) 597e24a04c4SMark Brown gpio_free(dcdc->dvs_gpio); 598e4ee831fSMark Brown kfree(dcdc); 599e4ee831fSMark Brown return ret; 600e4ee831fSMark Brown } 601e4ee831fSMark Brown 602e4ee831fSMark Brown static __devexit int wm831x_buckv_remove(struct platform_device *pdev) 603e4ee831fSMark Brown { 604e4ee831fSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 605e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 606e4ee831fSMark Brown 607eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 608eb66d565SDmitry Torokhov 609e4ee831fSMark Brown wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "HC"), dcdc); 610e4ee831fSMark Brown wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); 611e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 612e24a04c4SMark Brown if (dcdc->dvs_gpio) 613e24a04c4SMark Brown gpio_free(dcdc->dvs_gpio); 614e4ee831fSMark Brown kfree(dcdc); 615e4ee831fSMark Brown 616e4ee831fSMark Brown return 0; 617e4ee831fSMark Brown } 618e4ee831fSMark Brown 619e4ee831fSMark Brown static struct platform_driver wm831x_buckv_driver = { 620e4ee831fSMark Brown .probe = wm831x_buckv_probe, 621e4ee831fSMark Brown .remove = __devexit_p(wm831x_buckv_remove), 622e4ee831fSMark Brown .driver = { 623e4ee831fSMark Brown .name = "wm831x-buckv", 624eb66d565SDmitry Torokhov .owner = THIS_MODULE, 625e4ee831fSMark Brown }, 626e4ee831fSMark Brown }; 627e4ee831fSMark Brown 628e4ee831fSMark Brown /* 629e4ee831fSMark Brown * BUCKP specifics 630e4ee831fSMark Brown */ 631e4ee831fSMark Brown 632e4ee831fSMark Brown static int wm831x_buckp_list_voltage(struct regulator_dev *rdev, 633e4ee831fSMark Brown unsigned selector) 634e4ee831fSMark Brown { 635e4ee831fSMark Brown if (selector <= WM831X_BUCKP_MAX_SELECTOR) 636e4ee831fSMark Brown return 850000 + (selector * 25000); 637e4ee831fSMark Brown else 638e4ee831fSMark Brown return -EINVAL; 639e4ee831fSMark Brown } 640e4ee831fSMark Brown 641e4ee831fSMark Brown static int wm831x_buckp_set_voltage_int(struct regulator_dev *rdev, int reg, 6423a93f2a9SMark Brown int min_uV, int max_uV, int *selector) 643e4ee831fSMark Brown { 644e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 645e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 646e4ee831fSMark Brown u16 vsel; 647e4ee831fSMark Brown 648e4ee831fSMark Brown if (min_uV <= 34000000) 649e4ee831fSMark Brown vsel = (min_uV - 850000) / 25000; 650e4ee831fSMark Brown else 651e4ee831fSMark Brown return -EINVAL; 652e4ee831fSMark Brown 653e4ee831fSMark Brown if (wm831x_buckp_list_voltage(rdev, vsel) > max_uV) 654e4ee831fSMark Brown return -EINVAL; 655e4ee831fSMark Brown 6563a93f2a9SMark Brown *selector = vsel; 6573a93f2a9SMark Brown 658e4ee831fSMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, vsel); 659e4ee831fSMark Brown } 660e4ee831fSMark Brown 661e4ee831fSMark Brown static int wm831x_buckp_set_voltage(struct regulator_dev *rdev, 6623a93f2a9SMark Brown int min_uV, int max_uV, 6633a93f2a9SMark Brown unsigned *selector) 664e4ee831fSMark Brown { 665e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 666e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 667e4ee831fSMark Brown 6683a93f2a9SMark Brown return wm831x_buckp_set_voltage_int(rdev, reg, min_uV, max_uV, 6693a93f2a9SMark Brown selector); 670e4ee831fSMark Brown } 671e4ee831fSMark Brown 672e4ee831fSMark Brown static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev, 673e4ee831fSMark Brown int uV) 674e4ee831fSMark Brown { 675e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 676e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 6773a93f2a9SMark Brown unsigned selector; 678e4ee831fSMark Brown 6793a93f2a9SMark Brown return wm831x_buckp_set_voltage_int(rdev, reg, uV, uV, &selector); 680e4ee831fSMark Brown } 681e4ee831fSMark Brown 682afb8bb80SMark Brown static int wm831x_buckp_get_voltage_sel(struct regulator_dev *rdev) 683e4ee831fSMark Brown { 684e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 685e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 686e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 687e4ee831fSMark Brown int val; 688e4ee831fSMark Brown 689e4ee831fSMark Brown val = wm831x_reg_read(wm831x, reg); 690e4ee831fSMark Brown if (val < 0) 691e4ee831fSMark Brown return val; 692e4ee831fSMark Brown 693afb8bb80SMark Brown return val & WM831X_DC3_ON_VSEL_MASK; 694e4ee831fSMark Brown } 695e4ee831fSMark Brown 696e4ee831fSMark Brown static struct regulator_ops wm831x_buckp_ops = { 697e4ee831fSMark Brown .set_voltage = wm831x_buckp_set_voltage, 698afb8bb80SMark Brown .get_voltage_sel = wm831x_buckp_get_voltage_sel, 699e4ee831fSMark Brown .list_voltage = wm831x_buckp_list_voltage, 700e4ee831fSMark Brown .set_suspend_voltage = wm831x_buckp_set_suspend_voltage, 701e4ee831fSMark Brown 702e4ee831fSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 703e4ee831fSMark Brown .enable = wm831x_dcdc_enable, 704e4ee831fSMark Brown .disable = wm831x_dcdc_disable, 705e4ee831fSMark Brown .get_status = wm831x_dcdc_get_status, 706e4ee831fSMark Brown .get_mode = wm831x_dcdc_get_mode, 707e4ee831fSMark Brown .set_mode = wm831x_dcdc_set_mode, 708e4ee831fSMark Brown .set_suspend_mode = wm831x_dcdc_set_suspend_mode, 709e4ee831fSMark Brown }; 710e4ee831fSMark Brown 711e4ee831fSMark Brown static __devinit int wm831x_buckp_probe(struct platform_device *pdev) 712e4ee831fSMark Brown { 713e4ee831fSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 714e4ee831fSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 715e4ee831fSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->dcdc); 716e4ee831fSMark Brown struct wm831x_dcdc *dcdc; 717e4ee831fSMark Brown struct resource *res; 718e4ee831fSMark Brown int ret, irq; 719e4ee831fSMark Brown 720e4ee831fSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 721e4ee831fSMark Brown 722e4ee831fSMark Brown if (pdata == NULL || pdata->dcdc[id] == NULL) 723e4ee831fSMark Brown return -ENODEV; 724e4ee831fSMark Brown 725e4ee831fSMark Brown dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); 726e4ee831fSMark Brown if (dcdc == NULL) { 727e4ee831fSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 728e4ee831fSMark Brown return -ENOMEM; 729e4ee831fSMark Brown } 730e4ee831fSMark Brown 731e4ee831fSMark Brown dcdc->wm831x = wm831x; 732e4ee831fSMark Brown 733e4ee831fSMark Brown res = platform_get_resource(pdev, IORESOURCE_IO, 0); 734e4ee831fSMark Brown if (res == NULL) { 735e4ee831fSMark Brown dev_err(&pdev->dev, "No I/O resource\n"); 736e4ee831fSMark Brown ret = -EINVAL; 737e4ee831fSMark Brown goto err; 738e4ee831fSMark Brown } 739e4ee831fSMark Brown dcdc->base = res->start; 740e4ee831fSMark Brown 741e4ee831fSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 742e4ee831fSMark Brown dcdc->desc.name = dcdc->name; 743e4ee831fSMark Brown dcdc->desc.id = id; 744e4ee831fSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 745e4ee831fSMark Brown dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1; 746e4ee831fSMark Brown dcdc->desc.ops = &wm831x_buckp_ops; 747e4ee831fSMark Brown dcdc->desc.owner = THIS_MODULE; 748e4ee831fSMark Brown 749e4ee831fSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, 750e4ee831fSMark Brown pdata->dcdc[id], dcdc); 751e4ee831fSMark Brown if (IS_ERR(dcdc->regulator)) { 752e4ee831fSMark Brown ret = PTR_ERR(dcdc->regulator); 753e4ee831fSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 754e4ee831fSMark Brown id + 1, ret); 755e4ee831fSMark Brown goto err; 756e4ee831fSMark Brown } 757e4ee831fSMark Brown 758e4ee831fSMark Brown irq = platform_get_irq_byname(pdev, "UV"); 759e4ee831fSMark Brown ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_uv_irq, 760e4ee831fSMark Brown IRQF_TRIGGER_RISING, dcdc->name, 761e4ee831fSMark Brown dcdc); 762e4ee831fSMark Brown if (ret != 0) { 763e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 764e4ee831fSMark Brown irq, ret); 765e4ee831fSMark Brown goto err_regulator; 766e4ee831fSMark Brown } 767e4ee831fSMark Brown 768e4ee831fSMark Brown platform_set_drvdata(pdev, dcdc); 769e4ee831fSMark Brown 770e4ee831fSMark Brown return 0; 771e4ee831fSMark Brown 772e4ee831fSMark Brown err_regulator: 773e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 774e4ee831fSMark Brown err: 775e4ee831fSMark Brown kfree(dcdc); 776e4ee831fSMark Brown return ret; 777e4ee831fSMark Brown } 778e4ee831fSMark Brown 779e4ee831fSMark Brown static __devexit int wm831x_buckp_remove(struct platform_device *pdev) 780e4ee831fSMark Brown { 781e4ee831fSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 782e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 783e4ee831fSMark Brown 784eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 785eb66d565SDmitry Torokhov 786e4ee831fSMark Brown wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); 787e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 788e4ee831fSMark Brown kfree(dcdc); 789e4ee831fSMark Brown 790e4ee831fSMark Brown return 0; 791e4ee831fSMark Brown } 792e4ee831fSMark Brown 793e4ee831fSMark Brown static struct platform_driver wm831x_buckp_driver = { 794e4ee831fSMark Brown .probe = wm831x_buckp_probe, 795e4ee831fSMark Brown .remove = __devexit_p(wm831x_buckp_remove), 796e4ee831fSMark Brown .driver = { 797e4ee831fSMark Brown .name = "wm831x-buckp", 798eb66d565SDmitry Torokhov .owner = THIS_MODULE, 799e4ee831fSMark Brown }, 800e4ee831fSMark Brown }; 801e4ee831fSMark Brown 8028267a9baSMark Brown /* 8031304850dSMark Brown * DCDC boost convertors 8041304850dSMark Brown */ 8051304850dSMark Brown 8061304850dSMark Brown static int wm831x_boostp_get_status(struct regulator_dev *rdev) 8071304850dSMark Brown { 8081304850dSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 8091304850dSMark Brown struct wm831x *wm831x = dcdc->wm831x; 8101304850dSMark Brown int ret; 8111304850dSMark Brown 8121304850dSMark Brown /* First, check for errors */ 8131304850dSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); 8141304850dSMark Brown if (ret < 0) 8151304850dSMark Brown return ret; 8161304850dSMark Brown 8171304850dSMark Brown if (ret & (1 << rdev_get_id(rdev))) { 8181304850dSMark Brown dev_dbg(wm831x->dev, "DCDC%d under voltage\n", 8191304850dSMark Brown rdev_get_id(rdev) + 1); 8201304850dSMark Brown return REGULATOR_STATUS_ERROR; 8211304850dSMark Brown } 8221304850dSMark Brown 8231304850dSMark Brown /* Is the regulator on? */ 8241304850dSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); 8251304850dSMark Brown if (ret < 0) 8261304850dSMark Brown return ret; 8271304850dSMark Brown if (ret & (1 << rdev_get_id(rdev))) 8281304850dSMark Brown return REGULATOR_STATUS_ON; 8291304850dSMark Brown else 8301304850dSMark Brown return REGULATOR_STATUS_OFF; 8311304850dSMark Brown } 8321304850dSMark Brown 8331304850dSMark Brown static struct regulator_ops wm831x_boostp_ops = { 8341304850dSMark Brown .get_status = wm831x_boostp_get_status, 8351304850dSMark Brown 8361304850dSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 8371304850dSMark Brown .enable = wm831x_dcdc_enable, 8381304850dSMark Brown .disable = wm831x_dcdc_disable, 8391304850dSMark Brown }; 8401304850dSMark Brown 8411304850dSMark Brown static __devinit int wm831x_boostp_probe(struct platform_device *pdev) 8421304850dSMark Brown { 8431304850dSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 8441304850dSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 8451304850dSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->dcdc); 8461304850dSMark Brown struct wm831x_dcdc *dcdc; 8471304850dSMark Brown struct resource *res; 8481304850dSMark Brown int ret, irq; 8491304850dSMark Brown 8501304850dSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 8511304850dSMark Brown 8521304850dSMark Brown if (pdata == NULL || pdata->dcdc[id] == NULL) 8531304850dSMark Brown return -ENODEV; 8541304850dSMark Brown 8551304850dSMark Brown dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); 8561304850dSMark Brown if (dcdc == NULL) { 8571304850dSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 8581304850dSMark Brown return -ENOMEM; 8591304850dSMark Brown } 8601304850dSMark Brown 8611304850dSMark Brown dcdc->wm831x = wm831x; 8621304850dSMark Brown 8631304850dSMark Brown res = platform_get_resource(pdev, IORESOURCE_IO, 0); 8641304850dSMark Brown if (res == NULL) { 8651304850dSMark Brown dev_err(&pdev->dev, "No I/O resource\n"); 8661304850dSMark Brown ret = -EINVAL; 8671304850dSMark Brown goto err; 8681304850dSMark Brown } 8691304850dSMark Brown dcdc->base = res->start; 8701304850dSMark Brown 8711304850dSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 8721304850dSMark Brown dcdc->desc.name = dcdc->name; 8731304850dSMark Brown dcdc->desc.id = id; 8741304850dSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 8751304850dSMark Brown dcdc->desc.ops = &wm831x_boostp_ops; 8761304850dSMark Brown dcdc->desc.owner = THIS_MODULE; 8771304850dSMark Brown 8781304850dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, 8791304850dSMark Brown pdata->dcdc[id], dcdc); 8801304850dSMark Brown if (IS_ERR(dcdc->regulator)) { 8811304850dSMark Brown ret = PTR_ERR(dcdc->regulator); 8821304850dSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 8831304850dSMark Brown id + 1, ret); 8841304850dSMark Brown goto err; 8851304850dSMark Brown } 8861304850dSMark Brown 8871304850dSMark Brown irq = platform_get_irq_byname(pdev, "UV"); 8881304850dSMark Brown ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_uv_irq, 8891304850dSMark Brown IRQF_TRIGGER_RISING, dcdc->name, 8901304850dSMark Brown dcdc); 8911304850dSMark Brown if (ret != 0) { 8921304850dSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 8931304850dSMark Brown irq, ret); 8941304850dSMark Brown goto err_regulator; 8951304850dSMark Brown } 8961304850dSMark Brown 8971304850dSMark Brown platform_set_drvdata(pdev, dcdc); 8981304850dSMark Brown 8991304850dSMark Brown return 0; 9001304850dSMark Brown 9011304850dSMark Brown err_regulator: 9021304850dSMark Brown regulator_unregister(dcdc->regulator); 9031304850dSMark Brown err: 9041304850dSMark Brown kfree(dcdc); 9051304850dSMark Brown return ret; 9061304850dSMark Brown } 9071304850dSMark Brown 9081304850dSMark Brown static __devexit int wm831x_boostp_remove(struct platform_device *pdev) 9091304850dSMark Brown { 9101304850dSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 9111304850dSMark Brown struct wm831x *wm831x = dcdc->wm831x; 9121304850dSMark Brown 913eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 914eb66d565SDmitry Torokhov 9151304850dSMark Brown wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); 9161304850dSMark Brown regulator_unregister(dcdc->regulator); 9171304850dSMark Brown kfree(dcdc); 9181304850dSMark Brown 9191304850dSMark Brown return 0; 9201304850dSMark Brown } 9211304850dSMark Brown 9221304850dSMark Brown static struct platform_driver wm831x_boostp_driver = { 9231304850dSMark Brown .probe = wm831x_boostp_probe, 9241304850dSMark Brown .remove = __devexit_p(wm831x_boostp_remove), 9251304850dSMark Brown .driver = { 9261304850dSMark Brown .name = "wm831x-boostp", 927eb66d565SDmitry Torokhov .owner = THIS_MODULE, 9281304850dSMark Brown }, 9291304850dSMark Brown }; 9301304850dSMark Brown 9311304850dSMark Brown /* 9328267a9baSMark Brown * External Power Enable 9338267a9baSMark Brown * 9348267a9baSMark Brown * These aren't actually DCDCs but look like them in hardware so share 9358267a9baSMark Brown * code. 9368267a9baSMark Brown */ 9378267a9baSMark Brown 9388267a9baSMark Brown #define WM831X_EPE_BASE 6 9398267a9baSMark Brown 9408267a9baSMark Brown static struct regulator_ops wm831x_epe_ops = { 9418267a9baSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 9428267a9baSMark Brown .enable = wm831x_dcdc_enable, 9438267a9baSMark Brown .disable = wm831x_dcdc_disable, 9448267a9baSMark Brown .get_status = wm831x_dcdc_get_status, 9458267a9baSMark Brown }; 9468267a9baSMark Brown 9478267a9baSMark Brown static __devinit int wm831x_epe_probe(struct platform_device *pdev) 9488267a9baSMark Brown { 9498267a9baSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 9508267a9baSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 9518267a9baSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->epe); 9528267a9baSMark Brown struct wm831x_dcdc *dcdc; 9538267a9baSMark Brown int ret; 9548267a9baSMark Brown 9558267a9baSMark Brown dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1); 9568267a9baSMark Brown 9578267a9baSMark Brown if (pdata == NULL || pdata->epe[id] == NULL) 9588267a9baSMark Brown return -ENODEV; 9598267a9baSMark Brown 9608267a9baSMark Brown dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); 9618267a9baSMark Brown if (dcdc == NULL) { 9628267a9baSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 9638267a9baSMark Brown return -ENOMEM; 9648267a9baSMark Brown } 9658267a9baSMark Brown 9668267a9baSMark Brown dcdc->wm831x = wm831x; 9678267a9baSMark Brown 9688267a9baSMark Brown /* For current parts this is correct; probably need to revisit 9698267a9baSMark Brown * in future. 9708267a9baSMark Brown */ 9718267a9baSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1); 9728267a9baSMark Brown dcdc->desc.name = dcdc->name; 9738267a9baSMark Brown dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */ 9748267a9baSMark Brown dcdc->desc.ops = &wm831x_epe_ops; 9758267a9baSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 9768267a9baSMark Brown dcdc->desc.owner = THIS_MODULE; 9778267a9baSMark Brown 9788267a9baSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, 9798267a9baSMark Brown pdata->epe[id], dcdc); 9808267a9baSMark Brown if (IS_ERR(dcdc->regulator)) { 9818267a9baSMark Brown ret = PTR_ERR(dcdc->regulator); 9828267a9baSMark Brown dev_err(wm831x->dev, "Failed to register EPE%d: %d\n", 9838267a9baSMark Brown id + 1, ret); 9848267a9baSMark Brown goto err; 9858267a9baSMark Brown } 9868267a9baSMark Brown 9878267a9baSMark Brown platform_set_drvdata(pdev, dcdc); 9888267a9baSMark Brown 9898267a9baSMark Brown return 0; 9908267a9baSMark Brown 9918267a9baSMark Brown err: 9928267a9baSMark Brown kfree(dcdc); 9938267a9baSMark Brown return ret; 9948267a9baSMark Brown } 9958267a9baSMark Brown 9968267a9baSMark Brown static __devexit int wm831x_epe_remove(struct platform_device *pdev) 9978267a9baSMark Brown { 9988267a9baSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 9998267a9baSMark Brown 1000eb66d565SDmitry Torokhov platform_set_drvdata(pdev, NULL); 1001eb66d565SDmitry Torokhov 10028267a9baSMark Brown regulator_unregister(dcdc->regulator); 10038267a9baSMark Brown kfree(dcdc); 10048267a9baSMark Brown 10058267a9baSMark Brown return 0; 10068267a9baSMark Brown } 10078267a9baSMark Brown 10088267a9baSMark Brown static struct platform_driver wm831x_epe_driver = { 10098267a9baSMark Brown .probe = wm831x_epe_probe, 10108267a9baSMark Brown .remove = __devexit_p(wm831x_epe_remove), 10118267a9baSMark Brown .driver = { 10128267a9baSMark Brown .name = "wm831x-epe", 1013eb66d565SDmitry Torokhov .owner = THIS_MODULE, 10148267a9baSMark Brown }, 10158267a9baSMark Brown }; 10168267a9baSMark Brown 1017e4ee831fSMark Brown static int __init wm831x_dcdc_init(void) 1018e4ee831fSMark Brown { 1019e4ee831fSMark Brown int ret; 1020e4ee831fSMark Brown ret = platform_driver_register(&wm831x_buckv_driver); 1021e4ee831fSMark Brown if (ret != 0) 1022e4ee831fSMark Brown pr_err("Failed to register WM831x BUCKV driver: %d\n", ret); 1023e4ee831fSMark Brown 1024e4ee831fSMark Brown ret = platform_driver_register(&wm831x_buckp_driver); 1025e4ee831fSMark Brown if (ret != 0) 1026e4ee831fSMark Brown pr_err("Failed to register WM831x BUCKP driver: %d\n", ret); 1027e4ee831fSMark Brown 10281304850dSMark Brown ret = platform_driver_register(&wm831x_boostp_driver); 10291304850dSMark Brown if (ret != 0) 10301304850dSMark Brown pr_err("Failed to register WM831x BOOST driver: %d\n", ret); 10311304850dSMark Brown 10328267a9baSMark Brown ret = platform_driver_register(&wm831x_epe_driver); 10338267a9baSMark Brown if (ret != 0) 10348267a9baSMark Brown pr_err("Failed to register WM831x EPE driver: %d\n", ret); 10358267a9baSMark Brown 1036e4ee831fSMark Brown return 0; 1037e4ee831fSMark Brown } 1038e4ee831fSMark Brown subsys_initcall(wm831x_dcdc_init); 1039e4ee831fSMark Brown 1040e4ee831fSMark Brown static void __exit wm831x_dcdc_exit(void) 1041e4ee831fSMark Brown { 10428267a9baSMark Brown platform_driver_unregister(&wm831x_epe_driver); 10431304850dSMark Brown platform_driver_unregister(&wm831x_boostp_driver); 1044e4ee831fSMark Brown platform_driver_unregister(&wm831x_buckp_driver); 1045e4ee831fSMark Brown platform_driver_unregister(&wm831x_buckv_driver); 1046e4ee831fSMark Brown } 1047e4ee831fSMark Brown module_exit(wm831x_dcdc_exit); 1048e4ee831fSMark Brown 1049e4ee831fSMark Brown /* Module information */ 1050e4ee831fSMark Brown MODULE_AUTHOR("Mark Brown"); 1051e4ee831fSMark Brown MODULE_DESCRIPTION("WM831x DC-DC convertor driver"); 1052e4ee831fSMark Brown MODULE_LICENSE("GPL"); 1053e4ee831fSMark Brown MODULE_ALIAS("platform:wm831x-buckv"); 1054e4ee831fSMark Brown MODULE_ALIAS("platform:wm831x-buckp"); 1055