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 | ||
28 | #define WM831X_LDO_MAX_NAME 6 | |
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 | struct regulator_desc desc; | |
40 | int base; | |
41 | struct wm831x *wm831x; | |
42 | struct regulator_dev *regulator; | |
43 | }; | |
44 | ||
45 | /* | |
46 | * Shared | |
47 | */ | |
48 | ||
49 | static int wm831x_ldo_is_enabled(struct regulator_dev *rdev) | |
50 | { | |
51 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
52 | struct wm831x *wm831x = ldo->wm831x; | |
53 | int mask = 1 << rdev_get_id(rdev); | |
54 | int reg; | |
55 | ||
56 | reg = wm831x_reg_read(wm831x, WM831X_LDO_ENABLE); | |
57 | if (reg < 0) | |
58 | return reg; | |
59 | ||
60 | if (reg & mask) | |
61 | return 1; | |
62 | else | |
63 | return 0; | |
64 | } | |
65 | ||
66 | static int wm831x_ldo_enable(struct regulator_dev *rdev) | |
67 | { | |
68 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
69 | struct wm831x *wm831x = ldo->wm831x; | |
70 | int mask = 1 << rdev_get_id(rdev); | |
71 | ||
72 | return wm831x_set_bits(wm831x, WM831X_LDO_ENABLE, mask, mask); | |
73 | } | |
74 | ||
75 | static int wm831x_ldo_disable(struct regulator_dev *rdev) | |
76 | { | |
77 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
78 | struct wm831x *wm831x = ldo->wm831x; | |
79 | int mask = 1 << rdev_get_id(rdev); | |
80 | ||
81 | return wm831x_set_bits(wm831x, WM831X_LDO_ENABLE, mask, 0); | |
82 | } | |
83 | ||
84 | static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data) | |
85 | { | |
86 | struct wm831x_ldo *ldo = data; | |
87 | ||
88 | regulator_notifier_call_chain(ldo->regulator, | |
89 | REGULATOR_EVENT_UNDER_VOLTAGE, | |
90 | NULL); | |
91 | ||
92 | return IRQ_HANDLED; | |
93 | } | |
94 | ||
95 | /* | |
96 | * General purpose LDOs | |
97 | */ | |
98 | ||
99 | #define WM831X_GP_LDO_SELECTOR_LOW 0xe | |
100 | #define WM831X_GP_LDO_MAX_SELECTOR 0x1f | |
101 | ||
102 | static int wm831x_gp_ldo_list_voltage(struct regulator_dev *rdev, | |
103 | unsigned int selector) | |
104 | { | |
105 | /* 0.9-1.6V in 50mV steps */ | |
106 | if (selector <= WM831X_GP_LDO_SELECTOR_LOW) | |
107 | return 900000 + (selector * 50000); | |
108 | /* 1.7-3.3V in 50mV steps */ | |
109 | if (selector <= WM831X_GP_LDO_MAX_SELECTOR) | |
110 | return 1600000 + ((selector - WM831X_GP_LDO_SELECTOR_LOW) | |
111 | * 100000); | |
112 | return -EINVAL; | |
113 | } | |
114 | ||
115 | static int wm831x_gp_ldo_set_voltage_int(struct regulator_dev *rdev, int reg, | |
3a93f2a9 MB |
116 | int min_uV, int max_uV, |
117 | unsigned *selector) | |
d1c6b4fe MB |
118 | { |
119 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
120 | struct wm831x *wm831x = ldo->wm831x; | |
121 | int vsel, ret; | |
122 | ||
123 | if (min_uV < 900000) | |
124 | vsel = 0; | |
125 | else if (min_uV < 1700000) | |
126 | vsel = ((min_uV - 900000) / 50000); | |
127 | else | |
128 | vsel = ((min_uV - 1700000) / 100000) | |
129 | + WM831X_GP_LDO_SELECTOR_LOW + 1; | |
130 | ||
131 | ret = wm831x_gp_ldo_list_voltage(rdev, vsel); | |
132 | if (ret < 0) | |
133 | return ret; | |
134 | if (ret < min_uV || ret > max_uV) | |
135 | return -EINVAL; | |
136 | ||
3a93f2a9 MB |
137 | *selector = vsel; |
138 | ||
d1c6b4fe MB |
139 | return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, vsel); |
140 | } | |
141 | ||
142 | static int wm831x_gp_ldo_set_voltage(struct regulator_dev *rdev, | |
3a93f2a9 MB |
143 | int min_uV, int max_uV, |
144 | unsigned *selector) | |
d1c6b4fe MB |
145 | { |
146 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
147 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
148 | ||
3a93f2a9 MB |
149 | return wm831x_gp_ldo_set_voltage_int(rdev, reg, min_uV, max_uV, |
150 | selector); | |
d1c6b4fe MB |
151 | } |
152 | ||
153 | static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev, | |
154 | int uV) | |
155 | { | |
156 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
157 | int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; | |
3a93f2a9 | 158 | unsigned int selector; |
d1c6b4fe | 159 | |
3a93f2a9 | 160 | return wm831x_gp_ldo_set_voltage_int(rdev, reg, uV, uV, &selector); |
d1c6b4fe MB |
161 | } |
162 | ||
afb8bb80 | 163 | static int wm831x_gp_ldo_get_voltage_sel(struct regulator_dev *rdev) |
d1c6b4fe MB |
164 | { |
165 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
166 | struct wm831x *wm831x = ldo->wm831x; | |
167 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
168 | int ret; | |
169 | ||
170 | ret = wm831x_reg_read(wm831x, reg); | |
171 | if (ret < 0) | |
172 | return ret; | |
173 | ||
174 | ret &= WM831X_LDO1_ON_VSEL_MASK; | |
175 | ||
afb8bb80 | 176 | return ret; |
d1c6b4fe MB |
177 | } |
178 | ||
179 | static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev) | |
180 | { | |
181 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
182 | struct wm831x *wm831x = ldo->wm831x; | |
183 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
184 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
9a767d43 | 185 | int ret; |
d1c6b4fe MB |
186 | |
187 | ret = wm831x_reg_read(wm831x, on_reg); | |
188 | if (ret < 0) | |
9a767d43 | 189 | return ret; |
d1c6b4fe MB |
190 | |
191 | if (!(ret & WM831X_LDO1_ON_MODE)) | |
192 | return REGULATOR_MODE_NORMAL; | |
193 | ||
194 | ret = wm831x_reg_read(wm831x, ctrl_reg); | |
195 | if (ret < 0) | |
9a767d43 | 196 | return ret; |
d1c6b4fe MB |
197 | |
198 | if (ret & WM831X_LDO1_LP_MODE) | |
199 | return REGULATOR_MODE_STANDBY; | |
200 | else | |
201 | return REGULATOR_MODE_IDLE; | |
202 | } | |
203 | ||
204 | static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev, | |
205 | unsigned int mode) | |
206 | { | |
207 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
208 | struct wm831x *wm831x = ldo->wm831x; | |
209 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
210 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
211 | int ret; | |
212 | ||
213 | ||
214 | switch (mode) { | |
215 | case REGULATOR_MODE_NORMAL: | |
216 | ret = wm831x_set_bits(wm831x, on_reg, | |
217 | WM831X_LDO1_ON_MODE, 0); | |
218 | if (ret < 0) | |
219 | return ret; | |
220 | break; | |
221 | ||
222 | case REGULATOR_MODE_IDLE: | |
223 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
e260999c | 224 | WM831X_LDO1_LP_MODE, 0); |
d1c6b4fe MB |
225 | if (ret < 0) |
226 | return ret; | |
227 | ||
228 | ret = wm831x_set_bits(wm831x, on_reg, | |
229 | WM831X_LDO1_ON_MODE, | |
230 | WM831X_LDO1_ON_MODE); | |
231 | if (ret < 0) | |
232 | return ret; | |
e260999c | 233 | break; |
d1c6b4fe MB |
234 | |
235 | case REGULATOR_MODE_STANDBY: | |
236 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
e260999c AL |
237 | WM831X_LDO1_LP_MODE, |
238 | WM831X_LDO1_LP_MODE); | |
d1c6b4fe MB |
239 | if (ret < 0) |
240 | return ret; | |
241 | ||
242 | ret = wm831x_set_bits(wm831x, on_reg, | |
243 | WM831X_LDO1_ON_MODE, | |
244 | WM831X_LDO1_ON_MODE); | |
245 | if (ret < 0) | |
246 | return ret; | |
247 | break; | |
248 | ||
249 | default: | |
250 | return -EINVAL; | |
251 | } | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
256 | static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev) | |
257 | { | |
258 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
259 | struct wm831x *wm831x = ldo->wm831x; | |
260 | int mask = 1 << rdev_get_id(rdev); | |
261 | int ret; | |
262 | ||
263 | /* Is the regulator on? */ | |
264 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
265 | if (ret < 0) | |
266 | return ret; | |
267 | if (!(ret & mask)) | |
268 | return REGULATOR_STATUS_OFF; | |
269 | ||
270 | /* Is it reporting under voltage? */ | |
271 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); | |
272 | if (ret & mask) | |
273 | return REGULATOR_STATUS_ERROR; | |
274 | ||
275 | ret = wm831x_gp_ldo_get_mode(rdev); | |
276 | if (ret < 0) | |
277 | return ret; | |
278 | else | |
279 | return regulator_mode_to_status(ret); | |
280 | } | |
281 | ||
282 | static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev, | |
283 | int input_uV, | |
284 | int output_uV, int load_uA) | |
285 | { | |
286 | if (load_uA < 20000) | |
287 | return REGULATOR_MODE_STANDBY; | |
288 | if (load_uA < 50000) | |
289 | return REGULATOR_MODE_IDLE; | |
290 | return REGULATOR_MODE_NORMAL; | |
291 | } | |
292 | ||
293 | ||
294 | static struct regulator_ops wm831x_gp_ldo_ops = { | |
295 | .list_voltage = wm831x_gp_ldo_list_voltage, | |
afb8bb80 | 296 | .get_voltage_sel = wm831x_gp_ldo_get_voltage_sel, |
d1c6b4fe MB |
297 | .set_voltage = wm831x_gp_ldo_set_voltage, |
298 | .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage, | |
299 | .get_mode = wm831x_gp_ldo_get_mode, | |
300 | .set_mode = wm831x_gp_ldo_set_mode, | |
301 | .get_status = wm831x_gp_ldo_get_status, | |
302 | .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode, | |
303 | ||
304 | .is_enabled = wm831x_ldo_is_enabled, | |
305 | .enable = wm831x_ldo_enable, | |
306 | .disable = wm831x_ldo_disable, | |
307 | }; | |
308 | ||
309 | static __devinit int wm831x_gp_ldo_probe(struct platform_device *pdev) | |
310 | { | |
311 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
312 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
137a6354 | 313 | int id; |
d1c6b4fe MB |
314 | struct wm831x_ldo *ldo; |
315 | struct resource *res; | |
316 | int ret, irq; | |
317 | ||
137a6354 MB |
318 | if (pdata && pdata->wm831x_num) |
319 | id = (pdata->wm831x_num * 10) + 1; | |
320 | else | |
321 | id = 0; | |
322 | id = pdev->id - id; | |
323 | ||
d1c6b4fe MB |
324 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
325 | ||
326 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
327 | return -ENODEV; | |
328 | ||
329 | ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); | |
330 | if (ldo == NULL) { | |
331 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
332 | return -ENOMEM; | |
333 | } | |
334 | ||
335 | ldo->wm831x = wm831x; | |
336 | ||
337 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
338 | if (res == NULL) { | |
339 | dev_err(&pdev->dev, "No I/O resource\n"); | |
340 | ret = -EINVAL; | |
341 | goto err; | |
342 | } | |
343 | ldo->base = res->start; | |
344 | ||
345 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
346 | ldo->desc.name = ldo->name; | |
347 | ldo->desc.id = id; | |
348 | ldo->desc.type = REGULATOR_VOLTAGE; | |
349 | ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1; | |
350 | ldo->desc.ops = &wm831x_gp_ldo_ops; | |
351 | ldo->desc.owner = THIS_MODULE; | |
352 | ||
353 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
354 | pdata->ldo[id], ldo); | |
355 | if (IS_ERR(ldo->regulator)) { | |
356 | ret = PTR_ERR(ldo->regulator); | |
357 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
358 | id + 1, ret); | |
359 | goto err; | |
360 | } | |
361 | ||
362 | irq = platform_get_irq_byname(pdev, "UV"); | |
dfda9c27 MB |
363 | ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq, |
364 | IRQF_TRIGGER_RISING, ldo->name, | |
365 | ldo); | |
d1c6b4fe MB |
366 | if (ret != 0) { |
367 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
368 | irq, ret); | |
369 | goto err_regulator; | |
370 | } | |
371 | ||
372 | platform_set_drvdata(pdev, ldo); | |
373 | ||
374 | return 0; | |
375 | ||
376 | err_regulator: | |
377 | regulator_unregister(ldo->regulator); | |
378 | err: | |
379 | kfree(ldo); | |
380 | return ret; | |
381 | } | |
382 | ||
383 | static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev) | |
384 | { | |
385 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
d1c6b4fe | 386 | |
eb66d565 DT |
387 | platform_set_drvdata(pdev, NULL); |
388 | ||
dfda9c27 | 389 | free_irq(platform_get_irq_byname(pdev, "UV"), ldo); |
d1c6b4fe MB |
390 | regulator_unregister(ldo->regulator); |
391 | kfree(ldo); | |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
396 | static struct platform_driver wm831x_gp_ldo_driver = { | |
397 | .probe = wm831x_gp_ldo_probe, | |
398 | .remove = __devexit_p(wm831x_gp_ldo_remove), | |
399 | .driver = { | |
400 | .name = "wm831x-ldo", | |
eb66d565 | 401 | .owner = THIS_MODULE, |
d1c6b4fe MB |
402 | }, |
403 | }; | |
404 | ||
405 | /* | |
406 | * Analogue LDOs | |
407 | */ | |
408 | ||
409 | ||
410 | #define WM831X_ALDO_SELECTOR_LOW 0xc | |
411 | #define WM831X_ALDO_MAX_SELECTOR 0x1f | |
412 | ||
413 | static int wm831x_aldo_list_voltage(struct regulator_dev *rdev, | |
414 | unsigned int selector) | |
415 | { | |
416 | /* 1-1.6V in 50mV steps */ | |
417 | if (selector <= WM831X_ALDO_SELECTOR_LOW) | |
418 | return 1000000 + (selector * 50000); | |
419 | /* 1.7-3.5V in 50mV steps */ | |
420 | if (selector <= WM831X_ALDO_MAX_SELECTOR) | |
421 | return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW) | |
422 | * 100000); | |
423 | return -EINVAL; | |
424 | } | |
425 | ||
426 | static int wm831x_aldo_set_voltage_int(struct regulator_dev *rdev, int reg, | |
3a93f2a9 MB |
427 | int min_uV, int max_uV, |
428 | unsigned *selector) | |
d1c6b4fe MB |
429 | { |
430 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
431 | struct wm831x *wm831x = ldo->wm831x; | |
432 | int vsel, ret; | |
433 | ||
434 | if (min_uV < 1000000) | |
435 | vsel = 0; | |
436 | else if (min_uV < 1700000) | |
437 | vsel = ((min_uV - 1000000) / 50000); | |
438 | else | |
439 | vsel = ((min_uV - 1700000) / 100000) | |
440 | + WM831X_ALDO_SELECTOR_LOW + 1; | |
441 | ||
442 | ret = wm831x_aldo_list_voltage(rdev, vsel); | |
443 | if (ret < 0) | |
444 | return ret; | |
445 | if (ret < min_uV || ret > max_uV) | |
446 | return -EINVAL; | |
447 | ||
3a93f2a9 MB |
448 | *selector = vsel; |
449 | ||
d1c6b4fe MB |
450 | return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, vsel); |
451 | } | |
452 | ||
453 | static int wm831x_aldo_set_voltage(struct regulator_dev *rdev, | |
3a93f2a9 | 454 | int min_uV, int max_uV, unsigned *selector) |
d1c6b4fe MB |
455 | { |
456 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
457 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
458 | ||
3a93f2a9 MB |
459 | return wm831x_aldo_set_voltage_int(rdev, reg, min_uV, max_uV, |
460 | selector); | |
d1c6b4fe MB |
461 | } |
462 | ||
463 | static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev, | |
464 | int uV) | |
465 | { | |
466 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
467 | int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; | |
3a93f2a9 | 468 | unsigned int selector; |
d1c6b4fe | 469 | |
3a93f2a9 | 470 | return wm831x_aldo_set_voltage_int(rdev, reg, uV, uV, &selector); |
d1c6b4fe MB |
471 | } |
472 | ||
afb8bb80 | 473 | static int wm831x_aldo_get_voltage_sel(struct regulator_dev *rdev) |
d1c6b4fe MB |
474 | { |
475 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
476 | struct wm831x *wm831x = ldo->wm831x; | |
477 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
478 | int ret; | |
479 | ||
480 | ret = wm831x_reg_read(wm831x, reg); | |
481 | if (ret < 0) | |
482 | return ret; | |
483 | ||
484 | ret &= WM831X_LDO7_ON_VSEL_MASK; | |
485 | ||
afb8bb80 | 486 | return ret; |
d1c6b4fe MB |
487 | } |
488 | ||
489 | static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev) | |
490 | { | |
491 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
492 | struct wm831x *wm831x = ldo->wm831x; | |
493 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
6f17c652 | 494 | int ret; |
d1c6b4fe MB |
495 | |
496 | ret = wm831x_reg_read(wm831x, on_reg); | |
497 | if (ret < 0) | |
498 | return 0; | |
499 | ||
500 | if (ret & WM831X_LDO7_ON_MODE) | |
501 | return REGULATOR_MODE_IDLE; | |
502 | else | |
503 | return REGULATOR_MODE_NORMAL; | |
504 | } | |
505 | ||
506 | static int wm831x_aldo_set_mode(struct regulator_dev *rdev, | |
507 | unsigned int mode) | |
508 | { | |
509 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
510 | struct wm831x *wm831x = ldo->wm831x; | |
511 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
512 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
513 | int ret; | |
514 | ||
515 | ||
516 | switch (mode) { | |
517 | case REGULATOR_MODE_NORMAL: | |
518 | ret = wm831x_set_bits(wm831x, on_reg, | |
519 | WM831X_LDO7_ON_MODE, 0); | |
520 | if (ret < 0) | |
521 | return ret; | |
522 | break; | |
523 | ||
524 | case REGULATOR_MODE_IDLE: | |
525 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
526 | WM831X_LDO7_ON_MODE, | |
527 | WM831X_LDO7_ON_MODE); | |
528 | if (ret < 0) | |
529 | return ret; | |
530 | break; | |
531 | ||
532 | default: | |
533 | return -EINVAL; | |
534 | } | |
535 | ||
536 | return 0; | |
537 | } | |
538 | ||
539 | static int wm831x_aldo_get_status(struct regulator_dev *rdev) | |
540 | { | |
541 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
542 | struct wm831x *wm831x = ldo->wm831x; | |
543 | int mask = 1 << rdev_get_id(rdev); | |
544 | int ret; | |
545 | ||
546 | /* Is the regulator on? */ | |
547 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
548 | if (ret < 0) | |
549 | return ret; | |
550 | if (!(ret & mask)) | |
551 | return REGULATOR_STATUS_OFF; | |
552 | ||
553 | /* Is it reporting under voltage? */ | |
554 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); | |
555 | if (ret & mask) | |
556 | return REGULATOR_STATUS_ERROR; | |
557 | ||
558 | ret = wm831x_aldo_get_mode(rdev); | |
559 | if (ret < 0) | |
560 | return ret; | |
561 | else | |
562 | return regulator_mode_to_status(ret); | |
563 | } | |
564 | ||
565 | static struct regulator_ops wm831x_aldo_ops = { | |
566 | .list_voltage = wm831x_aldo_list_voltage, | |
afb8bb80 | 567 | .get_voltage_sel = wm831x_aldo_get_voltage_sel, |
d1c6b4fe MB |
568 | .set_voltage = wm831x_aldo_set_voltage, |
569 | .set_suspend_voltage = wm831x_aldo_set_suspend_voltage, | |
570 | .get_mode = wm831x_aldo_get_mode, | |
571 | .set_mode = wm831x_aldo_set_mode, | |
572 | .get_status = wm831x_aldo_get_status, | |
573 | ||
574 | .is_enabled = wm831x_ldo_is_enabled, | |
575 | .enable = wm831x_ldo_enable, | |
576 | .disable = wm831x_ldo_disable, | |
577 | }; | |
578 | ||
579 | static __devinit int wm831x_aldo_probe(struct platform_device *pdev) | |
580 | { | |
581 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
582 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
137a6354 | 583 | int id; |
d1c6b4fe MB |
584 | struct wm831x_ldo *ldo; |
585 | struct resource *res; | |
586 | int ret, irq; | |
587 | ||
137a6354 MB |
588 | if (pdata && pdata->wm831x_num) |
589 | id = (pdata->wm831x_num * 10) + 1; | |
590 | else | |
591 | id = 0; | |
592 | id = pdev->id - id; | |
593 | ||
d1c6b4fe MB |
594 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
595 | ||
596 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
597 | return -ENODEV; | |
598 | ||
599 | ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); | |
600 | if (ldo == NULL) { | |
601 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
602 | return -ENOMEM; | |
603 | } | |
604 | ||
605 | ldo->wm831x = wm831x; | |
606 | ||
607 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
608 | if (res == NULL) { | |
609 | dev_err(&pdev->dev, "No I/O resource\n"); | |
610 | ret = -EINVAL; | |
611 | goto err; | |
612 | } | |
613 | ldo->base = res->start; | |
614 | ||
615 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
616 | ldo->desc.name = ldo->name; | |
617 | ldo->desc.id = id; | |
618 | ldo->desc.type = REGULATOR_VOLTAGE; | |
619 | ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1; | |
620 | ldo->desc.ops = &wm831x_aldo_ops; | |
621 | ldo->desc.owner = THIS_MODULE; | |
622 | ||
623 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
624 | pdata->ldo[id], ldo); | |
625 | if (IS_ERR(ldo->regulator)) { | |
626 | ret = PTR_ERR(ldo->regulator); | |
627 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
628 | id + 1, ret); | |
629 | goto err; | |
630 | } | |
631 | ||
632 | irq = platform_get_irq_byname(pdev, "UV"); | |
dfda9c27 MB |
633 | ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq, |
634 | IRQF_TRIGGER_RISING, ldo->name, ldo); | |
d1c6b4fe MB |
635 | if (ret != 0) { |
636 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
637 | irq, ret); | |
638 | goto err_regulator; | |
639 | } | |
640 | ||
641 | platform_set_drvdata(pdev, ldo); | |
642 | ||
643 | return 0; | |
644 | ||
645 | err_regulator: | |
646 | regulator_unregister(ldo->regulator); | |
647 | err: | |
648 | kfree(ldo); | |
649 | return ret; | |
650 | } | |
651 | ||
652 | static __devexit int wm831x_aldo_remove(struct platform_device *pdev) | |
653 | { | |
654 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
d1c6b4fe | 655 | |
dfda9c27 | 656 | free_irq(platform_get_irq_byname(pdev, "UV"), ldo); |
d1c6b4fe MB |
657 | regulator_unregister(ldo->regulator); |
658 | kfree(ldo); | |
659 | ||
660 | return 0; | |
661 | } | |
662 | ||
663 | static struct platform_driver wm831x_aldo_driver = { | |
664 | .probe = wm831x_aldo_probe, | |
665 | .remove = __devexit_p(wm831x_aldo_remove), | |
666 | .driver = { | |
667 | .name = "wm831x-aldo", | |
eb66d565 | 668 | .owner = THIS_MODULE, |
d1c6b4fe MB |
669 | }, |
670 | }; | |
671 | ||
672 | /* | |
673 | * Alive LDO | |
674 | */ | |
675 | ||
676 | #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf | |
677 | ||
678 | static int wm831x_alive_ldo_list_voltage(struct regulator_dev *rdev, | |
679 | unsigned int selector) | |
680 | { | |
681 | /* 0.8-1.55V in 50mV steps */ | |
682 | if (selector <= WM831X_ALIVE_LDO_MAX_SELECTOR) | |
683 | return 800000 + (selector * 50000); | |
684 | return -EINVAL; | |
685 | } | |
686 | ||
687 | static int wm831x_alive_ldo_set_voltage_int(struct regulator_dev *rdev, | |
688 | int reg, | |
3a93f2a9 MB |
689 | int min_uV, int max_uV, |
690 | unsigned *selector) | |
d1c6b4fe MB |
691 | { |
692 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
693 | struct wm831x *wm831x = ldo->wm831x; | |
694 | int vsel, ret; | |
695 | ||
696 | vsel = (min_uV - 800000) / 50000; | |
697 | ||
698 | ret = wm831x_alive_ldo_list_voltage(rdev, vsel); | |
699 | if (ret < 0) | |
700 | return ret; | |
701 | if (ret < min_uV || ret > max_uV) | |
702 | return -EINVAL; | |
703 | ||
3a93f2a9 MB |
704 | *selector = vsel; |
705 | ||
d1c6b4fe MB |
706 | return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, vsel); |
707 | } | |
708 | ||
709 | static int wm831x_alive_ldo_set_voltage(struct regulator_dev *rdev, | |
3a93f2a9 MB |
710 | int min_uV, int max_uV, |
711 | unsigned *selector) | |
d1c6b4fe MB |
712 | { |
713 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
714 | int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; | |
715 | ||
3a93f2a9 MB |
716 | return wm831x_alive_ldo_set_voltage_int(rdev, reg, min_uV, max_uV, |
717 | selector); | |
d1c6b4fe MB |
718 | } |
719 | ||
720 | static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev, | |
721 | int uV) | |
722 | { | |
723 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
724 | int reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL; | |
3a93f2a9 | 725 | unsigned selector; |
d1c6b4fe | 726 | |
3a93f2a9 | 727 | return wm831x_alive_ldo_set_voltage_int(rdev, reg, uV, uV, &selector); |
d1c6b4fe MB |
728 | } |
729 | ||
afb8bb80 | 730 | static int wm831x_alive_ldo_get_voltage_sel(struct regulator_dev *rdev) |
d1c6b4fe MB |
731 | { |
732 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
733 | struct wm831x *wm831x = ldo->wm831x; | |
734 | int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; | |
735 | int ret; | |
736 | ||
737 | ret = wm831x_reg_read(wm831x, reg); | |
738 | if (ret < 0) | |
739 | return ret; | |
740 | ||
741 | ret &= WM831X_LDO11_ON_VSEL_MASK; | |
742 | ||
afb8bb80 | 743 | return ret; |
d1c6b4fe MB |
744 | } |
745 | ||
746 | static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev) | |
747 | { | |
748 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
749 | struct wm831x *wm831x = ldo->wm831x; | |
750 | int mask = 1 << rdev_get_id(rdev); | |
751 | int ret; | |
752 | ||
753 | /* Is the regulator on? */ | |
754 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
755 | if (ret < 0) | |
756 | return ret; | |
757 | if (ret & mask) | |
758 | return REGULATOR_STATUS_ON; | |
759 | else | |
760 | return REGULATOR_STATUS_OFF; | |
761 | } | |
762 | ||
763 | static struct regulator_ops wm831x_alive_ldo_ops = { | |
764 | .list_voltage = wm831x_alive_ldo_list_voltage, | |
afb8bb80 | 765 | .get_voltage_sel = wm831x_alive_ldo_get_voltage_sel, |
d1c6b4fe MB |
766 | .set_voltage = wm831x_alive_ldo_set_voltage, |
767 | .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage, | |
768 | .get_status = wm831x_alive_ldo_get_status, | |
769 | ||
770 | .is_enabled = wm831x_ldo_is_enabled, | |
771 | .enable = wm831x_ldo_enable, | |
772 | .disable = wm831x_ldo_disable, | |
773 | }; | |
774 | ||
775 | static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev) | |
776 | { | |
777 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
778 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
137a6354 | 779 | int id; |
d1c6b4fe MB |
780 | struct wm831x_ldo *ldo; |
781 | struct resource *res; | |
782 | int ret; | |
783 | ||
137a6354 MB |
784 | if (pdata && pdata->wm831x_num) |
785 | id = (pdata->wm831x_num * 10) + 1; | |
786 | else | |
787 | id = 0; | |
788 | id = pdev->id - id; | |
789 | ||
790 | ||
d1c6b4fe MB |
791 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
792 | ||
793 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
794 | return -ENODEV; | |
795 | ||
796 | ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); | |
797 | if (ldo == NULL) { | |
798 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
799 | return -ENOMEM; | |
800 | } | |
801 | ||
802 | ldo->wm831x = wm831x; | |
803 | ||
804 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
805 | if (res == NULL) { | |
806 | dev_err(&pdev->dev, "No I/O resource\n"); | |
807 | ret = -EINVAL; | |
808 | goto err; | |
809 | } | |
810 | ldo->base = res->start; | |
811 | ||
812 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
813 | ldo->desc.name = ldo->name; | |
814 | ldo->desc.id = id; | |
815 | ldo->desc.type = REGULATOR_VOLTAGE; | |
816 | ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1; | |
817 | ldo->desc.ops = &wm831x_alive_ldo_ops; | |
818 | ldo->desc.owner = THIS_MODULE; | |
819 | ||
820 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
821 | pdata->ldo[id], ldo); | |
822 | if (IS_ERR(ldo->regulator)) { | |
823 | ret = PTR_ERR(ldo->regulator); | |
824 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
825 | id + 1, ret); | |
826 | goto err; | |
827 | } | |
828 | ||
829 | platform_set_drvdata(pdev, ldo); | |
830 | ||
831 | return 0; | |
832 | ||
833 | err: | |
834 | kfree(ldo); | |
835 | return ret; | |
836 | } | |
837 | ||
838 | static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev) | |
839 | { | |
840 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
841 | ||
842 | regulator_unregister(ldo->regulator); | |
843 | kfree(ldo); | |
844 | ||
845 | return 0; | |
846 | } | |
847 | ||
848 | static struct platform_driver wm831x_alive_ldo_driver = { | |
849 | .probe = wm831x_alive_ldo_probe, | |
850 | .remove = __devexit_p(wm831x_alive_ldo_remove), | |
851 | .driver = { | |
852 | .name = "wm831x-alive-ldo", | |
eb66d565 | 853 | .owner = THIS_MODULE, |
d1c6b4fe MB |
854 | }, |
855 | }; | |
856 | ||
857 | static int __init wm831x_ldo_init(void) | |
858 | { | |
859 | int ret; | |
860 | ||
861 | ret = platform_driver_register(&wm831x_gp_ldo_driver); | |
862 | if (ret != 0) | |
863 | pr_err("Failed to register WM831x GP LDO driver: %d\n", ret); | |
864 | ||
865 | ret = platform_driver_register(&wm831x_aldo_driver); | |
866 | if (ret != 0) | |
867 | pr_err("Failed to register WM831x ALDO driver: %d\n", ret); | |
868 | ||
869 | ret = platform_driver_register(&wm831x_alive_ldo_driver); | |
870 | if (ret != 0) | |
871 | pr_err("Failed to register WM831x alive LDO driver: %d\n", | |
872 | ret); | |
873 | ||
874 | return 0; | |
875 | } | |
876 | subsys_initcall(wm831x_ldo_init); | |
877 | ||
878 | static void __exit wm831x_ldo_exit(void) | |
879 | { | |
880 | platform_driver_unregister(&wm831x_alive_ldo_driver); | |
881 | platform_driver_unregister(&wm831x_aldo_driver); | |
882 | platform_driver_unregister(&wm831x_gp_ldo_driver); | |
883 | } | |
884 | module_exit(wm831x_ldo_exit); | |
885 | ||
886 | /* Module information */ | |
887 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
888 | MODULE_DESCRIPTION("WM831x LDO driver"); | |
889 | MODULE_LICENSE("GPL"); | |
890 | MODULE_ALIAS("platform:wm831x-ldo"); | |
891 | MODULE_ALIAS("platform:wm831x-aldo"); | |
892 | MODULE_ALIAS("platform:wm831x-aliveldo"); |