Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 1 | /* |
| 2 | * wm831x-ldo.c -- LDO driver for the WM831x series |
| 3 | * |
| 4 | * Copyright 2009 Wolfson Microelectronics PLC. |
| 5 | * |
| 6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2 of the License, or (at your |
| 11 | * option) any later version. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/moduleparam.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/bitops.h> |
| 18 | #include <linux/err.h> |
| 19 | #include <linux/i2c.h> |
| 20 | #include <linux/platform_device.h> |
| 21 | #include <linux/regulator/driver.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 22 | #include <linux/slab.h> |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 23 | |
| 24 | #include <linux/mfd/wm831x/core.h> |
| 25 | #include <linux/mfd/wm831x/regulator.h> |
| 26 | #include <linux/mfd/wm831x/pdata.h> |
| 27 | |
Mark Brown | f1aba13 | 2012-03-28 21:40:20 +0100 | [diff] [blame] | 28 | #define WM831X_LDO_MAX_NAME 9 |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 29 | |
| 30 | #define WM831X_LDO_CONTROL 0 |
| 31 | #define WM831X_LDO_ON_CONTROL 1 |
| 32 | #define WM831X_LDO_SLEEP_CONTROL 2 |
| 33 | |
| 34 | #define WM831X_ALIVE_LDO_ON_CONTROL 0 |
| 35 | #define WM831X_ALIVE_LDO_SLEEP_CONTROL 1 |
| 36 | |
| 37 | struct wm831x_ldo { |
| 38 | char name[WM831X_LDO_MAX_NAME]; |
Mark Brown | f1aba13 | 2012-03-28 21:40:20 +0100 | [diff] [blame] | 39 | char supply_name[WM831X_LDO_MAX_NAME]; |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 40 | struct regulator_desc desc; |
| 41 | int base; |
| 42 | struct wm831x *wm831x; |
| 43 | struct regulator_dev *regulator; |
| 44 | }; |
| 45 | |
| 46 | /* |
| 47 | * Shared |
| 48 | */ |
| 49 | |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 50 | static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data) |
| 51 | { |
| 52 | struct wm831x_ldo *ldo = data; |
| 53 | |
| 54 | regulator_notifier_call_chain(ldo->regulator, |
| 55 | REGULATOR_EVENT_UNDER_VOLTAGE, |
| 56 | NULL); |
| 57 | |
| 58 | return IRQ_HANDLED; |
| 59 | } |
| 60 | |
| 61 | /* |
| 62 | * General purpose LDOs |
| 63 | */ |
| 64 | |
| 65 | #define WM831X_GP_LDO_SELECTOR_LOW 0xe |
| 66 | #define WM831X_GP_LDO_MAX_SELECTOR 0x1f |
| 67 | |
| 68 | static int wm831x_gp_ldo_list_voltage(struct regulator_dev *rdev, |
| 69 | unsigned int selector) |
| 70 | { |
| 71 | /* 0.9-1.6V in 50mV steps */ |
| 72 | if (selector <= WM831X_GP_LDO_SELECTOR_LOW) |
| 73 | return 900000 + (selector * 50000); |
Axel Lin | 6085d4d | 2012-03-29 15:04:22 +0800 | [diff] [blame] | 74 | /* 1.7-3.3V in 100mV steps */ |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 75 | if (selector <= WM831X_GP_LDO_MAX_SELECTOR) |
| 76 | return 1600000 + ((selector - WM831X_GP_LDO_SELECTOR_LOW) |
| 77 | * 100000); |
| 78 | return -EINVAL; |
| 79 | } |
| 80 | |
| 81 | static int wm831x_gp_ldo_set_voltage_int(struct regulator_dev *rdev, int reg, |
Mark Brown | 3a93f2a | 2010-11-10 14:38:29 +0000 | [diff] [blame] | 82 | int min_uV, int max_uV, |
| 83 | unsigned *selector) |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 84 | { |
| 85 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
| 86 | struct wm831x *wm831x = ldo->wm831x; |
| 87 | int vsel, ret; |
| 88 | |
| 89 | if (min_uV < 900000) |
| 90 | vsel = 0; |
| 91 | else if (min_uV < 1700000) |
| 92 | vsel = ((min_uV - 900000) / 50000); |
| 93 | else |
| 94 | vsel = ((min_uV - 1700000) / 100000) |
| 95 | + WM831X_GP_LDO_SELECTOR_LOW + 1; |
| 96 | |
| 97 | ret = wm831x_gp_ldo_list_voltage(rdev, vsel); |
| 98 | if (ret < 0) |
| 99 | return ret; |
| 100 | if (ret < min_uV || ret > max_uV) |
| 101 | return -EINVAL; |
| 102 | |
Mark Brown | 3a93f2a | 2010-11-10 14:38:29 +0000 | [diff] [blame] | 103 | *selector = vsel; |
| 104 | |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 105 | return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, vsel); |
| 106 | } |
| 107 | |
| 108 | static int wm831x_gp_ldo_set_voltage(struct regulator_dev *rdev, |
Mark Brown | 3a93f2a | 2010-11-10 14:38:29 +0000 | [diff] [blame] | 109 | int min_uV, int max_uV, |
| 110 | unsigned *selector) |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 111 | { |
| 112 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
| 113 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; |
| 114 | |
Mark Brown | 3a93f2a | 2010-11-10 14:38:29 +0000 | [diff] [blame] | 115 | return wm831x_gp_ldo_set_voltage_int(rdev, reg, min_uV, max_uV, |
| 116 | selector); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 117 | } |
| 118 | |
| 119 | static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev, |
| 120 | int uV) |
| 121 | { |
| 122 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
| 123 | int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; |
Mark Brown | 3a93f2a | 2010-11-10 14:38:29 +0000 | [diff] [blame] | 124 | unsigned int selector; |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 125 | |
Mark Brown | 3a93f2a | 2010-11-10 14:38:29 +0000 | [diff] [blame] | 126 | return wm831x_gp_ldo_set_voltage_int(rdev, reg, uV, uV, &selector); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 127 | } |
| 128 | |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 129 | static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev) |
| 130 | { |
| 131 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
| 132 | struct wm831x *wm831x = ldo->wm831x; |
| 133 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; |
| 134 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
Roel Kluin | 9a767d4 | 2009-10-16 14:16:15 +0200 | [diff] [blame] | 135 | int ret; |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 136 | |
| 137 | ret = wm831x_reg_read(wm831x, on_reg); |
| 138 | if (ret < 0) |
Roel Kluin | 9a767d4 | 2009-10-16 14:16:15 +0200 | [diff] [blame] | 139 | return ret; |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 140 | |
| 141 | if (!(ret & WM831X_LDO1_ON_MODE)) |
| 142 | return REGULATOR_MODE_NORMAL; |
| 143 | |
| 144 | ret = wm831x_reg_read(wm831x, ctrl_reg); |
| 145 | if (ret < 0) |
Roel Kluin | 9a767d4 | 2009-10-16 14:16:15 +0200 | [diff] [blame] | 146 | return ret; |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 147 | |
| 148 | if (ret & WM831X_LDO1_LP_MODE) |
| 149 | return REGULATOR_MODE_STANDBY; |
| 150 | else |
| 151 | return REGULATOR_MODE_IDLE; |
| 152 | } |
| 153 | |
| 154 | static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev, |
| 155 | unsigned int mode) |
| 156 | { |
| 157 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
| 158 | struct wm831x *wm831x = ldo->wm831x; |
| 159 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; |
| 160 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
| 161 | int ret; |
| 162 | |
| 163 | |
| 164 | switch (mode) { |
| 165 | case REGULATOR_MODE_NORMAL: |
| 166 | ret = wm831x_set_bits(wm831x, on_reg, |
| 167 | WM831X_LDO1_ON_MODE, 0); |
| 168 | if (ret < 0) |
| 169 | return ret; |
| 170 | break; |
| 171 | |
| 172 | case REGULATOR_MODE_IDLE: |
| 173 | ret = wm831x_set_bits(wm831x, ctrl_reg, |
Axel Lin | e260999 | 2010-09-06 16:48:13 +0800 | [diff] [blame] | 174 | WM831X_LDO1_LP_MODE, 0); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 175 | if (ret < 0) |
| 176 | return ret; |
| 177 | |
| 178 | ret = wm831x_set_bits(wm831x, on_reg, |
| 179 | WM831X_LDO1_ON_MODE, |
| 180 | WM831X_LDO1_ON_MODE); |
| 181 | if (ret < 0) |
| 182 | return ret; |
Axel Lin | e260999 | 2010-09-06 16:48:13 +0800 | [diff] [blame] | 183 | break; |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 184 | |
| 185 | case REGULATOR_MODE_STANDBY: |
| 186 | ret = wm831x_set_bits(wm831x, ctrl_reg, |
Axel Lin | e260999 | 2010-09-06 16:48:13 +0800 | [diff] [blame] | 187 | WM831X_LDO1_LP_MODE, |
| 188 | WM831X_LDO1_LP_MODE); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 189 | if (ret < 0) |
| 190 | return ret; |
| 191 | |
| 192 | ret = wm831x_set_bits(wm831x, on_reg, |
| 193 | WM831X_LDO1_ON_MODE, |
| 194 | WM831X_LDO1_ON_MODE); |
| 195 | if (ret < 0) |
| 196 | return ret; |
| 197 | break; |
| 198 | |
| 199 | default: |
| 200 | return -EINVAL; |
| 201 | } |
| 202 | |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev) |
| 207 | { |
| 208 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
| 209 | struct wm831x *wm831x = ldo->wm831x; |
| 210 | int mask = 1 << rdev_get_id(rdev); |
| 211 | int ret; |
| 212 | |
| 213 | /* Is the regulator on? */ |
| 214 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); |
| 215 | if (ret < 0) |
| 216 | return ret; |
| 217 | if (!(ret & mask)) |
| 218 | return REGULATOR_STATUS_OFF; |
| 219 | |
| 220 | /* Is it reporting under voltage? */ |
| 221 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); |
| 222 | if (ret & mask) |
| 223 | return REGULATOR_STATUS_ERROR; |
| 224 | |
| 225 | ret = wm831x_gp_ldo_get_mode(rdev); |
| 226 | if (ret < 0) |
| 227 | return ret; |
| 228 | else |
| 229 | return regulator_mode_to_status(ret); |
| 230 | } |
| 231 | |
| 232 | static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev, |
| 233 | int input_uV, |
| 234 | int output_uV, int load_uA) |
| 235 | { |
| 236 | if (load_uA < 20000) |
| 237 | return REGULATOR_MODE_STANDBY; |
| 238 | if (load_uA < 50000) |
| 239 | return REGULATOR_MODE_IDLE; |
| 240 | return REGULATOR_MODE_NORMAL; |
| 241 | } |
| 242 | |
| 243 | |
| 244 | static struct regulator_ops wm831x_gp_ldo_ops = { |
| 245 | .list_voltage = wm831x_gp_ldo_list_voltage, |
Mark Brown | ac663b4 | 2012-04-15 11:55:55 +0100 | [diff] [blame] | 246 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 247 | .set_voltage = wm831x_gp_ldo_set_voltage, |
| 248 | .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage, |
| 249 | .get_mode = wm831x_gp_ldo_get_mode, |
| 250 | .set_mode = wm831x_gp_ldo_set_mode, |
| 251 | .get_status = wm831x_gp_ldo_get_status, |
| 252 | .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode, |
| 253 | |
Mark Brown | ca8c361 | 2012-04-15 12:38:52 +0100 | [diff] [blame] | 254 | .is_enabled = regulator_is_enabled_regmap, |
| 255 | .enable = regulator_enable_regmap, |
| 256 | .disable = regulator_disable_regmap, |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 257 | }; |
| 258 | |
| 259 | static __devinit int wm831x_gp_ldo_probe(struct platform_device *pdev) |
| 260 | { |
| 261 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); |
| 262 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; |
Mark Brown | c172708 | 2012-04-04 00:50:22 +0100 | [diff] [blame] | 263 | struct regulator_config config = { }; |
Mark Brown | 137a635 | 2011-07-25 22:20:29 +0100 | [diff] [blame] | 264 | int id; |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 265 | struct wm831x_ldo *ldo; |
| 266 | struct resource *res; |
| 267 | int ret, irq; |
| 268 | |
Mark Brown | 137a635 | 2011-07-25 22:20:29 +0100 | [diff] [blame] | 269 | if (pdata && pdata->wm831x_num) |
| 270 | id = (pdata->wm831x_num * 10) + 1; |
| 271 | else |
| 272 | id = 0; |
| 273 | id = pdev->id - id; |
| 274 | |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 275 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
| 276 | |
Mark Brown | fded2f4 | 2011-12-15 02:11:14 +0800 | [diff] [blame] | 277 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 278 | if (ldo == NULL) { |
| 279 | dev_err(&pdev->dev, "Unable to allocate private data\n"); |
| 280 | return -ENOMEM; |
| 281 | } |
| 282 | |
| 283 | ldo->wm831x = wm831x; |
| 284 | |
| 285 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
| 286 | if (res == NULL) { |
| 287 | dev_err(&pdev->dev, "No I/O resource\n"); |
| 288 | ret = -EINVAL; |
| 289 | goto err; |
| 290 | } |
| 291 | ldo->base = res->start; |
| 292 | |
| 293 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); |
| 294 | ldo->desc.name = ldo->name; |
Mark Brown | f1aba13 | 2012-03-28 21:40:20 +0100 | [diff] [blame] | 295 | |
| 296 | snprintf(ldo->supply_name, sizeof(ldo->supply_name), |
| 297 | "LDO%dVDD", id + 1); |
| 298 | ldo->desc.supply_name = ldo->supply_name; |
| 299 | |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 300 | ldo->desc.id = id; |
| 301 | ldo->desc.type = REGULATOR_VOLTAGE; |
| 302 | ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1; |
| 303 | ldo->desc.ops = &wm831x_gp_ldo_ops; |
| 304 | ldo->desc.owner = THIS_MODULE; |
Mark Brown | ac663b4 | 2012-04-15 11:55:55 +0100 | [diff] [blame] | 305 | ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
| 306 | ldo->desc.vsel_mask = WM831X_LDO1_ON_VSEL_MASK; |
Mark Brown | ca8c361 | 2012-04-15 12:38:52 +0100 | [diff] [blame] | 307 | ldo->desc.enable_reg = WM831X_LDO_ENABLE; |
| 308 | ldo->desc.enable_mask = 1 << id; |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 309 | |
Mark Brown | c172708 | 2012-04-04 00:50:22 +0100 | [diff] [blame] | 310 | config.dev = pdev->dev.parent; |
Mark Brown | b7ca878 | 2012-05-10 00:41:02 +0100 | [diff] [blame] | 311 | if (pdata) |
| 312 | config.init_data = pdata->ldo[id]; |
Mark Brown | c172708 | 2012-04-04 00:50:22 +0100 | [diff] [blame] | 313 | config.driver_data = ldo; |
Mark Brown | ac663b4 | 2012-04-15 11:55:55 +0100 | [diff] [blame] | 314 | config.regmap = wm831x->regmap; |
Mark Brown | c172708 | 2012-04-04 00:50:22 +0100 | [diff] [blame] | 315 | |
| 316 | ldo->regulator = regulator_register(&ldo->desc, &config); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 317 | if (IS_ERR(ldo->regulator)) { |
| 318 | ret = PTR_ERR(ldo->regulator); |
| 319 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", |
| 320 | id + 1, ret); |
| 321 | goto err; |
| 322 | } |
| 323 | |
| 324 | irq = platform_get_irq_byname(pdev, "UV"); |
Mark Brown | dfda9c2 | 2011-03-01 16:50:43 +0000 | [diff] [blame] | 325 | ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq, |
| 326 | IRQF_TRIGGER_RISING, ldo->name, |
| 327 | ldo); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 328 | if (ret != 0) { |
| 329 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", |
| 330 | irq, ret); |
| 331 | goto err_regulator; |
| 332 | } |
| 333 | |
| 334 | platform_set_drvdata(pdev, ldo); |
| 335 | |
| 336 | return 0; |
| 337 | |
| 338 | err_regulator: |
| 339 | regulator_unregister(ldo->regulator); |
| 340 | err: |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 341 | return ret; |
| 342 | } |
| 343 | |
| 344 | static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev) |
| 345 | { |
| 346 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 347 | |
Dmitry Torokhov | eb66d56 | 2010-02-23 23:38:39 -0800 | [diff] [blame] | 348 | platform_set_drvdata(pdev, NULL); |
| 349 | |
Mark Brown | dfda9c2 | 2011-03-01 16:50:43 +0000 | [diff] [blame] | 350 | free_irq(platform_get_irq_byname(pdev, "UV"), ldo); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 351 | regulator_unregister(ldo->regulator); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 352 | |
| 353 | return 0; |
| 354 | } |
| 355 | |
| 356 | static struct platform_driver wm831x_gp_ldo_driver = { |
| 357 | .probe = wm831x_gp_ldo_probe, |
| 358 | .remove = __devexit_p(wm831x_gp_ldo_remove), |
| 359 | .driver = { |
| 360 | .name = "wm831x-ldo", |
Dmitry Torokhov | eb66d56 | 2010-02-23 23:38:39 -0800 | [diff] [blame] | 361 | .owner = THIS_MODULE, |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 362 | }, |
| 363 | }; |
| 364 | |
| 365 | /* |
| 366 | * Analogue LDOs |
| 367 | */ |
| 368 | |
| 369 | |
| 370 | #define WM831X_ALDO_SELECTOR_LOW 0xc |
| 371 | #define WM831X_ALDO_MAX_SELECTOR 0x1f |
| 372 | |
| 373 | static int wm831x_aldo_list_voltage(struct regulator_dev *rdev, |
| 374 | unsigned int selector) |
| 375 | { |
| 376 | /* 1-1.6V in 50mV steps */ |
| 377 | if (selector <= WM831X_ALDO_SELECTOR_LOW) |
| 378 | return 1000000 + (selector * 50000); |
Axel Lin | 6085d4d | 2012-03-29 15:04:22 +0800 | [diff] [blame] | 379 | /* 1.7-3.5V in 100mV steps */ |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 380 | if (selector <= WM831X_ALDO_MAX_SELECTOR) |
| 381 | return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW) |
| 382 | * 100000); |
| 383 | return -EINVAL; |
| 384 | } |
| 385 | |
| 386 | static int wm831x_aldo_set_voltage_int(struct regulator_dev *rdev, int reg, |
Mark Brown | 3a93f2a | 2010-11-10 14:38:29 +0000 | [diff] [blame] | 387 | int min_uV, int max_uV, |
| 388 | unsigned *selector) |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 389 | { |
| 390 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
| 391 | struct wm831x *wm831x = ldo->wm831x; |
| 392 | int vsel, ret; |
| 393 | |
| 394 | if (min_uV < 1000000) |
| 395 | vsel = 0; |
| 396 | else if (min_uV < 1700000) |
| 397 | vsel = ((min_uV - 1000000) / 50000); |
| 398 | else |
| 399 | vsel = ((min_uV - 1700000) / 100000) |
| 400 | + WM831X_ALDO_SELECTOR_LOW + 1; |
| 401 | |
| 402 | ret = wm831x_aldo_list_voltage(rdev, vsel); |
| 403 | if (ret < 0) |
| 404 | return ret; |
| 405 | if (ret < min_uV || ret > max_uV) |
| 406 | return -EINVAL; |
| 407 | |
Mark Brown | 3a93f2a | 2010-11-10 14:38:29 +0000 | [diff] [blame] | 408 | *selector = vsel; |
| 409 | |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 410 | return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, vsel); |
| 411 | } |
| 412 | |
| 413 | static int wm831x_aldo_set_voltage(struct regulator_dev *rdev, |
Mark Brown | 3a93f2a | 2010-11-10 14:38:29 +0000 | [diff] [blame] | 414 | int min_uV, int max_uV, unsigned *selector) |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 415 | { |
| 416 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
| 417 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; |
| 418 | |
Mark Brown | 3a93f2a | 2010-11-10 14:38:29 +0000 | [diff] [blame] | 419 | return wm831x_aldo_set_voltage_int(rdev, reg, min_uV, max_uV, |
| 420 | selector); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 421 | } |
| 422 | |
| 423 | static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev, |
| 424 | int uV) |
| 425 | { |
| 426 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
| 427 | int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; |
Mark Brown | 3a93f2a | 2010-11-10 14:38:29 +0000 | [diff] [blame] | 428 | unsigned int selector; |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 429 | |
Mark Brown | 3a93f2a | 2010-11-10 14:38:29 +0000 | [diff] [blame] | 430 | return wm831x_aldo_set_voltage_int(rdev, reg, uV, uV, &selector); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 431 | } |
| 432 | |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 433 | static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev) |
| 434 | { |
| 435 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
| 436 | struct wm831x *wm831x = ldo->wm831x; |
| 437 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
Roel Kluin | 6f17c65 | 2009-12-15 20:07:31 +0100 | [diff] [blame] | 438 | int ret; |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 439 | |
| 440 | ret = wm831x_reg_read(wm831x, on_reg); |
| 441 | if (ret < 0) |
| 442 | return 0; |
| 443 | |
| 444 | if (ret & WM831X_LDO7_ON_MODE) |
| 445 | return REGULATOR_MODE_IDLE; |
| 446 | else |
| 447 | return REGULATOR_MODE_NORMAL; |
| 448 | } |
| 449 | |
| 450 | static int wm831x_aldo_set_mode(struct regulator_dev *rdev, |
| 451 | unsigned int mode) |
| 452 | { |
| 453 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
| 454 | struct wm831x *wm831x = ldo->wm831x; |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 455 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
| 456 | int ret; |
| 457 | |
| 458 | |
| 459 | switch (mode) { |
| 460 | case REGULATOR_MODE_NORMAL: |
Axel Lin | e841a36 | 2012-03-29 15:02:55 +0800 | [diff] [blame] | 461 | ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, 0); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 462 | if (ret < 0) |
| 463 | return ret; |
| 464 | break; |
| 465 | |
| 466 | case REGULATOR_MODE_IDLE: |
Axel Lin | e841a36 | 2012-03-29 15:02:55 +0800 | [diff] [blame] | 467 | ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 468 | WM831X_LDO7_ON_MODE); |
| 469 | if (ret < 0) |
| 470 | return ret; |
| 471 | break; |
| 472 | |
| 473 | default: |
| 474 | return -EINVAL; |
| 475 | } |
| 476 | |
| 477 | return 0; |
| 478 | } |
| 479 | |
| 480 | static int wm831x_aldo_get_status(struct regulator_dev *rdev) |
| 481 | { |
| 482 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
| 483 | struct wm831x *wm831x = ldo->wm831x; |
| 484 | int mask = 1 << rdev_get_id(rdev); |
| 485 | int ret; |
| 486 | |
| 487 | /* Is the regulator on? */ |
| 488 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); |
| 489 | if (ret < 0) |
| 490 | return ret; |
| 491 | if (!(ret & mask)) |
| 492 | return REGULATOR_STATUS_OFF; |
| 493 | |
| 494 | /* Is it reporting under voltage? */ |
| 495 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); |
| 496 | if (ret & mask) |
| 497 | return REGULATOR_STATUS_ERROR; |
| 498 | |
| 499 | ret = wm831x_aldo_get_mode(rdev); |
| 500 | if (ret < 0) |
| 501 | return ret; |
| 502 | else |
| 503 | return regulator_mode_to_status(ret); |
| 504 | } |
| 505 | |
| 506 | static struct regulator_ops wm831x_aldo_ops = { |
| 507 | .list_voltage = wm831x_aldo_list_voltage, |
Mark Brown | ac663b4 | 2012-04-15 11:55:55 +0100 | [diff] [blame] | 508 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 509 | .set_voltage = wm831x_aldo_set_voltage, |
| 510 | .set_suspend_voltage = wm831x_aldo_set_suspend_voltage, |
| 511 | .get_mode = wm831x_aldo_get_mode, |
| 512 | .set_mode = wm831x_aldo_set_mode, |
| 513 | .get_status = wm831x_aldo_get_status, |
| 514 | |
Mark Brown | ca8c361 | 2012-04-15 12:38:52 +0100 | [diff] [blame] | 515 | .is_enabled = regulator_is_enabled_regmap, |
| 516 | .enable = regulator_enable_regmap, |
| 517 | .disable = regulator_disable_regmap, |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 518 | }; |
| 519 | |
| 520 | static __devinit int wm831x_aldo_probe(struct platform_device *pdev) |
| 521 | { |
| 522 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); |
| 523 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; |
Mark Brown | c172708 | 2012-04-04 00:50:22 +0100 | [diff] [blame] | 524 | struct regulator_config config = { }; |
Mark Brown | 137a635 | 2011-07-25 22:20:29 +0100 | [diff] [blame] | 525 | int id; |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 526 | struct wm831x_ldo *ldo; |
| 527 | struct resource *res; |
| 528 | int ret, irq; |
| 529 | |
Mark Brown | 137a635 | 2011-07-25 22:20:29 +0100 | [diff] [blame] | 530 | if (pdata && pdata->wm831x_num) |
| 531 | id = (pdata->wm831x_num * 10) + 1; |
| 532 | else |
| 533 | id = 0; |
| 534 | id = pdev->id - id; |
| 535 | |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 536 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
| 537 | |
Mark Brown | fded2f4 | 2011-12-15 02:11:14 +0800 | [diff] [blame] | 538 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 539 | if (ldo == NULL) { |
| 540 | dev_err(&pdev->dev, "Unable to allocate private data\n"); |
| 541 | return -ENOMEM; |
| 542 | } |
| 543 | |
| 544 | ldo->wm831x = wm831x; |
| 545 | |
| 546 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
| 547 | if (res == NULL) { |
| 548 | dev_err(&pdev->dev, "No I/O resource\n"); |
| 549 | ret = -EINVAL; |
| 550 | goto err; |
| 551 | } |
| 552 | ldo->base = res->start; |
| 553 | |
| 554 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); |
| 555 | ldo->desc.name = ldo->name; |
Mark Brown | f1aba13 | 2012-03-28 21:40:20 +0100 | [diff] [blame] | 556 | |
| 557 | snprintf(ldo->supply_name, sizeof(ldo->supply_name), |
| 558 | "LDO%dVDD", id + 1); |
| 559 | ldo->desc.supply_name = ldo->supply_name; |
| 560 | |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 561 | ldo->desc.id = id; |
| 562 | ldo->desc.type = REGULATOR_VOLTAGE; |
| 563 | ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1; |
| 564 | ldo->desc.ops = &wm831x_aldo_ops; |
| 565 | ldo->desc.owner = THIS_MODULE; |
Mark Brown | ac663b4 | 2012-04-15 11:55:55 +0100 | [diff] [blame] | 566 | ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
| 567 | ldo->desc.vsel_mask = WM831X_LDO7_ON_VSEL_MASK; |
Mark Brown | ca8c361 | 2012-04-15 12:38:52 +0100 | [diff] [blame] | 568 | ldo->desc.enable_reg = WM831X_LDO_ENABLE; |
| 569 | ldo->desc.enable_mask = 1 << id; |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 570 | |
Mark Brown | c172708 | 2012-04-04 00:50:22 +0100 | [diff] [blame] | 571 | config.dev = pdev->dev.parent; |
Mark Brown | b7ca878 | 2012-05-10 00:41:02 +0100 | [diff] [blame] | 572 | if (pdata) |
| 573 | config.init_data = pdata->ldo[id]; |
Mark Brown | c172708 | 2012-04-04 00:50:22 +0100 | [diff] [blame] | 574 | config.driver_data = ldo; |
Mark Brown | ac663b4 | 2012-04-15 11:55:55 +0100 | [diff] [blame] | 575 | config.regmap = wm831x->regmap; |
Mark Brown | c172708 | 2012-04-04 00:50:22 +0100 | [diff] [blame] | 576 | |
| 577 | ldo->regulator = regulator_register(&ldo->desc, &config); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 578 | if (IS_ERR(ldo->regulator)) { |
| 579 | ret = PTR_ERR(ldo->regulator); |
| 580 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", |
| 581 | id + 1, ret); |
| 582 | goto err; |
| 583 | } |
| 584 | |
| 585 | irq = platform_get_irq_byname(pdev, "UV"); |
Mark Brown | dfda9c2 | 2011-03-01 16:50:43 +0000 | [diff] [blame] | 586 | ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq, |
| 587 | IRQF_TRIGGER_RISING, ldo->name, ldo); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 588 | if (ret != 0) { |
| 589 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", |
| 590 | irq, ret); |
| 591 | goto err_regulator; |
| 592 | } |
| 593 | |
| 594 | platform_set_drvdata(pdev, ldo); |
| 595 | |
| 596 | return 0; |
| 597 | |
| 598 | err_regulator: |
| 599 | regulator_unregister(ldo->regulator); |
| 600 | err: |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 601 | return ret; |
| 602 | } |
| 603 | |
| 604 | static __devexit int wm831x_aldo_remove(struct platform_device *pdev) |
| 605 | { |
| 606 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 607 | |
Mark Brown | dfda9c2 | 2011-03-01 16:50:43 +0000 | [diff] [blame] | 608 | free_irq(platform_get_irq_byname(pdev, "UV"), ldo); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 609 | regulator_unregister(ldo->regulator); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 610 | |
| 611 | return 0; |
| 612 | } |
| 613 | |
| 614 | static struct platform_driver wm831x_aldo_driver = { |
| 615 | .probe = wm831x_aldo_probe, |
| 616 | .remove = __devexit_p(wm831x_aldo_remove), |
| 617 | .driver = { |
| 618 | .name = "wm831x-aldo", |
Dmitry Torokhov | eb66d56 | 2010-02-23 23:38:39 -0800 | [diff] [blame] | 619 | .owner = THIS_MODULE, |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 620 | }, |
| 621 | }; |
| 622 | |
| 623 | /* |
| 624 | * Alive LDO |
| 625 | */ |
| 626 | |
| 627 | #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf |
| 628 | |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 629 | static int wm831x_alive_ldo_set_voltage_int(struct regulator_dev *rdev, |
| 630 | int reg, |
Mark Brown | 3a93f2a | 2010-11-10 14:38:29 +0000 | [diff] [blame] | 631 | int min_uV, int max_uV, |
| 632 | unsigned *selector) |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 633 | { |
| 634 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
| 635 | struct wm831x *wm831x = ldo->wm831x; |
| 636 | int vsel, ret; |
| 637 | |
| 638 | vsel = (min_uV - 800000) / 50000; |
| 639 | |
Mark Brown | d31e954 | 2012-05-09 21:53:32 +0100 | [diff] [blame^] | 640 | ret = regulator_list_voltage_linear(rdev, vsel); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 641 | if (ret < 0) |
| 642 | return ret; |
| 643 | if (ret < min_uV || ret > max_uV) |
| 644 | return -EINVAL; |
| 645 | |
Mark Brown | 3a93f2a | 2010-11-10 14:38:29 +0000 | [diff] [blame] | 646 | *selector = vsel; |
| 647 | |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 648 | return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, vsel); |
| 649 | } |
| 650 | |
| 651 | static int wm831x_alive_ldo_set_voltage(struct regulator_dev *rdev, |
Mark Brown | 3a93f2a | 2010-11-10 14:38:29 +0000 | [diff] [blame] | 652 | int min_uV, int max_uV, |
| 653 | unsigned *selector) |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 654 | { |
| 655 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
| 656 | int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; |
| 657 | |
Mark Brown | 3a93f2a | 2010-11-10 14:38:29 +0000 | [diff] [blame] | 658 | return wm831x_alive_ldo_set_voltage_int(rdev, reg, min_uV, max_uV, |
| 659 | selector); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 660 | } |
| 661 | |
| 662 | static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev, |
| 663 | int uV) |
| 664 | { |
| 665 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
| 666 | int reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL; |
Mark Brown | 3a93f2a | 2010-11-10 14:38:29 +0000 | [diff] [blame] | 667 | unsigned selector; |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 668 | |
Mark Brown | 3a93f2a | 2010-11-10 14:38:29 +0000 | [diff] [blame] | 669 | return wm831x_alive_ldo_set_voltage_int(rdev, reg, uV, uV, &selector); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 670 | } |
| 671 | |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 672 | static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev) |
| 673 | { |
| 674 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
| 675 | struct wm831x *wm831x = ldo->wm831x; |
| 676 | int mask = 1 << rdev_get_id(rdev); |
| 677 | int ret; |
| 678 | |
| 679 | /* Is the regulator on? */ |
| 680 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); |
| 681 | if (ret < 0) |
| 682 | return ret; |
| 683 | if (ret & mask) |
| 684 | return REGULATOR_STATUS_ON; |
| 685 | else |
| 686 | return REGULATOR_STATUS_OFF; |
| 687 | } |
| 688 | |
| 689 | static struct regulator_ops wm831x_alive_ldo_ops = { |
Mark Brown | d31e954 | 2012-05-09 21:53:32 +0100 | [diff] [blame^] | 690 | .list_voltage = regulator_list_voltage_linear, |
Mark Brown | ac663b4 | 2012-04-15 11:55:55 +0100 | [diff] [blame] | 691 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 692 | .set_voltage = wm831x_alive_ldo_set_voltage, |
| 693 | .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage, |
| 694 | .get_status = wm831x_alive_ldo_get_status, |
| 695 | |
Mark Brown | ca8c361 | 2012-04-15 12:38:52 +0100 | [diff] [blame] | 696 | .is_enabled = regulator_is_enabled_regmap, |
| 697 | .enable = regulator_enable_regmap, |
| 698 | .disable = regulator_disable_regmap, |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 699 | }; |
| 700 | |
| 701 | static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev) |
| 702 | { |
| 703 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); |
| 704 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; |
Mark Brown | c172708 | 2012-04-04 00:50:22 +0100 | [diff] [blame] | 705 | struct regulator_config config = { }; |
Mark Brown | 137a635 | 2011-07-25 22:20:29 +0100 | [diff] [blame] | 706 | int id; |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 707 | struct wm831x_ldo *ldo; |
| 708 | struct resource *res; |
| 709 | int ret; |
| 710 | |
Mark Brown | 137a635 | 2011-07-25 22:20:29 +0100 | [diff] [blame] | 711 | if (pdata && pdata->wm831x_num) |
| 712 | id = (pdata->wm831x_num * 10) + 1; |
| 713 | else |
| 714 | id = 0; |
| 715 | id = pdev->id - id; |
| 716 | |
| 717 | |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 718 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
| 719 | |
Mark Brown | fded2f4 | 2011-12-15 02:11:14 +0800 | [diff] [blame] | 720 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 721 | if (ldo == NULL) { |
| 722 | dev_err(&pdev->dev, "Unable to allocate private data\n"); |
| 723 | return -ENOMEM; |
| 724 | } |
| 725 | |
| 726 | ldo->wm831x = wm831x; |
| 727 | |
| 728 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
| 729 | if (res == NULL) { |
| 730 | dev_err(&pdev->dev, "No I/O resource\n"); |
| 731 | ret = -EINVAL; |
| 732 | goto err; |
| 733 | } |
| 734 | ldo->base = res->start; |
| 735 | |
| 736 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); |
| 737 | ldo->desc.name = ldo->name; |
Mark Brown | f1aba13 | 2012-03-28 21:40:20 +0100 | [diff] [blame] | 738 | |
| 739 | snprintf(ldo->supply_name, sizeof(ldo->supply_name), |
| 740 | "LDO%dVDD", id + 1); |
| 741 | ldo->desc.supply_name = ldo->supply_name; |
| 742 | |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 743 | ldo->desc.id = id; |
| 744 | ldo->desc.type = REGULATOR_VOLTAGE; |
| 745 | ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1; |
| 746 | ldo->desc.ops = &wm831x_alive_ldo_ops; |
| 747 | ldo->desc.owner = THIS_MODULE; |
Mark Brown | ac663b4 | 2012-04-15 11:55:55 +0100 | [diff] [blame] | 748 | ldo->desc.vsel_reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; |
| 749 | ldo->desc.vsel_mask = WM831X_LDO11_ON_VSEL_MASK; |
Mark Brown | ca8c361 | 2012-04-15 12:38:52 +0100 | [diff] [blame] | 750 | ldo->desc.enable_reg = WM831X_LDO_ENABLE; |
| 751 | ldo->desc.enable_mask = 1 << id; |
Mark Brown | d31e954 | 2012-05-09 21:53:32 +0100 | [diff] [blame^] | 752 | ldo->desc.min_uV = 800000; |
| 753 | ldo->desc.uV_step = 50000; |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 754 | |
Mark Brown | c172708 | 2012-04-04 00:50:22 +0100 | [diff] [blame] | 755 | config.dev = pdev->dev.parent; |
Mark Brown | b7ca878 | 2012-05-10 00:41:02 +0100 | [diff] [blame] | 756 | if (pdata) |
| 757 | config.init_data = pdata->ldo[id]; |
Mark Brown | c172708 | 2012-04-04 00:50:22 +0100 | [diff] [blame] | 758 | config.driver_data = ldo; |
Mark Brown | ac663b4 | 2012-04-15 11:55:55 +0100 | [diff] [blame] | 759 | config.regmap = wm831x->regmap; |
Mark Brown | c172708 | 2012-04-04 00:50:22 +0100 | [diff] [blame] | 760 | |
| 761 | ldo->regulator = regulator_register(&ldo->desc, &config); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 762 | if (IS_ERR(ldo->regulator)) { |
| 763 | ret = PTR_ERR(ldo->regulator); |
| 764 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", |
| 765 | id + 1, ret); |
| 766 | goto err; |
| 767 | } |
| 768 | |
| 769 | platform_set_drvdata(pdev, ldo); |
| 770 | |
| 771 | return 0; |
| 772 | |
| 773 | err: |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 774 | return ret; |
| 775 | } |
| 776 | |
| 777 | static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev) |
| 778 | { |
| 779 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); |
| 780 | |
| 781 | regulator_unregister(ldo->regulator); |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 782 | |
| 783 | return 0; |
| 784 | } |
| 785 | |
| 786 | static struct platform_driver wm831x_alive_ldo_driver = { |
| 787 | .probe = wm831x_alive_ldo_probe, |
| 788 | .remove = __devexit_p(wm831x_alive_ldo_remove), |
| 789 | .driver = { |
| 790 | .name = "wm831x-alive-ldo", |
Dmitry Torokhov | eb66d56 | 2010-02-23 23:38:39 -0800 | [diff] [blame] | 791 | .owner = THIS_MODULE, |
Mark Brown | d1c6b4f | 2009-07-28 15:22:02 +0100 | [diff] [blame] | 792 | }, |
| 793 | }; |
| 794 | |
| 795 | static int __init wm831x_ldo_init(void) |
| 796 | { |
| 797 | int ret; |
| 798 | |
| 799 | ret = platform_driver_register(&wm831x_gp_ldo_driver); |
| 800 | if (ret != 0) |
| 801 | pr_err("Failed to register WM831x GP LDO driver: %d\n", ret); |
| 802 | |
| 803 | ret = platform_driver_register(&wm831x_aldo_driver); |
| 804 | if (ret != 0) |
| 805 | pr_err("Failed to register WM831x ALDO driver: %d\n", ret); |
| 806 | |
| 807 | ret = platform_driver_register(&wm831x_alive_ldo_driver); |
| 808 | if (ret != 0) |
| 809 | pr_err("Failed to register WM831x alive LDO driver: %d\n", |
| 810 | ret); |
| 811 | |
| 812 | return 0; |
| 813 | } |
| 814 | subsys_initcall(wm831x_ldo_init); |
| 815 | |
| 816 | static void __exit wm831x_ldo_exit(void) |
| 817 | { |
| 818 | platform_driver_unregister(&wm831x_alive_ldo_driver); |
| 819 | platform_driver_unregister(&wm831x_aldo_driver); |
| 820 | platform_driver_unregister(&wm831x_gp_ldo_driver); |
| 821 | } |
| 822 | module_exit(wm831x_ldo_exit); |
| 823 | |
| 824 | /* Module information */ |
| 825 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); |
| 826 | MODULE_DESCRIPTION("WM831x LDO driver"); |
| 827 | MODULE_LICENSE("GPL"); |
| 828 | MODULE_ALIAS("platform:wm831x-ldo"); |
| 829 | MODULE_ALIAS("platform:wm831x-aldo"); |
| 830 | MODULE_ALIAS("platform:wm831x-aliveldo"); |