projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
regulator: Remove max_uV from struct regulator_linear_range
[deliverable/linux.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
5ff26a14 65static const struct regulator_linear_range wm831x_gp_ldo_ranges[] = {
e277e656
AL		 66 { .min_uV = 900000, .min_sel = 0, .max_sel = 14, .uV_step = 50000 },
67 { .min_uV = 1700000, .min_sel = 15, .max_sel = 31, .uV_step = 100000 },
5ff26a14 68};
d1c6b4fe
MB		 69
70static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev,
71 int uV)
72{
73 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
0a479689
AL		 74 struct wm831x *wm831x = ldo->wm831x;
75 int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
d1c6b4fe 76
5ff26a14 77 sel = regulator_map_voltage_linear_range(rdev, uV, uV);
0a479689
AL		 78 if (sel < 0)
79 return sel;
80
81 return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, sel);
d1c6b4fe
MB		 82}
83
d1c6b4fe
MB		 84static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev)
85{
86 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
87 struct wm831x *wm831x = ldo->wm831x;
88 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
89 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
9a767d43 90 int ret;
d1c6b4fe
MB		 91
92 ret = wm831x_reg_read(wm831x, on_reg);
93 if (ret < 0)
9a767d43 94 return ret;
d1c6b4fe
MB		 95
96 if (!(ret & WM831X_LDO1_ON_MODE))
97 return REGULATOR_MODE_NORMAL;
98
99 ret = wm831x_reg_read(wm831x, ctrl_reg);
100 if (ret < 0)
9a767d43 101 return ret;
d1c6b4fe
MB		 102
103 if (ret & WM831X_LDO1_LP_MODE)
104 return REGULATOR_MODE_STANDBY;
105 else
106 return REGULATOR_MODE_IDLE;
107}
108
109static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev,
110 unsigned int mode)
111{
112 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
113 struct wm831x *wm831x = ldo->wm831x;
114 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
115 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
116 int ret;
117
118
119 switch (mode) {
120 case REGULATOR_MODE_NORMAL:
121 ret = wm831x_set_bits(wm831x, on_reg,
122 WM831X_LDO1_ON_MODE, 0);
123 if (ret < 0)
124 return ret;
125 break;
126
127 case REGULATOR_MODE_IDLE:
128 ret = wm831x_set_bits(wm831x, ctrl_reg,
e260999c 129 WM831X_LDO1_LP_MODE, 0);
d1c6b4fe
MB		 130 if (ret < 0)
131 return ret;
132
133 ret = wm831x_set_bits(wm831x, on_reg,
134 WM831X_LDO1_ON_MODE,
135 WM831X_LDO1_ON_MODE);
136 if (ret < 0)
137 return ret;
e260999c 138 break;
d1c6b4fe
MB		 139
140 case REGULATOR_MODE_STANDBY:
141 ret = wm831x_set_bits(wm831x, ctrl_reg,
e260999c
AL		 142 WM831X_LDO1_LP_MODE,
143 WM831X_LDO1_LP_MODE);
d1c6b4fe
MB		 144 if (ret < 0)
145 return ret;
146
147 ret = wm831x_set_bits(wm831x, on_reg,
148 WM831X_LDO1_ON_MODE,
149 WM831X_LDO1_ON_MODE);
150 if (ret < 0)
151 return ret;
152 break;
153
154 default:
155 return -EINVAL;
156 }
157
158 return 0;
159}
160
161static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev)
162{
163 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
164 struct wm831x *wm831x = ldo->wm831x;
165 int mask = 1 << rdev_get_id(rdev);
166 int ret;
167
168 /* Is the regulator on? */
169 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
170 if (ret < 0)
171 return ret;
172 if (!(ret & mask))
173 return REGULATOR_STATUS_OFF;
174
175 /* Is it reporting under voltage? */
176 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
363506cd
AL		 177 if (ret < 0)
178 return ret;
d1c6b4fe
MB		 179 if (ret & mask)
180 return REGULATOR_STATUS_ERROR;
181
182 ret = wm831x_gp_ldo_get_mode(rdev);
183 if (ret < 0)
184 return ret;
185 else
186 return regulator_mode_to_status(ret);
187}
188
189static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev,
190 int input_uV,
191 int output_uV, int load_uA)
192{
193 if (load_uA < 20000)
194 return REGULATOR_MODE_STANDBY;
195 if (load_uA < 50000)
196 return REGULATOR_MODE_IDLE;
197 return REGULATOR_MODE_NORMAL;
198}
199
200
201static struct regulator_ops wm831x_gp_ldo_ops = {
5ff26a14
MB		 202 .list_voltage = regulator_list_voltage_linear_range,
203 .map_voltage = regulator_map_voltage_linear_range,
ac663b47 204 .get_voltage_sel = regulator_get_voltage_sel_regmap,
0a479689 205 .set_voltage_sel = regulator_set_voltage_sel_regmap,
d1c6b4fe
MB		 206 .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage,
207 .get_mode = wm831x_gp_ldo_get_mode,
208 .set_mode = wm831x_gp_ldo_set_mode,
209 .get_status = wm831x_gp_ldo_get_status,
210 .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode,
22c5fb6a
MB		 211 .get_bypass = regulator_get_bypass_regmap,
212 .set_bypass = regulator_set_bypass_regmap,
d1c6b4fe 213
ca8c361b
MB		 214 .is_enabled = regulator_is_enabled_regmap,
215 .enable = regulator_enable_regmap,
216 .disable = regulator_disable_regmap,
d1c6b4fe
MB		 217};
218
a5023574 219static int wm831x_gp_ldo_probe(struct platform_device *pdev)
d1c6b4fe
MB		 220{
221 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
dff91d0b 222 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
c172708d 223 struct regulator_config config = { };
137a6354 224 int id;
d1c6b4fe
MB		 225 struct wm831x_ldo *ldo;
226 struct resource *res;
227 int ret, irq;
228
137a6354
MB		 229 if (pdata && pdata->wm831x_num)
230 id = (pdata->wm831x_num * 10) + 1;
231 else
232 id = 0;
233 id = pdev->id - id;
234
d1c6b4fe
MB		 235 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
236
fded2f4f 237 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
d1c6b4fe
MB		 238 if (ldo == NULL) {
239 dev_err(&pdev->dev, "Unable to allocate private data\n");
240 return -ENOMEM;
241 }
242
243 ldo->wm831x = wm831x;
244
5656098e 245 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
d1c6b4fe 246 if (res == NULL) {
5656098e 247 dev_err(&pdev->dev, "No REG resource\n");
d1c6b4fe
MB		 248 ret = -EINVAL;
249 goto err;
250 }
251 ldo->base = res->start;
252
253 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
254 ldo->desc.name = ldo->name;
f1aba13f
MB		 255
256 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
257 "LDO%dVDD", id + 1);
258 ldo->desc.supply_name = ldo->supply_name;
259
d1c6b4fe
MB		 260 ldo->desc.id = id;
261 ldo->desc.type = REGULATOR_VOLTAGE;
5ff26a14 262 ldo->desc.n_voltages = 32;
d1c6b4fe
MB		 263 ldo->desc.ops = &wm831x_gp_ldo_ops;
264 ldo->desc.owner = THIS_MODULE;
ac663b47
MB		 265 ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
266 ldo->desc.vsel_mask = WM831X_LDO1_ON_VSEL_MASK;
ca8c361b
MB		 267 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
268 ldo->desc.enable_mask = 1 << id;
22c5fb6a
MB		 269 ldo->desc.bypass_reg = ldo->base;
270 ldo->desc.bypass_mask = WM831X_LDO1_SWI;
5ff26a14
MB		 271 ldo->desc.linear_ranges = wm831x_gp_ldo_ranges;
272 ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_gp_ldo_ranges);
d1c6b4fe 273
c172708d 274 config.dev = pdev->dev.parent;
b7ca8788
MB		 275 if (pdata)
276 config.init_data = pdata->ldo[id];
c172708d 277 config.driver_data = ldo;
ac663b47 278 config.regmap = wm831x->regmap;
c172708d
MB		 279
280 ldo->regulator = regulator_register(&ldo->desc, &config);
d1c6b4fe
MB		 281 if (IS_ERR(ldo->regulator)) {
282 ret = PTR_ERR(ldo->regulator);
283 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
284 id + 1, ret);
285 goto err;
286 }
287
cd99758b 288 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
dfda9c27
MB		 289 ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq,
290 IRQF_TRIGGER_RISING, ldo->name,
291 ldo);
d1c6b4fe
MB		 292 if (ret != 0) {
293 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
294 irq, ret);
295 goto err_regulator;
296 }
297
298 platform_set_drvdata(pdev, ldo);
299
300 return 0;
301
302err_regulator:
303 regulator_unregister(ldo->regulator);
304err:
d1c6b4fe
MB		 305 return ret;
306}
307
8dc995f5 308static int wm831x_gp_ldo_remove(struct platform_device *pdev)
d1c6b4fe
MB		 309{
310 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
d1c6b4fe 311
cd99758b
MB		 312 free_irq(wm831x_irq(ldo->wm831x,
313 platform_get_irq_byname(pdev, "UV")), ldo);
d1c6b4fe 314 regulator_unregister(ldo->regulator);
d1c6b4fe
MB		 315
316 return 0;
317}
318
319static struct platform_driver wm831x_gp_ldo_driver = {
320 .probe = wm831x_gp_ldo_probe,
5eb9f2b9 321 .remove = wm831x_gp_ldo_remove,
d1c6b4fe
MB		 322 .driver = {
323 .name = "wm831x-ldo",
eb66d565 324 .owner = THIS_MODULE,
d1c6b4fe
MB		 325 },
326};
327
328/*
329 * Analogue LDOs
330 */
331
5ff26a14 332static const struct regulator_linear_range wm831x_aldo_ranges[] = {
e277e656
AL		 333 { .min_uV = 1000000, .min_sel = 0, .max_sel = 12, .uV_step = 50000 },
334 { .min_uV = 1700000, .min_sel = 13, .max_sel = 31, .uV_step = 100000 },
5ff26a14 335};
d1c6b4fe
MB		 336
337static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev,
338 int uV)
339{
340 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
0a479689
AL		 341 struct wm831x *wm831x = ldo->wm831x;
342 int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
343
5ff26a14 344 sel = regulator_map_voltage_linear_range(rdev, uV, uV);
0a479689
AL		 345 if (sel < 0)
346 return sel;
d1c6b4fe 347
0a479689 348 return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, sel);
d1c6b4fe
MB		 349}
350
d1c6b4fe
MB		 351static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev)
352{
353 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
354 struct wm831x *wm831x = ldo->wm831x;
355 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
6f17c652 356 int ret;
d1c6b4fe
MB		 357
358 ret = wm831x_reg_read(wm831x, on_reg);
359 if (ret < 0)
360 return 0;
361
362 if (ret & WM831X_LDO7_ON_MODE)
363 return REGULATOR_MODE_IDLE;
364 else
365 return REGULATOR_MODE_NORMAL;
366}
367
368static int wm831x_aldo_set_mode(struct regulator_dev *rdev,
369 unsigned int mode)
370{
371 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
372 struct wm831x *wm831x = ldo->wm831x;
d1c6b4fe
MB		 373 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
374 int ret;
375
376
377 switch (mode) {
378 case REGULATOR_MODE_NORMAL:
e841a36a 379 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, 0);
d1c6b4fe
MB		 380 if (ret < 0)
381 return ret;
382 break;
383
384 case REGULATOR_MODE_IDLE:
e841a36a 385 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE,
d1c6b4fe
MB		 386 WM831X_LDO7_ON_MODE);
387 if (ret < 0)
388 return ret;
389 break;
390
391 default:
392 return -EINVAL;
393 }
394
395 return 0;
396}
397
398static int wm831x_aldo_get_status(struct regulator_dev *rdev)
399{
400 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
401 struct wm831x *wm831x = ldo->wm831x;
402 int mask = 1 << rdev_get_id(rdev);
403 int ret;
404
405 /* Is the regulator on? */
406 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
407 if (ret < 0)
408 return ret;
409 if (!(ret & mask))
410 return REGULATOR_STATUS_OFF;
411
412 /* Is it reporting under voltage? */
413 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
363506cd
AL		 414 if (ret < 0)
415 return ret;
d1c6b4fe
MB		 416 if (ret & mask)
417 return REGULATOR_STATUS_ERROR;
418
419 ret = wm831x_aldo_get_mode(rdev);
420 if (ret < 0)
421 return ret;
422 else
423 return regulator_mode_to_status(ret);
424}
425
426static struct regulator_ops wm831x_aldo_ops = {
5ff26a14
MB		 427 .list_voltage = regulator_list_voltage_linear_range,
428 .map_voltage = regulator_map_voltage_linear_range,
ac663b47 429 .get_voltage_sel = regulator_get_voltage_sel_regmap,
0a479689 430 .set_voltage_sel = regulator_set_voltage_sel_regmap,
d1c6b4fe
MB		 431 .set_suspend_voltage = wm831x_aldo_set_suspend_voltage,
432 .get_mode = wm831x_aldo_get_mode,
433 .set_mode = wm831x_aldo_set_mode,
434 .get_status = wm831x_aldo_get_status,
22c5fb6a
MB		 435 .set_bypass = regulator_set_bypass_regmap,
436 .get_bypass = regulator_get_bypass_regmap,
d1c6b4fe 437
ca8c361b
MB		 438 .is_enabled = regulator_is_enabled_regmap,
439 .enable = regulator_enable_regmap,
440 .disable = regulator_disable_regmap,
d1c6b4fe
MB		 441};
442
a5023574 443static int wm831x_aldo_probe(struct platform_device *pdev)
d1c6b4fe
MB		 444{
445 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
dff91d0b 446 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
c172708d 447 struct regulator_config config = { };
137a6354 448 int id;
d1c6b4fe
MB		 449 struct wm831x_ldo *ldo;
450 struct resource *res;
451 int ret, irq;
452
137a6354
MB		 453 if (pdata && pdata->wm831x_num)
454 id = (pdata->wm831x_num * 10) + 1;
455 else
456 id = 0;
457 id = pdev->id - id;
458
d1c6b4fe
MB		 459 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
460
fded2f4f 461 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
d1c6b4fe
MB		 462 if (ldo == NULL) {
463 dev_err(&pdev->dev, "Unable to allocate private data\n");
464 return -ENOMEM;
465 }
466
467 ldo->wm831x = wm831x;
468
5656098e 469 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
d1c6b4fe 470 if (res == NULL) {
5656098e 471 dev_err(&pdev->dev, "No REG resource\n");
d1c6b4fe
MB		 472 ret = -EINVAL;
473 goto err;
474 }
475 ldo->base = res->start;
476
477 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
478 ldo->desc.name = ldo->name;
f1aba13f
MB		 479
480 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
481 "LDO%dVDD", id + 1);
482 ldo->desc.supply_name = ldo->supply_name;
483
d1c6b4fe
MB		 484 ldo->desc.id = id;
485 ldo->desc.type = REGULATOR_VOLTAGE;
5ff26a14
MB		 486 ldo->desc.n_voltages = 32;
487 ldo->desc.linear_ranges = wm831x_aldo_ranges;
488 ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_aldo_ranges);
d1c6b4fe
MB		 489 ldo->desc.ops = &wm831x_aldo_ops;
490 ldo->desc.owner = THIS_MODULE;
ac663b47
MB		 491 ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
492 ldo->desc.vsel_mask = WM831X_LDO7_ON_VSEL_MASK;
ca8c361b
MB		 493 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
494 ldo->desc.enable_mask = 1 << id;
22c5fb6a
MB		 495 ldo->desc.bypass_reg = ldo->base;
496 ldo->desc.bypass_mask = WM831X_LDO7_SWI;
d1c6b4fe 497
c172708d 498 config.dev = pdev->dev.parent;
b7ca8788
MB		 499 if (pdata)
500 config.init_data = pdata->ldo[id];
c172708d 501 config.driver_data = ldo;
ac663b47 502 config.regmap = wm831x->regmap;
c172708d
MB		 503
504 ldo->regulator = regulator_register(&ldo->desc, &config);
d1c6b4fe
MB		 505 if (IS_ERR(ldo->regulator)) {
506 ret = PTR_ERR(ldo->regulator);
507 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
508 id + 1, ret);
509 goto err;
510 }
511
cd99758b 512 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
dfda9c27
MB		 513 ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq,
514 IRQF_TRIGGER_RISING, ldo->name, ldo);
d1c6b4fe
MB		 515 if (ret != 0) {
516 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
517 irq, ret);
518 goto err_regulator;
519 }
520
521 platform_set_drvdata(pdev, ldo);
522
523 return 0;
524
525err_regulator:
526 regulator_unregister(ldo->regulator);
527err:
d1c6b4fe
MB		 528 return ret;
529}
530
8dc995f5 531static int wm831x_aldo_remove(struct platform_device *pdev)
d1c6b4fe
MB		 532{
533 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
d1c6b4fe 534
cd99758b
MB		 535 free_irq(wm831x_irq(ldo->wm831x, platform_get_irq_byname(pdev, "UV")),
536 ldo);
d1c6b4fe 537 regulator_unregister(ldo->regulator);
d1c6b4fe
MB		 538
539 return 0;
540}
541
542static struct platform_driver wm831x_aldo_driver = {
543 .probe = wm831x_aldo_probe,
5eb9f2b9 544 .remove = wm831x_aldo_remove,
d1c6b4fe
MB		 545 .driver = {
546 .name = "wm831x-aldo",
eb66d565 547 .owner = THIS_MODULE,
d1c6b4fe
MB		 548 },
549};
550
551/*
552 * Alive LDO
553 */
554
555#define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf
556
d1c6b4fe
MB		 557static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev,
558 int uV)
559{
560 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
0a479689
AL		 561 struct wm831x *wm831x = ldo->wm831x;
562 int sel, reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL;
563
564 sel = regulator_map_voltage_linear(rdev, uV, uV);
565 if (sel < 0)
566 return sel;
d1c6b4fe 567
0a479689 568 return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, sel);
d1c6b4fe
MB		 569}
570
d1c6b4fe
MB		 571static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev)
572{
573 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
574 struct wm831x *wm831x = ldo->wm831x;
575 int mask = 1 << rdev_get_id(rdev);
576 int ret;
577
578 /* Is the regulator on? */
579 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
580 if (ret < 0)
581 return ret;
582 if (ret & mask)
583 return REGULATOR_STATUS_ON;
584 else
585 return REGULATOR_STATUS_OFF;
586}
587
588static struct regulator_ops wm831x_alive_ldo_ops = {
d31e954e 589 .list_voltage = regulator_list_voltage_linear,
c2543b5f 590 .map_voltage = regulator_map_voltage_linear,
ac663b47 591 .get_voltage_sel = regulator_get_voltage_sel_regmap,
0a479689 592 .set_voltage_sel = regulator_set_voltage_sel_regmap,
d1c6b4fe
MB		 593 .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage,
594 .get_status = wm831x_alive_ldo_get_status,
595
ca8c361b
MB		 596 .is_enabled = regulator_is_enabled_regmap,
597 .enable = regulator_enable_regmap,
598 .disable = regulator_disable_regmap,
d1c6b4fe
MB		 599};
600
a5023574 601static int wm831x_alive_ldo_probe(struct platform_device *pdev)
d1c6b4fe
MB		 602{
603 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
dff91d0b 604 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
c172708d 605 struct regulator_config config = { };
137a6354 606 int id;
d1c6b4fe
MB		 607 struct wm831x_ldo *ldo;
608 struct resource *res;
609 int ret;
610
137a6354
MB		 611 if (pdata && pdata->wm831x_num)
612 id = (pdata->wm831x_num * 10) + 1;
613 else
614 id = 0;
615 id = pdev->id - id;
616
617
d1c6b4fe
MB		 618 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
619
fded2f4f 620 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
d1c6b4fe
MB		 621 if (ldo == NULL) {
622 dev_err(&pdev->dev, "Unable to allocate private data\n");
623 return -ENOMEM;
624 }
625
626 ldo->wm831x = wm831x;
627
5656098e 628 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
d1c6b4fe 629 if (res == NULL) {
5656098e 630 dev_err(&pdev->dev, "No REG resource\n");
d1c6b4fe
MB		 631 ret = -EINVAL;
632 goto err;
633 }
634 ldo->base = res->start;
635
636 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
637 ldo->desc.name = ldo->name;
f1aba13f
MB		 638
639 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
640 "LDO%dVDD", id + 1);
641 ldo->desc.supply_name = ldo->supply_name;
642
d1c6b4fe
MB		 643 ldo->desc.id = id;
644 ldo->desc.type = REGULATOR_VOLTAGE;
645 ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1;
646 ldo->desc.ops = &wm831x_alive_ldo_ops;
647 ldo->desc.owner = THIS_MODULE;
ac663b47
MB		 648 ldo->desc.vsel_reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
649 ldo->desc.vsel_mask = WM831X_LDO11_ON_VSEL_MASK;
ca8c361b
MB		 650 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
651 ldo->desc.enable_mask = 1 << id;
d31e954e
MB		 652 ldo->desc.min_uV = 800000;
653 ldo->desc.uV_step = 50000;
eefaa3c6 654 ldo->desc.enable_time = 1000;
d1c6b4fe 655
c172708d 656 config.dev = pdev->dev.parent;
b7ca8788
MB		 657 if (pdata)
658 config.init_data = pdata->ldo[id];
c172708d 659 config.driver_data = ldo;
ac663b47 660 config.regmap = wm831x->regmap;
c172708d
MB		 661
662 ldo->regulator = regulator_register(&ldo->desc, &config);
d1c6b4fe
MB		 663 if (IS_ERR(ldo->regulator)) {
664 ret = PTR_ERR(ldo->regulator);
665 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
666 id + 1, ret);
667 goto err;
668 }
669
670 platform_set_drvdata(pdev, ldo);
671
672 return 0;
673
674err:
d1c6b4fe
MB		 675 return ret;
676}
677
8dc995f5 678static int wm831x_alive_ldo_remove(struct platform_device *pdev)
d1c6b4fe
MB		 679{
680 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
681
682 regulator_unregister(ldo->regulator);
d1c6b4fe
MB		 683
684 return 0;
685}
686
687static struct platform_driver wm831x_alive_ldo_driver = {
688 .probe = wm831x_alive_ldo_probe,
5eb9f2b9 689 .remove = wm831x_alive_ldo_remove,
d1c6b4fe
MB		 690 .driver = {
691 .name = "wm831x-alive-ldo",
eb66d565 692 .owner = THIS_MODULE,
d1c6b4fe
MB		 693 },
694};
695
696static int __init wm831x_ldo_init(void)
697{
698 int ret;
699
700 ret = platform_driver_register(&wm831x_gp_ldo_driver);
701 if (ret != 0)
702 pr_err("Failed to register WM831x GP LDO driver: %d\n", ret);
703
704 ret = platform_driver_register(&wm831x_aldo_driver);
705 if (ret != 0)
706 pr_err("Failed to register WM831x ALDO driver: %d\n", ret);
707
708 ret = platform_driver_register(&wm831x_alive_ldo_driver);
709 if (ret != 0)
710 pr_err("Failed to register WM831x alive LDO driver: %d\n",
711 ret);
712
713 return 0;
714}
715subsys_initcall(wm831x_ldo_init);
716
717static void __exit wm831x_ldo_exit(void)
718{
719 platform_driver_unregister(&wm831x_alive_ldo_driver);
720 platform_driver_unregister(&wm831x_aldo_driver);
721 platform_driver_unregister(&wm831x_gp_ldo_driver);
722}
723module_exit(wm831x_ldo_exit);
724
725/* Module information */
726MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
727MODULE_DESCRIPTION("WM831x LDO driver");
728MODULE_LICENSE("GPL");
729MODULE_ALIAS("platform:wm831x-ldo");
730MODULE_ALIAS("platform:wm831x-aldo");
731MODULE_ALIAS("platform:wm831x-aliveldo");
Linux kernel - Deliverables
This page took 0.308423 seconds and 5 git commands to generate.