git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| d1c6b4fe MB |
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> | |
| 22 | ||
| 23 | #include <linux/mfd/wm831x/core.h> | |
| 24 | #include <linux/mfd/wm831x/regulator.h> | |
| 25 | #include <linux/mfd/wm831x/pdata.h> | |
| 26 | ||
| 27 | #define WM831X_LDO_MAX_NAME 6 | |
| 28 | ||
| 29 | #define WM831X_LDO_CONTROL 0 | |
| 30 | #define WM831X_LDO_ON_CONTROL 1 | |
| 31 | #define WM831X_LDO_SLEEP_CONTROL 2 | |
| 32 | ||
| 33 | #define WM831X_ALIVE_LDO_ON_CONTROL 0 | |
| 34 | #define WM831X_ALIVE_LDO_SLEEP_CONTROL 1 | |
| 35 | ||
| 36 | struct wm831x_ldo { | |
| 37 | char name[WM831X_LDO_MAX_NAME]; | |
| 38 | struct regulator_desc desc; | |
| 39 | int base; | |
| 40 | struct wm831x *wm831x; | |
| 41 | struct regulator_dev *regulator; | |
| 42 | }; | |
| 43 | ||
| 44 | /* | |
| 45 | * Shared | |
| 46 | */ | |
| 47 | ||
| 48 | static int wm831x_ldo_is_enabled(struct regulator_dev *rdev) | |
| 49 | { | |
| 50 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 51 | struct wm831x *wm831x = ldo->wm831x; | |
| 52 | int mask = 1 << rdev_get_id(rdev); | |
| 53 | int reg; | |
| 54 | ||
| 55 | reg = wm831x_reg_read(wm831x, WM831X_LDO_ENABLE); | |
| 56 | if (reg < 0) | |
| 57 | return reg; | |
| 58 | ||
| 59 | if (reg & mask) | |
| 60 | return 1; | |
| 61 | else | |
| 62 | return 0; | |
| 63 | } | |
| 64 | ||
| 65 | static int wm831x_ldo_enable(struct regulator_dev *rdev) | |
| 66 | { | |
| 67 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 68 | struct wm831x *wm831x = ldo->wm831x; | |
| 69 | int mask = 1 << rdev_get_id(rdev); | |
| 70 | ||
| 71 | return wm831x_set_bits(wm831x, WM831X_LDO_ENABLE, mask, mask); | |
| 72 | } | |
| 73 | ||
| 74 | static int wm831x_ldo_disable(struct regulator_dev *rdev) | |
| 75 | { | |
| 76 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 77 | struct wm831x *wm831x = ldo->wm831x; | |
| 78 | int mask = 1 << rdev_get_id(rdev); | |
| 79 | ||
| 80 | return wm831x_set_bits(wm831x, WM831X_LDO_ENABLE, mask, 0); | |
| 81 | } | |
| 82 | ||
| 83 | static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data) | |
| 84 | { | |
| 85 | struct wm831x_ldo *ldo = data; | |
| 86 | ||
| 87 | regulator_notifier_call_chain(ldo->regulator, | |
| 88 | REGULATOR_EVENT_UNDER_VOLTAGE, | |
| 89 | NULL); | |
| 90 | ||
| 91 | return IRQ_HANDLED; | |
| 92 | } | |
| 93 | ||
| 94 | /* | |
| 95 | * General purpose LDOs | |
| 96 | */ | |
| 97 | ||
| 98 | #define WM831X_GP_LDO_SELECTOR_LOW 0xe | |
| 99 | #define WM831X_GP_LDO_MAX_SELECTOR 0x1f | |
| 100 | ||
| 101 | static int wm831x_gp_ldo_list_voltage(struct regulator_dev *rdev, | |
| 102 | unsigned int selector) | |
| 103 | { | |
| 104 | /* 0.9-1.6V in 50mV steps */ | |
| 105 | if (selector <= WM831X_GP_LDO_SELECTOR_LOW) | |
| 106 | return 900000 + (selector * 50000); | |
| 107 | /* 1.7-3.3V in 50mV steps */ | |
| 108 | if (selector <= WM831X_GP_LDO_MAX_SELECTOR) | |
| 109 | return 1600000 + ((selector - WM831X_GP_LDO_SELECTOR_LOW) | |
| 110 | * 100000); | |
| 111 | return -EINVAL; | |
| 112 | } | |
| 113 | ||
| 114 | static int wm831x_gp_ldo_set_voltage_int(struct regulator_dev *rdev, int reg, | |
| 115 | int min_uV, int max_uV) | |
| 116 | { | |
| 117 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 118 | struct wm831x *wm831x = ldo->wm831x; | |
| 119 | int vsel, ret; | |
| 120 | ||
| 121 | if (min_uV < 900000) | |
| 122 | vsel = 0; | |
| 123 | else if (min_uV < 1700000) | |
| 124 | vsel = ((min_uV - 900000) / 50000); | |
| 125 | else | |
| 126 | vsel = ((min_uV - 1700000) / 100000) | |
| 127 | + WM831X_GP_LDO_SELECTOR_LOW + 1; | |
| 128 | ||
| 129 | ret = wm831x_gp_ldo_list_voltage(rdev, vsel); | |
| 130 | if (ret < 0) | |
| 131 | return ret; | |
| 132 | if (ret < min_uV || ret > max_uV) | |
| 133 | return -EINVAL; | |
| 134 | ||
| 135 | return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, vsel); | |
| 136 | } | |
| 137 | ||
| 138 | static int wm831x_gp_ldo_set_voltage(struct regulator_dev *rdev, | |
| 139 | int min_uV, int max_uV) | |
| 140 | { | |
| 141 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 142 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
| 143 | ||
| 144 | return wm831x_gp_ldo_set_voltage_int(rdev, reg, min_uV, max_uV); | |
| 145 | } | |
| 146 | ||
| 147 | static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev, | |
| 148 | int uV) | |
| 149 | { | |
| 150 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 151 | int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; | |
| 152 | ||
| 153 | return wm831x_gp_ldo_set_voltage_int(rdev, reg, uV, uV); | |
| 154 | } | |
| 155 | ||
| 156 | static int wm831x_gp_ldo_get_voltage(struct regulator_dev *rdev) | |
| 157 | { | |
| 158 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 159 | struct wm831x *wm831x = ldo->wm831x; | |
| 160 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
| 161 | int ret; | |
| 162 | ||
| 163 | ret = wm831x_reg_read(wm831x, reg); | |
| 164 | if (ret < 0) | |
| 165 | return ret; | |
| 166 | ||
| 167 | ret &= WM831X_LDO1_ON_VSEL_MASK; | |
| 168 | ||
| 169 | return wm831x_gp_ldo_list_voltage(rdev, ret); | |
| 170 | } | |
| 171 | ||
| 172 | static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev) | |
| 173 | { | |
| 174 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 175 | struct wm831x *wm831x = ldo->wm831x; | |
| 176 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
| 177 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
| 9a767d43 | 178 | int ret; |
| d1c6b4fe MB |
179 | |
| 180 | ret = wm831x_reg_read(wm831x, on_reg); | |
| 181 | if (ret < 0) | |
| 9a767d43 | 182 | return ret; |
| d1c6b4fe MB |
183 | |
| 184 | if (!(ret & WM831X_LDO1_ON_MODE)) | |
| 185 | return REGULATOR_MODE_NORMAL; | |
| 186 | ||
| 187 | ret = wm831x_reg_read(wm831x, ctrl_reg); | |
| 188 | if (ret < 0) | |
| 9a767d43 | 189 | return ret; |
| d1c6b4fe MB |
190 | |
| 191 | if (ret & WM831X_LDO1_LP_MODE) | |
| 192 | return REGULATOR_MODE_STANDBY; | |
| 193 | else | |
| 194 | return REGULATOR_MODE_IDLE; | |
| 195 | } | |
| 196 | ||
| 197 | static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev, | |
| 198 | unsigned int mode) | |
| 199 | { | |
| 200 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 201 | struct wm831x *wm831x = ldo->wm831x; | |
| 202 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
| 203 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
| 204 | int ret; | |
| 205 | ||
| 206 | ||
| 207 | switch (mode) { | |
| 208 | case REGULATOR_MODE_NORMAL: | |
| 209 | ret = wm831x_set_bits(wm831x, on_reg, | |
| 210 | WM831X_LDO1_ON_MODE, 0); | |
| 211 | if (ret < 0) | |
| 212 | return ret; | |
| 213 | break; | |
| 214 | ||
| 215 | case REGULATOR_MODE_IDLE: | |
| 216 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
| 217 | WM831X_LDO1_LP_MODE, | |
| 218 | WM831X_LDO1_LP_MODE); | |
| 219 | if (ret < 0) | |
| 220 | return ret; | |
| 221 | ||
| 222 | ret = wm831x_set_bits(wm831x, on_reg, | |
| 223 | WM831X_LDO1_ON_MODE, | |
| 224 | WM831X_LDO1_ON_MODE); | |
| 225 | if (ret < 0) | |
| 226 | return ret; | |
| 227 | ||
| 228 | case REGULATOR_MODE_STANDBY: | |
| 229 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
| 230 | WM831X_LDO1_LP_MODE, 0); | |
| 231 | if (ret < 0) | |
| 232 | return ret; | |
| 233 | ||
| 234 | ret = wm831x_set_bits(wm831x, on_reg, | |
| 235 | WM831X_LDO1_ON_MODE, | |
| 236 | WM831X_LDO1_ON_MODE); | |
| 237 | if (ret < 0) | |
| 238 | return ret; | |
| 239 | break; | |
| 240 | ||
| 241 | default: | |
| 242 | return -EINVAL; | |
| 243 | } | |
| 244 | ||
| 245 | return 0; | |
| 246 | } | |
| 247 | ||
| 248 | static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev) | |
| 249 | { | |
| 250 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 251 | struct wm831x *wm831x = ldo->wm831x; | |
| 252 | int mask = 1 << rdev_get_id(rdev); | |
| 253 | int ret; | |
| 254 | ||
| 255 | /* Is the regulator on? */ | |
| 256 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
| 257 | if (ret < 0) | |
| 258 | return ret; | |
| 259 | if (!(ret & mask)) | |
| 260 | return REGULATOR_STATUS_OFF; | |
| 261 | ||
| 262 | /* Is it reporting under voltage? */ | |
| 263 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); | |
| 264 | if (ret & mask) | |
| 265 | return REGULATOR_STATUS_ERROR; | |
| 266 | ||
| 267 | ret = wm831x_gp_ldo_get_mode(rdev); | |
| 268 | if (ret < 0) | |
| 269 | return ret; | |
| 270 | else | |
| 271 | return regulator_mode_to_status(ret); | |
| 272 | } | |
| 273 | ||
| 274 | static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev, | |
| 275 | int input_uV, | |
| 276 | int output_uV, int load_uA) | |
| 277 | { | |
| 278 | if (load_uA < 20000) | |
| 279 | return REGULATOR_MODE_STANDBY; | |
| 280 | if (load_uA < 50000) | |
| 281 | return REGULATOR_MODE_IDLE; | |
| 282 | return REGULATOR_MODE_NORMAL; | |
| 283 | } | |
| 284 | ||
| 285 | ||
| 286 | static struct regulator_ops wm831x_gp_ldo_ops = { | |
| 287 | .list_voltage = wm831x_gp_ldo_list_voltage, | |
| 288 | .get_voltage = wm831x_gp_ldo_get_voltage, | |
| 289 | .set_voltage = wm831x_gp_ldo_set_voltage, | |
| 290 | .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage, | |
| 291 | .get_mode = wm831x_gp_ldo_get_mode, | |
| 292 | .set_mode = wm831x_gp_ldo_set_mode, | |
| 293 | .get_status = wm831x_gp_ldo_get_status, | |
| 294 | .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode, | |
| 295 | ||
| 296 | .is_enabled = wm831x_ldo_is_enabled, | |
| 297 | .enable = wm831x_ldo_enable, | |
| 298 | .disable = wm831x_ldo_disable, | |
| 299 | }; | |
| 300 | ||
| 301 | static __devinit int wm831x_gp_ldo_probe(struct platform_device *pdev) | |
| 302 | { | |
| 303 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
| 304 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
| 305 | int id = pdev->id % ARRAY_SIZE(pdata->ldo); | |
| 306 | struct wm831x_ldo *ldo; | |
| 307 | struct resource *res; | |
| 308 | int ret, irq; | |
| 309 | ||
| 310 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
| 311 | ||
| 312 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
| 313 | return -ENODEV; | |
| 314 | ||
| 315 | ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); | |
| 316 | if (ldo == NULL) { | |
| 317 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
| 318 | return -ENOMEM; | |
| 319 | } | |
| 320 | ||
| 321 | ldo->wm831x = wm831x; | |
| 322 | ||
| 323 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
| 324 | if (res == NULL) { | |
| 325 | dev_err(&pdev->dev, "No I/O resource\n"); | |
| 326 | ret = -EINVAL; | |
| 327 | goto err; | |
| 328 | } | |
| 329 | ldo->base = res->start; | |
| 330 | ||
| 331 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
| 332 | ldo->desc.name = ldo->name; | |
| 333 | ldo->desc.id = id; | |
| 334 | ldo->desc.type = REGULATOR_VOLTAGE; | |
| 335 | ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1; | |
| 336 | ldo->desc.ops = &wm831x_gp_ldo_ops; | |
| 337 | ldo->desc.owner = THIS_MODULE; | |
| 338 | ||
| 339 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
| 340 | pdata->ldo[id], ldo); | |
| 341 | if (IS_ERR(ldo->regulator)) { | |
| 342 | ret = PTR_ERR(ldo->regulator); | |
| 343 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
| 344 | id + 1, ret); | |
| 345 | goto err; | |
| 346 | } | |
| 347 | ||
| 348 | irq = platform_get_irq_byname(pdev, "UV"); | |
| 349 | ret = wm831x_request_irq(wm831x, irq, wm831x_ldo_uv_irq, | |
| 350 | IRQF_TRIGGER_RISING, ldo->name, | |
| 351 | ldo); | |
| 352 | if (ret != 0) { | |
| 353 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
| 354 | irq, ret); | |
| 355 | goto err_regulator; | |
| 356 | } | |
| 357 | ||
| 358 | platform_set_drvdata(pdev, ldo); | |
| 359 | ||
| 360 | return 0; | |
| 361 | ||
| 362 | err_regulator: | |
| 363 | regulator_unregister(ldo->regulator); | |
| 364 | err: | |
| 365 | kfree(ldo); | |
| 366 | return ret; | |
| 367 | } | |
| 368 | ||
| 369 | static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev) | |
| 370 | { | |
| 371 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
| 372 | struct wm831x *wm831x = ldo->wm831x; | |
| 373 | ||
| eb66d565 DT |
374 | platform_set_drvdata(pdev, NULL); |
| 375 | ||
| d1c6b4fe MB |
376 | wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), ldo); |
| 377 | regulator_unregister(ldo->regulator); | |
| 378 | kfree(ldo); | |
| 379 | ||
| 380 | return 0; | |
| 381 | } | |
| 382 | ||
| 383 | static struct platform_driver wm831x_gp_ldo_driver = { | |
| 384 | .probe = wm831x_gp_ldo_probe, | |
| 385 | .remove = __devexit_p(wm831x_gp_ldo_remove), | |
| 386 | .driver = { | |
| 387 | .name = "wm831x-ldo", | |
| eb66d565 | 388 | .owner = THIS_MODULE, |
| d1c6b4fe MB |
389 | }, |
| 390 | }; | |
| 391 | ||
| 392 | /* | |
| 393 | * Analogue LDOs | |
| 394 | */ | |
| 395 | ||
| 396 | ||
| 397 | #define WM831X_ALDO_SELECTOR_LOW 0xc | |
| 398 | #define WM831X_ALDO_MAX_SELECTOR 0x1f | |
| 399 | ||
| 400 | static int wm831x_aldo_list_voltage(struct regulator_dev *rdev, | |
| 401 | unsigned int selector) | |
| 402 | { | |
| 403 | /* 1-1.6V in 50mV steps */ | |
| 404 | if (selector <= WM831X_ALDO_SELECTOR_LOW) | |
| 405 | return 1000000 + (selector * 50000); | |
| 406 | /* 1.7-3.5V in 50mV steps */ | |
| 407 | if (selector <= WM831X_ALDO_MAX_SELECTOR) | |
| 408 | return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW) | |
| 409 | * 100000); | |
| 410 | return -EINVAL; | |
| 411 | } | |
| 412 | ||
| 413 | static int wm831x_aldo_set_voltage_int(struct regulator_dev *rdev, int reg, | |
| 414 | int min_uV, int max_uV) | |
| 415 | { | |
| 416 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 417 | struct wm831x *wm831x = ldo->wm831x; | |
| 418 | int vsel, ret; | |
| 419 | ||
| 420 | if (min_uV < 1000000) | |
| 421 | vsel = 0; | |
| 422 | else if (min_uV < 1700000) | |
| 423 | vsel = ((min_uV - 1000000) / 50000); | |
| 424 | else | |
| 425 | vsel = ((min_uV - 1700000) / 100000) | |
| 426 | + WM831X_ALDO_SELECTOR_LOW + 1; | |
| 427 | ||
| 428 | ret = wm831x_aldo_list_voltage(rdev, vsel); | |
| 429 | if (ret < 0) | |
| 430 | return ret; | |
| 431 | if (ret < min_uV || ret > max_uV) | |
| 432 | return -EINVAL; | |
| 433 | ||
| 434 | return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, vsel); | |
| 435 | } | |
| 436 | ||
| 437 | static int wm831x_aldo_set_voltage(struct regulator_dev *rdev, | |
| 438 | int min_uV, int max_uV) | |
| 439 | { | |
| 440 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 441 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
| 442 | ||
| 443 | return wm831x_aldo_set_voltage_int(rdev, reg, min_uV, max_uV); | |
| 444 | } | |
| 445 | ||
| 446 | static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev, | |
| 447 | int uV) | |
| 448 | { | |
| 449 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 450 | int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; | |
| 451 | ||
| 452 | return wm831x_aldo_set_voltage_int(rdev, reg, uV, uV); | |
| 453 | } | |
| 454 | ||
| 455 | static int wm831x_aldo_get_voltage(struct regulator_dev *rdev) | |
| 456 | { | |
| 457 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 458 | struct wm831x *wm831x = ldo->wm831x; | |
| 459 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
| 460 | int ret; | |
| 461 | ||
| 462 | ret = wm831x_reg_read(wm831x, reg); | |
| 463 | if (ret < 0) | |
| 464 | return ret; | |
| 465 | ||
| 466 | ret &= WM831X_LDO7_ON_VSEL_MASK; | |
| 467 | ||
| 468 | return wm831x_aldo_list_voltage(rdev, ret); | |
| 469 | } | |
| 470 | ||
| 471 | static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev) | |
| 472 | { | |
| 473 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 474 | struct wm831x *wm831x = ldo->wm831x; | |
| 475 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
| 6f17c652 | 476 | int ret; |
| d1c6b4fe MB |
477 | |
| 478 | ret = wm831x_reg_read(wm831x, on_reg); | |
| 479 | if (ret < 0) | |
| 480 | return 0; | |
| 481 | ||
| 482 | if (ret & WM831X_LDO7_ON_MODE) | |
| 483 | return REGULATOR_MODE_IDLE; | |
| 484 | else | |
| 485 | return REGULATOR_MODE_NORMAL; | |
| 486 | } | |
| 487 | ||
| 488 | static int wm831x_aldo_set_mode(struct regulator_dev *rdev, | |
| 489 | unsigned int mode) | |
| 490 | { | |
| 491 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 492 | struct wm831x *wm831x = ldo->wm831x; | |
| 493 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
| 494 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
| 495 | int ret; | |
| 496 | ||
| 497 | ||
| 498 | switch (mode) { | |
| 499 | case REGULATOR_MODE_NORMAL: | |
| 500 | ret = wm831x_set_bits(wm831x, on_reg, | |
| 501 | WM831X_LDO7_ON_MODE, 0); | |
| 502 | if (ret < 0) | |
| 503 | return ret; | |
| 504 | break; | |
| 505 | ||
| 506 | case REGULATOR_MODE_IDLE: | |
| 507 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
| 508 | WM831X_LDO7_ON_MODE, | |
| 509 | WM831X_LDO7_ON_MODE); | |
| 510 | if (ret < 0) | |
| 511 | return ret; | |
| 512 | break; | |
| 513 | ||
| 514 | default: | |
| 515 | return -EINVAL; | |
| 516 | } | |
| 517 | ||
| 518 | return 0; | |
| 519 | } | |
| 520 | ||
| 521 | static int wm831x_aldo_get_status(struct regulator_dev *rdev) | |
| 522 | { | |
| 523 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 524 | struct wm831x *wm831x = ldo->wm831x; | |
| 525 | int mask = 1 << rdev_get_id(rdev); | |
| 526 | int ret; | |
| 527 | ||
| 528 | /* Is the regulator on? */ | |
| 529 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
| 530 | if (ret < 0) | |
| 531 | return ret; | |
| 532 | if (!(ret & mask)) | |
| 533 | return REGULATOR_STATUS_OFF; | |
| 534 | ||
| 535 | /* Is it reporting under voltage? */ | |
| 536 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); | |
| 537 | if (ret & mask) | |
| 538 | return REGULATOR_STATUS_ERROR; | |
| 539 | ||
| 540 | ret = wm831x_aldo_get_mode(rdev); | |
| 541 | if (ret < 0) | |
| 542 | return ret; | |
| 543 | else | |
| 544 | return regulator_mode_to_status(ret); | |
| 545 | } | |
| 546 | ||
| 547 | static struct regulator_ops wm831x_aldo_ops = { | |
| 548 | .list_voltage = wm831x_aldo_list_voltage, | |
| 549 | .get_voltage = wm831x_aldo_get_voltage, | |
| 550 | .set_voltage = wm831x_aldo_set_voltage, | |
| 551 | .set_suspend_voltage = wm831x_aldo_set_suspend_voltage, | |
| 552 | .get_mode = wm831x_aldo_get_mode, | |
| 553 | .set_mode = wm831x_aldo_set_mode, | |
| 554 | .get_status = wm831x_aldo_get_status, | |
| 555 | ||
| 556 | .is_enabled = wm831x_ldo_is_enabled, | |
| 557 | .enable = wm831x_ldo_enable, | |
| 558 | .disable = wm831x_ldo_disable, | |
| 559 | }; | |
| 560 | ||
| 561 | static __devinit int wm831x_aldo_probe(struct platform_device *pdev) | |
| 562 | { | |
| 563 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
| 564 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
| 565 | int id = pdev->id % ARRAY_SIZE(pdata->ldo); | |
| 566 | struct wm831x_ldo *ldo; | |
| 567 | struct resource *res; | |
| 568 | int ret, irq; | |
| 569 | ||
| 570 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
| 571 | ||
| 572 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
| 573 | return -ENODEV; | |
| 574 | ||
| 575 | ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); | |
| 576 | if (ldo == NULL) { | |
| 577 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
| 578 | return -ENOMEM; | |
| 579 | } | |
| 580 | ||
| 581 | ldo->wm831x = wm831x; | |
| 582 | ||
| 583 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
| 584 | if (res == NULL) { | |
| 585 | dev_err(&pdev->dev, "No I/O resource\n"); | |
| 586 | ret = -EINVAL; | |
| 587 | goto err; | |
| 588 | } | |
| 589 | ldo->base = res->start; | |
| 590 | ||
| 591 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
| 592 | ldo->desc.name = ldo->name; | |
| 593 | ldo->desc.id = id; | |
| 594 | ldo->desc.type = REGULATOR_VOLTAGE; | |
| 595 | ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1; | |
| 596 | ldo->desc.ops = &wm831x_aldo_ops; | |
| 597 | ldo->desc.owner = THIS_MODULE; | |
| 598 | ||
| 599 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
| 600 | pdata->ldo[id], ldo); | |
| 601 | if (IS_ERR(ldo->regulator)) { | |
| 602 | ret = PTR_ERR(ldo->regulator); | |
| 603 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
| 604 | id + 1, ret); | |
| 605 | goto err; | |
| 606 | } | |
| 607 | ||
| 608 | irq = platform_get_irq_byname(pdev, "UV"); | |
| 609 | ret = wm831x_request_irq(wm831x, irq, wm831x_ldo_uv_irq, | |
| 610 | IRQF_TRIGGER_RISING, ldo->name, | |
| 611 | ldo); | |
| 612 | if (ret != 0) { | |
| 613 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
| 614 | irq, ret); | |
| 615 | goto err_regulator; | |
| 616 | } | |
| 617 | ||
| 618 | platform_set_drvdata(pdev, ldo); | |
| 619 | ||
| 620 | return 0; | |
| 621 | ||
| 622 | err_regulator: | |
| 623 | regulator_unregister(ldo->regulator); | |
| 624 | err: | |
| 625 | kfree(ldo); | |
| 626 | return ret; | |
| 627 | } | |
| 628 | ||
| 629 | static __devexit int wm831x_aldo_remove(struct platform_device *pdev) | |
| 630 | { | |
| 631 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
| 632 | struct wm831x *wm831x = ldo->wm831x; | |
| 633 | ||
| 634 | wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), ldo); | |
| 635 | regulator_unregister(ldo->regulator); | |
| 636 | kfree(ldo); | |
| 637 | ||
| 638 | return 0; | |
| 639 | } | |
| 640 | ||
| 641 | static struct platform_driver wm831x_aldo_driver = { | |
| 642 | .probe = wm831x_aldo_probe, | |
| 643 | .remove = __devexit_p(wm831x_aldo_remove), | |
| 644 | .driver = { | |
| 645 | .name = "wm831x-aldo", | |
| eb66d565 | 646 | .owner = THIS_MODULE, |
| d1c6b4fe MB |
647 | }, |
| 648 | }; | |
| 649 | ||
| 650 | /* | |
| 651 | * Alive LDO | |
| 652 | */ | |
| 653 | ||
| 654 | #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf | |
| 655 | ||
| 656 | static int wm831x_alive_ldo_list_voltage(struct regulator_dev *rdev, | |
| 657 | unsigned int selector) | |
| 658 | { | |
| 659 | /* 0.8-1.55V in 50mV steps */ | |
| 660 | if (selector <= WM831X_ALIVE_LDO_MAX_SELECTOR) | |
| 661 | return 800000 + (selector * 50000); | |
| 662 | return -EINVAL; | |
| 663 | } | |
| 664 | ||
| 665 | static int wm831x_alive_ldo_set_voltage_int(struct regulator_dev *rdev, | |
| 666 | int reg, | |
| 667 | int min_uV, int max_uV) | |
| 668 | { | |
| 669 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 670 | struct wm831x *wm831x = ldo->wm831x; | |
| 671 | int vsel, ret; | |
| 672 | ||
| 673 | vsel = (min_uV - 800000) / 50000; | |
| 674 | ||
| 675 | ret = wm831x_alive_ldo_list_voltage(rdev, vsel); | |
| 676 | if (ret < 0) | |
| 677 | return ret; | |
| 678 | if (ret < min_uV || ret > max_uV) | |
| 679 | return -EINVAL; | |
| 680 | ||
| 681 | return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, vsel); | |
| 682 | } | |
| 683 | ||
| 684 | static int wm831x_alive_ldo_set_voltage(struct regulator_dev *rdev, | |
| 685 | int min_uV, int max_uV) | |
| 686 | { | |
| 687 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 688 | int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; | |
| 689 | ||
| 690 | return wm831x_alive_ldo_set_voltage_int(rdev, reg, min_uV, max_uV); | |
| 691 | } | |
| 692 | ||
| 693 | static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev, | |
| 694 | int uV) | |
| 695 | { | |
| 696 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 697 | int reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL; | |
| 698 | ||
| 699 | return wm831x_alive_ldo_set_voltage_int(rdev, reg, uV, uV); | |
| 700 | } | |
| 701 | ||
| 702 | static int wm831x_alive_ldo_get_voltage(struct regulator_dev *rdev) | |
| 703 | { | |
| 704 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 705 | struct wm831x *wm831x = ldo->wm831x; | |
| 706 | int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; | |
| 707 | int ret; | |
| 708 | ||
| 709 | ret = wm831x_reg_read(wm831x, reg); | |
| 710 | if (ret < 0) | |
| 711 | return ret; | |
| 712 | ||
| 713 | ret &= WM831X_LDO11_ON_VSEL_MASK; | |
| 714 | ||
| 715 | return wm831x_alive_ldo_list_voltage(rdev, ret); | |
| 716 | } | |
| 717 | ||
| 718 | static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev) | |
| 719 | { | |
| 720 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
| 721 | struct wm831x *wm831x = ldo->wm831x; | |
| 722 | int mask = 1 << rdev_get_id(rdev); | |
| 723 | int ret; | |
| 724 | ||
| 725 | /* Is the regulator on? */ | |
| 726 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
| 727 | if (ret < 0) | |
| 728 | return ret; | |
| 729 | if (ret & mask) | |
| 730 | return REGULATOR_STATUS_ON; | |
| 731 | else | |
| 732 | return REGULATOR_STATUS_OFF; | |
| 733 | } | |
| 734 | ||
| 735 | static struct regulator_ops wm831x_alive_ldo_ops = { | |
| 736 | .list_voltage = wm831x_alive_ldo_list_voltage, | |
| 737 | .get_voltage = wm831x_alive_ldo_get_voltage, | |
| 738 | .set_voltage = wm831x_alive_ldo_set_voltage, | |
| 739 | .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage, | |
| 740 | .get_status = wm831x_alive_ldo_get_status, | |
| 741 | ||
| 742 | .is_enabled = wm831x_ldo_is_enabled, | |
| 743 | .enable = wm831x_ldo_enable, | |
| 744 | .disable = wm831x_ldo_disable, | |
| 745 | }; | |
| 746 | ||
| 747 | static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev) | |
| 748 | { | |
| 749 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
| 750 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
| 751 | int id = pdev->id % ARRAY_SIZE(pdata->ldo); | |
| 752 | struct wm831x_ldo *ldo; | |
| 753 | struct resource *res; | |
| 754 | int ret; | |
| 755 | ||
| 756 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
| 757 | ||
| 758 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
| 759 | return -ENODEV; | |
| 760 | ||
| 761 | ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); | |
| 762 | if (ldo == NULL) { | |
| 763 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
| 764 | return -ENOMEM; | |
| 765 | } | |
| 766 | ||
| 767 | ldo->wm831x = wm831x; | |
| 768 | ||
| 769 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
| 770 | if (res == NULL) { | |
| 771 | dev_err(&pdev->dev, "No I/O resource\n"); | |
| 772 | ret = -EINVAL; | |
| 773 | goto err; | |
| 774 | } | |
| 775 | ldo->base = res->start; | |
| 776 | ||
| 777 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
| 778 | ldo->desc.name = ldo->name; | |
| 779 | ldo->desc.id = id; | |
| 780 | ldo->desc.type = REGULATOR_VOLTAGE; | |
| 781 | ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1; | |
| 782 | ldo->desc.ops = &wm831x_alive_ldo_ops; | |
| 783 | ldo->desc.owner = THIS_MODULE; | |
| 784 | ||
| 785 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
| 786 | pdata->ldo[id], ldo); | |
| 787 | if (IS_ERR(ldo->regulator)) { | |
| 788 | ret = PTR_ERR(ldo->regulator); | |
| 789 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
| 790 | id + 1, ret); | |
| 791 | goto err; | |
| 792 | } | |
| 793 | ||
| 794 | platform_set_drvdata(pdev, ldo); | |
| 795 | ||
| 796 | return 0; | |
| 797 | ||
| 798 | err: | |
| 799 | kfree(ldo); | |
| 800 | return ret; | |
| 801 | } | |
| 802 | ||
| 803 | static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev) | |
| 804 | { | |
| 805 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
| 806 | ||
| 807 | regulator_unregister(ldo->regulator); | |
| 808 | kfree(ldo); | |
| 809 | ||
| 810 | return 0; | |
| 811 | } | |
| 812 | ||
| 813 | static struct platform_driver wm831x_alive_ldo_driver = { | |
| 814 | .probe = wm831x_alive_ldo_probe, | |
| 815 | .remove = __devexit_p(wm831x_alive_ldo_remove), | |
| 816 | .driver = { | |
| 817 | .name = "wm831x-alive-ldo", | |
| eb66d565 | 818 | .owner = THIS_MODULE, |
| d1c6b4fe MB |
819 | }, |
| 820 | }; | |
| 821 | ||
| 822 | static int __init wm831x_ldo_init(void) | |
| 823 | { | |
| 824 | int ret; | |
| 825 | ||
| 826 | ret = platform_driver_register(&wm831x_gp_ldo_driver); | |
| 827 | if (ret != 0) | |
| 828 | pr_err("Failed to register WM831x GP LDO driver: %d\n", ret); | |
| 829 | ||
| 830 | ret = platform_driver_register(&wm831x_aldo_driver); | |
| 831 | if (ret != 0) | |
| 832 | pr_err("Failed to register WM831x ALDO driver: %d\n", ret); | |
| 833 | ||
| 834 | ret = platform_driver_register(&wm831x_alive_ldo_driver); | |
| 835 | if (ret != 0) | |
| 836 | pr_err("Failed to register WM831x alive LDO driver: %d\n", | |
| 837 | ret); | |
| 838 | ||
| 839 | return 0; | |
| 840 | } | |
| 841 | subsys_initcall(wm831x_ldo_init); | |
| 842 | ||
| 843 | static void __exit wm831x_ldo_exit(void) | |
| 844 | { | |
| 845 | platform_driver_unregister(&wm831x_alive_ldo_driver); | |
| 846 | platform_driver_unregister(&wm831x_aldo_driver); | |
| 847 | platform_driver_unregister(&wm831x_gp_ldo_driver); | |
| 848 | } | |
| 849 | module_exit(wm831x_ldo_exit); | |
| 850 | ||
| 851 | /* Module information */ | |
| 852 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
| 853 | MODULE_DESCRIPTION("WM831x LDO driver"); | |
| 854 | MODULE_LICENSE("GPL"); | |
| 855 | MODULE_ALIAS("platform:wm831x-ldo"); | |
| 856 | MODULE_ALIAS("platform:wm831x-aldo"); | |
| 857 | MODULE_ALIAS("platform:wm831x-aliveldo"); |