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regulator: ab3100: Convert fixed voltage to use regulator_list_voltage_linear
[mirror_ubuntu-zesty-kernel.git] / drivers / regulator / wm831x-ldo.c
CommitLineData
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>
5a0e3ad6 22#include <linux/slab.h>
d1c6b4fe
MB		 23
24#include <linux/mfd/wm831x/core.h>
25#include <linux/mfd/wm831x/regulator.h>
26#include <linux/mfd/wm831x/pdata.h>
27
f1aba13f 28#define WM831X_LDO_MAX_NAME 9
d1c6b4fe
MB		 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
37struct wm831x_ldo {
38 char name[WM831X_LDO_MAX_NAME];
f1aba13f 39 char supply_name[WM831X_LDO_MAX_NAME];
d1c6b4fe
MB		 40 struct regulator_desc desc;
41 int base;
42 struct wm831x *wm831x;
43 struct regulator_dev *regulator;
44};
45
46/*
47 * Shared
48 */
49
d1c6b4fe
MB		 50static 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
68static 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);
6085d4d9 74 /* 1.7-3.3V in 100mV steps */
d1c6b4fe
MB		 75 if (selector <= WM831X_GP_LDO_MAX_SELECTOR)
76 return 1600000 + ((selector - WM831X_GP_LDO_SELECTOR_LOW)
77 * 100000);
78 return -EINVAL;
79}
80
81static int wm831x_gp_ldo_set_voltage_int(struct regulator_dev *rdev, int reg,
3a93f2a9
MB		 82 int min_uV, int max_uV,
83 unsigned *selector)
d1c6b4fe
MB		 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
3a93f2a9
MB		 103 *selector = vsel;
104
d1c6b4fe
MB		 105 return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, vsel);
106}
107
108static int wm831x_gp_ldo_set_voltage(struct regulator_dev *rdev,
3a93f2a9
MB		 109 int min_uV, int max_uV,
110 unsigned *selector)
d1c6b4fe
MB		 111{
112 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
113 int reg = ldo->base + WM831X_LDO_ON_CONTROL;
114
3a93f2a9
MB		 115 return wm831x_gp_ldo_set_voltage_int(rdev, reg, min_uV, max_uV,
116 selector);
d1c6b4fe
MB		 117}
118
119static 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;
3a93f2a9 124 unsigned int selector;
d1c6b4fe 125
3a93f2a9 126 return wm831x_gp_ldo_set_voltage_int(rdev, reg, uV, uV, &selector);
d1c6b4fe
MB		 127}
128
d1c6b4fe
MB		 129static 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;
9a767d43 135 int ret;
d1c6b4fe
MB		 136
137 ret = wm831x_reg_read(wm831x, on_reg);
138 if (ret < 0)
9a767d43 139 return ret;
d1c6b4fe
MB		 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)
9a767d43 146 return ret;
d1c6b4fe
MB		 147
148 if (ret & WM831X_LDO1_LP_MODE)
149 return REGULATOR_MODE_STANDBY;
150 else
151 return REGULATOR_MODE_IDLE;
152}
153
154static 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,
e260999c 174 WM831X_LDO1_LP_MODE, 0);
d1c6b4fe
MB		 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;
e260999c 183 break;
d1c6b4fe
MB		 184
185 case REGULATOR_MODE_STANDBY:
186 ret = wm831x_set_bits(wm831x, ctrl_reg,
e260999c
AL		 187 WM831X_LDO1_LP_MODE,
188 WM831X_LDO1_LP_MODE);
d1c6b4fe
MB		 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
206static 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
232static 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
244static struct regulator_ops wm831x_gp_ldo_ops = {
245 .list_voltage = wm831x_gp_ldo_list_voltage,
ac663b47 246 .get_voltage_sel = regulator_get_voltage_sel_regmap,
d1c6b4fe
MB		 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
ca8c361b
MB		 254 .is_enabled = regulator_is_enabled_regmap,
255 .enable = regulator_enable_regmap,
256 .disable = regulator_disable_regmap,
d1c6b4fe
MB		 257};
258
259static __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;
c172708d 263 struct regulator_config config = { };
137a6354 264 int id;
d1c6b4fe
MB		 265 struct wm831x_ldo *ldo;
266 struct resource *res;
267 int ret, irq;
268
137a6354
MB		 269 if (pdata && pdata->wm831x_num)
270 id = (pdata->wm831x_num * 10) + 1;
271 else
272 id = 0;
273 id = pdev->id - id;
274
d1c6b4fe
MB		 275 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
276
fded2f4f 277 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
d1c6b4fe
MB		 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;
f1aba13f
MB		 295
296 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
297 "LDO%dVDD", id + 1);
298 ldo->desc.supply_name = ldo->supply_name;
299
d1c6b4fe
MB		 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;
ac663b47
MB		 305 ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
306 ldo->desc.vsel_mask = WM831X_LDO1_ON_VSEL_MASK;
ca8c361b
MB		 307 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
308 ldo->desc.enable_mask = 1 << id;
d1c6b4fe 309
c172708d 310 config.dev = pdev->dev.parent;
b7ca8788
MB		 311 if (pdata)
312 config.init_data = pdata->ldo[id];
c172708d 313 config.driver_data = ldo;
ac663b47 314 config.regmap = wm831x->regmap;
c172708d
MB		 315
316 ldo->regulator = regulator_register(&ldo->desc, &config);
d1c6b4fe
MB		 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
cd99758b 324 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
dfda9c27
MB		 325 ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq,
326 IRQF_TRIGGER_RISING, ldo->name,
327 ldo);
d1c6b4fe
MB		 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
338err_regulator:
339 regulator_unregister(ldo->regulator);
340err:
d1c6b4fe
MB		 341 return ret;
342}
343
344static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev)
345{
346 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
d1c6b4fe 347
eb66d565
DT		 348 platform_set_drvdata(pdev, NULL);
349
cd99758b
MB		 350 free_irq(wm831x_irq(ldo->wm831x,
351 platform_get_irq_byname(pdev, "UV")), ldo);
d1c6b4fe 352 regulator_unregister(ldo->regulator);
d1c6b4fe
MB		 353
354 return 0;
355}
356
357static struct platform_driver wm831x_gp_ldo_driver = {
358 .probe = wm831x_gp_ldo_probe,
359 .remove = __devexit_p(wm831x_gp_ldo_remove),
360 .driver = {
361 .name = "wm831x-ldo",
eb66d565 362 .owner = THIS_MODULE,
d1c6b4fe
MB		 363 },
364};
365
366/*
367 * Analogue LDOs
368 */
369
370
371#define WM831X_ALDO_SELECTOR_LOW 0xc
372#define WM831X_ALDO_MAX_SELECTOR 0x1f
373
374static int wm831x_aldo_list_voltage(struct regulator_dev *rdev,
375 unsigned int selector)
376{
377 /* 1-1.6V in 50mV steps */
378 if (selector <= WM831X_ALDO_SELECTOR_LOW)
379 return 1000000 + (selector * 50000);
6085d4d9 380 /* 1.7-3.5V in 100mV steps */
d1c6b4fe
MB		 381 if (selector <= WM831X_ALDO_MAX_SELECTOR)
382 return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW)
383 * 100000);
384 return -EINVAL;
385}
386
387static int wm831x_aldo_set_voltage_int(struct regulator_dev *rdev, int reg,
3a93f2a9
MB		 388 int min_uV, int max_uV,
389 unsigned *selector)
d1c6b4fe
MB		 390{
391 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
392 struct wm831x *wm831x = ldo->wm831x;
393 int vsel, ret;
394
395 if (min_uV < 1000000)
396 vsel = 0;
397 else if (min_uV < 1700000)
398 vsel = ((min_uV - 1000000) / 50000);
399 else
400 vsel = ((min_uV - 1700000) / 100000)
401 + WM831X_ALDO_SELECTOR_LOW + 1;
402
403 ret = wm831x_aldo_list_voltage(rdev, vsel);
404 if (ret < 0)
405 return ret;
406 if (ret < min_uV || ret > max_uV)
407 return -EINVAL;
408
3a93f2a9
MB		 409 *selector = vsel;
410
d1c6b4fe
MB		 411 return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, vsel);
412}
413
414static int wm831x_aldo_set_voltage(struct regulator_dev *rdev,
3a93f2a9 415 int min_uV, int max_uV, unsigned *selector)
d1c6b4fe
MB		 416{
417 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
418 int reg = ldo->base + WM831X_LDO_ON_CONTROL;
419
3a93f2a9
MB		 420 return wm831x_aldo_set_voltage_int(rdev, reg, min_uV, max_uV,
421 selector);
d1c6b4fe
MB		 422}
423
424static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev,
425 int uV)
426{
427 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
428 int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
3a93f2a9 429 unsigned int selector;
d1c6b4fe 430
3a93f2a9 431 return wm831x_aldo_set_voltage_int(rdev, reg, uV, uV, &selector);
d1c6b4fe
MB		 432}
433
d1c6b4fe
MB		 434static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev)
435{
436 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
437 struct wm831x *wm831x = ldo->wm831x;
438 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
6f17c652 439 int ret;
d1c6b4fe
MB		 440
441 ret = wm831x_reg_read(wm831x, on_reg);
442 if (ret < 0)
443 return 0;
444
445 if (ret & WM831X_LDO7_ON_MODE)
446 return REGULATOR_MODE_IDLE;
447 else
448 return REGULATOR_MODE_NORMAL;
449}
450
451static int wm831x_aldo_set_mode(struct regulator_dev *rdev,
452 unsigned int mode)
453{
454 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
455 struct wm831x *wm831x = ldo->wm831x;
d1c6b4fe
MB		 456 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
457 int ret;
458
459
460 switch (mode) {
461 case REGULATOR_MODE_NORMAL:
e841a36a 462 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, 0);
d1c6b4fe
MB		 463 if (ret < 0)
464 return ret;
465 break;
466
467 case REGULATOR_MODE_IDLE:
e841a36a 468 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE,
d1c6b4fe
MB		 469 WM831X_LDO7_ON_MODE);
470 if (ret < 0)
471 return ret;
472 break;
473
474 default:
475 return -EINVAL;
476 }
477
478 return 0;
479}
480
481static int wm831x_aldo_get_status(struct regulator_dev *rdev)
482{
483 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
484 struct wm831x *wm831x = ldo->wm831x;
485 int mask = 1 << rdev_get_id(rdev);
486 int ret;
487
488 /* Is the regulator on? */
489 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
490 if (ret < 0)
491 return ret;
492 if (!(ret & mask))
493 return REGULATOR_STATUS_OFF;
494
495 /* Is it reporting under voltage? */
496 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
497 if (ret & mask)
498 return REGULATOR_STATUS_ERROR;
499
500 ret = wm831x_aldo_get_mode(rdev);
501 if (ret < 0)
502 return ret;
503 else
504 return regulator_mode_to_status(ret);
505}
506
507static struct regulator_ops wm831x_aldo_ops = {
508 .list_voltage = wm831x_aldo_list_voltage,
ac663b47 509 .get_voltage_sel = regulator_get_voltage_sel_regmap,
d1c6b4fe
MB		 510 .set_voltage = wm831x_aldo_set_voltage,
511 .set_suspend_voltage = wm831x_aldo_set_suspend_voltage,
512 .get_mode = wm831x_aldo_get_mode,
513 .set_mode = wm831x_aldo_set_mode,
514 .get_status = wm831x_aldo_get_status,
515
ca8c361b
MB		 516 .is_enabled = regulator_is_enabled_regmap,
517 .enable = regulator_enable_regmap,
518 .disable = regulator_disable_regmap,
d1c6b4fe
MB		 519};
520
521static __devinit int wm831x_aldo_probe(struct platform_device *pdev)
522{
523 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
524 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
c172708d 525 struct regulator_config config = { };
137a6354 526 int id;
d1c6b4fe
MB		 527 struct wm831x_ldo *ldo;
528 struct resource *res;
529 int ret, irq;
530
137a6354
MB		 531 if (pdata && pdata->wm831x_num)
532 id = (pdata->wm831x_num * 10) + 1;
533 else
534 id = 0;
535 id = pdev->id - id;
536
d1c6b4fe
MB		 537 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
538
fded2f4f 539 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
d1c6b4fe
MB		 540 if (ldo == NULL) {
541 dev_err(&pdev->dev, "Unable to allocate private data\n");
542 return -ENOMEM;
543 }
544
545 ldo->wm831x = wm831x;
546
547 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
548 if (res == NULL) {
549 dev_err(&pdev->dev, "No I/O resource\n");
550 ret = -EINVAL;
551 goto err;
552 }
553 ldo->base = res->start;
554
555 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
556 ldo->desc.name = ldo->name;
f1aba13f
MB		 557
558 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
559 "LDO%dVDD", id + 1);
560 ldo->desc.supply_name = ldo->supply_name;
561
d1c6b4fe
MB		 562 ldo->desc.id = id;
563 ldo->desc.type = REGULATOR_VOLTAGE;
564 ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1;
565 ldo->desc.ops = &wm831x_aldo_ops;
566 ldo->desc.owner = THIS_MODULE;
ac663b47
MB		 567 ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
568 ldo->desc.vsel_mask = WM831X_LDO7_ON_VSEL_MASK;
ca8c361b
MB		 569 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
570 ldo->desc.enable_mask = 1 << id;
d1c6b4fe 571
c172708d 572 config.dev = pdev->dev.parent;
b7ca8788
MB		 573 if (pdata)
574 config.init_data = pdata->ldo[id];
c172708d 575 config.driver_data = ldo;
ac663b47 576 config.regmap = wm831x->regmap;
c172708d
MB		 577
578 ldo->regulator = regulator_register(&ldo->desc, &config);
d1c6b4fe
MB		 579 if (IS_ERR(ldo->regulator)) {
580 ret = PTR_ERR(ldo->regulator);
581 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
582 id + 1, ret);
583 goto err;
584 }
585
cd99758b 586 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
dfda9c27
MB		 587 ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq,
588 IRQF_TRIGGER_RISING, ldo->name, ldo);
d1c6b4fe
MB		 589 if (ret != 0) {
590 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
591 irq, ret);
592 goto err_regulator;
593 }
594
595 platform_set_drvdata(pdev, ldo);
596
597 return 0;
598
599err_regulator:
600 regulator_unregister(ldo->regulator);
601err:
d1c6b4fe
MB		 602 return ret;
603}
604
605static __devexit int wm831x_aldo_remove(struct platform_device *pdev)
606{
607 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
d1c6b4fe 608
cd99758b
MB		 609 free_irq(wm831x_irq(ldo->wm831x, platform_get_irq_byname(pdev, "UV")),
610 ldo);
d1c6b4fe 611 regulator_unregister(ldo->regulator);
d1c6b4fe
MB		 612
613 return 0;
614}
615
616static struct platform_driver wm831x_aldo_driver = {
617 .probe = wm831x_aldo_probe,
618 .remove = __devexit_p(wm831x_aldo_remove),
619 .driver = {
620 .name = "wm831x-aldo",
eb66d565 621 .owner = THIS_MODULE,
d1c6b4fe
MB		 622 },
623};
624
625/*
626 * Alive LDO
627 */
628
629#define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf
630
d1c6b4fe
MB		 631static int wm831x_alive_ldo_set_voltage_int(struct regulator_dev *rdev,
632 int reg,
3a93f2a9
MB		 633 int min_uV, int max_uV,
634 unsigned *selector)
d1c6b4fe
MB		 635{
636 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
637 struct wm831x *wm831x = ldo->wm831x;
638 int vsel, ret;
639
640 vsel = (min_uV - 800000) / 50000;
641
d31e954e 642 ret = regulator_list_voltage_linear(rdev, vsel);
d1c6b4fe
MB		 643 if (ret < 0)
644 return ret;
645 if (ret < min_uV || ret > max_uV)
646 return -EINVAL;
647
3a93f2a9
MB		 648 *selector = vsel;
649
d1c6b4fe
MB		 650 return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, vsel);
651}
652
653static int wm831x_alive_ldo_set_voltage(struct regulator_dev *rdev,
3a93f2a9
MB		 654 int min_uV, int max_uV,
655 unsigned *selector)
d1c6b4fe
MB		 656{
657 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
658 int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
659
3a93f2a9
MB		 660 return wm831x_alive_ldo_set_voltage_int(rdev, reg, min_uV, max_uV,
661 selector);
d1c6b4fe
MB		 662}
663
664static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev,
665 int uV)
666{
667 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
668 int reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL;
3a93f2a9 669 unsigned selector;
d1c6b4fe 670
3a93f2a9 671 return wm831x_alive_ldo_set_voltage_int(rdev, reg, uV, uV, &selector);
d1c6b4fe
MB		 672}
673
d1c6b4fe
MB		 674static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev)
675{
676 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
677 struct wm831x *wm831x = ldo->wm831x;
678 int mask = 1 << rdev_get_id(rdev);
679 int ret;
680
681 /* Is the regulator on? */
682 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
683 if (ret < 0)
684 return ret;
685 if (ret & mask)
686 return REGULATOR_STATUS_ON;
687 else
688 return REGULATOR_STATUS_OFF;
689}
690
691static struct regulator_ops wm831x_alive_ldo_ops = {
d31e954e 692 .list_voltage = regulator_list_voltage_linear,
c2543b5f 693 .map_voltage = regulator_map_voltage_linear,
ac663b47 694 .get_voltage_sel = regulator_get_voltage_sel_regmap,
d1c6b4fe
MB		 695 .set_voltage = wm831x_alive_ldo_set_voltage,
696 .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage,
697 .get_status = wm831x_alive_ldo_get_status,
698
ca8c361b
MB		 699 .is_enabled = regulator_is_enabled_regmap,
700 .enable = regulator_enable_regmap,
701 .disable = regulator_disable_regmap,
d1c6b4fe
MB		 702};
703
704static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev)
705{
706 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
707 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
c172708d 708 struct regulator_config config = { };
137a6354 709 int id;
d1c6b4fe
MB		 710 struct wm831x_ldo *ldo;
711 struct resource *res;
712 int ret;
713
137a6354
MB		 714 if (pdata && pdata->wm831x_num)
715 id = (pdata->wm831x_num * 10) + 1;
716 else
717 id = 0;
718 id = pdev->id - id;
719
720
d1c6b4fe
MB		 721 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
722
fded2f4f 723 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
d1c6b4fe
MB		 724 if (ldo == NULL) {
725 dev_err(&pdev->dev, "Unable to allocate private data\n");
726 return -ENOMEM;
727 }
728
729 ldo->wm831x = wm831x;
730
731 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
732 if (res == NULL) {
733 dev_err(&pdev->dev, "No I/O resource\n");
734 ret = -EINVAL;
735 goto err;
736 }
737 ldo->base = res->start;
738
739 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
740 ldo->desc.name = ldo->name;
f1aba13f
MB		 741
742 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
743 "LDO%dVDD", id + 1);
744 ldo->desc.supply_name = ldo->supply_name;
745
d1c6b4fe
MB		 746 ldo->desc.id = id;
747 ldo->desc.type = REGULATOR_VOLTAGE;
748 ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1;
749 ldo->desc.ops = &wm831x_alive_ldo_ops;
750 ldo->desc.owner = THIS_MODULE;
ac663b47
MB		 751 ldo->desc.vsel_reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
752 ldo->desc.vsel_mask = WM831X_LDO11_ON_VSEL_MASK;
ca8c361b
MB		 753 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
754 ldo->desc.enable_mask = 1 << id;
d31e954e
MB		 755 ldo->desc.min_uV = 800000;
756 ldo->desc.uV_step = 50000;
d1c6b4fe 757
c172708d 758 config.dev = pdev->dev.parent;
b7ca8788
MB		 759 if (pdata)
760 config.init_data = pdata->ldo[id];
c172708d 761 config.driver_data = ldo;
ac663b47 762 config.regmap = wm831x->regmap;
c172708d
MB		 763
764 ldo->regulator = regulator_register(&ldo->desc, &config);
d1c6b4fe
MB		 765 if (IS_ERR(ldo->regulator)) {
766 ret = PTR_ERR(ldo->regulator);
767 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
768 id + 1, ret);
769 goto err;
770 }
771
772 platform_set_drvdata(pdev, ldo);
773
774 return 0;
775
776err:
d1c6b4fe
MB		 777 return ret;
778}
779
780static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev)
781{
782 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
783
784 regulator_unregister(ldo->regulator);
d1c6b4fe
MB		 785
786 return 0;
787}
788
789static struct platform_driver wm831x_alive_ldo_driver = {
790 .probe = wm831x_alive_ldo_probe,
791 .remove = __devexit_p(wm831x_alive_ldo_remove),
792 .driver = {
793 .name = "wm831x-alive-ldo",
eb66d565 794 .owner = THIS_MODULE,
d1c6b4fe
MB		 795 },
796};
797
798static int __init wm831x_ldo_init(void)
799{
800 int ret;
801
802 ret = platform_driver_register(&wm831x_gp_ldo_driver);
803 if (ret != 0)
804 pr_err("Failed to register WM831x GP LDO driver: %d\n", ret);
805
806 ret = platform_driver_register(&wm831x_aldo_driver);
807 if (ret != 0)
808 pr_err("Failed to register WM831x ALDO driver: %d\n", ret);
809
810 ret = platform_driver_register(&wm831x_alive_ldo_driver);
811 if (ret != 0)
812 pr_err("Failed to register WM831x alive LDO driver: %d\n",
813 ret);
814
815 return 0;
816}
817subsys_initcall(wm831x_ldo_init);
818
819static void __exit wm831x_ldo_exit(void)
820{
821 platform_driver_unregister(&wm831x_alive_ldo_driver);
822 platform_driver_unregister(&wm831x_aldo_driver);
823 platform_driver_unregister(&wm831x_gp_ldo_driver);
824}
825module_exit(wm831x_ldo_exit);
826
827/* Module information */
828MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
829MODULE_DESCRIPTION("WM831x LDO driver");
830MODULE_LICENSE("GPL");
831MODULE_ALIAS("platform:wm831x-ldo");
832MODULE_ALIAS("platform:wm831x-aldo");
833MODULE_ALIAS("platform:wm831x-aliveldo");
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