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> | |
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 | ||
37 | struct 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 |
50 | static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data) |
51 | { | |
52 | struct wm831x_ldo *ldo = data; | |
53 | ||
54 | regulator_notifier_call_chain(ldo->regulator, | |
55 | REGULATOR_EVENT_UNDER_VOLTAGE, | |
56 | NULL); | |
57 | ||
58 | return IRQ_HANDLED; | |
59 | } | |
60 | ||
61 | /* | |
62 | * General purpose LDOs | |
63 | */ | |
64 | ||
65 | #define WM831X_GP_LDO_SELECTOR_LOW 0xe | |
66 | #define WM831X_GP_LDO_MAX_SELECTOR 0x1f | |
67 | ||
68 | static int wm831x_gp_ldo_list_voltage(struct regulator_dev *rdev, | |
69 | unsigned int selector) | |
70 | { | |
71 | /* 0.9-1.6V in 50mV steps */ | |
72 | if (selector <= WM831X_GP_LDO_SELECTOR_LOW) | |
73 | return 900000 + (selector * 50000); | |
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 | ||
0a479689 AL |
81 | static int wm831x_gp_ldo_map_voltage(struct regulator_dev *rdev, |
82 | int min_uV, int max_uV) | |
d1c6b4fe | 83 | { |
0a479689 | 84 | int volt, vsel; |
d1c6b4fe MB |
85 | |
86 | if (min_uV < 900000) | |
87 | vsel = 0; | |
88 | else if (min_uV < 1700000) | |
89 | vsel = ((min_uV - 900000) / 50000); | |
90 | else | |
91 | vsel = ((min_uV - 1700000) / 100000) | |
92 | + WM831X_GP_LDO_SELECTOR_LOW + 1; | |
93 | ||
0a479689 AL |
94 | volt = wm831x_gp_ldo_list_voltage(rdev, vsel); |
95 | if (volt < min_uV || volt > max_uV) | |
d1c6b4fe MB |
96 | return -EINVAL; |
97 | ||
0a479689 | 98 | return vsel; |
d1c6b4fe MB |
99 | } |
100 | ||
101 | static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev, | |
102 | int uV) | |
103 | { | |
104 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
0a479689 AL |
105 | struct wm831x *wm831x = ldo->wm831x; |
106 | int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; | |
d1c6b4fe | 107 | |
0a479689 AL |
108 | sel = wm831x_gp_ldo_map_voltage(rdev, uV, uV); |
109 | if (sel < 0) | |
110 | return sel; | |
111 | ||
112 | return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, sel); | |
d1c6b4fe MB |
113 | } |
114 | ||
d1c6b4fe MB |
115 | static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev) |
116 | { | |
117 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
118 | struct wm831x *wm831x = ldo->wm831x; | |
119 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
120 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
9a767d43 | 121 | int ret; |
d1c6b4fe MB |
122 | |
123 | ret = wm831x_reg_read(wm831x, on_reg); | |
124 | if (ret < 0) | |
9a767d43 | 125 | return ret; |
d1c6b4fe MB |
126 | |
127 | if (!(ret & WM831X_LDO1_ON_MODE)) | |
128 | return REGULATOR_MODE_NORMAL; | |
129 | ||
130 | ret = wm831x_reg_read(wm831x, ctrl_reg); | |
131 | if (ret < 0) | |
9a767d43 | 132 | return ret; |
d1c6b4fe MB |
133 | |
134 | if (ret & WM831X_LDO1_LP_MODE) | |
135 | return REGULATOR_MODE_STANDBY; | |
136 | else | |
137 | return REGULATOR_MODE_IDLE; | |
138 | } | |
139 | ||
140 | static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev, | |
141 | unsigned int mode) | |
142 | { | |
143 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
144 | struct wm831x *wm831x = ldo->wm831x; | |
145 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
146 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
147 | int ret; | |
148 | ||
149 | ||
150 | switch (mode) { | |
151 | case REGULATOR_MODE_NORMAL: | |
152 | ret = wm831x_set_bits(wm831x, on_reg, | |
153 | WM831X_LDO1_ON_MODE, 0); | |
154 | if (ret < 0) | |
155 | return ret; | |
156 | break; | |
157 | ||
158 | case REGULATOR_MODE_IDLE: | |
159 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
e260999c | 160 | WM831X_LDO1_LP_MODE, 0); |
d1c6b4fe MB |
161 | if (ret < 0) |
162 | return ret; | |
163 | ||
164 | ret = wm831x_set_bits(wm831x, on_reg, | |
165 | WM831X_LDO1_ON_MODE, | |
166 | WM831X_LDO1_ON_MODE); | |
167 | if (ret < 0) | |
168 | return ret; | |
e260999c | 169 | break; |
d1c6b4fe MB |
170 | |
171 | case REGULATOR_MODE_STANDBY: | |
172 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
e260999c AL |
173 | WM831X_LDO1_LP_MODE, |
174 | WM831X_LDO1_LP_MODE); | |
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; | |
183 | break; | |
184 | ||
185 | default: | |
186 | return -EINVAL; | |
187 | } | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev) | |
193 | { | |
194 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
195 | struct wm831x *wm831x = ldo->wm831x; | |
196 | int mask = 1 << rdev_get_id(rdev); | |
197 | int ret; | |
198 | ||
199 | /* Is the regulator on? */ | |
200 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
201 | if (ret < 0) | |
202 | return ret; | |
203 | if (!(ret & mask)) | |
204 | return REGULATOR_STATUS_OFF; | |
205 | ||
206 | /* Is it reporting under voltage? */ | |
207 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); | |
208 | if (ret & mask) | |
209 | return REGULATOR_STATUS_ERROR; | |
210 | ||
211 | ret = wm831x_gp_ldo_get_mode(rdev); | |
212 | if (ret < 0) | |
213 | return ret; | |
214 | else | |
215 | return regulator_mode_to_status(ret); | |
216 | } | |
217 | ||
218 | static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev, | |
219 | int input_uV, | |
220 | int output_uV, int load_uA) | |
221 | { | |
222 | if (load_uA < 20000) | |
223 | return REGULATOR_MODE_STANDBY; | |
224 | if (load_uA < 50000) | |
225 | return REGULATOR_MODE_IDLE; | |
226 | return REGULATOR_MODE_NORMAL; | |
227 | } | |
228 | ||
229 | ||
230 | static struct regulator_ops wm831x_gp_ldo_ops = { | |
231 | .list_voltage = wm831x_gp_ldo_list_voltage, | |
0a479689 | 232 | .map_voltage = wm831x_gp_ldo_map_voltage, |
ac663b47 | 233 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
0a479689 | 234 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
d1c6b4fe MB |
235 | .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage, |
236 | .get_mode = wm831x_gp_ldo_get_mode, | |
237 | .set_mode = wm831x_gp_ldo_set_mode, | |
238 | .get_status = wm831x_gp_ldo_get_status, | |
239 | .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode, | |
240 | ||
ca8c361b MB |
241 | .is_enabled = regulator_is_enabled_regmap, |
242 | .enable = regulator_enable_regmap, | |
243 | .disable = regulator_disable_regmap, | |
d1c6b4fe MB |
244 | }; |
245 | ||
246 | static __devinit int wm831x_gp_ldo_probe(struct platform_device *pdev) | |
247 | { | |
248 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
249 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
c172708d | 250 | struct regulator_config config = { }; |
137a6354 | 251 | int id; |
d1c6b4fe MB |
252 | struct wm831x_ldo *ldo; |
253 | struct resource *res; | |
254 | int ret, irq; | |
255 | ||
137a6354 MB |
256 | if (pdata && pdata->wm831x_num) |
257 | id = (pdata->wm831x_num * 10) + 1; | |
258 | else | |
259 | id = 0; | |
260 | id = pdev->id - id; | |
261 | ||
d1c6b4fe MB |
262 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
263 | ||
fded2f4f | 264 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); |
d1c6b4fe MB |
265 | if (ldo == NULL) { |
266 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
267 | return -ENOMEM; | |
268 | } | |
269 | ||
270 | ldo->wm831x = wm831x; | |
271 | ||
272 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
273 | if (res == NULL) { | |
274 | dev_err(&pdev->dev, "No I/O resource\n"); | |
275 | ret = -EINVAL; | |
276 | goto err; | |
277 | } | |
278 | ldo->base = res->start; | |
279 | ||
280 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
281 | ldo->desc.name = ldo->name; | |
f1aba13f MB |
282 | |
283 | snprintf(ldo->supply_name, sizeof(ldo->supply_name), | |
284 | "LDO%dVDD", id + 1); | |
285 | ldo->desc.supply_name = ldo->supply_name; | |
286 | ||
d1c6b4fe MB |
287 | ldo->desc.id = id; |
288 | ldo->desc.type = REGULATOR_VOLTAGE; | |
289 | ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1; | |
290 | ldo->desc.ops = &wm831x_gp_ldo_ops; | |
291 | ldo->desc.owner = THIS_MODULE; | |
ac663b47 MB |
292 | ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
293 | ldo->desc.vsel_mask = WM831X_LDO1_ON_VSEL_MASK; | |
ca8c361b MB |
294 | ldo->desc.enable_reg = WM831X_LDO_ENABLE; |
295 | ldo->desc.enable_mask = 1 << id; | |
d1c6b4fe | 296 | |
c172708d | 297 | config.dev = pdev->dev.parent; |
b7ca8788 MB |
298 | if (pdata) |
299 | config.init_data = pdata->ldo[id]; | |
c172708d | 300 | config.driver_data = ldo; |
ac663b47 | 301 | config.regmap = wm831x->regmap; |
c172708d MB |
302 | |
303 | ldo->regulator = regulator_register(&ldo->desc, &config); | |
d1c6b4fe MB |
304 | if (IS_ERR(ldo->regulator)) { |
305 | ret = PTR_ERR(ldo->regulator); | |
306 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
307 | id + 1, ret); | |
308 | goto err; | |
309 | } | |
310 | ||
cd99758b | 311 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); |
dfda9c27 MB |
312 | ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq, |
313 | IRQF_TRIGGER_RISING, ldo->name, | |
314 | ldo); | |
d1c6b4fe MB |
315 | if (ret != 0) { |
316 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
317 | irq, ret); | |
318 | goto err_regulator; | |
319 | } | |
320 | ||
321 | platform_set_drvdata(pdev, ldo); | |
322 | ||
323 | return 0; | |
324 | ||
325 | err_regulator: | |
326 | regulator_unregister(ldo->regulator); | |
327 | err: | |
d1c6b4fe MB |
328 | return ret; |
329 | } | |
330 | ||
331 | static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev) | |
332 | { | |
333 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
d1c6b4fe | 334 | |
eb66d565 DT |
335 | platform_set_drvdata(pdev, NULL); |
336 | ||
cd99758b MB |
337 | free_irq(wm831x_irq(ldo->wm831x, |
338 | platform_get_irq_byname(pdev, "UV")), ldo); | |
d1c6b4fe | 339 | regulator_unregister(ldo->regulator); |
d1c6b4fe MB |
340 | |
341 | return 0; | |
342 | } | |
343 | ||
344 | static struct platform_driver wm831x_gp_ldo_driver = { | |
345 | .probe = wm831x_gp_ldo_probe, | |
346 | .remove = __devexit_p(wm831x_gp_ldo_remove), | |
347 | .driver = { | |
348 | .name = "wm831x-ldo", | |
eb66d565 | 349 | .owner = THIS_MODULE, |
d1c6b4fe MB |
350 | }, |
351 | }; | |
352 | ||
353 | /* | |
354 | * Analogue LDOs | |
355 | */ | |
356 | ||
357 | ||
358 | #define WM831X_ALDO_SELECTOR_LOW 0xc | |
359 | #define WM831X_ALDO_MAX_SELECTOR 0x1f | |
360 | ||
361 | static int wm831x_aldo_list_voltage(struct regulator_dev *rdev, | |
362 | unsigned int selector) | |
363 | { | |
364 | /* 1-1.6V in 50mV steps */ | |
365 | if (selector <= WM831X_ALDO_SELECTOR_LOW) | |
366 | return 1000000 + (selector * 50000); | |
6085d4d9 | 367 | /* 1.7-3.5V in 100mV steps */ |
d1c6b4fe MB |
368 | if (selector <= WM831X_ALDO_MAX_SELECTOR) |
369 | return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW) | |
370 | * 100000); | |
371 | return -EINVAL; | |
372 | } | |
373 | ||
0a479689 AL |
374 | static int wm831x_aldo_map_voltage(struct regulator_dev *rdev, |
375 | int min_uV, int max_uV) | |
d1c6b4fe | 376 | { |
0a479689 | 377 | int volt, vsel; |
d1c6b4fe MB |
378 | |
379 | if (min_uV < 1000000) | |
380 | vsel = 0; | |
381 | else if (min_uV < 1700000) | |
382 | vsel = ((min_uV - 1000000) / 50000); | |
383 | else | |
384 | vsel = ((min_uV - 1700000) / 100000) | |
385 | + WM831X_ALDO_SELECTOR_LOW + 1; | |
386 | ||
0a479689 AL |
387 | volt = wm831x_aldo_list_voltage(rdev, vsel); |
388 | if (volt < min_uV || volt > max_uV) | |
d1c6b4fe MB |
389 | return -EINVAL; |
390 | ||
0a479689 | 391 | return vsel; |
d1c6b4fe | 392 | |
d1c6b4fe MB |
393 | } |
394 | ||
395 | static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev, | |
396 | int uV) | |
397 | { | |
398 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
0a479689 AL |
399 | struct wm831x *wm831x = ldo->wm831x; |
400 | int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; | |
401 | ||
402 | sel = wm831x_aldo_map_voltage(rdev, uV, uV); | |
403 | if (sel < 0) | |
404 | return sel; | |
d1c6b4fe | 405 | |
0a479689 | 406 | return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, sel); |
d1c6b4fe MB |
407 | } |
408 | ||
d1c6b4fe MB |
409 | static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev) |
410 | { | |
411 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
412 | struct wm831x *wm831x = ldo->wm831x; | |
413 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
6f17c652 | 414 | int ret; |
d1c6b4fe MB |
415 | |
416 | ret = wm831x_reg_read(wm831x, on_reg); | |
417 | if (ret < 0) | |
418 | return 0; | |
419 | ||
420 | if (ret & WM831X_LDO7_ON_MODE) | |
421 | return REGULATOR_MODE_IDLE; | |
422 | else | |
423 | return REGULATOR_MODE_NORMAL; | |
424 | } | |
425 | ||
426 | static int wm831x_aldo_set_mode(struct regulator_dev *rdev, | |
427 | unsigned int mode) | |
428 | { | |
429 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
430 | struct wm831x *wm831x = ldo->wm831x; | |
d1c6b4fe MB |
431 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
432 | int ret; | |
433 | ||
434 | ||
435 | switch (mode) { | |
436 | case REGULATOR_MODE_NORMAL: | |
e841a36a | 437 | ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, 0); |
d1c6b4fe MB |
438 | if (ret < 0) |
439 | return ret; | |
440 | break; | |
441 | ||
442 | case REGULATOR_MODE_IDLE: | |
e841a36a | 443 | ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, |
d1c6b4fe MB |
444 | WM831X_LDO7_ON_MODE); |
445 | if (ret < 0) | |
446 | return ret; | |
447 | break; | |
448 | ||
449 | default: | |
450 | return -EINVAL; | |
451 | } | |
452 | ||
453 | return 0; | |
454 | } | |
455 | ||
456 | static int wm831x_aldo_get_status(struct regulator_dev *rdev) | |
457 | { | |
458 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
459 | struct wm831x *wm831x = ldo->wm831x; | |
460 | int mask = 1 << rdev_get_id(rdev); | |
461 | int ret; | |
462 | ||
463 | /* Is the regulator on? */ | |
464 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
465 | if (ret < 0) | |
466 | return ret; | |
467 | if (!(ret & mask)) | |
468 | return REGULATOR_STATUS_OFF; | |
469 | ||
470 | /* Is it reporting under voltage? */ | |
471 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); | |
472 | if (ret & mask) | |
473 | return REGULATOR_STATUS_ERROR; | |
474 | ||
475 | ret = wm831x_aldo_get_mode(rdev); | |
476 | if (ret < 0) | |
477 | return ret; | |
478 | else | |
479 | return regulator_mode_to_status(ret); | |
480 | } | |
481 | ||
482 | static struct regulator_ops wm831x_aldo_ops = { | |
483 | .list_voltage = wm831x_aldo_list_voltage, | |
0a479689 | 484 | .map_voltage = wm831x_aldo_map_voltage, |
ac663b47 | 485 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
0a479689 | 486 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
d1c6b4fe MB |
487 | .set_suspend_voltage = wm831x_aldo_set_suspend_voltage, |
488 | .get_mode = wm831x_aldo_get_mode, | |
489 | .set_mode = wm831x_aldo_set_mode, | |
490 | .get_status = wm831x_aldo_get_status, | |
491 | ||
ca8c361b MB |
492 | .is_enabled = regulator_is_enabled_regmap, |
493 | .enable = regulator_enable_regmap, | |
494 | .disable = regulator_disable_regmap, | |
d1c6b4fe MB |
495 | }; |
496 | ||
497 | static __devinit int wm831x_aldo_probe(struct platform_device *pdev) | |
498 | { | |
499 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
500 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
c172708d | 501 | struct regulator_config config = { }; |
137a6354 | 502 | int id; |
d1c6b4fe MB |
503 | struct wm831x_ldo *ldo; |
504 | struct resource *res; | |
505 | int ret, irq; | |
506 | ||
137a6354 MB |
507 | if (pdata && pdata->wm831x_num) |
508 | id = (pdata->wm831x_num * 10) + 1; | |
509 | else | |
510 | id = 0; | |
511 | id = pdev->id - id; | |
512 | ||
d1c6b4fe MB |
513 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
514 | ||
fded2f4f | 515 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); |
d1c6b4fe MB |
516 | if (ldo == NULL) { |
517 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
518 | return -ENOMEM; | |
519 | } | |
520 | ||
521 | ldo->wm831x = wm831x; | |
522 | ||
523 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
524 | if (res == NULL) { | |
525 | dev_err(&pdev->dev, "No I/O resource\n"); | |
526 | ret = -EINVAL; | |
527 | goto err; | |
528 | } | |
529 | ldo->base = res->start; | |
530 | ||
531 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
532 | ldo->desc.name = ldo->name; | |
f1aba13f MB |
533 | |
534 | snprintf(ldo->supply_name, sizeof(ldo->supply_name), | |
535 | "LDO%dVDD", id + 1); | |
536 | ldo->desc.supply_name = ldo->supply_name; | |
537 | ||
d1c6b4fe MB |
538 | ldo->desc.id = id; |
539 | ldo->desc.type = REGULATOR_VOLTAGE; | |
540 | ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1; | |
541 | ldo->desc.ops = &wm831x_aldo_ops; | |
542 | ldo->desc.owner = THIS_MODULE; | |
ac663b47 MB |
543 | ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
544 | ldo->desc.vsel_mask = WM831X_LDO7_ON_VSEL_MASK; | |
ca8c361b MB |
545 | ldo->desc.enable_reg = WM831X_LDO_ENABLE; |
546 | ldo->desc.enable_mask = 1 << id; | |
d1c6b4fe | 547 | |
c172708d | 548 | config.dev = pdev->dev.parent; |
b7ca8788 MB |
549 | if (pdata) |
550 | config.init_data = pdata->ldo[id]; | |
c172708d | 551 | config.driver_data = ldo; |
ac663b47 | 552 | config.regmap = wm831x->regmap; |
c172708d MB |
553 | |
554 | ldo->regulator = regulator_register(&ldo->desc, &config); | |
d1c6b4fe MB |
555 | if (IS_ERR(ldo->regulator)) { |
556 | ret = PTR_ERR(ldo->regulator); | |
557 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
558 | id + 1, ret); | |
559 | goto err; | |
560 | } | |
561 | ||
cd99758b | 562 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); |
dfda9c27 MB |
563 | ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq, |
564 | IRQF_TRIGGER_RISING, ldo->name, ldo); | |
d1c6b4fe MB |
565 | if (ret != 0) { |
566 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
567 | irq, ret); | |
568 | goto err_regulator; | |
569 | } | |
570 | ||
571 | platform_set_drvdata(pdev, ldo); | |
572 | ||
573 | return 0; | |
574 | ||
575 | err_regulator: | |
576 | regulator_unregister(ldo->regulator); | |
577 | err: | |
d1c6b4fe MB |
578 | return ret; |
579 | } | |
580 | ||
581 | static __devexit int wm831x_aldo_remove(struct platform_device *pdev) | |
582 | { | |
583 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
d1c6b4fe | 584 | |
cd99758b MB |
585 | free_irq(wm831x_irq(ldo->wm831x, platform_get_irq_byname(pdev, "UV")), |
586 | ldo); | |
d1c6b4fe | 587 | regulator_unregister(ldo->regulator); |
d1c6b4fe MB |
588 | |
589 | return 0; | |
590 | } | |
591 | ||
592 | static struct platform_driver wm831x_aldo_driver = { | |
593 | .probe = wm831x_aldo_probe, | |
594 | .remove = __devexit_p(wm831x_aldo_remove), | |
595 | .driver = { | |
596 | .name = "wm831x-aldo", | |
eb66d565 | 597 | .owner = THIS_MODULE, |
d1c6b4fe MB |
598 | }, |
599 | }; | |
600 | ||
601 | /* | |
602 | * Alive LDO | |
603 | */ | |
604 | ||
605 | #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf | |
606 | ||
d1c6b4fe MB |
607 | static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev, |
608 | int uV) | |
609 | { | |
610 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
0a479689 AL |
611 | struct wm831x *wm831x = ldo->wm831x; |
612 | int sel, reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL; | |
613 | ||
614 | sel = regulator_map_voltage_linear(rdev, uV, uV); | |
615 | if (sel < 0) | |
616 | return sel; | |
d1c6b4fe | 617 | |
0a479689 | 618 | return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, sel); |
d1c6b4fe MB |
619 | } |
620 | ||
d1c6b4fe MB |
621 | static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev) |
622 | { | |
623 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
624 | struct wm831x *wm831x = ldo->wm831x; | |
625 | int mask = 1 << rdev_get_id(rdev); | |
626 | int ret; | |
627 | ||
628 | /* Is the regulator on? */ | |
629 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
630 | if (ret < 0) | |
631 | return ret; | |
632 | if (ret & mask) | |
633 | return REGULATOR_STATUS_ON; | |
634 | else | |
635 | return REGULATOR_STATUS_OFF; | |
636 | } | |
637 | ||
638 | static struct regulator_ops wm831x_alive_ldo_ops = { | |
d31e954e | 639 | .list_voltage = regulator_list_voltage_linear, |
c2543b5f | 640 | .map_voltage = regulator_map_voltage_linear, |
ac663b47 | 641 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
0a479689 | 642 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
d1c6b4fe MB |
643 | .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage, |
644 | .get_status = wm831x_alive_ldo_get_status, | |
645 | ||
ca8c361b MB |
646 | .is_enabled = regulator_is_enabled_regmap, |
647 | .enable = regulator_enable_regmap, | |
648 | .disable = regulator_disable_regmap, | |
d1c6b4fe MB |
649 | }; |
650 | ||
651 | static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev) | |
652 | { | |
653 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
654 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
c172708d | 655 | struct regulator_config config = { }; |
137a6354 | 656 | int id; |
d1c6b4fe MB |
657 | struct wm831x_ldo *ldo; |
658 | struct resource *res; | |
659 | int ret; | |
660 | ||
137a6354 MB |
661 | if (pdata && pdata->wm831x_num) |
662 | id = (pdata->wm831x_num * 10) + 1; | |
663 | else | |
664 | id = 0; | |
665 | id = pdev->id - id; | |
666 | ||
667 | ||
d1c6b4fe MB |
668 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
669 | ||
fded2f4f | 670 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); |
d1c6b4fe MB |
671 | if (ldo == NULL) { |
672 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
673 | return -ENOMEM; | |
674 | } | |
675 | ||
676 | ldo->wm831x = wm831x; | |
677 | ||
678 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
679 | if (res == NULL) { | |
680 | dev_err(&pdev->dev, "No I/O resource\n"); | |
681 | ret = -EINVAL; | |
682 | goto err; | |
683 | } | |
684 | ldo->base = res->start; | |
685 | ||
686 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
687 | ldo->desc.name = ldo->name; | |
f1aba13f MB |
688 | |
689 | snprintf(ldo->supply_name, sizeof(ldo->supply_name), | |
690 | "LDO%dVDD", id + 1); | |
691 | ldo->desc.supply_name = ldo->supply_name; | |
692 | ||
d1c6b4fe MB |
693 | ldo->desc.id = id; |
694 | ldo->desc.type = REGULATOR_VOLTAGE; | |
695 | ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1; | |
696 | ldo->desc.ops = &wm831x_alive_ldo_ops; | |
697 | ldo->desc.owner = THIS_MODULE; | |
ac663b47 MB |
698 | ldo->desc.vsel_reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; |
699 | ldo->desc.vsel_mask = WM831X_LDO11_ON_VSEL_MASK; | |
ca8c361b MB |
700 | ldo->desc.enable_reg = WM831X_LDO_ENABLE; |
701 | ldo->desc.enable_mask = 1 << id; | |
d31e954e MB |
702 | ldo->desc.min_uV = 800000; |
703 | ldo->desc.uV_step = 50000; | |
eefaa3c6 | 704 | ldo->desc.enable_time = 1000; |
d1c6b4fe | 705 | |
c172708d | 706 | config.dev = pdev->dev.parent; |
b7ca8788 MB |
707 | if (pdata) |
708 | config.init_data = pdata->ldo[id]; | |
c172708d | 709 | config.driver_data = ldo; |
ac663b47 | 710 | config.regmap = wm831x->regmap; |
c172708d MB |
711 | |
712 | ldo->regulator = regulator_register(&ldo->desc, &config); | |
d1c6b4fe MB |
713 | if (IS_ERR(ldo->regulator)) { |
714 | ret = PTR_ERR(ldo->regulator); | |
715 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
716 | id + 1, ret); | |
717 | goto err; | |
718 | } | |
719 | ||
720 | platform_set_drvdata(pdev, ldo); | |
721 | ||
722 | return 0; | |
723 | ||
724 | err: | |
d1c6b4fe MB |
725 | return ret; |
726 | } | |
727 | ||
728 | static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev) | |
729 | { | |
730 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
731 | ||
732 | regulator_unregister(ldo->regulator); | |
d1c6b4fe MB |
733 | |
734 | return 0; | |
735 | } | |
736 | ||
737 | static struct platform_driver wm831x_alive_ldo_driver = { | |
738 | .probe = wm831x_alive_ldo_probe, | |
739 | .remove = __devexit_p(wm831x_alive_ldo_remove), | |
740 | .driver = { | |
741 | .name = "wm831x-alive-ldo", | |
eb66d565 | 742 | .owner = THIS_MODULE, |
d1c6b4fe MB |
743 | }, |
744 | }; | |
745 | ||
746 | static int __init wm831x_ldo_init(void) | |
747 | { | |
748 | int ret; | |
749 | ||
750 | ret = platform_driver_register(&wm831x_gp_ldo_driver); | |
751 | if (ret != 0) | |
752 | pr_err("Failed to register WM831x GP LDO driver: %d\n", ret); | |
753 | ||
754 | ret = platform_driver_register(&wm831x_aldo_driver); | |
755 | if (ret != 0) | |
756 | pr_err("Failed to register WM831x ALDO driver: %d\n", ret); | |
757 | ||
758 | ret = platform_driver_register(&wm831x_alive_ldo_driver); | |
759 | if (ret != 0) | |
760 | pr_err("Failed to register WM831x alive LDO driver: %d\n", | |
761 | ret); | |
762 | ||
763 | return 0; | |
764 | } | |
765 | subsys_initcall(wm831x_ldo_init); | |
766 | ||
767 | static void __exit wm831x_ldo_exit(void) | |
768 | { | |
769 | platform_driver_unregister(&wm831x_alive_ldo_driver); | |
770 | platform_driver_unregister(&wm831x_aldo_driver); | |
771 | platform_driver_unregister(&wm831x_gp_ldo_driver); | |
772 | } | |
773 | module_exit(wm831x_ldo_exit); | |
774 | ||
775 | /* Module information */ | |
776 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
777 | MODULE_DESCRIPTION("WM831x LDO driver"); | |
778 | MODULE_LICENSE("GPL"); | |
779 | MODULE_ALIAS("platform:wm831x-ldo"); | |
780 | MODULE_ALIAS("platform:wm831x-aldo"); | |
781 | MODULE_ALIAS("platform:wm831x-aliveldo"); |