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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 | #include <linux/slab.h> | |
23 | ||
24 | #include <linux/mfd/wm831x/core.h> | |
25 | #include <linux/mfd/wm831x/regulator.h> | |
26 | #include <linux/mfd/wm831x/pdata.h> | |
27 | ||
28 | #define WM831X_LDO_MAX_NAME 9 | |
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]; | |
39 | char supply_name[WM831X_LDO_MAX_NAME]; | |
40 | struct regulator_desc desc; | |
41 | int base; | |
42 | struct wm831x *wm831x; | |
43 | struct regulator_dev *regulator; | |
44 | }; | |
45 | ||
46 | /* | |
47 | * Shared | |
48 | */ | |
49 | ||
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 | static const struct regulator_linear_range wm831x_gp_ldo_ranges[] = { | |
66 | REGULATOR_LINEAR_RANGE(900000, 0, 14, 50000), | |
67 | REGULATOR_LINEAR_RANGE(1700000, 15, 31, 100000), | |
68 | }; | |
69 | ||
70 | static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev, | |
71 | int uV) | |
72 | { | |
73 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
74 | struct wm831x *wm831x = ldo->wm831x; | |
75 | int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; | |
76 | ||
77 | sel = regulator_map_voltage_linear_range(rdev, uV, uV); | |
78 | if (sel < 0) | |
79 | return sel; | |
80 | ||
81 | return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, sel); | |
82 | } | |
83 | ||
84 | static 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; | |
90 | int ret; | |
91 | ||
92 | ret = wm831x_reg_read(wm831x, on_reg); | |
93 | if (ret < 0) | |
94 | return ret; | |
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) | |
101 | return ret; | |
102 | ||
103 | if (ret & WM831X_LDO1_LP_MODE) | |
104 | return REGULATOR_MODE_STANDBY; | |
105 | else | |
106 | return REGULATOR_MODE_IDLE; | |
107 | } | |
108 | ||
109 | static 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, | |
129 | WM831X_LDO1_LP_MODE, 0); | |
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; | |
138 | break; | |
139 | ||
140 | case REGULATOR_MODE_STANDBY: | |
141 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
142 | WM831X_LDO1_LP_MODE, | |
143 | WM831X_LDO1_LP_MODE); | |
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 | ||
161 | static 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); | |
177 | if (ret < 0) | |
178 | return ret; | |
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 | ||
189 | static 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 | ||
201 | static const struct regulator_ops wm831x_gp_ldo_ops = { | |
202 | .list_voltage = regulator_list_voltage_linear_range, | |
203 | .map_voltage = regulator_map_voltage_linear_range, | |
204 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
205 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
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, | |
211 | .get_bypass = regulator_get_bypass_regmap, | |
212 | .set_bypass = regulator_set_bypass_regmap, | |
213 | ||
214 | .is_enabled = regulator_is_enabled_regmap, | |
215 | .enable = regulator_enable_regmap, | |
216 | .disable = regulator_disable_regmap, | |
217 | }; | |
218 | ||
219 | static int wm831x_gp_ldo_probe(struct platform_device *pdev) | |
220 | { | |
221 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
222 | struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev); | |
223 | struct regulator_config config = { }; | |
224 | int id; | |
225 | struct wm831x_ldo *ldo; | |
226 | struct resource *res; | |
227 | int ret, irq; | |
228 | ||
229 | if (pdata && pdata->wm831x_num) | |
230 | id = (pdata->wm831x_num * 10) + 1; | |
231 | else | |
232 | id = 0; | |
233 | id = pdev->id - id; | |
234 | ||
235 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
236 | ||
237 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); | |
238 | if (!ldo) | |
239 | return -ENOMEM; | |
240 | ||
241 | ldo->wm831x = wm831x; | |
242 | ||
243 | res = platform_get_resource(pdev, IORESOURCE_REG, 0); | |
244 | if (res == NULL) { | |
245 | dev_err(&pdev->dev, "No REG resource\n"); | |
246 | ret = -EINVAL; | |
247 | goto err; | |
248 | } | |
249 | ldo->base = res->start; | |
250 | ||
251 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
252 | ldo->desc.name = ldo->name; | |
253 | ||
254 | snprintf(ldo->supply_name, sizeof(ldo->supply_name), | |
255 | "LDO%dVDD", id + 1); | |
256 | ldo->desc.supply_name = ldo->supply_name; | |
257 | ||
258 | ldo->desc.id = id; | |
259 | ldo->desc.type = REGULATOR_VOLTAGE; | |
260 | ldo->desc.n_voltages = 32; | |
261 | ldo->desc.ops = &wm831x_gp_ldo_ops; | |
262 | ldo->desc.owner = THIS_MODULE; | |
263 | ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
264 | ldo->desc.vsel_mask = WM831X_LDO1_ON_VSEL_MASK; | |
265 | ldo->desc.enable_reg = WM831X_LDO_ENABLE; | |
266 | ldo->desc.enable_mask = 1 << id; | |
267 | ldo->desc.bypass_reg = ldo->base; | |
268 | ldo->desc.bypass_mask = WM831X_LDO1_SWI; | |
269 | ldo->desc.linear_ranges = wm831x_gp_ldo_ranges; | |
270 | ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_gp_ldo_ranges); | |
271 | ||
272 | config.dev = pdev->dev.parent; | |
273 | if (pdata) | |
274 | config.init_data = pdata->ldo[id]; | |
275 | config.driver_data = ldo; | |
276 | config.regmap = wm831x->regmap; | |
277 | ||
278 | ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc, | |
279 | &config); | |
280 | if (IS_ERR(ldo->regulator)) { | |
281 | ret = PTR_ERR(ldo->regulator); | |
282 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
283 | id + 1, ret); | |
284 | goto err; | |
285 | } | |
286 | ||
287 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); | |
288 | ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, | |
289 | wm831x_ldo_uv_irq, | |
290 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, | |
291 | ldo->name, | |
292 | ldo); | |
293 | if (ret != 0) { | |
294 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
295 | irq, ret); | |
296 | goto err; | |
297 | } | |
298 | ||
299 | platform_set_drvdata(pdev, ldo); | |
300 | ||
301 | return 0; | |
302 | ||
303 | err: | |
304 | return ret; | |
305 | } | |
306 | ||
307 | static struct platform_driver wm831x_gp_ldo_driver = { | |
308 | .probe = wm831x_gp_ldo_probe, | |
309 | .driver = { | |
310 | .name = "wm831x-ldo", | |
311 | }, | |
312 | }; | |
313 | ||
314 | /* | |
315 | * Analogue LDOs | |
316 | */ | |
317 | ||
318 | static const struct regulator_linear_range wm831x_aldo_ranges[] = { | |
319 | REGULATOR_LINEAR_RANGE(1000000, 0, 12, 50000), | |
320 | REGULATOR_LINEAR_RANGE(1700000, 13, 31, 100000), | |
321 | }; | |
322 | ||
323 | static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev, | |
324 | int uV) | |
325 | { | |
326 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
327 | struct wm831x *wm831x = ldo->wm831x; | |
328 | int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; | |
329 | ||
330 | sel = regulator_map_voltage_linear_range(rdev, uV, uV); | |
331 | if (sel < 0) | |
332 | return sel; | |
333 | ||
334 | return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, sel); | |
335 | } | |
336 | ||
337 | static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev) | |
338 | { | |
339 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
340 | struct wm831x *wm831x = ldo->wm831x; | |
341 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
342 | int ret; | |
343 | ||
344 | ret = wm831x_reg_read(wm831x, on_reg); | |
345 | if (ret < 0) | |
346 | return 0; | |
347 | ||
348 | if (ret & WM831X_LDO7_ON_MODE) | |
349 | return REGULATOR_MODE_IDLE; | |
350 | else | |
351 | return REGULATOR_MODE_NORMAL; | |
352 | } | |
353 | ||
354 | static int wm831x_aldo_set_mode(struct regulator_dev *rdev, | |
355 | unsigned int mode) | |
356 | { | |
357 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
358 | struct wm831x *wm831x = ldo->wm831x; | |
359 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
360 | int ret; | |
361 | ||
362 | ||
363 | switch (mode) { | |
364 | case REGULATOR_MODE_NORMAL: | |
365 | ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, 0); | |
366 | if (ret < 0) | |
367 | return ret; | |
368 | break; | |
369 | ||
370 | case REGULATOR_MODE_IDLE: | |
371 | ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, | |
372 | WM831X_LDO7_ON_MODE); | |
373 | if (ret < 0) | |
374 | return ret; | |
375 | break; | |
376 | ||
377 | default: | |
378 | return -EINVAL; | |
379 | } | |
380 | ||
381 | return 0; | |
382 | } | |
383 | ||
384 | static int wm831x_aldo_get_status(struct regulator_dev *rdev) | |
385 | { | |
386 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
387 | struct wm831x *wm831x = ldo->wm831x; | |
388 | int mask = 1 << rdev_get_id(rdev); | |
389 | int ret; | |
390 | ||
391 | /* Is the regulator on? */ | |
392 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
393 | if (ret < 0) | |
394 | return ret; | |
395 | if (!(ret & mask)) | |
396 | return REGULATOR_STATUS_OFF; | |
397 | ||
398 | /* Is it reporting under voltage? */ | |
399 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); | |
400 | if (ret < 0) | |
401 | return ret; | |
402 | if (ret & mask) | |
403 | return REGULATOR_STATUS_ERROR; | |
404 | ||
405 | ret = wm831x_aldo_get_mode(rdev); | |
406 | if (ret < 0) | |
407 | return ret; | |
408 | else | |
409 | return regulator_mode_to_status(ret); | |
410 | } | |
411 | ||
412 | static const struct regulator_ops wm831x_aldo_ops = { | |
413 | .list_voltage = regulator_list_voltage_linear_range, | |
414 | .map_voltage = regulator_map_voltage_linear_range, | |
415 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
416 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
417 | .set_suspend_voltage = wm831x_aldo_set_suspend_voltage, | |
418 | .get_mode = wm831x_aldo_get_mode, | |
419 | .set_mode = wm831x_aldo_set_mode, | |
420 | .get_status = wm831x_aldo_get_status, | |
421 | .set_bypass = regulator_set_bypass_regmap, | |
422 | .get_bypass = regulator_get_bypass_regmap, | |
423 | ||
424 | .is_enabled = regulator_is_enabled_regmap, | |
425 | .enable = regulator_enable_regmap, | |
426 | .disable = regulator_disable_regmap, | |
427 | }; | |
428 | ||
429 | static int wm831x_aldo_probe(struct platform_device *pdev) | |
430 | { | |
431 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
432 | struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev); | |
433 | struct regulator_config config = { }; | |
434 | int id; | |
435 | struct wm831x_ldo *ldo; | |
436 | struct resource *res; | |
437 | int ret, irq; | |
438 | ||
439 | if (pdata && pdata->wm831x_num) | |
440 | id = (pdata->wm831x_num * 10) + 1; | |
441 | else | |
442 | id = 0; | |
443 | id = pdev->id - id; | |
444 | ||
445 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
446 | ||
447 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); | |
448 | if (!ldo) | |
449 | return -ENOMEM; | |
450 | ||
451 | ldo->wm831x = wm831x; | |
452 | ||
453 | res = platform_get_resource(pdev, IORESOURCE_REG, 0); | |
454 | if (res == NULL) { | |
455 | dev_err(&pdev->dev, "No REG resource\n"); | |
456 | ret = -EINVAL; | |
457 | goto err; | |
458 | } | |
459 | ldo->base = res->start; | |
460 | ||
461 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
462 | ldo->desc.name = ldo->name; | |
463 | ||
464 | snprintf(ldo->supply_name, sizeof(ldo->supply_name), | |
465 | "LDO%dVDD", id + 1); | |
466 | ldo->desc.supply_name = ldo->supply_name; | |
467 | ||
468 | ldo->desc.id = id; | |
469 | ldo->desc.type = REGULATOR_VOLTAGE; | |
470 | ldo->desc.n_voltages = 32; | |
471 | ldo->desc.linear_ranges = wm831x_aldo_ranges; | |
472 | ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_aldo_ranges); | |
473 | ldo->desc.ops = &wm831x_aldo_ops; | |
474 | ldo->desc.owner = THIS_MODULE; | |
475 | ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
476 | ldo->desc.vsel_mask = WM831X_LDO7_ON_VSEL_MASK; | |
477 | ldo->desc.enable_reg = WM831X_LDO_ENABLE; | |
478 | ldo->desc.enable_mask = 1 << id; | |
479 | ldo->desc.bypass_reg = ldo->base; | |
480 | ldo->desc.bypass_mask = WM831X_LDO7_SWI; | |
481 | ||
482 | config.dev = pdev->dev.parent; | |
483 | if (pdata) | |
484 | config.init_data = pdata->ldo[id]; | |
485 | config.driver_data = ldo; | |
486 | config.regmap = wm831x->regmap; | |
487 | ||
488 | ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc, | |
489 | &config); | |
490 | if (IS_ERR(ldo->regulator)) { | |
491 | ret = PTR_ERR(ldo->regulator); | |
492 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
493 | id + 1, ret); | |
494 | goto err; | |
495 | } | |
496 | ||
497 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); | |
498 | ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, | |
499 | wm831x_ldo_uv_irq, | |
500 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, | |
501 | ldo->name, ldo); | |
502 | if (ret != 0) { | |
503 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
504 | irq, ret); | |
505 | goto err; | |
506 | } | |
507 | ||
508 | platform_set_drvdata(pdev, ldo); | |
509 | ||
510 | return 0; | |
511 | ||
512 | err: | |
513 | return ret; | |
514 | } | |
515 | ||
516 | static struct platform_driver wm831x_aldo_driver = { | |
517 | .probe = wm831x_aldo_probe, | |
518 | .driver = { | |
519 | .name = "wm831x-aldo", | |
520 | }, | |
521 | }; | |
522 | ||
523 | /* | |
524 | * Alive LDO | |
525 | */ | |
526 | ||
527 | #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf | |
528 | ||
529 | static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev, | |
530 | int uV) | |
531 | { | |
532 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
533 | struct wm831x *wm831x = ldo->wm831x; | |
534 | int sel, reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL; | |
535 | ||
536 | sel = regulator_map_voltage_linear(rdev, uV, uV); | |
537 | if (sel < 0) | |
538 | return sel; | |
539 | ||
540 | return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, sel); | |
541 | } | |
542 | ||
543 | static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev) | |
544 | { | |
545 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
546 | struct wm831x *wm831x = ldo->wm831x; | |
547 | int mask = 1 << rdev_get_id(rdev); | |
548 | int ret; | |
549 | ||
550 | /* Is the regulator on? */ | |
551 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
552 | if (ret < 0) | |
553 | return ret; | |
554 | if (ret & mask) | |
555 | return REGULATOR_STATUS_ON; | |
556 | else | |
557 | return REGULATOR_STATUS_OFF; | |
558 | } | |
559 | ||
560 | static const struct regulator_ops wm831x_alive_ldo_ops = { | |
561 | .list_voltage = regulator_list_voltage_linear, | |
562 | .map_voltage = regulator_map_voltage_linear, | |
563 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
564 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
565 | .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage, | |
566 | .get_status = wm831x_alive_ldo_get_status, | |
567 | ||
568 | .is_enabled = regulator_is_enabled_regmap, | |
569 | .enable = regulator_enable_regmap, | |
570 | .disable = regulator_disable_regmap, | |
571 | }; | |
572 | ||
573 | static int wm831x_alive_ldo_probe(struct platform_device *pdev) | |
574 | { | |
575 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
576 | struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev); | |
577 | struct regulator_config config = { }; | |
578 | int id; | |
579 | struct wm831x_ldo *ldo; | |
580 | struct resource *res; | |
581 | int ret; | |
582 | ||
583 | if (pdata && pdata->wm831x_num) | |
584 | id = (pdata->wm831x_num * 10) + 1; | |
585 | else | |
586 | id = 0; | |
587 | id = pdev->id - id; | |
588 | ||
589 | ||
590 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
591 | ||
592 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); | |
593 | if (!ldo) | |
594 | return -ENOMEM; | |
595 | ||
596 | ldo->wm831x = wm831x; | |
597 | ||
598 | res = platform_get_resource(pdev, IORESOURCE_REG, 0); | |
599 | if (res == NULL) { | |
600 | dev_err(&pdev->dev, "No REG resource\n"); | |
601 | ret = -EINVAL; | |
602 | goto err; | |
603 | } | |
604 | ldo->base = res->start; | |
605 | ||
606 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
607 | ldo->desc.name = ldo->name; | |
608 | ||
609 | snprintf(ldo->supply_name, sizeof(ldo->supply_name), | |
610 | "LDO%dVDD", id + 1); | |
611 | ldo->desc.supply_name = ldo->supply_name; | |
612 | ||
613 | ldo->desc.id = id; | |
614 | ldo->desc.type = REGULATOR_VOLTAGE; | |
615 | ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1; | |
616 | ldo->desc.ops = &wm831x_alive_ldo_ops; | |
617 | ldo->desc.owner = THIS_MODULE; | |
618 | ldo->desc.vsel_reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; | |
619 | ldo->desc.vsel_mask = WM831X_LDO11_ON_VSEL_MASK; | |
620 | ldo->desc.enable_reg = WM831X_LDO_ENABLE; | |
621 | ldo->desc.enable_mask = 1 << id; | |
622 | ldo->desc.min_uV = 800000; | |
623 | ldo->desc.uV_step = 50000; | |
624 | ldo->desc.enable_time = 1000; | |
625 | ||
626 | config.dev = pdev->dev.parent; | |
627 | if (pdata) | |
628 | config.init_data = pdata->ldo[id]; | |
629 | config.driver_data = ldo; | |
630 | config.regmap = wm831x->regmap; | |
631 | ||
632 | ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc, | |
633 | &config); | |
634 | if (IS_ERR(ldo->regulator)) { | |
635 | ret = PTR_ERR(ldo->regulator); | |
636 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
637 | id + 1, ret); | |
638 | goto err; | |
639 | } | |
640 | ||
641 | platform_set_drvdata(pdev, ldo); | |
642 | ||
643 | return 0; | |
644 | ||
645 | err: | |
646 | return ret; | |
647 | } | |
648 | ||
649 | static struct platform_driver wm831x_alive_ldo_driver = { | |
650 | .probe = wm831x_alive_ldo_probe, | |
651 | .driver = { | |
652 | .name = "wm831x-alive-ldo", | |
653 | }, | |
654 | }; | |
655 | ||
656 | static struct platform_driver * const drivers[] = { | |
657 | &wm831x_gp_ldo_driver, | |
658 | &wm831x_aldo_driver, | |
659 | &wm831x_alive_ldo_driver, | |
660 | }; | |
661 | ||
662 | static int __init wm831x_ldo_init(void) | |
663 | { | |
664 | return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); | |
665 | } | |
666 | subsys_initcall(wm831x_ldo_init); | |
667 | ||
668 | static void __exit wm831x_ldo_exit(void) | |
669 | { | |
670 | platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); | |
671 | } | |
672 | module_exit(wm831x_ldo_exit); | |
673 | ||
674 | /* Module information */ | |
675 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
676 | MODULE_DESCRIPTION("WM831x LDO driver"); | |
677 | MODULE_LICENSE("GPL"); | |
678 | MODULE_ALIAS("platform:wm831x-ldo"); | |
679 | MODULE_ALIAS("platform:wm831x-aldo"); | |
680 | MODULE_ALIAS("platform:wm831x-aliveldo"); |