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Commit | Line | Data |
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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); | |
363506cd AL |
208 | if (ret < 0) |
209 | return ret; | |
d1c6b4fe MB |
210 | if (ret & mask) |
211 | return REGULATOR_STATUS_ERROR; | |
212 | ||
213 | ret = wm831x_gp_ldo_get_mode(rdev); | |
214 | if (ret < 0) | |
215 | return ret; | |
216 | else | |
217 | return regulator_mode_to_status(ret); | |
218 | } | |
219 | ||
220 | static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev, | |
221 | int input_uV, | |
222 | int output_uV, int load_uA) | |
223 | { | |
224 | if (load_uA < 20000) | |
225 | return REGULATOR_MODE_STANDBY; | |
226 | if (load_uA < 50000) | |
227 | return REGULATOR_MODE_IDLE; | |
228 | return REGULATOR_MODE_NORMAL; | |
229 | } | |
230 | ||
231 | ||
232 | static struct regulator_ops wm831x_gp_ldo_ops = { | |
233 | .list_voltage = wm831x_gp_ldo_list_voltage, | |
0a479689 | 234 | .map_voltage = wm831x_gp_ldo_map_voltage, |
ac663b47 | 235 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
0a479689 | 236 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
d1c6b4fe MB |
237 | .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage, |
238 | .get_mode = wm831x_gp_ldo_get_mode, | |
239 | .set_mode = wm831x_gp_ldo_set_mode, | |
240 | .get_status = wm831x_gp_ldo_get_status, | |
241 | .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode, | |
22c5fb6a MB |
242 | .get_bypass = regulator_get_bypass_regmap, |
243 | .set_bypass = regulator_set_bypass_regmap, | |
d1c6b4fe | 244 | |
ca8c361b MB |
245 | .is_enabled = regulator_is_enabled_regmap, |
246 | .enable = regulator_enable_regmap, | |
247 | .disable = regulator_disable_regmap, | |
d1c6b4fe MB |
248 | }; |
249 | ||
250 | static __devinit int wm831x_gp_ldo_probe(struct platform_device *pdev) | |
251 | { | |
252 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
253 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
c172708d | 254 | struct regulator_config config = { }; |
137a6354 | 255 | int id; |
d1c6b4fe MB |
256 | struct wm831x_ldo *ldo; |
257 | struct resource *res; | |
258 | int ret, irq; | |
259 | ||
137a6354 MB |
260 | if (pdata && pdata->wm831x_num) |
261 | id = (pdata->wm831x_num * 10) + 1; | |
262 | else | |
263 | id = 0; | |
264 | id = pdev->id - id; | |
265 | ||
d1c6b4fe MB |
266 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
267 | ||
fded2f4f | 268 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); |
d1c6b4fe MB |
269 | if (ldo == NULL) { |
270 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
271 | return -ENOMEM; | |
272 | } | |
273 | ||
274 | ldo->wm831x = wm831x; | |
275 | ||
5656098e | 276 | res = platform_get_resource(pdev, IORESOURCE_REG, 0); |
d1c6b4fe | 277 | if (res == NULL) { |
5656098e | 278 | dev_err(&pdev->dev, "No REG resource\n"); |
d1c6b4fe MB |
279 | ret = -EINVAL; |
280 | goto err; | |
281 | } | |
282 | ldo->base = res->start; | |
283 | ||
284 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
285 | ldo->desc.name = ldo->name; | |
f1aba13f MB |
286 | |
287 | snprintf(ldo->supply_name, sizeof(ldo->supply_name), | |
288 | "LDO%dVDD", id + 1); | |
289 | ldo->desc.supply_name = ldo->supply_name; | |
290 | ||
d1c6b4fe MB |
291 | ldo->desc.id = id; |
292 | ldo->desc.type = REGULATOR_VOLTAGE; | |
293 | ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1; | |
294 | ldo->desc.ops = &wm831x_gp_ldo_ops; | |
295 | ldo->desc.owner = THIS_MODULE; | |
ac663b47 MB |
296 | ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
297 | ldo->desc.vsel_mask = WM831X_LDO1_ON_VSEL_MASK; | |
ca8c361b MB |
298 | ldo->desc.enable_reg = WM831X_LDO_ENABLE; |
299 | ldo->desc.enable_mask = 1 << id; | |
22c5fb6a MB |
300 | ldo->desc.bypass_reg = ldo->base; |
301 | ldo->desc.bypass_mask = WM831X_LDO1_SWI; | |
d1c6b4fe | 302 | |
c172708d | 303 | config.dev = pdev->dev.parent; |
b7ca8788 MB |
304 | if (pdata) |
305 | config.init_data = pdata->ldo[id]; | |
c172708d | 306 | config.driver_data = ldo; |
ac663b47 | 307 | config.regmap = wm831x->regmap; |
c172708d MB |
308 | |
309 | ldo->regulator = regulator_register(&ldo->desc, &config); | |
d1c6b4fe MB |
310 | if (IS_ERR(ldo->regulator)) { |
311 | ret = PTR_ERR(ldo->regulator); | |
312 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
313 | id + 1, ret); | |
314 | goto err; | |
315 | } | |
316 | ||
cd99758b | 317 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); |
dfda9c27 MB |
318 | ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq, |
319 | IRQF_TRIGGER_RISING, ldo->name, | |
320 | ldo); | |
d1c6b4fe MB |
321 | if (ret != 0) { |
322 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
323 | irq, ret); | |
324 | goto err_regulator; | |
325 | } | |
326 | ||
327 | platform_set_drvdata(pdev, ldo); | |
328 | ||
329 | return 0; | |
330 | ||
331 | err_regulator: | |
332 | regulator_unregister(ldo->regulator); | |
333 | err: | |
d1c6b4fe MB |
334 | return ret; |
335 | } | |
336 | ||
337 | static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev) | |
338 | { | |
339 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
d1c6b4fe | 340 | |
eb66d565 DT |
341 | platform_set_drvdata(pdev, NULL); |
342 | ||
cd99758b MB |
343 | free_irq(wm831x_irq(ldo->wm831x, |
344 | platform_get_irq_byname(pdev, "UV")), ldo); | |
d1c6b4fe | 345 | regulator_unregister(ldo->regulator); |
d1c6b4fe MB |
346 | |
347 | return 0; | |
348 | } | |
349 | ||
350 | static struct platform_driver wm831x_gp_ldo_driver = { | |
351 | .probe = wm831x_gp_ldo_probe, | |
5eb9f2b9 | 352 | .remove = wm831x_gp_ldo_remove, |
d1c6b4fe MB |
353 | .driver = { |
354 | .name = "wm831x-ldo", | |
eb66d565 | 355 | .owner = THIS_MODULE, |
d1c6b4fe MB |
356 | }, |
357 | }; | |
358 | ||
359 | /* | |
360 | * Analogue LDOs | |
361 | */ | |
362 | ||
363 | ||
364 | #define WM831X_ALDO_SELECTOR_LOW 0xc | |
365 | #define WM831X_ALDO_MAX_SELECTOR 0x1f | |
366 | ||
367 | static int wm831x_aldo_list_voltage(struct regulator_dev *rdev, | |
368 | unsigned int selector) | |
369 | { | |
370 | /* 1-1.6V in 50mV steps */ | |
371 | if (selector <= WM831X_ALDO_SELECTOR_LOW) | |
372 | return 1000000 + (selector * 50000); | |
6085d4d9 | 373 | /* 1.7-3.5V in 100mV steps */ |
d1c6b4fe MB |
374 | if (selector <= WM831X_ALDO_MAX_SELECTOR) |
375 | return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW) | |
376 | * 100000); | |
377 | return -EINVAL; | |
378 | } | |
379 | ||
0a479689 AL |
380 | static int wm831x_aldo_map_voltage(struct regulator_dev *rdev, |
381 | int min_uV, int max_uV) | |
d1c6b4fe | 382 | { |
0a479689 | 383 | int volt, vsel; |
d1c6b4fe MB |
384 | |
385 | if (min_uV < 1000000) | |
386 | vsel = 0; | |
387 | else if (min_uV < 1700000) | |
388 | vsel = ((min_uV - 1000000) / 50000); | |
389 | else | |
390 | vsel = ((min_uV - 1700000) / 100000) | |
391 | + WM831X_ALDO_SELECTOR_LOW + 1; | |
392 | ||
0a479689 AL |
393 | volt = wm831x_aldo_list_voltage(rdev, vsel); |
394 | if (volt < min_uV || volt > max_uV) | |
d1c6b4fe MB |
395 | return -EINVAL; |
396 | ||
0a479689 | 397 | return vsel; |
d1c6b4fe | 398 | |
d1c6b4fe MB |
399 | } |
400 | ||
401 | static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev, | |
402 | int uV) | |
403 | { | |
404 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
0a479689 AL |
405 | struct wm831x *wm831x = ldo->wm831x; |
406 | int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; | |
407 | ||
408 | sel = wm831x_aldo_map_voltage(rdev, uV, uV); | |
409 | if (sel < 0) | |
410 | return sel; | |
d1c6b4fe | 411 | |
0a479689 | 412 | return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, sel); |
d1c6b4fe MB |
413 | } |
414 | ||
d1c6b4fe MB |
415 | static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev) |
416 | { | |
417 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
418 | struct wm831x *wm831x = ldo->wm831x; | |
419 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
6f17c652 | 420 | int ret; |
d1c6b4fe MB |
421 | |
422 | ret = wm831x_reg_read(wm831x, on_reg); | |
423 | if (ret < 0) | |
424 | return 0; | |
425 | ||
426 | if (ret & WM831X_LDO7_ON_MODE) | |
427 | return REGULATOR_MODE_IDLE; | |
428 | else | |
429 | return REGULATOR_MODE_NORMAL; | |
430 | } | |
431 | ||
432 | static int wm831x_aldo_set_mode(struct regulator_dev *rdev, | |
433 | unsigned int mode) | |
434 | { | |
435 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
436 | struct wm831x *wm831x = ldo->wm831x; | |
d1c6b4fe MB |
437 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
438 | int ret; | |
439 | ||
440 | ||
441 | switch (mode) { | |
442 | case REGULATOR_MODE_NORMAL: | |
e841a36a | 443 | ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, 0); |
d1c6b4fe MB |
444 | if (ret < 0) |
445 | return ret; | |
446 | break; | |
447 | ||
448 | case REGULATOR_MODE_IDLE: | |
e841a36a | 449 | ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, |
d1c6b4fe MB |
450 | WM831X_LDO7_ON_MODE); |
451 | if (ret < 0) | |
452 | return ret; | |
453 | break; | |
454 | ||
455 | default: | |
456 | return -EINVAL; | |
457 | } | |
458 | ||
459 | return 0; | |
460 | } | |
461 | ||
462 | static int wm831x_aldo_get_status(struct regulator_dev *rdev) | |
463 | { | |
464 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
465 | struct wm831x *wm831x = ldo->wm831x; | |
466 | int mask = 1 << rdev_get_id(rdev); | |
467 | int ret; | |
468 | ||
469 | /* Is the regulator on? */ | |
470 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
471 | if (ret < 0) | |
472 | return ret; | |
473 | if (!(ret & mask)) | |
474 | return REGULATOR_STATUS_OFF; | |
475 | ||
476 | /* Is it reporting under voltage? */ | |
477 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); | |
363506cd AL |
478 | if (ret < 0) |
479 | return ret; | |
d1c6b4fe MB |
480 | if (ret & mask) |
481 | return REGULATOR_STATUS_ERROR; | |
482 | ||
483 | ret = wm831x_aldo_get_mode(rdev); | |
484 | if (ret < 0) | |
485 | return ret; | |
486 | else | |
487 | return regulator_mode_to_status(ret); | |
488 | } | |
489 | ||
490 | static struct regulator_ops wm831x_aldo_ops = { | |
491 | .list_voltage = wm831x_aldo_list_voltage, | |
0a479689 | 492 | .map_voltage = wm831x_aldo_map_voltage, |
ac663b47 | 493 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
0a479689 | 494 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
d1c6b4fe MB |
495 | .set_suspend_voltage = wm831x_aldo_set_suspend_voltage, |
496 | .get_mode = wm831x_aldo_get_mode, | |
497 | .set_mode = wm831x_aldo_set_mode, | |
498 | .get_status = wm831x_aldo_get_status, | |
22c5fb6a MB |
499 | .set_bypass = regulator_set_bypass_regmap, |
500 | .get_bypass = regulator_get_bypass_regmap, | |
d1c6b4fe | 501 | |
ca8c361b MB |
502 | .is_enabled = regulator_is_enabled_regmap, |
503 | .enable = regulator_enable_regmap, | |
504 | .disable = regulator_disable_regmap, | |
d1c6b4fe MB |
505 | }; |
506 | ||
507 | static __devinit int wm831x_aldo_probe(struct platform_device *pdev) | |
508 | { | |
509 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
510 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
c172708d | 511 | struct regulator_config config = { }; |
137a6354 | 512 | int id; |
d1c6b4fe MB |
513 | struct wm831x_ldo *ldo; |
514 | struct resource *res; | |
515 | int ret, irq; | |
516 | ||
137a6354 MB |
517 | if (pdata && pdata->wm831x_num) |
518 | id = (pdata->wm831x_num * 10) + 1; | |
519 | else | |
520 | id = 0; | |
521 | id = pdev->id - id; | |
522 | ||
d1c6b4fe MB |
523 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
524 | ||
fded2f4f | 525 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); |
d1c6b4fe MB |
526 | if (ldo == NULL) { |
527 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
528 | return -ENOMEM; | |
529 | } | |
530 | ||
531 | ldo->wm831x = wm831x; | |
532 | ||
5656098e | 533 | res = platform_get_resource(pdev, IORESOURCE_REG, 0); |
d1c6b4fe | 534 | if (res == NULL) { |
5656098e | 535 | dev_err(&pdev->dev, "No REG resource\n"); |
d1c6b4fe MB |
536 | ret = -EINVAL; |
537 | goto err; | |
538 | } | |
539 | ldo->base = res->start; | |
540 | ||
541 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
542 | ldo->desc.name = ldo->name; | |
f1aba13f MB |
543 | |
544 | snprintf(ldo->supply_name, sizeof(ldo->supply_name), | |
545 | "LDO%dVDD", id + 1); | |
546 | ldo->desc.supply_name = ldo->supply_name; | |
547 | ||
d1c6b4fe MB |
548 | ldo->desc.id = id; |
549 | ldo->desc.type = REGULATOR_VOLTAGE; | |
550 | ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1; | |
551 | ldo->desc.ops = &wm831x_aldo_ops; | |
552 | ldo->desc.owner = THIS_MODULE; | |
ac663b47 MB |
553 | ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
554 | ldo->desc.vsel_mask = WM831X_LDO7_ON_VSEL_MASK; | |
ca8c361b MB |
555 | ldo->desc.enable_reg = WM831X_LDO_ENABLE; |
556 | ldo->desc.enable_mask = 1 << id; | |
22c5fb6a MB |
557 | ldo->desc.bypass_reg = ldo->base; |
558 | ldo->desc.bypass_mask = WM831X_LDO7_SWI; | |
d1c6b4fe | 559 | |
c172708d | 560 | config.dev = pdev->dev.parent; |
b7ca8788 MB |
561 | if (pdata) |
562 | config.init_data = pdata->ldo[id]; | |
c172708d | 563 | config.driver_data = ldo; |
ac663b47 | 564 | config.regmap = wm831x->regmap; |
c172708d MB |
565 | |
566 | ldo->regulator = regulator_register(&ldo->desc, &config); | |
d1c6b4fe MB |
567 | if (IS_ERR(ldo->regulator)) { |
568 | ret = PTR_ERR(ldo->regulator); | |
569 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
570 | id + 1, ret); | |
571 | goto err; | |
572 | } | |
573 | ||
cd99758b | 574 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); |
dfda9c27 MB |
575 | ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq, |
576 | IRQF_TRIGGER_RISING, ldo->name, ldo); | |
d1c6b4fe MB |
577 | if (ret != 0) { |
578 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
579 | irq, ret); | |
580 | goto err_regulator; | |
581 | } | |
582 | ||
583 | platform_set_drvdata(pdev, ldo); | |
584 | ||
585 | return 0; | |
586 | ||
587 | err_regulator: | |
588 | regulator_unregister(ldo->regulator); | |
589 | err: | |
d1c6b4fe MB |
590 | return ret; |
591 | } | |
592 | ||
593 | static __devexit int wm831x_aldo_remove(struct platform_device *pdev) | |
594 | { | |
595 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
d1c6b4fe | 596 | |
cd99758b MB |
597 | free_irq(wm831x_irq(ldo->wm831x, platform_get_irq_byname(pdev, "UV")), |
598 | ldo); | |
d1c6b4fe | 599 | regulator_unregister(ldo->regulator); |
d1c6b4fe MB |
600 | |
601 | return 0; | |
602 | } | |
603 | ||
604 | static struct platform_driver wm831x_aldo_driver = { | |
605 | .probe = wm831x_aldo_probe, | |
5eb9f2b9 | 606 | .remove = wm831x_aldo_remove, |
d1c6b4fe MB |
607 | .driver = { |
608 | .name = "wm831x-aldo", | |
eb66d565 | 609 | .owner = THIS_MODULE, |
d1c6b4fe MB |
610 | }, |
611 | }; | |
612 | ||
613 | /* | |
614 | * Alive LDO | |
615 | */ | |
616 | ||
617 | #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf | |
618 | ||
d1c6b4fe MB |
619 | static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev, |
620 | int uV) | |
621 | { | |
622 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
0a479689 AL |
623 | struct wm831x *wm831x = ldo->wm831x; |
624 | int sel, reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL; | |
625 | ||
626 | sel = regulator_map_voltage_linear(rdev, uV, uV); | |
627 | if (sel < 0) | |
628 | return sel; | |
d1c6b4fe | 629 | |
0a479689 | 630 | return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, sel); |
d1c6b4fe MB |
631 | } |
632 | ||
d1c6b4fe MB |
633 | static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev) |
634 | { | |
635 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
636 | struct wm831x *wm831x = ldo->wm831x; | |
637 | int mask = 1 << rdev_get_id(rdev); | |
638 | int ret; | |
639 | ||
640 | /* Is the regulator on? */ | |
641 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
642 | if (ret < 0) | |
643 | return ret; | |
644 | if (ret & mask) | |
645 | return REGULATOR_STATUS_ON; | |
646 | else | |
647 | return REGULATOR_STATUS_OFF; | |
648 | } | |
649 | ||
650 | static struct regulator_ops wm831x_alive_ldo_ops = { | |
d31e954e | 651 | .list_voltage = regulator_list_voltage_linear, |
c2543b5f | 652 | .map_voltage = regulator_map_voltage_linear, |
ac663b47 | 653 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
0a479689 | 654 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
d1c6b4fe MB |
655 | .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage, |
656 | .get_status = wm831x_alive_ldo_get_status, | |
657 | ||
ca8c361b MB |
658 | .is_enabled = regulator_is_enabled_regmap, |
659 | .enable = regulator_enable_regmap, | |
660 | .disable = regulator_disable_regmap, | |
d1c6b4fe MB |
661 | }; |
662 | ||
663 | static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev) | |
664 | { | |
665 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
666 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
c172708d | 667 | struct regulator_config config = { }; |
137a6354 | 668 | int id; |
d1c6b4fe MB |
669 | struct wm831x_ldo *ldo; |
670 | struct resource *res; | |
671 | int ret; | |
672 | ||
137a6354 MB |
673 | if (pdata && pdata->wm831x_num) |
674 | id = (pdata->wm831x_num * 10) + 1; | |
675 | else | |
676 | id = 0; | |
677 | id = pdev->id - id; | |
678 | ||
679 | ||
d1c6b4fe MB |
680 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
681 | ||
fded2f4f | 682 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); |
d1c6b4fe MB |
683 | if (ldo == NULL) { |
684 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
685 | return -ENOMEM; | |
686 | } | |
687 | ||
688 | ldo->wm831x = wm831x; | |
689 | ||
5656098e | 690 | res = platform_get_resource(pdev, IORESOURCE_REG, 0); |
d1c6b4fe | 691 | if (res == NULL) { |
5656098e | 692 | dev_err(&pdev->dev, "No REG resource\n"); |
d1c6b4fe MB |
693 | ret = -EINVAL; |
694 | goto err; | |
695 | } | |
696 | ldo->base = res->start; | |
697 | ||
698 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
699 | ldo->desc.name = ldo->name; | |
f1aba13f MB |
700 | |
701 | snprintf(ldo->supply_name, sizeof(ldo->supply_name), | |
702 | "LDO%dVDD", id + 1); | |
703 | ldo->desc.supply_name = ldo->supply_name; | |
704 | ||
d1c6b4fe MB |
705 | ldo->desc.id = id; |
706 | ldo->desc.type = REGULATOR_VOLTAGE; | |
707 | ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1; | |
708 | ldo->desc.ops = &wm831x_alive_ldo_ops; | |
709 | ldo->desc.owner = THIS_MODULE; | |
ac663b47 MB |
710 | ldo->desc.vsel_reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; |
711 | ldo->desc.vsel_mask = WM831X_LDO11_ON_VSEL_MASK; | |
ca8c361b MB |
712 | ldo->desc.enable_reg = WM831X_LDO_ENABLE; |
713 | ldo->desc.enable_mask = 1 << id; | |
d31e954e MB |
714 | ldo->desc.min_uV = 800000; |
715 | ldo->desc.uV_step = 50000; | |
eefaa3c6 | 716 | ldo->desc.enable_time = 1000; |
d1c6b4fe | 717 | |
c172708d | 718 | config.dev = pdev->dev.parent; |
b7ca8788 MB |
719 | if (pdata) |
720 | config.init_data = pdata->ldo[id]; | |
c172708d | 721 | config.driver_data = ldo; |
ac663b47 | 722 | config.regmap = wm831x->regmap; |
c172708d MB |
723 | |
724 | ldo->regulator = regulator_register(&ldo->desc, &config); | |
d1c6b4fe MB |
725 | if (IS_ERR(ldo->regulator)) { |
726 | ret = PTR_ERR(ldo->regulator); | |
727 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
728 | id + 1, ret); | |
729 | goto err; | |
730 | } | |
731 | ||
732 | platform_set_drvdata(pdev, ldo); | |
733 | ||
734 | return 0; | |
735 | ||
736 | err: | |
d1c6b4fe MB |
737 | return ret; |
738 | } | |
739 | ||
740 | static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev) | |
741 | { | |
742 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
743 | ||
744 | regulator_unregister(ldo->regulator); | |
d1c6b4fe MB |
745 | |
746 | return 0; | |
747 | } | |
748 | ||
749 | static struct platform_driver wm831x_alive_ldo_driver = { | |
750 | .probe = wm831x_alive_ldo_probe, | |
5eb9f2b9 | 751 | .remove = wm831x_alive_ldo_remove, |
d1c6b4fe MB |
752 | .driver = { |
753 | .name = "wm831x-alive-ldo", | |
eb66d565 | 754 | .owner = THIS_MODULE, |
d1c6b4fe MB |
755 | }, |
756 | }; | |
757 | ||
758 | static int __init wm831x_ldo_init(void) | |
759 | { | |
760 | int ret; | |
761 | ||
762 | ret = platform_driver_register(&wm831x_gp_ldo_driver); | |
763 | if (ret != 0) | |
764 | pr_err("Failed to register WM831x GP LDO driver: %d\n", ret); | |
765 | ||
766 | ret = platform_driver_register(&wm831x_aldo_driver); | |
767 | if (ret != 0) | |
768 | pr_err("Failed to register WM831x ALDO driver: %d\n", ret); | |
769 | ||
770 | ret = platform_driver_register(&wm831x_alive_ldo_driver); | |
771 | if (ret != 0) | |
772 | pr_err("Failed to register WM831x alive LDO driver: %d\n", | |
773 | ret); | |
774 | ||
775 | return 0; | |
776 | } | |
777 | subsys_initcall(wm831x_ldo_init); | |
778 | ||
779 | static void __exit wm831x_ldo_exit(void) | |
780 | { | |
781 | platform_driver_unregister(&wm831x_alive_ldo_driver); | |
782 | platform_driver_unregister(&wm831x_aldo_driver); | |
783 | platform_driver_unregister(&wm831x_gp_ldo_driver); | |
784 | } | |
785 | module_exit(wm831x_ldo_exit); | |
786 | ||
787 | /* Module information */ | |
788 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
789 | MODULE_DESCRIPTION("WM831x LDO driver"); | |
790 | MODULE_LICENSE("GPL"); | |
791 | MODULE_ALIAS("platform:wm831x-ldo"); | |
792 | MODULE_ALIAS("platform:wm831x-aldo"); | |
793 | MODULE_ALIAS("platform:wm831x-aliveldo"); |