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 | ||
fded2f4f | 329 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); |
d1c6b4fe MB |
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, | |
2c043bcb | 354 | pdata->ldo[id], ldo, NULL); |
d1c6b4fe MB |
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: | |
d1c6b4fe MB |
379 | return ret; |
380 | } | |
381 | ||
382 | static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev) | |
383 | { | |
384 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
d1c6b4fe | 385 | |
eb66d565 DT |
386 | platform_set_drvdata(pdev, NULL); |
387 | ||
dfda9c27 | 388 | free_irq(platform_get_irq_byname(pdev, "UV"), ldo); |
d1c6b4fe | 389 | regulator_unregister(ldo->regulator); |
d1c6b4fe MB |
390 | |
391 | return 0; | |
392 | } | |
393 | ||
394 | static struct platform_driver wm831x_gp_ldo_driver = { | |
395 | .probe = wm831x_gp_ldo_probe, | |
396 | .remove = __devexit_p(wm831x_gp_ldo_remove), | |
397 | .driver = { | |
398 | .name = "wm831x-ldo", | |
eb66d565 | 399 | .owner = THIS_MODULE, |
d1c6b4fe MB |
400 | }, |
401 | }; | |
402 | ||
403 | /* | |
404 | * Analogue LDOs | |
405 | */ | |
406 | ||
407 | ||
408 | #define WM831X_ALDO_SELECTOR_LOW 0xc | |
409 | #define WM831X_ALDO_MAX_SELECTOR 0x1f | |
410 | ||
411 | static int wm831x_aldo_list_voltage(struct regulator_dev *rdev, | |
412 | unsigned int selector) | |
413 | { | |
414 | /* 1-1.6V in 50mV steps */ | |
415 | if (selector <= WM831X_ALDO_SELECTOR_LOW) | |
416 | return 1000000 + (selector * 50000); | |
417 | /* 1.7-3.5V in 50mV steps */ | |
418 | if (selector <= WM831X_ALDO_MAX_SELECTOR) | |
419 | return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW) | |
420 | * 100000); | |
421 | return -EINVAL; | |
422 | } | |
423 | ||
424 | static int wm831x_aldo_set_voltage_int(struct regulator_dev *rdev, int reg, | |
3a93f2a9 MB |
425 | int min_uV, int max_uV, |
426 | unsigned *selector) | |
d1c6b4fe MB |
427 | { |
428 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
429 | struct wm831x *wm831x = ldo->wm831x; | |
430 | int vsel, ret; | |
431 | ||
432 | if (min_uV < 1000000) | |
433 | vsel = 0; | |
434 | else if (min_uV < 1700000) | |
435 | vsel = ((min_uV - 1000000) / 50000); | |
436 | else | |
437 | vsel = ((min_uV - 1700000) / 100000) | |
438 | + WM831X_ALDO_SELECTOR_LOW + 1; | |
439 | ||
440 | ret = wm831x_aldo_list_voltage(rdev, vsel); | |
441 | if (ret < 0) | |
442 | return ret; | |
443 | if (ret < min_uV || ret > max_uV) | |
444 | return -EINVAL; | |
445 | ||
3a93f2a9 MB |
446 | *selector = vsel; |
447 | ||
d1c6b4fe MB |
448 | return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, vsel); |
449 | } | |
450 | ||
451 | static int wm831x_aldo_set_voltage(struct regulator_dev *rdev, | |
3a93f2a9 | 452 | int min_uV, int max_uV, unsigned *selector) |
d1c6b4fe MB |
453 | { |
454 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
455 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
456 | ||
3a93f2a9 MB |
457 | return wm831x_aldo_set_voltage_int(rdev, reg, min_uV, max_uV, |
458 | selector); | |
d1c6b4fe MB |
459 | } |
460 | ||
461 | static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev, | |
462 | int uV) | |
463 | { | |
464 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
465 | int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; | |
3a93f2a9 | 466 | unsigned int selector; |
d1c6b4fe | 467 | |
3a93f2a9 | 468 | return wm831x_aldo_set_voltage_int(rdev, reg, uV, uV, &selector); |
d1c6b4fe MB |
469 | } |
470 | ||
afb8bb80 | 471 | static int wm831x_aldo_get_voltage_sel(struct regulator_dev *rdev) |
d1c6b4fe MB |
472 | { |
473 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
474 | struct wm831x *wm831x = ldo->wm831x; | |
475 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
476 | int ret; | |
477 | ||
478 | ret = wm831x_reg_read(wm831x, reg); | |
479 | if (ret < 0) | |
480 | return ret; | |
481 | ||
482 | ret &= WM831X_LDO7_ON_VSEL_MASK; | |
483 | ||
afb8bb80 | 484 | return ret; |
d1c6b4fe MB |
485 | } |
486 | ||
487 | static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev) | |
488 | { | |
489 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
490 | struct wm831x *wm831x = ldo->wm831x; | |
491 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
6f17c652 | 492 | int ret; |
d1c6b4fe MB |
493 | |
494 | ret = wm831x_reg_read(wm831x, on_reg); | |
495 | if (ret < 0) | |
496 | return 0; | |
497 | ||
498 | if (ret & WM831X_LDO7_ON_MODE) | |
499 | return REGULATOR_MODE_IDLE; | |
500 | else | |
501 | return REGULATOR_MODE_NORMAL; | |
502 | } | |
503 | ||
504 | static int wm831x_aldo_set_mode(struct regulator_dev *rdev, | |
505 | unsigned int mode) | |
506 | { | |
507 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
508 | struct wm831x *wm831x = ldo->wm831x; | |
509 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
510 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
511 | int ret; | |
512 | ||
513 | ||
514 | switch (mode) { | |
515 | case REGULATOR_MODE_NORMAL: | |
516 | ret = wm831x_set_bits(wm831x, on_reg, | |
517 | WM831X_LDO7_ON_MODE, 0); | |
518 | if (ret < 0) | |
519 | return ret; | |
520 | break; | |
521 | ||
522 | case REGULATOR_MODE_IDLE: | |
523 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
524 | WM831X_LDO7_ON_MODE, | |
525 | WM831X_LDO7_ON_MODE); | |
526 | if (ret < 0) | |
527 | return ret; | |
528 | break; | |
529 | ||
530 | default: | |
531 | return -EINVAL; | |
532 | } | |
533 | ||
534 | return 0; | |
535 | } | |
536 | ||
537 | static int wm831x_aldo_get_status(struct regulator_dev *rdev) | |
538 | { | |
539 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
540 | struct wm831x *wm831x = ldo->wm831x; | |
541 | int mask = 1 << rdev_get_id(rdev); | |
542 | int ret; | |
543 | ||
544 | /* Is the regulator on? */ | |
545 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
546 | if (ret < 0) | |
547 | return ret; | |
548 | if (!(ret & mask)) | |
549 | return REGULATOR_STATUS_OFF; | |
550 | ||
551 | /* Is it reporting under voltage? */ | |
552 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); | |
553 | if (ret & mask) | |
554 | return REGULATOR_STATUS_ERROR; | |
555 | ||
556 | ret = wm831x_aldo_get_mode(rdev); | |
557 | if (ret < 0) | |
558 | return ret; | |
559 | else | |
560 | return regulator_mode_to_status(ret); | |
561 | } | |
562 | ||
563 | static struct regulator_ops wm831x_aldo_ops = { | |
564 | .list_voltage = wm831x_aldo_list_voltage, | |
afb8bb80 | 565 | .get_voltage_sel = wm831x_aldo_get_voltage_sel, |
d1c6b4fe MB |
566 | .set_voltage = wm831x_aldo_set_voltage, |
567 | .set_suspend_voltage = wm831x_aldo_set_suspend_voltage, | |
568 | .get_mode = wm831x_aldo_get_mode, | |
569 | .set_mode = wm831x_aldo_set_mode, | |
570 | .get_status = wm831x_aldo_get_status, | |
571 | ||
572 | .is_enabled = wm831x_ldo_is_enabled, | |
573 | .enable = wm831x_ldo_enable, | |
574 | .disable = wm831x_ldo_disable, | |
575 | }; | |
576 | ||
577 | static __devinit int wm831x_aldo_probe(struct platform_device *pdev) | |
578 | { | |
579 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
580 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
137a6354 | 581 | int id; |
d1c6b4fe MB |
582 | struct wm831x_ldo *ldo; |
583 | struct resource *res; | |
584 | int ret, irq; | |
585 | ||
137a6354 MB |
586 | if (pdata && pdata->wm831x_num) |
587 | id = (pdata->wm831x_num * 10) + 1; | |
588 | else | |
589 | id = 0; | |
590 | id = pdev->id - id; | |
591 | ||
d1c6b4fe MB |
592 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
593 | ||
594 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
595 | return -ENODEV; | |
596 | ||
fded2f4f | 597 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); |
d1c6b4fe MB |
598 | if (ldo == NULL) { |
599 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
600 | return -ENOMEM; | |
601 | } | |
602 | ||
603 | ldo->wm831x = wm831x; | |
604 | ||
605 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
606 | if (res == NULL) { | |
607 | dev_err(&pdev->dev, "No I/O resource\n"); | |
608 | ret = -EINVAL; | |
609 | goto err; | |
610 | } | |
611 | ldo->base = res->start; | |
612 | ||
613 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
614 | ldo->desc.name = ldo->name; | |
615 | ldo->desc.id = id; | |
616 | ldo->desc.type = REGULATOR_VOLTAGE; | |
617 | ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1; | |
618 | ldo->desc.ops = &wm831x_aldo_ops; | |
619 | ldo->desc.owner = THIS_MODULE; | |
620 | ||
621 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
2c043bcb | 622 | pdata->ldo[id], ldo, NULL); |
d1c6b4fe MB |
623 | if (IS_ERR(ldo->regulator)) { |
624 | ret = PTR_ERR(ldo->regulator); | |
625 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
626 | id + 1, ret); | |
627 | goto err; | |
628 | } | |
629 | ||
630 | irq = platform_get_irq_byname(pdev, "UV"); | |
dfda9c27 MB |
631 | ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq, |
632 | IRQF_TRIGGER_RISING, ldo->name, ldo); | |
d1c6b4fe MB |
633 | if (ret != 0) { |
634 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
635 | irq, ret); | |
636 | goto err_regulator; | |
637 | } | |
638 | ||
639 | platform_set_drvdata(pdev, ldo); | |
640 | ||
641 | return 0; | |
642 | ||
643 | err_regulator: | |
644 | regulator_unregister(ldo->regulator); | |
645 | err: | |
d1c6b4fe MB |
646 | return ret; |
647 | } | |
648 | ||
649 | static __devexit int wm831x_aldo_remove(struct platform_device *pdev) | |
650 | { | |
651 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
d1c6b4fe | 652 | |
dfda9c27 | 653 | free_irq(platform_get_irq_byname(pdev, "UV"), ldo); |
d1c6b4fe | 654 | regulator_unregister(ldo->regulator); |
d1c6b4fe MB |
655 | |
656 | return 0; | |
657 | } | |
658 | ||
659 | static struct platform_driver wm831x_aldo_driver = { | |
660 | .probe = wm831x_aldo_probe, | |
661 | .remove = __devexit_p(wm831x_aldo_remove), | |
662 | .driver = { | |
663 | .name = "wm831x-aldo", | |
eb66d565 | 664 | .owner = THIS_MODULE, |
d1c6b4fe MB |
665 | }, |
666 | }; | |
667 | ||
668 | /* | |
669 | * Alive LDO | |
670 | */ | |
671 | ||
672 | #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf | |
673 | ||
674 | static int wm831x_alive_ldo_list_voltage(struct regulator_dev *rdev, | |
675 | unsigned int selector) | |
676 | { | |
677 | /* 0.8-1.55V in 50mV steps */ | |
678 | if (selector <= WM831X_ALIVE_LDO_MAX_SELECTOR) | |
679 | return 800000 + (selector * 50000); | |
680 | return -EINVAL; | |
681 | } | |
682 | ||
683 | static int wm831x_alive_ldo_set_voltage_int(struct regulator_dev *rdev, | |
684 | int reg, | |
3a93f2a9 MB |
685 | int min_uV, int max_uV, |
686 | unsigned *selector) | |
d1c6b4fe MB |
687 | { |
688 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
689 | struct wm831x *wm831x = ldo->wm831x; | |
690 | int vsel, ret; | |
691 | ||
692 | vsel = (min_uV - 800000) / 50000; | |
693 | ||
694 | ret = wm831x_alive_ldo_list_voltage(rdev, vsel); | |
695 | if (ret < 0) | |
696 | return ret; | |
697 | if (ret < min_uV || ret > max_uV) | |
698 | return -EINVAL; | |
699 | ||
3a93f2a9 MB |
700 | *selector = vsel; |
701 | ||
d1c6b4fe MB |
702 | return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, vsel); |
703 | } | |
704 | ||
705 | static int wm831x_alive_ldo_set_voltage(struct regulator_dev *rdev, | |
3a93f2a9 MB |
706 | int min_uV, int max_uV, |
707 | unsigned *selector) | |
d1c6b4fe MB |
708 | { |
709 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
710 | int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; | |
711 | ||
3a93f2a9 MB |
712 | return wm831x_alive_ldo_set_voltage_int(rdev, reg, min_uV, max_uV, |
713 | selector); | |
d1c6b4fe MB |
714 | } |
715 | ||
716 | static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev, | |
717 | int uV) | |
718 | { | |
719 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
720 | int reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL; | |
3a93f2a9 | 721 | unsigned selector; |
d1c6b4fe | 722 | |
3a93f2a9 | 723 | return wm831x_alive_ldo_set_voltage_int(rdev, reg, uV, uV, &selector); |
d1c6b4fe MB |
724 | } |
725 | ||
afb8bb80 | 726 | static int wm831x_alive_ldo_get_voltage_sel(struct regulator_dev *rdev) |
d1c6b4fe MB |
727 | { |
728 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
729 | struct wm831x *wm831x = ldo->wm831x; | |
730 | int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; | |
731 | int ret; | |
732 | ||
733 | ret = wm831x_reg_read(wm831x, reg); | |
734 | if (ret < 0) | |
735 | return ret; | |
736 | ||
737 | ret &= WM831X_LDO11_ON_VSEL_MASK; | |
738 | ||
afb8bb80 | 739 | return ret; |
d1c6b4fe MB |
740 | } |
741 | ||
742 | static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev) | |
743 | { | |
744 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
745 | struct wm831x *wm831x = ldo->wm831x; | |
746 | int mask = 1 << rdev_get_id(rdev); | |
747 | int ret; | |
748 | ||
749 | /* Is the regulator on? */ | |
750 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
751 | if (ret < 0) | |
752 | return ret; | |
753 | if (ret & mask) | |
754 | return REGULATOR_STATUS_ON; | |
755 | else | |
756 | return REGULATOR_STATUS_OFF; | |
757 | } | |
758 | ||
759 | static struct regulator_ops wm831x_alive_ldo_ops = { | |
760 | .list_voltage = wm831x_alive_ldo_list_voltage, | |
afb8bb80 | 761 | .get_voltage_sel = wm831x_alive_ldo_get_voltage_sel, |
d1c6b4fe MB |
762 | .set_voltage = wm831x_alive_ldo_set_voltage, |
763 | .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage, | |
764 | .get_status = wm831x_alive_ldo_get_status, | |
765 | ||
766 | .is_enabled = wm831x_ldo_is_enabled, | |
767 | .enable = wm831x_ldo_enable, | |
768 | .disable = wm831x_ldo_disable, | |
769 | }; | |
770 | ||
771 | static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev) | |
772 | { | |
773 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
774 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
137a6354 | 775 | int id; |
d1c6b4fe MB |
776 | struct wm831x_ldo *ldo; |
777 | struct resource *res; | |
778 | int ret; | |
779 | ||
137a6354 MB |
780 | if (pdata && pdata->wm831x_num) |
781 | id = (pdata->wm831x_num * 10) + 1; | |
782 | else | |
783 | id = 0; | |
784 | id = pdev->id - id; | |
785 | ||
786 | ||
d1c6b4fe MB |
787 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
788 | ||
789 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
790 | return -ENODEV; | |
791 | ||
fded2f4f | 792 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); |
d1c6b4fe MB |
793 | if (ldo == NULL) { |
794 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
795 | return -ENOMEM; | |
796 | } | |
797 | ||
798 | ldo->wm831x = wm831x; | |
799 | ||
800 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
801 | if (res == NULL) { | |
802 | dev_err(&pdev->dev, "No I/O resource\n"); | |
803 | ret = -EINVAL; | |
804 | goto err; | |
805 | } | |
806 | ldo->base = res->start; | |
807 | ||
808 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
809 | ldo->desc.name = ldo->name; | |
810 | ldo->desc.id = id; | |
811 | ldo->desc.type = REGULATOR_VOLTAGE; | |
812 | ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1; | |
813 | ldo->desc.ops = &wm831x_alive_ldo_ops; | |
814 | ldo->desc.owner = THIS_MODULE; | |
815 | ||
816 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
2c043bcb | 817 | pdata->ldo[id], ldo, NULL); |
d1c6b4fe MB |
818 | if (IS_ERR(ldo->regulator)) { |
819 | ret = PTR_ERR(ldo->regulator); | |
820 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
821 | id + 1, ret); | |
822 | goto err; | |
823 | } | |
824 | ||
825 | platform_set_drvdata(pdev, ldo); | |
826 | ||
827 | return 0; | |
828 | ||
829 | err: | |
d1c6b4fe MB |
830 | return ret; |
831 | } | |
832 | ||
833 | static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev) | |
834 | { | |
835 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
836 | ||
837 | regulator_unregister(ldo->regulator); | |
d1c6b4fe MB |
838 | |
839 | return 0; | |
840 | } | |
841 | ||
842 | static struct platform_driver wm831x_alive_ldo_driver = { | |
843 | .probe = wm831x_alive_ldo_probe, | |
844 | .remove = __devexit_p(wm831x_alive_ldo_remove), | |
845 | .driver = { | |
846 | .name = "wm831x-alive-ldo", | |
eb66d565 | 847 | .owner = THIS_MODULE, |
d1c6b4fe MB |
848 | }, |
849 | }; | |
850 | ||
851 | static int __init wm831x_ldo_init(void) | |
852 | { | |
853 | int ret; | |
854 | ||
855 | ret = platform_driver_register(&wm831x_gp_ldo_driver); | |
856 | if (ret != 0) | |
857 | pr_err("Failed to register WM831x GP LDO driver: %d\n", ret); | |
858 | ||
859 | ret = platform_driver_register(&wm831x_aldo_driver); | |
860 | if (ret != 0) | |
861 | pr_err("Failed to register WM831x ALDO driver: %d\n", ret); | |
862 | ||
863 | ret = platform_driver_register(&wm831x_alive_ldo_driver); | |
864 | if (ret != 0) | |
865 | pr_err("Failed to register WM831x alive LDO driver: %d\n", | |
866 | ret); | |
867 | ||
868 | return 0; | |
869 | } | |
870 | subsys_initcall(wm831x_ldo_init); | |
871 | ||
872 | static void __exit wm831x_ldo_exit(void) | |
873 | { | |
874 | platform_driver_unregister(&wm831x_alive_ldo_driver); | |
875 | platform_driver_unregister(&wm831x_aldo_driver); | |
876 | platform_driver_unregister(&wm831x_gp_ldo_driver); | |
877 | } | |
878 | module_exit(wm831x_ldo_exit); | |
879 | ||
880 | /* Module information */ | |
881 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
882 | MODULE_DESCRIPTION("WM831x LDO driver"); | |
883 | MODULE_LICENSE("GPL"); | |
884 | MODULE_ALIAS("platform:wm831x-ldo"); | |
885 | MODULE_ALIAS("platform:wm831x-aldo"); | |
886 | MODULE_ALIAS("platform:wm831x-aliveldo"); |