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> 24e4ee831fSMark Brown 25e4ee831fSMark Brown #include <linux/mfd/wm831x/core.h> 26e4ee831fSMark Brown #include <linux/mfd/wm831x/regulator.h> 27e4ee831fSMark Brown #include <linux/mfd/wm831x/pdata.h> 28e4ee831fSMark Brown 29e4ee831fSMark Brown #define WM831X_BUCKV_MAX_SELECTOR 0x68 30e4ee831fSMark Brown #define WM831X_BUCKP_MAX_SELECTOR 0x66 31e4ee831fSMark Brown 32e4ee831fSMark Brown #define WM831X_DCDC_MODE_FAST 0 33e4ee831fSMark Brown #define WM831X_DCDC_MODE_NORMAL 1 34e4ee831fSMark Brown #define WM831X_DCDC_MODE_IDLE 2 35e4ee831fSMark Brown #define WM831X_DCDC_MODE_STANDBY 3 36e4ee831fSMark Brown 37e4ee831fSMark Brown #define WM831X_DCDC_MAX_NAME 6 38e4ee831fSMark Brown 39e4ee831fSMark Brown /* Register offsets in control block */ 40e4ee831fSMark Brown #define WM831X_DCDC_CONTROL_1 0 41e4ee831fSMark Brown #define WM831X_DCDC_CONTROL_2 1 42e4ee831fSMark Brown #define WM831X_DCDC_ON_CONFIG 2 43e4ee831fSMark Brown #define WM831X_DCDC_SLEEP_CONTROL 3 44e24a04c4SMark Brown #define WM831X_DCDC_DVS_CONTROL 4 45e4ee831fSMark Brown 46e4ee831fSMark Brown /* 47e4ee831fSMark Brown * Shared 48e4ee831fSMark Brown */ 49e4ee831fSMark Brown 50e4ee831fSMark Brown struct wm831x_dcdc { 51e4ee831fSMark Brown char name[WM831X_DCDC_MAX_NAME]; 52e4ee831fSMark Brown struct regulator_desc desc; 53e4ee831fSMark Brown int base; 54e4ee831fSMark Brown struct wm831x *wm831x; 55e4ee831fSMark Brown struct regulator_dev *regulator; 56e24a04c4SMark Brown int dvs_gpio; 57e24a04c4SMark Brown int dvs_gpio_state; 58e24a04c4SMark Brown int on_vsel; 59e24a04c4SMark Brown int dvs_vsel; 60e4ee831fSMark Brown }; 61e4ee831fSMark Brown 62e4ee831fSMark Brown static int wm831x_dcdc_is_enabled(struct regulator_dev *rdev) 63e4ee831fSMark Brown { 64e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 65e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 66e4ee831fSMark Brown int mask = 1 << rdev_get_id(rdev); 67e4ee831fSMark Brown int reg; 68e4ee831fSMark Brown 69e4ee831fSMark Brown reg = wm831x_reg_read(wm831x, WM831X_DCDC_ENABLE); 70e4ee831fSMark Brown if (reg < 0) 71e4ee831fSMark Brown return reg; 72e4ee831fSMark Brown 73e4ee831fSMark Brown if (reg & mask) 74e4ee831fSMark Brown return 1; 75e4ee831fSMark Brown else 76e4ee831fSMark Brown return 0; 77e4ee831fSMark Brown } 78e4ee831fSMark Brown 79e4ee831fSMark Brown static int wm831x_dcdc_enable(struct regulator_dev *rdev) 80e4ee831fSMark Brown { 81e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 82e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 83e4ee831fSMark Brown int mask = 1 << rdev_get_id(rdev); 84e4ee831fSMark Brown 85e4ee831fSMark Brown return wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, mask, mask); 86e4ee831fSMark Brown } 87e4ee831fSMark Brown 88e4ee831fSMark Brown static int wm831x_dcdc_disable(struct regulator_dev *rdev) 89e4ee831fSMark Brown { 90e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 91e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 92e4ee831fSMark Brown int mask = 1 << rdev_get_id(rdev); 93e4ee831fSMark Brown 94e4ee831fSMark Brown return wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, mask, 0); 95e4ee831fSMark Brown } 96e4ee831fSMark Brown 97e4ee831fSMark Brown static unsigned int wm831x_dcdc_get_mode(struct regulator_dev *rdev) 98e4ee831fSMark Brown 99e4ee831fSMark Brown { 100e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 101e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 102e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 103e4ee831fSMark Brown int val; 104e4ee831fSMark Brown 105e4ee831fSMark Brown val = wm831x_reg_read(wm831x, reg); 106e4ee831fSMark Brown if (val < 0) 107e4ee831fSMark Brown return val; 108e4ee831fSMark Brown 109e4ee831fSMark Brown val = (val & WM831X_DC1_ON_MODE_MASK) >> WM831X_DC1_ON_MODE_SHIFT; 110e4ee831fSMark Brown 111e4ee831fSMark Brown switch (val) { 112e4ee831fSMark Brown case WM831X_DCDC_MODE_FAST: 113e4ee831fSMark Brown return REGULATOR_MODE_FAST; 114e4ee831fSMark Brown case WM831X_DCDC_MODE_NORMAL: 115e4ee831fSMark Brown return REGULATOR_MODE_NORMAL; 116e4ee831fSMark Brown case WM831X_DCDC_MODE_STANDBY: 117e4ee831fSMark Brown return REGULATOR_MODE_STANDBY; 118e4ee831fSMark Brown case WM831X_DCDC_MODE_IDLE: 119e4ee831fSMark Brown return REGULATOR_MODE_IDLE; 120e4ee831fSMark Brown default: 121e4ee831fSMark Brown BUG(); 122e4ee831fSMark Brown } 123e4ee831fSMark Brown } 124e4ee831fSMark Brown 125e4ee831fSMark Brown static int wm831x_dcdc_set_mode_int(struct wm831x *wm831x, int reg, 126e4ee831fSMark Brown unsigned int mode) 127e4ee831fSMark Brown { 128e4ee831fSMark Brown int val; 129e4ee831fSMark Brown 130e4ee831fSMark Brown switch (mode) { 131e4ee831fSMark Brown case REGULATOR_MODE_FAST: 132e4ee831fSMark Brown val = WM831X_DCDC_MODE_FAST; 133e4ee831fSMark Brown break; 134e4ee831fSMark Brown case REGULATOR_MODE_NORMAL: 135e4ee831fSMark Brown val = WM831X_DCDC_MODE_NORMAL; 136e4ee831fSMark Brown break; 137e4ee831fSMark Brown case REGULATOR_MODE_STANDBY: 138e4ee831fSMark Brown val = WM831X_DCDC_MODE_STANDBY; 139e4ee831fSMark Brown break; 140e4ee831fSMark Brown case REGULATOR_MODE_IDLE: 141e4ee831fSMark Brown val = WM831X_DCDC_MODE_IDLE; 142e4ee831fSMark Brown break; 143e4ee831fSMark Brown default: 144e4ee831fSMark Brown return -EINVAL; 145e4ee831fSMark Brown } 146e4ee831fSMark Brown 147e4ee831fSMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC1_ON_MODE_MASK, 148e4ee831fSMark Brown val << WM831X_DC1_ON_MODE_SHIFT); 149e4ee831fSMark Brown } 150e4ee831fSMark Brown 151e4ee831fSMark Brown static int wm831x_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode) 152e4ee831fSMark Brown { 153e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 154e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 155e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 156e4ee831fSMark Brown 157e4ee831fSMark Brown return wm831x_dcdc_set_mode_int(wm831x, reg, mode); 158e4ee831fSMark Brown } 159e4ee831fSMark Brown 160e4ee831fSMark Brown static int wm831x_dcdc_set_suspend_mode(struct regulator_dev *rdev, 161e4ee831fSMark Brown unsigned int mode) 162e4ee831fSMark Brown { 163e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 164e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 165e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 166e4ee831fSMark Brown 167e4ee831fSMark Brown return wm831x_dcdc_set_mode_int(wm831x, reg, mode); 168e4ee831fSMark Brown } 169e4ee831fSMark Brown 170e4ee831fSMark Brown static int wm831x_dcdc_get_status(struct regulator_dev *rdev) 171e4ee831fSMark Brown { 172e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 173e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 174e4ee831fSMark Brown int ret; 175e4ee831fSMark Brown 176e4ee831fSMark Brown /* First, check for errors */ 177e4ee831fSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); 178e4ee831fSMark Brown if (ret < 0) 179e4ee831fSMark Brown return ret; 180e4ee831fSMark Brown 181e4ee831fSMark Brown if (ret & (1 << rdev_get_id(rdev))) { 182e4ee831fSMark Brown dev_dbg(wm831x->dev, "DCDC%d under voltage\n", 183e4ee831fSMark Brown rdev_get_id(rdev) + 1); 184e4ee831fSMark Brown return REGULATOR_STATUS_ERROR; 185e4ee831fSMark Brown } 186e4ee831fSMark Brown 187e4ee831fSMark Brown /* DCDC1 and DCDC2 can additionally detect high voltage/current */ 188e4ee831fSMark Brown if (rdev_get_id(rdev) < 2) { 189e4ee831fSMark Brown if (ret & (WM831X_DC1_OV_STS << rdev_get_id(rdev))) { 190e4ee831fSMark Brown dev_dbg(wm831x->dev, "DCDC%d over voltage\n", 191e4ee831fSMark Brown rdev_get_id(rdev) + 1); 192e4ee831fSMark Brown return REGULATOR_STATUS_ERROR; 193e4ee831fSMark Brown } 194e4ee831fSMark Brown 195e4ee831fSMark Brown if (ret & (WM831X_DC1_HC_STS << rdev_get_id(rdev))) { 196e4ee831fSMark Brown dev_dbg(wm831x->dev, "DCDC%d over current\n", 197e4ee831fSMark Brown rdev_get_id(rdev) + 1); 198e4ee831fSMark Brown return REGULATOR_STATUS_ERROR; 199e4ee831fSMark Brown } 200e4ee831fSMark Brown } 201e4ee831fSMark Brown 202e4ee831fSMark Brown /* Is the regulator on? */ 203e4ee831fSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); 204e4ee831fSMark Brown if (ret < 0) 205e4ee831fSMark Brown return ret; 206e4ee831fSMark Brown if (!(ret & (1 << rdev_get_id(rdev)))) 207e4ee831fSMark Brown return REGULATOR_STATUS_OFF; 208e4ee831fSMark Brown 209e4ee831fSMark Brown /* TODO: When we handle hardware control modes so we can report the 210e4ee831fSMark Brown * current mode. */ 211e4ee831fSMark Brown return REGULATOR_STATUS_ON; 212e4ee831fSMark Brown } 213e4ee831fSMark Brown 214e4ee831fSMark Brown static irqreturn_t wm831x_dcdc_uv_irq(int irq, void *data) 215e4ee831fSMark Brown { 216e4ee831fSMark Brown struct wm831x_dcdc *dcdc = data; 217e4ee831fSMark Brown 218e4ee831fSMark Brown regulator_notifier_call_chain(dcdc->regulator, 219e4ee831fSMark Brown REGULATOR_EVENT_UNDER_VOLTAGE, 220e4ee831fSMark Brown NULL); 221e4ee831fSMark Brown 222e4ee831fSMark Brown return IRQ_HANDLED; 223e4ee831fSMark Brown } 224e4ee831fSMark Brown 225e4ee831fSMark Brown static irqreturn_t wm831x_dcdc_oc_irq(int irq, void *data) 226e4ee831fSMark Brown { 227e4ee831fSMark Brown struct wm831x_dcdc *dcdc = data; 228e4ee831fSMark Brown 229e4ee831fSMark Brown regulator_notifier_call_chain(dcdc->regulator, 230e4ee831fSMark Brown REGULATOR_EVENT_OVER_CURRENT, 231e4ee831fSMark Brown NULL); 232e4ee831fSMark Brown 233e4ee831fSMark Brown return IRQ_HANDLED; 234e4ee831fSMark Brown } 235e4ee831fSMark Brown 236e4ee831fSMark Brown /* 237e4ee831fSMark Brown * BUCKV specifics 238e4ee831fSMark Brown */ 239e4ee831fSMark Brown 240e4ee831fSMark Brown static int wm831x_buckv_list_voltage(struct regulator_dev *rdev, 241e4ee831fSMark Brown unsigned selector) 242e4ee831fSMark Brown { 243e4ee831fSMark Brown if (selector <= 0x8) 244e4ee831fSMark Brown return 600000; 245e4ee831fSMark Brown if (selector <= WM831X_BUCKV_MAX_SELECTOR) 246e4ee831fSMark Brown return 600000 + ((selector - 0x8) * 12500); 247e4ee831fSMark Brown return -EINVAL; 248e4ee831fSMark Brown } 249e4ee831fSMark Brown 250e24a04c4SMark Brown static int wm831x_buckv_select_min_voltage(struct regulator_dev *rdev, 251e4ee831fSMark Brown int min_uV, int max_uV) 252e4ee831fSMark Brown { 253e4ee831fSMark Brown u16 vsel; 254e4ee831fSMark Brown 255e4ee831fSMark Brown if (min_uV < 600000) 256e4ee831fSMark Brown vsel = 0; 257e4ee831fSMark Brown else if (min_uV <= 1800000) 258e4ee831fSMark Brown vsel = ((min_uV - 600000) / 12500) + 8; 259e4ee831fSMark Brown else 260e4ee831fSMark Brown return -EINVAL; 261e4ee831fSMark Brown 262e4ee831fSMark Brown if (wm831x_buckv_list_voltage(rdev, vsel) > max_uV) 263e4ee831fSMark Brown return -EINVAL; 264e4ee831fSMark Brown 265e24a04c4SMark Brown return vsel; 266e24a04c4SMark Brown } 267e24a04c4SMark Brown 268e24a04c4SMark Brown static int wm831x_buckv_select_max_voltage(struct regulator_dev *rdev, 269e24a04c4SMark Brown int min_uV, int max_uV) 270e24a04c4SMark Brown { 271e24a04c4SMark Brown u16 vsel; 272e24a04c4SMark Brown 273e24a04c4SMark Brown if (max_uV < 600000 || max_uV > 1800000) 274e24a04c4SMark Brown return -EINVAL; 275e24a04c4SMark Brown 276e24a04c4SMark Brown vsel = ((max_uV - 600000) / 12500) + 8; 277e24a04c4SMark Brown 278e24a04c4SMark Brown if (wm831x_buckv_list_voltage(rdev, vsel) < min_uV || 279e24a04c4SMark Brown wm831x_buckv_list_voltage(rdev, vsel) < max_uV) 280e24a04c4SMark Brown return -EINVAL; 281e24a04c4SMark Brown 282e24a04c4SMark Brown return vsel; 283e24a04c4SMark Brown } 284e24a04c4SMark Brown 285e24a04c4SMark Brown static int wm831x_buckv_set_dvs(struct regulator_dev *rdev, int state) 286e24a04c4SMark Brown { 287e24a04c4SMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 288e24a04c4SMark Brown 289e24a04c4SMark Brown if (state == dcdc->dvs_gpio_state) 290e24a04c4SMark Brown return 0; 291e24a04c4SMark Brown 292e24a04c4SMark Brown dcdc->dvs_gpio_state = state; 293e24a04c4SMark Brown gpio_set_value(dcdc->dvs_gpio, state); 294e24a04c4SMark Brown 295e24a04c4SMark Brown /* Should wait for DVS state change to be asserted if we have 296e24a04c4SMark Brown * a GPIO for it, for now assume the device is configured 297e24a04c4SMark Brown * for the fastest possible transition. 298e24a04c4SMark Brown */ 299e24a04c4SMark Brown 300e24a04c4SMark Brown return 0; 301e4ee831fSMark Brown } 302e4ee831fSMark Brown 303e4ee831fSMark Brown static int wm831x_buckv_set_voltage(struct regulator_dev *rdev, 304e4ee831fSMark Brown int min_uV, int max_uV) 305e4ee831fSMark Brown { 306e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 307e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 308e24a04c4SMark Brown int on_reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 309e24a04c4SMark Brown int dvs_reg = dcdc->base + WM831X_DCDC_DVS_CONTROL; 310e24a04c4SMark Brown int vsel, ret; 311e4ee831fSMark Brown 312e24a04c4SMark Brown vsel = wm831x_buckv_select_min_voltage(rdev, min_uV, max_uV); 313e24a04c4SMark Brown if (vsel < 0) 314e24a04c4SMark Brown return vsel; 315e24a04c4SMark Brown 316e24a04c4SMark Brown /* If this value is already set then do a GPIO update if we can */ 317e24a04c4SMark Brown if (dcdc->dvs_gpio && dcdc->on_vsel == vsel) 318e24a04c4SMark Brown return wm831x_buckv_set_dvs(rdev, 0); 319e24a04c4SMark Brown 320e24a04c4SMark Brown if (dcdc->dvs_gpio && dcdc->dvs_vsel == vsel) 321e24a04c4SMark Brown return wm831x_buckv_set_dvs(rdev, 1); 322e24a04c4SMark Brown 323e24a04c4SMark Brown /* Always set the ON status to the minimum voltage */ 324e24a04c4SMark Brown ret = wm831x_set_bits(wm831x, on_reg, WM831X_DC1_ON_VSEL_MASK, vsel); 325e24a04c4SMark Brown if (ret < 0) 326e24a04c4SMark Brown return ret; 327e24a04c4SMark Brown dcdc->on_vsel = vsel; 328e24a04c4SMark Brown 329e24a04c4SMark Brown if (!dcdc->dvs_gpio) 330e24a04c4SMark Brown return ret; 331e24a04c4SMark Brown 332e24a04c4SMark Brown /* Kick the voltage transition now */ 333e24a04c4SMark Brown ret = wm831x_buckv_set_dvs(rdev, 0); 334e24a04c4SMark Brown if (ret < 0) 335e24a04c4SMark Brown return ret; 336e24a04c4SMark Brown 337e24a04c4SMark Brown /* Set the high voltage as the DVS voltage. This is optimised 338e24a04c4SMark Brown * for CPUfreq usage, most processors will keep the maximum 339e24a04c4SMark Brown * voltage constant and lower the minimum with the frequency. */ 340e24a04c4SMark Brown vsel = wm831x_buckv_select_max_voltage(rdev, min_uV, max_uV); 341e24a04c4SMark Brown if (vsel < 0) { 342e24a04c4SMark Brown /* This should never happen - at worst the same vsel 343e24a04c4SMark Brown * should be chosen */ 344e24a04c4SMark Brown WARN_ON(vsel < 0); 345e24a04c4SMark Brown return 0; 346e24a04c4SMark Brown } 347e24a04c4SMark Brown 348e24a04c4SMark Brown /* Don't bother if it's the same VSEL we're already using */ 349e24a04c4SMark Brown if (vsel == dcdc->on_vsel) 350e24a04c4SMark Brown return 0; 351e24a04c4SMark Brown 352e24a04c4SMark Brown ret = wm831x_set_bits(wm831x, dvs_reg, WM831X_DC1_DVS_VSEL_MASK, vsel); 353e24a04c4SMark Brown if (ret == 0) 354e24a04c4SMark Brown dcdc->dvs_vsel = vsel; 355e24a04c4SMark Brown else 356e24a04c4SMark Brown dev_warn(wm831x->dev, "Failed to set DCDC DVS VSEL: %d\n", 357e24a04c4SMark Brown ret); 358e24a04c4SMark Brown 359e24a04c4SMark Brown return 0; 360e4ee831fSMark Brown } 361e4ee831fSMark Brown 362e4ee831fSMark Brown static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev, 363e4ee831fSMark Brown int uV) 364e4ee831fSMark Brown { 365e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 366e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 367e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 368e24a04c4SMark Brown int vsel; 369e4ee831fSMark Brown 370e24a04c4SMark Brown vsel = wm831x_buckv_select_min_voltage(rdev, uV, uV); 371e24a04c4SMark Brown if (vsel < 0) 372e24a04c4SMark Brown return vsel; 373e24a04c4SMark Brown 374e24a04c4SMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC1_SLP_VSEL_MASK, vsel); 375e4ee831fSMark Brown } 376e4ee831fSMark Brown 377e4ee831fSMark Brown static int wm831x_buckv_get_voltage(struct regulator_dev *rdev) 378e4ee831fSMark Brown { 379e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 380e4ee831fSMark Brown 381e24a04c4SMark Brown if (dcdc->dvs_gpio && dcdc->dvs_gpio_state) 382e24a04c4SMark Brown return wm831x_buckv_list_voltage(rdev, dcdc->dvs_vsel); 383e24a04c4SMark Brown else 384e24a04c4SMark Brown return wm831x_buckv_list_voltage(rdev, dcdc->on_vsel); 385e4ee831fSMark Brown } 386e4ee831fSMark Brown 387e4ee831fSMark Brown /* Current limit options */ 388e4ee831fSMark Brown static u16 wm831x_dcdc_ilim[] = { 389e4ee831fSMark Brown 125, 250, 375, 500, 625, 750, 875, 1000 390e4ee831fSMark Brown }; 391e4ee831fSMark Brown 392e4ee831fSMark Brown static int wm831x_buckv_set_current_limit(struct regulator_dev *rdev, 393e4ee831fSMark Brown int min_uA, int max_uA) 394e4ee831fSMark Brown { 395e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 396e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 397e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; 398e4ee831fSMark Brown int i; 399e4ee831fSMark Brown 400e4ee831fSMark Brown for (i = 0; i < ARRAY_SIZE(wm831x_dcdc_ilim); i++) { 401e4ee831fSMark Brown if (max_uA <= wm831x_dcdc_ilim[i]) 402e4ee831fSMark Brown break; 403e4ee831fSMark Brown } 404e4ee831fSMark Brown if (i == ARRAY_SIZE(wm831x_dcdc_ilim)) 405e4ee831fSMark Brown return -EINVAL; 406e4ee831fSMark Brown 407e4ee831fSMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC1_HC_THR_MASK, i); 408e4ee831fSMark Brown } 409e4ee831fSMark Brown 410e4ee831fSMark Brown static int wm831x_buckv_get_current_limit(struct regulator_dev *rdev) 411e4ee831fSMark Brown { 412e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 413e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 414e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; 415e4ee831fSMark Brown int val; 416e4ee831fSMark Brown 417e4ee831fSMark Brown val = wm831x_reg_read(wm831x, reg); 418e4ee831fSMark Brown if (val < 0) 419e4ee831fSMark Brown return val; 420e4ee831fSMark Brown 421e4ee831fSMark Brown return wm831x_dcdc_ilim[val & WM831X_DC1_HC_THR_MASK]; 422e4ee831fSMark Brown } 423e4ee831fSMark Brown 424e4ee831fSMark Brown static struct regulator_ops wm831x_buckv_ops = { 425e4ee831fSMark Brown .set_voltage = wm831x_buckv_set_voltage, 426e4ee831fSMark Brown .get_voltage = wm831x_buckv_get_voltage, 427e4ee831fSMark Brown .list_voltage = wm831x_buckv_list_voltage, 428e4ee831fSMark Brown .set_suspend_voltage = wm831x_buckv_set_suspend_voltage, 429e4ee831fSMark Brown .set_current_limit = wm831x_buckv_set_current_limit, 430e4ee831fSMark Brown .get_current_limit = wm831x_buckv_get_current_limit, 431e4ee831fSMark Brown 432e4ee831fSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 433e4ee831fSMark Brown .enable = wm831x_dcdc_enable, 434e4ee831fSMark Brown .disable = wm831x_dcdc_disable, 435e4ee831fSMark Brown .get_status = wm831x_dcdc_get_status, 436e4ee831fSMark Brown .get_mode = wm831x_dcdc_get_mode, 437e4ee831fSMark Brown .set_mode = wm831x_dcdc_set_mode, 438e4ee831fSMark Brown .set_suspend_mode = wm831x_dcdc_set_suspend_mode, 439e4ee831fSMark Brown }; 440e4ee831fSMark Brown 441e24a04c4SMark Brown /* 442e24a04c4SMark Brown * Set up DVS control. We just log errors since we can still run 443e24a04c4SMark Brown * (with reduced performance) if we fail. 444e24a04c4SMark Brown */ 445e24a04c4SMark Brown static __devinit void wm831x_buckv_dvs_init(struct wm831x_dcdc *dcdc, 446e24a04c4SMark Brown struct wm831x_buckv_pdata *pdata) 447e24a04c4SMark Brown { 448e24a04c4SMark Brown struct wm831x *wm831x = dcdc->wm831x; 449e24a04c4SMark Brown int ret; 450e24a04c4SMark Brown u16 ctrl; 451e24a04c4SMark Brown 452e24a04c4SMark Brown if (!pdata || !pdata->dvs_gpio) 453e24a04c4SMark Brown return; 454e24a04c4SMark Brown 455e24a04c4SMark Brown switch (pdata->dvs_control_src) { 456e24a04c4SMark Brown case 1: 457e24a04c4SMark Brown ctrl = 2 << WM831X_DC1_DVS_SRC_SHIFT; 458e24a04c4SMark Brown break; 459e24a04c4SMark Brown case 2: 460e24a04c4SMark Brown ctrl = 3 << WM831X_DC1_DVS_SRC_SHIFT; 461e24a04c4SMark Brown break; 462e24a04c4SMark Brown default: 463e24a04c4SMark Brown dev_err(wm831x->dev, "Invalid DVS control source %d for %s\n", 464e24a04c4SMark Brown pdata->dvs_control_src, dcdc->name); 465e24a04c4SMark Brown return; 466e24a04c4SMark Brown } 467e24a04c4SMark Brown 468e24a04c4SMark Brown ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL, 469e24a04c4SMark Brown WM831X_DC1_DVS_SRC_MASK, ctrl); 470e24a04c4SMark Brown if (ret < 0) { 471e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to set %s DVS source: %d\n", 472e24a04c4SMark Brown dcdc->name, ret); 473e24a04c4SMark Brown return; 474e24a04c4SMark Brown } 475e24a04c4SMark Brown 476e24a04c4SMark Brown ret = gpio_request(pdata->dvs_gpio, "DCDC DVS"); 477e24a04c4SMark Brown if (ret < 0) { 478e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to get %s DVS GPIO: %d\n", 479e24a04c4SMark Brown dcdc->name, ret); 480e24a04c4SMark Brown return; 481e24a04c4SMark Brown } 482e24a04c4SMark Brown 483e24a04c4SMark Brown /* gpiolib won't let us read the GPIO status so pick the higher 484e24a04c4SMark Brown * of the two existing voltages so we take it as platform data. 485e24a04c4SMark Brown */ 486e24a04c4SMark Brown dcdc->dvs_gpio_state = pdata->dvs_init_state; 487e24a04c4SMark Brown 488e24a04c4SMark Brown ret = gpio_direction_output(pdata->dvs_gpio, dcdc->dvs_gpio_state); 489e24a04c4SMark Brown if (ret < 0) { 490e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to enable %s DVS GPIO: %d\n", 491e24a04c4SMark Brown dcdc->name, ret); 492e24a04c4SMark Brown gpio_free(pdata->dvs_gpio); 493e24a04c4SMark Brown return; 494e24a04c4SMark Brown } 495e24a04c4SMark Brown 496e24a04c4SMark Brown dcdc->dvs_gpio = pdata->dvs_gpio; 497e24a04c4SMark Brown } 498e24a04c4SMark Brown 499e4ee831fSMark Brown static __devinit int wm831x_buckv_probe(struct platform_device *pdev) 500e4ee831fSMark Brown { 501e4ee831fSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 502e4ee831fSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 503e4ee831fSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->dcdc); 504e4ee831fSMark Brown struct wm831x_dcdc *dcdc; 505e4ee831fSMark Brown struct resource *res; 506e4ee831fSMark Brown int ret, irq; 507e4ee831fSMark Brown 508e4ee831fSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 509e4ee831fSMark Brown 510e4ee831fSMark Brown if (pdata == NULL || pdata->dcdc[id] == NULL) 511e4ee831fSMark Brown return -ENODEV; 512e4ee831fSMark Brown 513e4ee831fSMark Brown dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); 514e4ee831fSMark Brown if (dcdc == NULL) { 515e4ee831fSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 516e4ee831fSMark Brown return -ENOMEM; 517e4ee831fSMark Brown } 518e4ee831fSMark Brown 519e4ee831fSMark Brown dcdc->wm831x = wm831x; 520e4ee831fSMark Brown 521e4ee831fSMark Brown res = platform_get_resource(pdev, IORESOURCE_IO, 0); 522e4ee831fSMark Brown if (res == NULL) { 523e4ee831fSMark Brown dev_err(&pdev->dev, "No I/O resource\n"); 524e4ee831fSMark Brown ret = -EINVAL; 525e4ee831fSMark Brown goto err; 526e4ee831fSMark Brown } 527e4ee831fSMark Brown dcdc->base = res->start; 528e4ee831fSMark Brown 529e4ee831fSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 530e4ee831fSMark Brown dcdc->desc.name = dcdc->name; 531e4ee831fSMark Brown dcdc->desc.id = id; 532e4ee831fSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 533e4ee831fSMark Brown dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1; 534e4ee831fSMark Brown dcdc->desc.ops = &wm831x_buckv_ops; 535e4ee831fSMark Brown dcdc->desc.owner = THIS_MODULE; 536e4ee831fSMark Brown 537e24a04c4SMark Brown ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG); 538e24a04c4SMark Brown if (ret < 0) { 539e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to read ON VSEL: %d\n", ret); 540e24a04c4SMark Brown goto err; 541e24a04c4SMark Brown } 542e24a04c4SMark Brown dcdc->on_vsel = ret & WM831X_DC1_ON_VSEL_MASK; 543e24a04c4SMark Brown 544e24a04c4SMark Brown ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG); 545e24a04c4SMark Brown if (ret < 0) { 546e24a04c4SMark Brown dev_err(wm831x->dev, "Failed to read DVS VSEL: %d\n", ret); 547e24a04c4SMark Brown goto err; 548e24a04c4SMark Brown } 549e24a04c4SMark Brown dcdc->dvs_vsel = ret & WM831X_DC1_DVS_VSEL_MASK; 550e24a04c4SMark Brown 551e24a04c4SMark Brown if (pdata->dcdc[id]) 552e24a04c4SMark Brown wm831x_buckv_dvs_init(dcdc, pdata->dcdc[id]->driver_data); 553e24a04c4SMark Brown 554e4ee831fSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, 555e4ee831fSMark Brown pdata->dcdc[id], dcdc); 556e4ee831fSMark Brown if (IS_ERR(dcdc->regulator)) { 557e4ee831fSMark Brown ret = PTR_ERR(dcdc->regulator); 558e4ee831fSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 559e4ee831fSMark Brown id + 1, ret); 560e4ee831fSMark Brown goto err; 561e4ee831fSMark Brown } 562e4ee831fSMark Brown 563e4ee831fSMark Brown irq = platform_get_irq_byname(pdev, "UV"); 564e4ee831fSMark Brown ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_uv_irq, 565e4ee831fSMark Brown IRQF_TRIGGER_RISING, dcdc->name, 566e4ee831fSMark Brown dcdc); 567e4ee831fSMark Brown if (ret != 0) { 568e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 569e4ee831fSMark Brown irq, ret); 570e4ee831fSMark Brown goto err_regulator; 571e4ee831fSMark Brown } 572e4ee831fSMark Brown 573e4ee831fSMark Brown irq = platform_get_irq_byname(pdev, "HC"); 574e4ee831fSMark Brown ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_oc_irq, 575e4ee831fSMark Brown IRQF_TRIGGER_RISING, dcdc->name, 576e4ee831fSMark Brown dcdc); 577e4ee831fSMark Brown if (ret != 0) { 578e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n", 579e4ee831fSMark Brown irq, ret); 580e4ee831fSMark Brown goto err_uv; 581e4ee831fSMark Brown } 582e4ee831fSMark Brown 583e4ee831fSMark Brown platform_set_drvdata(pdev, dcdc); 584e4ee831fSMark Brown 585e4ee831fSMark Brown return 0; 586e4ee831fSMark Brown 587e4ee831fSMark Brown err_uv: 588e4ee831fSMark Brown wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); 589e4ee831fSMark Brown err_regulator: 590e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 591e4ee831fSMark Brown err: 592e24a04c4SMark Brown if (dcdc->dvs_gpio) 593e24a04c4SMark Brown gpio_free(dcdc->dvs_gpio); 594e4ee831fSMark Brown kfree(dcdc); 595e4ee831fSMark Brown return ret; 596e4ee831fSMark Brown } 597e4ee831fSMark Brown 598e4ee831fSMark Brown static __devexit int wm831x_buckv_remove(struct platform_device *pdev) 599e4ee831fSMark Brown { 600e4ee831fSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 601e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 602e4ee831fSMark Brown 603e4ee831fSMark Brown wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "HC"), dcdc); 604e4ee831fSMark Brown wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); 605e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 606e24a04c4SMark Brown if (dcdc->dvs_gpio) 607e24a04c4SMark Brown gpio_free(dcdc->dvs_gpio); 608e4ee831fSMark Brown kfree(dcdc); 609e4ee831fSMark Brown 610e4ee831fSMark Brown return 0; 611e4ee831fSMark Brown } 612e4ee831fSMark Brown 613e4ee831fSMark Brown static struct platform_driver wm831x_buckv_driver = { 614e4ee831fSMark Brown .probe = wm831x_buckv_probe, 615e4ee831fSMark Brown .remove = __devexit_p(wm831x_buckv_remove), 616e4ee831fSMark Brown .driver = { 617e4ee831fSMark Brown .name = "wm831x-buckv", 618e4ee831fSMark Brown }, 619e4ee831fSMark Brown }; 620e4ee831fSMark Brown 621e4ee831fSMark Brown /* 622e4ee831fSMark Brown * BUCKP specifics 623e4ee831fSMark Brown */ 624e4ee831fSMark Brown 625e4ee831fSMark Brown static int wm831x_buckp_list_voltage(struct regulator_dev *rdev, 626e4ee831fSMark Brown unsigned selector) 627e4ee831fSMark Brown { 628e4ee831fSMark Brown if (selector <= WM831X_BUCKP_MAX_SELECTOR) 629e4ee831fSMark Brown return 850000 + (selector * 25000); 630e4ee831fSMark Brown else 631e4ee831fSMark Brown return -EINVAL; 632e4ee831fSMark Brown } 633e4ee831fSMark Brown 634e4ee831fSMark Brown static int wm831x_buckp_set_voltage_int(struct regulator_dev *rdev, int reg, 635e4ee831fSMark Brown int min_uV, int max_uV) 636e4ee831fSMark Brown { 637e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 638e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 639e4ee831fSMark Brown u16 vsel; 640e4ee831fSMark Brown 641e4ee831fSMark Brown if (min_uV <= 34000000) 642e4ee831fSMark Brown vsel = (min_uV - 850000) / 25000; 643e4ee831fSMark Brown else 644e4ee831fSMark Brown return -EINVAL; 645e4ee831fSMark Brown 646e4ee831fSMark Brown if (wm831x_buckp_list_voltage(rdev, vsel) > max_uV) 647e4ee831fSMark Brown return -EINVAL; 648e4ee831fSMark Brown 649e4ee831fSMark Brown return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, vsel); 650e4ee831fSMark Brown } 651e4ee831fSMark Brown 652e4ee831fSMark Brown static int wm831x_buckp_set_voltage(struct regulator_dev *rdev, 653e4ee831fSMark Brown int min_uV, int max_uV) 654e4ee831fSMark Brown { 655e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 656e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 657e4ee831fSMark Brown 658e4ee831fSMark Brown return wm831x_buckp_set_voltage_int(rdev, reg, min_uV, max_uV); 659e4ee831fSMark Brown } 660e4ee831fSMark Brown 661e4ee831fSMark Brown static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev, 662e4ee831fSMark Brown int uV) 663e4ee831fSMark Brown { 664e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 665e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 666e4ee831fSMark Brown 667e4ee831fSMark Brown return wm831x_buckp_set_voltage_int(rdev, reg, uV, uV); 668e4ee831fSMark Brown } 669e4ee831fSMark Brown 670e4ee831fSMark Brown static int wm831x_buckp_get_voltage(struct regulator_dev *rdev) 671e4ee831fSMark Brown { 672e4ee831fSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 673e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 674e4ee831fSMark Brown u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 675e4ee831fSMark Brown int val; 676e4ee831fSMark Brown 677e4ee831fSMark Brown val = wm831x_reg_read(wm831x, reg); 678e4ee831fSMark Brown if (val < 0) 679e4ee831fSMark Brown return val; 680e4ee831fSMark Brown 681e4ee831fSMark Brown return wm831x_buckp_list_voltage(rdev, val & WM831X_DC3_ON_VSEL_MASK); 682e4ee831fSMark Brown } 683e4ee831fSMark Brown 684e4ee831fSMark Brown static struct regulator_ops wm831x_buckp_ops = { 685e4ee831fSMark Brown .set_voltage = wm831x_buckp_set_voltage, 686e4ee831fSMark Brown .get_voltage = wm831x_buckp_get_voltage, 687e4ee831fSMark Brown .list_voltage = wm831x_buckp_list_voltage, 688e4ee831fSMark Brown .set_suspend_voltage = wm831x_buckp_set_suspend_voltage, 689e4ee831fSMark Brown 690e4ee831fSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 691e4ee831fSMark Brown .enable = wm831x_dcdc_enable, 692e4ee831fSMark Brown .disable = wm831x_dcdc_disable, 693e4ee831fSMark Brown .get_status = wm831x_dcdc_get_status, 694e4ee831fSMark Brown .get_mode = wm831x_dcdc_get_mode, 695e4ee831fSMark Brown .set_mode = wm831x_dcdc_set_mode, 696e4ee831fSMark Brown .set_suspend_mode = wm831x_dcdc_set_suspend_mode, 697e4ee831fSMark Brown }; 698e4ee831fSMark Brown 699e4ee831fSMark Brown static __devinit int wm831x_buckp_probe(struct platform_device *pdev) 700e4ee831fSMark Brown { 701e4ee831fSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 702e4ee831fSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 703e4ee831fSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->dcdc); 704e4ee831fSMark Brown struct wm831x_dcdc *dcdc; 705e4ee831fSMark Brown struct resource *res; 706e4ee831fSMark Brown int ret, irq; 707e4ee831fSMark Brown 708e4ee831fSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 709e4ee831fSMark Brown 710e4ee831fSMark Brown if (pdata == NULL || pdata->dcdc[id] == NULL) 711e4ee831fSMark Brown return -ENODEV; 712e4ee831fSMark Brown 713e4ee831fSMark Brown dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); 714e4ee831fSMark Brown if (dcdc == NULL) { 715e4ee831fSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 716e4ee831fSMark Brown return -ENOMEM; 717e4ee831fSMark Brown } 718e4ee831fSMark Brown 719e4ee831fSMark Brown dcdc->wm831x = wm831x; 720e4ee831fSMark Brown 721e4ee831fSMark Brown res = platform_get_resource(pdev, IORESOURCE_IO, 0); 722e4ee831fSMark Brown if (res == NULL) { 723e4ee831fSMark Brown dev_err(&pdev->dev, "No I/O resource\n"); 724e4ee831fSMark Brown ret = -EINVAL; 725e4ee831fSMark Brown goto err; 726e4ee831fSMark Brown } 727e4ee831fSMark Brown dcdc->base = res->start; 728e4ee831fSMark Brown 729e4ee831fSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 730e4ee831fSMark Brown dcdc->desc.name = dcdc->name; 731e4ee831fSMark Brown dcdc->desc.id = id; 732e4ee831fSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 733e4ee831fSMark Brown dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1; 734e4ee831fSMark Brown dcdc->desc.ops = &wm831x_buckp_ops; 735e4ee831fSMark Brown dcdc->desc.owner = THIS_MODULE; 736e4ee831fSMark Brown 737e4ee831fSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, 738e4ee831fSMark Brown pdata->dcdc[id], dcdc); 739e4ee831fSMark Brown if (IS_ERR(dcdc->regulator)) { 740e4ee831fSMark Brown ret = PTR_ERR(dcdc->regulator); 741e4ee831fSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 742e4ee831fSMark Brown id + 1, ret); 743e4ee831fSMark Brown goto err; 744e4ee831fSMark Brown } 745e4ee831fSMark Brown 746e4ee831fSMark Brown irq = platform_get_irq_byname(pdev, "UV"); 747e4ee831fSMark Brown ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_uv_irq, 748e4ee831fSMark Brown IRQF_TRIGGER_RISING, dcdc->name, 749e4ee831fSMark Brown dcdc); 750e4ee831fSMark Brown if (ret != 0) { 751e4ee831fSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 752e4ee831fSMark Brown irq, ret); 753e4ee831fSMark Brown goto err_regulator; 754e4ee831fSMark Brown } 755e4ee831fSMark Brown 756e4ee831fSMark Brown platform_set_drvdata(pdev, dcdc); 757e4ee831fSMark Brown 758e4ee831fSMark Brown return 0; 759e4ee831fSMark Brown 760e4ee831fSMark Brown err_regulator: 761e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 762e4ee831fSMark Brown err: 763e4ee831fSMark Brown kfree(dcdc); 764e4ee831fSMark Brown return ret; 765e4ee831fSMark Brown } 766e4ee831fSMark Brown 767e4ee831fSMark Brown static __devexit int wm831x_buckp_remove(struct platform_device *pdev) 768e4ee831fSMark Brown { 769e4ee831fSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 770e4ee831fSMark Brown struct wm831x *wm831x = dcdc->wm831x; 771e4ee831fSMark Brown 772e4ee831fSMark Brown wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); 773e4ee831fSMark Brown regulator_unregister(dcdc->regulator); 774e4ee831fSMark Brown kfree(dcdc); 775e4ee831fSMark Brown 776e4ee831fSMark Brown return 0; 777e4ee831fSMark Brown } 778e4ee831fSMark Brown 779e4ee831fSMark Brown static struct platform_driver wm831x_buckp_driver = { 780e4ee831fSMark Brown .probe = wm831x_buckp_probe, 781e4ee831fSMark Brown .remove = __devexit_p(wm831x_buckp_remove), 782e4ee831fSMark Brown .driver = { 783e4ee831fSMark Brown .name = "wm831x-buckp", 784e4ee831fSMark Brown }, 785e4ee831fSMark Brown }; 786e4ee831fSMark Brown 7878267a9baSMark Brown /* 7881304850dSMark Brown * DCDC boost convertors 7891304850dSMark Brown */ 7901304850dSMark Brown 7911304850dSMark Brown static int wm831x_boostp_get_status(struct regulator_dev *rdev) 7921304850dSMark Brown { 7931304850dSMark Brown struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 7941304850dSMark Brown struct wm831x *wm831x = dcdc->wm831x; 7951304850dSMark Brown int ret; 7961304850dSMark Brown 7971304850dSMark Brown /* First, check for errors */ 7981304850dSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); 7991304850dSMark Brown if (ret < 0) 8001304850dSMark Brown return ret; 8011304850dSMark Brown 8021304850dSMark Brown if (ret & (1 << rdev_get_id(rdev))) { 8031304850dSMark Brown dev_dbg(wm831x->dev, "DCDC%d under voltage\n", 8041304850dSMark Brown rdev_get_id(rdev) + 1); 8051304850dSMark Brown return REGULATOR_STATUS_ERROR; 8061304850dSMark Brown } 8071304850dSMark Brown 8081304850dSMark Brown /* Is the regulator on? */ 8091304850dSMark Brown ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); 8101304850dSMark Brown if (ret < 0) 8111304850dSMark Brown return ret; 8121304850dSMark Brown if (ret & (1 << rdev_get_id(rdev))) 8131304850dSMark Brown return REGULATOR_STATUS_ON; 8141304850dSMark Brown else 8151304850dSMark Brown return REGULATOR_STATUS_OFF; 8161304850dSMark Brown } 8171304850dSMark Brown 8181304850dSMark Brown static struct regulator_ops wm831x_boostp_ops = { 8191304850dSMark Brown .get_status = wm831x_boostp_get_status, 8201304850dSMark Brown 8211304850dSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 8221304850dSMark Brown .enable = wm831x_dcdc_enable, 8231304850dSMark Brown .disable = wm831x_dcdc_disable, 8241304850dSMark Brown }; 8251304850dSMark Brown 8261304850dSMark Brown static __devinit int wm831x_boostp_probe(struct platform_device *pdev) 8271304850dSMark Brown { 8281304850dSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 8291304850dSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 8301304850dSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->dcdc); 8311304850dSMark Brown struct wm831x_dcdc *dcdc; 8321304850dSMark Brown struct resource *res; 8331304850dSMark Brown int ret, irq; 8341304850dSMark Brown 8351304850dSMark Brown dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 8361304850dSMark Brown 8371304850dSMark Brown if (pdata == NULL || pdata->dcdc[id] == NULL) 8381304850dSMark Brown return -ENODEV; 8391304850dSMark Brown 8401304850dSMark Brown dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); 8411304850dSMark Brown if (dcdc == NULL) { 8421304850dSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 8431304850dSMark Brown return -ENOMEM; 8441304850dSMark Brown } 8451304850dSMark Brown 8461304850dSMark Brown dcdc->wm831x = wm831x; 8471304850dSMark Brown 8481304850dSMark Brown res = platform_get_resource(pdev, IORESOURCE_IO, 0); 8491304850dSMark Brown if (res == NULL) { 8501304850dSMark Brown dev_err(&pdev->dev, "No I/O resource\n"); 8511304850dSMark Brown ret = -EINVAL; 8521304850dSMark Brown goto err; 8531304850dSMark Brown } 8541304850dSMark Brown dcdc->base = res->start; 8551304850dSMark Brown 8561304850dSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 8571304850dSMark Brown dcdc->desc.name = dcdc->name; 8581304850dSMark Brown dcdc->desc.id = id; 8591304850dSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 8601304850dSMark Brown dcdc->desc.ops = &wm831x_boostp_ops; 8611304850dSMark Brown dcdc->desc.owner = THIS_MODULE; 8621304850dSMark Brown 8631304850dSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, 8641304850dSMark Brown pdata->dcdc[id], dcdc); 8651304850dSMark Brown if (IS_ERR(dcdc->regulator)) { 8661304850dSMark Brown ret = PTR_ERR(dcdc->regulator); 8671304850dSMark Brown dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 8681304850dSMark Brown id + 1, ret); 8691304850dSMark Brown goto err; 8701304850dSMark Brown } 8711304850dSMark Brown 8721304850dSMark Brown irq = platform_get_irq_byname(pdev, "UV"); 8731304850dSMark Brown ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_uv_irq, 8741304850dSMark Brown IRQF_TRIGGER_RISING, dcdc->name, 8751304850dSMark Brown dcdc); 8761304850dSMark Brown if (ret != 0) { 8771304850dSMark Brown dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 8781304850dSMark Brown irq, ret); 8791304850dSMark Brown goto err_regulator; 8801304850dSMark Brown } 8811304850dSMark Brown 8821304850dSMark Brown platform_set_drvdata(pdev, dcdc); 8831304850dSMark Brown 8841304850dSMark Brown return 0; 8851304850dSMark Brown 8861304850dSMark Brown err_regulator: 8871304850dSMark Brown regulator_unregister(dcdc->regulator); 8881304850dSMark Brown err: 8891304850dSMark Brown kfree(dcdc); 8901304850dSMark Brown return ret; 8911304850dSMark Brown } 8921304850dSMark Brown 8931304850dSMark Brown static __devexit int wm831x_boostp_remove(struct platform_device *pdev) 8941304850dSMark Brown { 8951304850dSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 8961304850dSMark Brown struct wm831x *wm831x = dcdc->wm831x; 8971304850dSMark Brown 8981304850dSMark Brown wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); 8991304850dSMark Brown regulator_unregister(dcdc->regulator); 9001304850dSMark Brown kfree(dcdc); 9011304850dSMark Brown 9021304850dSMark Brown return 0; 9031304850dSMark Brown } 9041304850dSMark Brown 9051304850dSMark Brown static struct platform_driver wm831x_boostp_driver = { 9061304850dSMark Brown .probe = wm831x_boostp_probe, 9071304850dSMark Brown .remove = __devexit_p(wm831x_boostp_remove), 9081304850dSMark Brown .driver = { 9091304850dSMark Brown .name = "wm831x-boostp", 9101304850dSMark Brown }, 9111304850dSMark Brown }; 9121304850dSMark Brown 9131304850dSMark Brown /* 9148267a9baSMark Brown * External Power Enable 9158267a9baSMark Brown * 9168267a9baSMark Brown * These aren't actually DCDCs but look like them in hardware so share 9178267a9baSMark Brown * code. 9188267a9baSMark Brown */ 9198267a9baSMark Brown 9208267a9baSMark Brown #define WM831X_EPE_BASE 6 9218267a9baSMark Brown 9228267a9baSMark Brown static struct regulator_ops wm831x_epe_ops = { 9238267a9baSMark Brown .is_enabled = wm831x_dcdc_is_enabled, 9248267a9baSMark Brown .enable = wm831x_dcdc_enable, 9258267a9baSMark Brown .disable = wm831x_dcdc_disable, 9268267a9baSMark Brown .get_status = wm831x_dcdc_get_status, 9278267a9baSMark Brown }; 9288267a9baSMark Brown 9298267a9baSMark Brown static __devinit int wm831x_epe_probe(struct platform_device *pdev) 9308267a9baSMark Brown { 9318267a9baSMark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 9328267a9baSMark Brown struct wm831x_pdata *pdata = wm831x->dev->platform_data; 9338267a9baSMark Brown int id = pdev->id % ARRAY_SIZE(pdata->epe); 9348267a9baSMark Brown struct wm831x_dcdc *dcdc; 9358267a9baSMark Brown int ret; 9368267a9baSMark Brown 9378267a9baSMark Brown dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1); 9388267a9baSMark Brown 9398267a9baSMark Brown if (pdata == NULL || pdata->epe[id] == NULL) 9408267a9baSMark Brown return -ENODEV; 9418267a9baSMark Brown 9428267a9baSMark Brown dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); 9438267a9baSMark Brown if (dcdc == NULL) { 9448267a9baSMark Brown dev_err(&pdev->dev, "Unable to allocate private data\n"); 9458267a9baSMark Brown return -ENOMEM; 9468267a9baSMark Brown } 9478267a9baSMark Brown 9488267a9baSMark Brown dcdc->wm831x = wm831x; 9498267a9baSMark Brown 9508267a9baSMark Brown /* For current parts this is correct; probably need to revisit 9518267a9baSMark Brown * in future. 9528267a9baSMark Brown */ 9538267a9baSMark Brown snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1); 9548267a9baSMark Brown dcdc->desc.name = dcdc->name; 9558267a9baSMark Brown dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */ 9568267a9baSMark Brown dcdc->desc.ops = &wm831x_epe_ops; 9578267a9baSMark Brown dcdc->desc.type = REGULATOR_VOLTAGE; 9588267a9baSMark Brown dcdc->desc.owner = THIS_MODULE; 9598267a9baSMark Brown 9608267a9baSMark Brown dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, 9618267a9baSMark Brown pdata->epe[id], dcdc); 9628267a9baSMark Brown if (IS_ERR(dcdc->regulator)) { 9638267a9baSMark Brown ret = PTR_ERR(dcdc->regulator); 9648267a9baSMark Brown dev_err(wm831x->dev, "Failed to register EPE%d: %d\n", 9658267a9baSMark Brown id + 1, ret); 9668267a9baSMark Brown goto err; 9678267a9baSMark Brown } 9688267a9baSMark Brown 9698267a9baSMark Brown platform_set_drvdata(pdev, dcdc); 9708267a9baSMark Brown 9718267a9baSMark Brown return 0; 9728267a9baSMark Brown 9738267a9baSMark Brown err: 9748267a9baSMark Brown kfree(dcdc); 9758267a9baSMark Brown return ret; 9768267a9baSMark Brown } 9778267a9baSMark Brown 9788267a9baSMark Brown static __devexit int wm831x_epe_remove(struct platform_device *pdev) 9798267a9baSMark Brown { 9808267a9baSMark Brown struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 9818267a9baSMark Brown 9828267a9baSMark Brown regulator_unregister(dcdc->regulator); 9838267a9baSMark Brown kfree(dcdc); 9848267a9baSMark Brown 9858267a9baSMark Brown return 0; 9868267a9baSMark Brown } 9878267a9baSMark Brown 9888267a9baSMark Brown static struct platform_driver wm831x_epe_driver = { 9898267a9baSMark Brown .probe = wm831x_epe_probe, 9908267a9baSMark Brown .remove = __devexit_p(wm831x_epe_remove), 9918267a9baSMark Brown .driver = { 9928267a9baSMark Brown .name = "wm831x-epe", 9938267a9baSMark Brown }, 9948267a9baSMark Brown }; 9958267a9baSMark Brown 996e4ee831fSMark Brown static int __init wm831x_dcdc_init(void) 997e4ee831fSMark Brown { 998e4ee831fSMark Brown int ret; 999e4ee831fSMark Brown ret = platform_driver_register(&wm831x_buckv_driver); 1000e4ee831fSMark Brown if (ret != 0) 1001e4ee831fSMark Brown pr_err("Failed to register WM831x BUCKV driver: %d\n", ret); 1002e4ee831fSMark Brown 1003e4ee831fSMark Brown ret = platform_driver_register(&wm831x_buckp_driver); 1004e4ee831fSMark Brown if (ret != 0) 1005e4ee831fSMark Brown pr_err("Failed to register WM831x BUCKP driver: %d\n", ret); 1006e4ee831fSMark Brown 10071304850dSMark Brown ret = platform_driver_register(&wm831x_boostp_driver); 10081304850dSMark Brown if (ret != 0) 10091304850dSMark Brown pr_err("Failed to register WM831x BOOST driver: %d\n", ret); 10101304850dSMark Brown 10118267a9baSMark Brown ret = platform_driver_register(&wm831x_epe_driver); 10128267a9baSMark Brown if (ret != 0) 10138267a9baSMark Brown pr_err("Failed to register WM831x EPE driver: %d\n", ret); 10148267a9baSMark Brown 1015e4ee831fSMark Brown return 0; 1016e4ee831fSMark Brown } 1017e4ee831fSMark Brown subsys_initcall(wm831x_dcdc_init); 1018e4ee831fSMark Brown 1019e4ee831fSMark Brown static void __exit wm831x_dcdc_exit(void) 1020e4ee831fSMark Brown { 10218267a9baSMark Brown platform_driver_unregister(&wm831x_epe_driver); 10221304850dSMark Brown platform_driver_unregister(&wm831x_boostp_driver); 1023e4ee831fSMark Brown platform_driver_unregister(&wm831x_buckp_driver); 1024e4ee831fSMark Brown platform_driver_unregister(&wm831x_buckv_driver); 1025e4ee831fSMark Brown } 1026e4ee831fSMark Brown module_exit(wm831x_dcdc_exit); 1027e4ee831fSMark Brown 1028e4ee831fSMark Brown /* Module information */ 1029e4ee831fSMark Brown MODULE_AUTHOR("Mark Brown"); 1030e4ee831fSMark Brown MODULE_DESCRIPTION("WM831x DC-DC convertor driver"); 1031e4ee831fSMark Brown MODULE_LICENSE("GPL"); 1032e4ee831fSMark Brown MODULE_ALIAS("platform:wm831x-buckv"); 1033e4ee831fSMark Brown MODULE_ALIAS("platform:wm831x-buckp"); 1034