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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 | ||
81 | static int wm831x_gp_ldo_set_voltage_int(struct regulator_dev *rdev, int reg, | |
3a93f2a9 MB |
82 | int min_uV, int max_uV, |
83 | unsigned *selector) | |
d1c6b4fe MB |
84 | { |
85 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
86 | struct wm831x *wm831x = ldo->wm831x; | |
87 | int vsel, ret; | |
88 | ||
89 | if (min_uV < 900000) | |
90 | vsel = 0; | |
91 | else if (min_uV < 1700000) | |
92 | vsel = ((min_uV - 900000) / 50000); | |
93 | else | |
94 | vsel = ((min_uV - 1700000) / 100000) | |
95 | + WM831X_GP_LDO_SELECTOR_LOW + 1; | |
96 | ||
97 | ret = wm831x_gp_ldo_list_voltage(rdev, vsel); | |
98 | if (ret < 0) | |
99 | return ret; | |
100 | if (ret < min_uV || ret > max_uV) | |
101 | return -EINVAL; | |
102 | ||
3a93f2a9 MB |
103 | *selector = vsel; |
104 | ||
d1c6b4fe MB |
105 | return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, vsel); |
106 | } | |
107 | ||
108 | static int wm831x_gp_ldo_set_voltage(struct regulator_dev *rdev, | |
3a93f2a9 MB |
109 | int min_uV, int max_uV, |
110 | unsigned *selector) | |
d1c6b4fe MB |
111 | { |
112 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
113 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
114 | ||
3a93f2a9 MB |
115 | return wm831x_gp_ldo_set_voltage_int(rdev, reg, min_uV, max_uV, |
116 | selector); | |
d1c6b4fe MB |
117 | } |
118 | ||
119 | static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev, | |
120 | int uV) | |
121 | { | |
122 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
123 | int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; | |
3a93f2a9 | 124 | unsigned int selector; |
d1c6b4fe | 125 | |
3a93f2a9 | 126 | return wm831x_gp_ldo_set_voltage_int(rdev, reg, uV, uV, &selector); |
d1c6b4fe MB |
127 | } |
128 | ||
d1c6b4fe MB |
129 | static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev) |
130 | { | |
131 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
132 | struct wm831x *wm831x = ldo->wm831x; | |
133 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
134 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
9a767d43 | 135 | int ret; |
d1c6b4fe MB |
136 | |
137 | ret = wm831x_reg_read(wm831x, on_reg); | |
138 | if (ret < 0) | |
9a767d43 | 139 | return ret; |
d1c6b4fe MB |
140 | |
141 | if (!(ret & WM831X_LDO1_ON_MODE)) | |
142 | return REGULATOR_MODE_NORMAL; | |
143 | ||
144 | ret = wm831x_reg_read(wm831x, ctrl_reg); | |
145 | if (ret < 0) | |
9a767d43 | 146 | return ret; |
d1c6b4fe MB |
147 | |
148 | if (ret & WM831X_LDO1_LP_MODE) | |
149 | return REGULATOR_MODE_STANDBY; | |
150 | else | |
151 | return REGULATOR_MODE_IDLE; | |
152 | } | |
153 | ||
154 | static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev, | |
155 | unsigned int mode) | |
156 | { | |
157 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
158 | struct wm831x *wm831x = ldo->wm831x; | |
159 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
160 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
161 | int ret; | |
162 | ||
163 | ||
164 | switch (mode) { | |
165 | case REGULATOR_MODE_NORMAL: | |
166 | ret = wm831x_set_bits(wm831x, on_reg, | |
167 | WM831X_LDO1_ON_MODE, 0); | |
168 | if (ret < 0) | |
169 | return ret; | |
170 | break; | |
171 | ||
172 | case REGULATOR_MODE_IDLE: | |
173 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
e260999c | 174 | WM831X_LDO1_LP_MODE, 0); |
d1c6b4fe MB |
175 | if (ret < 0) |
176 | return ret; | |
177 | ||
178 | ret = wm831x_set_bits(wm831x, on_reg, | |
179 | WM831X_LDO1_ON_MODE, | |
180 | WM831X_LDO1_ON_MODE); | |
181 | if (ret < 0) | |
182 | return ret; | |
e260999c | 183 | break; |
d1c6b4fe MB |
184 | |
185 | case REGULATOR_MODE_STANDBY: | |
186 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
e260999c AL |
187 | WM831X_LDO1_LP_MODE, |
188 | WM831X_LDO1_LP_MODE); | |
d1c6b4fe MB |
189 | if (ret < 0) |
190 | return ret; | |
191 | ||
192 | ret = wm831x_set_bits(wm831x, on_reg, | |
193 | WM831X_LDO1_ON_MODE, | |
194 | WM831X_LDO1_ON_MODE); | |
195 | if (ret < 0) | |
196 | return ret; | |
197 | break; | |
198 | ||
199 | default: | |
200 | return -EINVAL; | |
201 | } | |
202 | ||
203 | return 0; | |
204 | } | |
205 | ||
206 | static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev) | |
207 | { | |
208 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
209 | struct wm831x *wm831x = ldo->wm831x; | |
210 | int mask = 1 << rdev_get_id(rdev); | |
211 | int ret; | |
212 | ||
213 | /* Is the regulator on? */ | |
214 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
215 | if (ret < 0) | |
216 | return ret; | |
217 | if (!(ret & mask)) | |
218 | return REGULATOR_STATUS_OFF; | |
219 | ||
220 | /* Is it reporting under voltage? */ | |
221 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); | |
222 | if (ret & mask) | |
223 | return REGULATOR_STATUS_ERROR; | |
224 | ||
225 | ret = wm831x_gp_ldo_get_mode(rdev); | |
226 | if (ret < 0) | |
227 | return ret; | |
228 | else | |
229 | return regulator_mode_to_status(ret); | |
230 | } | |
231 | ||
232 | static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev, | |
233 | int input_uV, | |
234 | int output_uV, int load_uA) | |
235 | { | |
236 | if (load_uA < 20000) | |
237 | return REGULATOR_MODE_STANDBY; | |
238 | if (load_uA < 50000) | |
239 | return REGULATOR_MODE_IDLE; | |
240 | return REGULATOR_MODE_NORMAL; | |
241 | } | |
242 | ||
243 | ||
244 | static struct regulator_ops wm831x_gp_ldo_ops = { | |
245 | .list_voltage = wm831x_gp_ldo_list_voltage, | |
ac663b47 | 246 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
d1c6b4fe MB |
247 | .set_voltage = wm831x_gp_ldo_set_voltage, |
248 | .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage, | |
249 | .get_mode = wm831x_gp_ldo_get_mode, | |
250 | .set_mode = wm831x_gp_ldo_set_mode, | |
251 | .get_status = wm831x_gp_ldo_get_status, | |
252 | .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode, | |
253 | ||
ca8c361b MB |
254 | .is_enabled = regulator_is_enabled_regmap, |
255 | .enable = regulator_enable_regmap, | |
256 | .disable = regulator_disable_regmap, | |
d1c6b4fe MB |
257 | }; |
258 | ||
259 | static __devinit int wm831x_gp_ldo_probe(struct platform_device *pdev) | |
260 | { | |
261 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
262 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
c172708d | 263 | struct regulator_config config = { }; |
137a6354 | 264 | int id; |
d1c6b4fe MB |
265 | struct wm831x_ldo *ldo; |
266 | struct resource *res; | |
267 | int ret, irq; | |
268 | ||
137a6354 MB |
269 | if (pdata && pdata->wm831x_num) |
270 | id = (pdata->wm831x_num * 10) + 1; | |
271 | else | |
272 | id = 0; | |
273 | id = pdev->id - id; | |
274 | ||
d1c6b4fe MB |
275 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
276 | ||
fded2f4f | 277 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); |
d1c6b4fe MB |
278 | if (ldo == NULL) { |
279 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
280 | return -ENOMEM; | |
281 | } | |
282 | ||
283 | ldo->wm831x = wm831x; | |
284 | ||
285 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
286 | if (res == NULL) { | |
287 | dev_err(&pdev->dev, "No I/O resource\n"); | |
288 | ret = -EINVAL; | |
289 | goto err; | |
290 | } | |
291 | ldo->base = res->start; | |
292 | ||
293 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
294 | ldo->desc.name = ldo->name; | |
f1aba13f MB |
295 | |
296 | snprintf(ldo->supply_name, sizeof(ldo->supply_name), | |
297 | "LDO%dVDD", id + 1); | |
298 | ldo->desc.supply_name = ldo->supply_name; | |
299 | ||
d1c6b4fe MB |
300 | ldo->desc.id = id; |
301 | ldo->desc.type = REGULATOR_VOLTAGE; | |
302 | ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1; | |
303 | ldo->desc.ops = &wm831x_gp_ldo_ops; | |
304 | ldo->desc.owner = THIS_MODULE; | |
ac663b47 MB |
305 | ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
306 | ldo->desc.vsel_mask = WM831X_LDO1_ON_VSEL_MASK; | |
ca8c361b MB |
307 | ldo->desc.enable_reg = WM831X_LDO_ENABLE; |
308 | ldo->desc.enable_mask = 1 << id; | |
d1c6b4fe | 309 | |
c172708d | 310 | config.dev = pdev->dev.parent; |
b7ca8788 MB |
311 | if (pdata) |
312 | config.init_data = pdata->ldo[id]; | |
c172708d | 313 | config.driver_data = ldo; |
ac663b47 | 314 | config.regmap = wm831x->regmap; |
c172708d MB |
315 | |
316 | ldo->regulator = regulator_register(&ldo->desc, &config); | |
d1c6b4fe MB |
317 | if (IS_ERR(ldo->regulator)) { |
318 | ret = PTR_ERR(ldo->regulator); | |
319 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
320 | id + 1, ret); | |
321 | goto err; | |
322 | } | |
323 | ||
cd99758b | 324 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); |
dfda9c27 MB |
325 | ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq, |
326 | IRQF_TRIGGER_RISING, ldo->name, | |
327 | ldo); | |
d1c6b4fe MB |
328 | if (ret != 0) { |
329 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
330 | irq, ret); | |
331 | goto err_regulator; | |
332 | } | |
333 | ||
334 | platform_set_drvdata(pdev, ldo); | |
335 | ||
336 | return 0; | |
337 | ||
338 | err_regulator: | |
339 | regulator_unregister(ldo->regulator); | |
340 | err: | |
d1c6b4fe MB |
341 | return ret; |
342 | } | |
343 | ||
344 | static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev) | |
345 | { | |
346 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
d1c6b4fe | 347 | |
eb66d565 DT |
348 | platform_set_drvdata(pdev, NULL); |
349 | ||
cd99758b MB |
350 | free_irq(wm831x_irq(ldo->wm831x, |
351 | platform_get_irq_byname(pdev, "UV")), ldo); | |
d1c6b4fe | 352 | regulator_unregister(ldo->regulator); |
d1c6b4fe MB |
353 | |
354 | return 0; | |
355 | } | |
356 | ||
357 | static struct platform_driver wm831x_gp_ldo_driver = { | |
358 | .probe = wm831x_gp_ldo_probe, | |
359 | .remove = __devexit_p(wm831x_gp_ldo_remove), | |
360 | .driver = { | |
361 | .name = "wm831x-ldo", | |
eb66d565 | 362 | .owner = THIS_MODULE, |
d1c6b4fe MB |
363 | }, |
364 | }; | |
365 | ||
366 | /* | |
367 | * Analogue LDOs | |
368 | */ | |
369 | ||
370 | ||
371 | #define WM831X_ALDO_SELECTOR_LOW 0xc | |
372 | #define WM831X_ALDO_MAX_SELECTOR 0x1f | |
373 | ||
374 | static int wm831x_aldo_list_voltage(struct regulator_dev *rdev, | |
375 | unsigned int selector) | |
376 | { | |
377 | /* 1-1.6V in 50mV steps */ | |
378 | if (selector <= WM831X_ALDO_SELECTOR_LOW) | |
379 | return 1000000 + (selector * 50000); | |
6085d4d9 | 380 | /* 1.7-3.5V in 100mV steps */ |
d1c6b4fe MB |
381 | if (selector <= WM831X_ALDO_MAX_SELECTOR) |
382 | return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW) | |
383 | * 100000); | |
384 | return -EINVAL; | |
385 | } | |
386 | ||
387 | static int wm831x_aldo_set_voltage_int(struct regulator_dev *rdev, int reg, | |
3a93f2a9 MB |
388 | int min_uV, int max_uV, |
389 | unsigned *selector) | |
d1c6b4fe MB |
390 | { |
391 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
392 | struct wm831x *wm831x = ldo->wm831x; | |
393 | int vsel, ret; | |
394 | ||
395 | if (min_uV < 1000000) | |
396 | vsel = 0; | |
397 | else if (min_uV < 1700000) | |
398 | vsel = ((min_uV - 1000000) / 50000); | |
399 | else | |
400 | vsel = ((min_uV - 1700000) / 100000) | |
401 | + WM831X_ALDO_SELECTOR_LOW + 1; | |
402 | ||
403 | ret = wm831x_aldo_list_voltage(rdev, vsel); | |
404 | if (ret < 0) | |
405 | return ret; | |
406 | if (ret < min_uV || ret > max_uV) | |
407 | return -EINVAL; | |
408 | ||
3a93f2a9 MB |
409 | *selector = vsel; |
410 | ||
d1c6b4fe MB |
411 | return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, vsel); |
412 | } | |
413 | ||
414 | static int wm831x_aldo_set_voltage(struct regulator_dev *rdev, | |
3a93f2a9 | 415 | int min_uV, int max_uV, unsigned *selector) |
d1c6b4fe MB |
416 | { |
417 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
418 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
419 | ||
3a93f2a9 MB |
420 | return wm831x_aldo_set_voltage_int(rdev, reg, min_uV, max_uV, |
421 | selector); | |
d1c6b4fe MB |
422 | } |
423 | ||
424 | static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev, | |
425 | int uV) | |
426 | { | |
427 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
428 | int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; | |
3a93f2a9 | 429 | unsigned int selector; |
d1c6b4fe | 430 | |
3a93f2a9 | 431 | return wm831x_aldo_set_voltage_int(rdev, reg, uV, uV, &selector); |
d1c6b4fe MB |
432 | } |
433 | ||
d1c6b4fe MB |
434 | static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev) |
435 | { | |
436 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
437 | struct wm831x *wm831x = ldo->wm831x; | |
438 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
6f17c652 | 439 | int ret; |
d1c6b4fe MB |
440 | |
441 | ret = wm831x_reg_read(wm831x, on_reg); | |
442 | if (ret < 0) | |
443 | return 0; | |
444 | ||
445 | if (ret & WM831X_LDO7_ON_MODE) | |
446 | return REGULATOR_MODE_IDLE; | |
447 | else | |
448 | return REGULATOR_MODE_NORMAL; | |
449 | } | |
450 | ||
451 | static int wm831x_aldo_set_mode(struct regulator_dev *rdev, | |
452 | unsigned int mode) | |
453 | { | |
454 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
455 | struct wm831x *wm831x = ldo->wm831x; | |
d1c6b4fe MB |
456 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
457 | int ret; | |
458 | ||
459 | ||
460 | switch (mode) { | |
461 | case REGULATOR_MODE_NORMAL: | |
e841a36a | 462 | ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, 0); |
d1c6b4fe MB |
463 | if (ret < 0) |
464 | return ret; | |
465 | break; | |
466 | ||
467 | case REGULATOR_MODE_IDLE: | |
e841a36a | 468 | ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, |
d1c6b4fe MB |
469 | WM831X_LDO7_ON_MODE); |
470 | if (ret < 0) | |
471 | return ret; | |
472 | break; | |
473 | ||
474 | default: | |
475 | return -EINVAL; | |
476 | } | |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
481 | static int wm831x_aldo_get_status(struct regulator_dev *rdev) | |
482 | { | |
483 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
484 | struct wm831x *wm831x = ldo->wm831x; | |
485 | int mask = 1 << rdev_get_id(rdev); | |
486 | int ret; | |
487 | ||
488 | /* Is the regulator on? */ | |
489 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
490 | if (ret < 0) | |
491 | return ret; | |
492 | if (!(ret & mask)) | |
493 | return REGULATOR_STATUS_OFF; | |
494 | ||
495 | /* Is it reporting under voltage? */ | |
496 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); | |
497 | if (ret & mask) | |
498 | return REGULATOR_STATUS_ERROR; | |
499 | ||
500 | ret = wm831x_aldo_get_mode(rdev); | |
501 | if (ret < 0) | |
502 | return ret; | |
503 | else | |
504 | return regulator_mode_to_status(ret); | |
505 | } | |
506 | ||
507 | static struct regulator_ops wm831x_aldo_ops = { | |
508 | .list_voltage = wm831x_aldo_list_voltage, | |
ac663b47 | 509 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
d1c6b4fe MB |
510 | .set_voltage = wm831x_aldo_set_voltage, |
511 | .set_suspend_voltage = wm831x_aldo_set_suspend_voltage, | |
512 | .get_mode = wm831x_aldo_get_mode, | |
513 | .set_mode = wm831x_aldo_set_mode, | |
514 | .get_status = wm831x_aldo_get_status, | |
515 | ||
ca8c361b MB |
516 | .is_enabled = regulator_is_enabled_regmap, |
517 | .enable = regulator_enable_regmap, | |
518 | .disable = regulator_disable_regmap, | |
d1c6b4fe MB |
519 | }; |
520 | ||
521 | static __devinit int wm831x_aldo_probe(struct platform_device *pdev) | |
522 | { | |
523 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
524 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
c172708d | 525 | struct regulator_config config = { }; |
137a6354 | 526 | int id; |
d1c6b4fe MB |
527 | struct wm831x_ldo *ldo; |
528 | struct resource *res; | |
529 | int ret, irq; | |
530 | ||
137a6354 MB |
531 | if (pdata && pdata->wm831x_num) |
532 | id = (pdata->wm831x_num * 10) + 1; | |
533 | else | |
534 | id = 0; | |
535 | id = pdev->id - id; | |
536 | ||
d1c6b4fe MB |
537 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
538 | ||
fded2f4f | 539 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); |
d1c6b4fe MB |
540 | if (ldo == NULL) { |
541 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
542 | return -ENOMEM; | |
543 | } | |
544 | ||
545 | ldo->wm831x = wm831x; | |
546 | ||
547 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
548 | if (res == NULL) { | |
549 | dev_err(&pdev->dev, "No I/O resource\n"); | |
550 | ret = -EINVAL; | |
551 | goto err; | |
552 | } | |
553 | ldo->base = res->start; | |
554 | ||
555 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
556 | ldo->desc.name = ldo->name; | |
f1aba13f MB |
557 | |
558 | snprintf(ldo->supply_name, sizeof(ldo->supply_name), | |
559 | "LDO%dVDD", id + 1); | |
560 | ldo->desc.supply_name = ldo->supply_name; | |
561 | ||
d1c6b4fe MB |
562 | ldo->desc.id = id; |
563 | ldo->desc.type = REGULATOR_VOLTAGE; | |
564 | ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1; | |
565 | ldo->desc.ops = &wm831x_aldo_ops; | |
566 | ldo->desc.owner = THIS_MODULE; | |
ac663b47 MB |
567 | ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
568 | ldo->desc.vsel_mask = WM831X_LDO7_ON_VSEL_MASK; | |
ca8c361b MB |
569 | ldo->desc.enable_reg = WM831X_LDO_ENABLE; |
570 | ldo->desc.enable_mask = 1 << id; | |
d1c6b4fe | 571 | |
c172708d | 572 | config.dev = pdev->dev.parent; |
b7ca8788 MB |
573 | if (pdata) |
574 | config.init_data = pdata->ldo[id]; | |
c172708d | 575 | config.driver_data = ldo; |
ac663b47 | 576 | config.regmap = wm831x->regmap; |
c172708d MB |
577 | |
578 | ldo->regulator = regulator_register(&ldo->desc, &config); | |
d1c6b4fe MB |
579 | if (IS_ERR(ldo->regulator)) { |
580 | ret = PTR_ERR(ldo->regulator); | |
581 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
582 | id + 1, ret); | |
583 | goto err; | |
584 | } | |
585 | ||
cd99758b | 586 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); |
dfda9c27 MB |
587 | ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq, |
588 | IRQF_TRIGGER_RISING, ldo->name, ldo); | |
d1c6b4fe MB |
589 | if (ret != 0) { |
590 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
591 | irq, ret); | |
592 | goto err_regulator; | |
593 | } | |
594 | ||
595 | platform_set_drvdata(pdev, ldo); | |
596 | ||
597 | return 0; | |
598 | ||
599 | err_regulator: | |
600 | regulator_unregister(ldo->regulator); | |
601 | err: | |
d1c6b4fe MB |
602 | return ret; |
603 | } | |
604 | ||
605 | static __devexit int wm831x_aldo_remove(struct platform_device *pdev) | |
606 | { | |
607 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
d1c6b4fe | 608 | |
cd99758b MB |
609 | free_irq(wm831x_irq(ldo->wm831x, platform_get_irq_byname(pdev, "UV")), |
610 | ldo); | |
d1c6b4fe | 611 | regulator_unregister(ldo->regulator); |
d1c6b4fe MB |
612 | |
613 | return 0; | |
614 | } | |
615 | ||
616 | static struct platform_driver wm831x_aldo_driver = { | |
617 | .probe = wm831x_aldo_probe, | |
618 | .remove = __devexit_p(wm831x_aldo_remove), | |
619 | .driver = { | |
620 | .name = "wm831x-aldo", | |
eb66d565 | 621 | .owner = THIS_MODULE, |
d1c6b4fe MB |
622 | }, |
623 | }; | |
624 | ||
625 | /* | |
626 | * Alive LDO | |
627 | */ | |
628 | ||
629 | #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf | |
630 | ||
d1c6b4fe MB |
631 | static int wm831x_alive_ldo_set_voltage_int(struct regulator_dev *rdev, |
632 | int reg, | |
3a93f2a9 MB |
633 | int min_uV, int max_uV, |
634 | unsigned *selector) | |
d1c6b4fe MB |
635 | { |
636 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
637 | struct wm831x *wm831x = ldo->wm831x; | |
638 | int vsel, ret; | |
639 | ||
640 | vsel = (min_uV - 800000) / 50000; | |
641 | ||
d31e954e | 642 | ret = regulator_list_voltage_linear(rdev, vsel); |
d1c6b4fe MB |
643 | if (ret < 0) |
644 | return ret; | |
645 | if (ret < min_uV || ret > max_uV) | |
646 | return -EINVAL; | |
647 | ||
3a93f2a9 MB |
648 | *selector = vsel; |
649 | ||
d1c6b4fe MB |
650 | return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, vsel); |
651 | } | |
652 | ||
653 | static int wm831x_alive_ldo_set_voltage(struct regulator_dev *rdev, | |
3a93f2a9 MB |
654 | int min_uV, int max_uV, |
655 | unsigned *selector) | |
d1c6b4fe MB |
656 | { |
657 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
658 | int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; | |
659 | ||
3a93f2a9 MB |
660 | return wm831x_alive_ldo_set_voltage_int(rdev, reg, min_uV, max_uV, |
661 | selector); | |
d1c6b4fe MB |
662 | } |
663 | ||
664 | static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev, | |
665 | int uV) | |
666 | { | |
667 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
668 | int reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL; | |
3a93f2a9 | 669 | unsigned selector; |
d1c6b4fe | 670 | |
3a93f2a9 | 671 | return wm831x_alive_ldo_set_voltage_int(rdev, reg, uV, uV, &selector); |
d1c6b4fe MB |
672 | } |
673 | ||
d1c6b4fe MB |
674 | static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev) |
675 | { | |
676 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
677 | struct wm831x *wm831x = ldo->wm831x; | |
678 | int mask = 1 << rdev_get_id(rdev); | |
679 | int ret; | |
680 | ||
681 | /* Is the regulator on? */ | |
682 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
683 | if (ret < 0) | |
684 | return ret; | |
685 | if (ret & mask) | |
686 | return REGULATOR_STATUS_ON; | |
687 | else | |
688 | return REGULATOR_STATUS_OFF; | |
689 | } | |
690 | ||
691 | static struct regulator_ops wm831x_alive_ldo_ops = { | |
d31e954e | 692 | .list_voltage = regulator_list_voltage_linear, |
ac663b47 | 693 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
d1c6b4fe MB |
694 | .set_voltage = wm831x_alive_ldo_set_voltage, |
695 | .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage, | |
696 | .get_status = wm831x_alive_ldo_get_status, | |
697 | ||
ca8c361b MB |
698 | .is_enabled = regulator_is_enabled_regmap, |
699 | .enable = regulator_enable_regmap, | |
700 | .disable = regulator_disable_regmap, | |
d1c6b4fe MB |
701 | }; |
702 | ||
703 | static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev) | |
704 | { | |
705 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
706 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
c172708d | 707 | struct regulator_config config = { }; |
137a6354 | 708 | int id; |
d1c6b4fe MB |
709 | struct wm831x_ldo *ldo; |
710 | struct resource *res; | |
711 | int ret; | |
712 | ||
137a6354 MB |
713 | if (pdata && pdata->wm831x_num) |
714 | id = (pdata->wm831x_num * 10) + 1; | |
715 | else | |
716 | id = 0; | |
717 | id = pdev->id - id; | |
718 | ||
719 | ||
d1c6b4fe MB |
720 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
721 | ||
fded2f4f | 722 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); |
d1c6b4fe MB |
723 | if (ldo == NULL) { |
724 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
725 | return -ENOMEM; | |
726 | } | |
727 | ||
728 | ldo->wm831x = wm831x; | |
729 | ||
730 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
731 | if (res == NULL) { | |
732 | dev_err(&pdev->dev, "No I/O resource\n"); | |
733 | ret = -EINVAL; | |
734 | goto err; | |
735 | } | |
736 | ldo->base = res->start; | |
737 | ||
738 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
739 | ldo->desc.name = ldo->name; | |
f1aba13f MB |
740 | |
741 | snprintf(ldo->supply_name, sizeof(ldo->supply_name), | |
742 | "LDO%dVDD", id + 1); | |
743 | ldo->desc.supply_name = ldo->supply_name; | |
744 | ||
d1c6b4fe MB |
745 | ldo->desc.id = id; |
746 | ldo->desc.type = REGULATOR_VOLTAGE; | |
747 | ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1; | |
748 | ldo->desc.ops = &wm831x_alive_ldo_ops; | |
749 | ldo->desc.owner = THIS_MODULE; | |
ac663b47 MB |
750 | ldo->desc.vsel_reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; |
751 | ldo->desc.vsel_mask = WM831X_LDO11_ON_VSEL_MASK; | |
ca8c361b MB |
752 | ldo->desc.enable_reg = WM831X_LDO_ENABLE; |
753 | ldo->desc.enable_mask = 1 << id; | |
d31e954e MB |
754 | ldo->desc.min_uV = 800000; |
755 | ldo->desc.uV_step = 50000; | |
d1c6b4fe | 756 | |
c172708d | 757 | config.dev = pdev->dev.parent; |
b7ca8788 MB |
758 | if (pdata) |
759 | config.init_data = pdata->ldo[id]; | |
c172708d | 760 | config.driver_data = ldo; |
ac663b47 | 761 | config.regmap = wm831x->regmap; |
c172708d MB |
762 | |
763 | ldo->regulator = regulator_register(&ldo->desc, &config); | |
d1c6b4fe MB |
764 | if (IS_ERR(ldo->regulator)) { |
765 | ret = PTR_ERR(ldo->regulator); | |
766 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
767 | id + 1, ret); | |
768 | goto err; | |
769 | } | |
770 | ||
771 | platform_set_drvdata(pdev, ldo); | |
772 | ||
773 | return 0; | |
774 | ||
775 | err: | |
d1c6b4fe MB |
776 | return ret; |
777 | } | |
778 | ||
779 | static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev) | |
780 | { | |
781 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
782 | ||
783 | regulator_unregister(ldo->regulator); | |
d1c6b4fe MB |
784 | |
785 | return 0; | |
786 | } | |
787 | ||
788 | static struct platform_driver wm831x_alive_ldo_driver = { | |
789 | .probe = wm831x_alive_ldo_probe, | |
790 | .remove = __devexit_p(wm831x_alive_ldo_remove), | |
791 | .driver = { | |
792 | .name = "wm831x-alive-ldo", | |
eb66d565 | 793 | .owner = THIS_MODULE, |
d1c6b4fe MB |
794 | }, |
795 | }; | |
796 | ||
797 | static int __init wm831x_ldo_init(void) | |
798 | { | |
799 | int ret; | |
800 | ||
801 | ret = platform_driver_register(&wm831x_gp_ldo_driver); | |
802 | if (ret != 0) | |
803 | pr_err("Failed to register WM831x GP LDO driver: %d\n", ret); | |
804 | ||
805 | ret = platform_driver_register(&wm831x_aldo_driver); | |
806 | if (ret != 0) | |
807 | pr_err("Failed to register WM831x ALDO driver: %d\n", ret); | |
808 | ||
809 | ret = platform_driver_register(&wm831x_alive_ldo_driver); | |
810 | if (ret != 0) | |
811 | pr_err("Failed to register WM831x alive LDO driver: %d\n", | |
812 | ret); | |
813 | ||
814 | return 0; | |
815 | } | |
816 | subsys_initcall(wm831x_ldo_init); | |
817 | ||
818 | static void __exit wm831x_ldo_exit(void) | |
819 | { | |
820 | platform_driver_unregister(&wm831x_alive_ldo_driver); | |
821 | platform_driver_unregister(&wm831x_aldo_driver); | |
822 | platform_driver_unregister(&wm831x_gp_ldo_driver); | |
823 | } | |
824 | module_exit(wm831x_ldo_exit); | |
825 | ||
826 | /* Module information */ | |
827 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
828 | MODULE_DESCRIPTION("WM831x LDO driver"); | |
829 | MODULE_LICENSE("GPL"); | |
830 | MODULE_ALIAS("platform:wm831x-ldo"); | |
831 | MODULE_ALIAS("platform:wm831x-aldo"); | |
832 | MODULE_ALIAS("platform:wm831x-aliveldo"); |