]>
Commit | Line | Data |
---|---|---|
e4ee831f MB |
1 | /* |
2 | * wm831x-dcdc.c -- DC-DC buck convertor 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> | |
e24a04c4 MB |
22 | #include <linux/regulator/machine.h> |
23 | #include <linux/gpio.h> | |
e4ee831f MB |
24 | |
25 | #include <linux/mfd/wm831x/core.h> | |
26 | #include <linux/mfd/wm831x/regulator.h> | |
27 | #include <linux/mfd/wm831x/pdata.h> | |
28 | ||
29 | #define WM831X_BUCKV_MAX_SELECTOR 0x68 | |
30 | #define WM831X_BUCKP_MAX_SELECTOR 0x66 | |
31 | ||
32 | #define WM831X_DCDC_MODE_FAST 0 | |
33 | #define WM831X_DCDC_MODE_NORMAL 1 | |
34 | #define WM831X_DCDC_MODE_IDLE 2 | |
35 | #define WM831X_DCDC_MODE_STANDBY 3 | |
36 | ||
37 | #define WM831X_DCDC_MAX_NAME 6 | |
38 | ||
39 | /* Register offsets in control block */ | |
40 | #define WM831X_DCDC_CONTROL_1 0 | |
41 | #define WM831X_DCDC_CONTROL_2 1 | |
42 | #define WM831X_DCDC_ON_CONFIG 2 | |
43 | #define WM831X_DCDC_SLEEP_CONTROL 3 | |
e24a04c4 | 44 | #define WM831X_DCDC_DVS_CONTROL 4 |
e4ee831f MB |
45 | |
46 | /* | |
47 | * Shared | |
48 | */ | |
49 | ||
50 | struct wm831x_dcdc { | |
51 | char name[WM831X_DCDC_MAX_NAME]; | |
52 | struct regulator_desc desc; | |
53 | int base; | |
54 | struct wm831x *wm831x; | |
55 | struct regulator_dev *regulator; | |
e24a04c4 MB |
56 | int dvs_gpio; |
57 | int dvs_gpio_state; | |
58 | int on_vsel; | |
59 | int dvs_vsel; | |
e4ee831f MB |
60 | }; |
61 | ||
62 | static int wm831x_dcdc_is_enabled(struct regulator_dev *rdev) | |
63 | { | |
64 | struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); | |
65 | struct wm831x *wm831x = dcdc->wm831x; | |
66 | int mask = 1 << rdev_get_id(rdev); | |
67 | int reg; | |
68 | ||
69 | reg = wm831x_reg_read(wm831x, WM831X_DCDC_ENABLE); | |
70 | if (reg < 0) | |
71 | return reg; | |
72 | ||
73 | if (reg & mask) | |
74 | return 1; | |
75 | else | |
76 | return 0; | |
77 | } | |
78 | ||
79 | static int wm831x_dcdc_enable(struct regulator_dev *rdev) | |
80 | { | |
81 | struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); | |
82 | struct wm831x *wm831x = dcdc->wm831x; | |
83 | int mask = 1 << rdev_get_id(rdev); | |
84 | ||
85 | return wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, mask, mask); | |
86 | } | |
87 | ||
88 | static int wm831x_dcdc_disable(struct regulator_dev *rdev) | |
89 | { | |
90 | struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); | |
91 | struct wm831x *wm831x = dcdc->wm831x; | |
92 | int mask = 1 << rdev_get_id(rdev); | |
93 | ||
94 | return wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, mask, 0); | |
95 | } | |
96 | ||
97 | static unsigned int wm831x_dcdc_get_mode(struct regulator_dev *rdev) | |
98 | ||
99 | { | |
100 | struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); | |
101 | struct wm831x *wm831x = dcdc->wm831x; | |
102 | u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; | |
103 | int val; | |
104 | ||
105 | val = wm831x_reg_read(wm831x, reg); | |
106 | if (val < 0) | |
107 | return val; | |
108 | ||
109 | val = (val & WM831X_DC1_ON_MODE_MASK) >> WM831X_DC1_ON_MODE_SHIFT; | |
110 | ||
111 | switch (val) { | |
112 | case WM831X_DCDC_MODE_FAST: | |
113 | return REGULATOR_MODE_FAST; | |
114 | case WM831X_DCDC_MODE_NORMAL: | |
115 | return REGULATOR_MODE_NORMAL; | |
116 | case WM831X_DCDC_MODE_STANDBY: | |
117 | return REGULATOR_MODE_STANDBY; | |
118 | case WM831X_DCDC_MODE_IDLE: | |
119 | return REGULATOR_MODE_IDLE; | |
120 | default: | |
121 | BUG(); | |
122 | } | |
123 | } | |
124 | ||
125 | static int wm831x_dcdc_set_mode_int(struct wm831x *wm831x, int reg, | |
126 | unsigned int mode) | |
127 | { | |
128 | int val; | |
129 | ||
130 | switch (mode) { | |
131 | case REGULATOR_MODE_FAST: | |
132 | val = WM831X_DCDC_MODE_FAST; | |
133 | break; | |
134 | case REGULATOR_MODE_NORMAL: | |
135 | val = WM831X_DCDC_MODE_NORMAL; | |
136 | break; | |
137 | case REGULATOR_MODE_STANDBY: | |
138 | val = WM831X_DCDC_MODE_STANDBY; | |
139 | break; | |
140 | case REGULATOR_MODE_IDLE: | |
141 | val = WM831X_DCDC_MODE_IDLE; | |
142 | break; | |
143 | default: | |
144 | return -EINVAL; | |
145 | } | |
146 | ||
147 | return wm831x_set_bits(wm831x, reg, WM831X_DC1_ON_MODE_MASK, | |
148 | val << WM831X_DC1_ON_MODE_SHIFT); | |
149 | } | |
150 | ||
151 | static int wm831x_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode) | |
152 | { | |
153 | struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); | |
154 | struct wm831x *wm831x = dcdc->wm831x; | |
155 | u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; | |
156 | ||
157 | return wm831x_dcdc_set_mode_int(wm831x, reg, mode); | |
158 | } | |
159 | ||
160 | static int wm831x_dcdc_set_suspend_mode(struct regulator_dev *rdev, | |
161 | unsigned int mode) | |
162 | { | |
163 | struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); | |
164 | struct wm831x *wm831x = dcdc->wm831x; | |
165 | u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; | |
166 | ||
167 | return wm831x_dcdc_set_mode_int(wm831x, reg, mode); | |
168 | } | |
169 | ||
170 | static int wm831x_dcdc_get_status(struct regulator_dev *rdev) | |
171 | { | |
172 | struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); | |
173 | struct wm831x *wm831x = dcdc->wm831x; | |
174 | int ret; | |
175 | ||
176 | /* First, check for errors */ | |
177 | ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); | |
178 | if (ret < 0) | |
179 | return ret; | |
180 | ||
181 | if (ret & (1 << rdev_get_id(rdev))) { | |
182 | dev_dbg(wm831x->dev, "DCDC%d under voltage\n", | |
183 | rdev_get_id(rdev) + 1); | |
184 | return REGULATOR_STATUS_ERROR; | |
185 | } | |
186 | ||
187 | /* DCDC1 and DCDC2 can additionally detect high voltage/current */ | |
188 | if (rdev_get_id(rdev) < 2) { | |
189 | if (ret & (WM831X_DC1_OV_STS << rdev_get_id(rdev))) { | |
190 | dev_dbg(wm831x->dev, "DCDC%d over voltage\n", | |
191 | rdev_get_id(rdev) + 1); | |
192 | return REGULATOR_STATUS_ERROR; | |
193 | } | |
194 | ||
195 | if (ret & (WM831X_DC1_HC_STS << rdev_get_id(rdev))) { | |
196 | dev_dbg(wm831x->dev, "DCDC%d over current\n", | |
197 | rdev_get_id(rdev) + 1); | |
198 | return REGULATOR_STATUS_ERROR; | |
199 | } | |
200 | } | |
201 | ||
202 | /* Is the regulator on? */ | |
203 | ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); | |
204 | if (ret < 0) | |
205 | return ret; | |
206 | if (!(ret & (1 << rdev_get_id(rdev)))) | |
207 | return REGULATOR_STATUS_OFF; | |
208 | ||
209 | /* TODO: When we handle hardware control modes so we can report the | |
210 | * current mode. */ | |
211 | return REGULATOR_STATUS_ON; | |
212 | } | |
213 | ||
214 | static irqreturn_t wm831x_dcdc_uv_irq(int irq, void *data) | |
215 | { | |
216 | struct wm831x_dcdc *dcdc = data; | |
217 | ||
218 | regulator_notifier_call_chain(dcdc->regulator, | |
219 | REGULATOR_EVENT_UNDER_VOLTAGE, | |
220 | NULL); | |
221 | ||
222 | return IRQ_HANDLED; | |
223 | } | |
224 | ||
225 | static irqreturn_t wm831x_dcdc_oc_irq(int irq, void *data) | |
226 | { | |
227 | struct wm831x_dcdc *dcdc = data; | |
228 | ||
229 | regulator_notifier_call_chain(dcdc->regulator, | |
230 | REGULATOR_EVENT_OVER_CURRENT, | |
231 | NULL); | |
232 | ||
233 | return IRQ_HANDLED; | |
234 | } | |
235 | ||
236 | /* | |
237 | * BUCKV specifics | |
238 | */ | |
239 | ||
240 | static int wm831x_buckv_list_voltage(struct regulator_dev *rdev, | |
241 | unsigned selector) | |
242 | { | |
243 | if (selector <= 0x8) | |
244 | return 600000; | |
245 | if (selector <= WM831X_BUCKV_MAX_SELECTOR) | |
246 | return 600000 + ((selector - 0x8) * 12500); | |
247 | return -EINVAL; | |
248 | } | |
249 | ||
e24a04c4 MB |
250 | static int wm831x_buckv_select_min_voltage(struct regulator_dev *rdev, |
251 | int min_uV, int max_uV) | |
e4ee831f | 252 | { |
e4ee831f MB |
253 | u16 vsel; |
254 | ||
255 | if (min_uV < 600000) | |
256 | vsel = 0; | |
257 | else if (min_uV <= 1800000) | |
258 | vsel = ((min_uV - 600000) / 12500) + 8; | |
259 | else | |
260 | return -EINVAL; | |
261 | ||
262 | if (wm831x_buckv_list_voltage(rdev, vsel) > max_uV) | |
263 | return -EINVAL; | |
264 | ||
e24a04c4 MB |
265 | return vsel; |
266 | } | |
267 | ||
268 | static int wm831x_buckv_select_max_voltage(struct regulator_dev *rdev, | |
269 | int min_uV, int max_uV) | |
270 | { | |
271 | u16 vsel; | |
272 | ||
273 | if (max_uV < 600000 || max_uV > 1800000) | |
274 | return -EINVAL; | |
275 | ||
276 | vsel = ((max_uV - 600000) / 12500) + 8; | |
277 | ||
278 | if (wm831x_buckv_list_voltage(rdev, vsel) < min_uV || | |
279 | wm831x_buckv_list_voltage(rdev, vsel) < max_uV) | |
280 | return -EINVAL; | |
281 | ||
282 | return vsel; | |
283 | } | |
284 | ||
285 | static int wm831x_buckv_set_dvs(struct regulator_dev *rdev, int state) | |
286 | { | |
287 | struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); | |
288 | ||
289 | if (state == dcdc->dvs_gpio_state) | |
290 | return 0; | |
291 | ||
292 | dcdc->dvs_gpio_state = state; | |
293 | gpio_set_value(dcdc->dvs_gpio, state); | |
294 | ||
295 | /* Should wait for DVS state change to be asserted if we have | |
296 | * a GPIO for it, for now assume the device is configured | |
297 | * for the fastest possible transition. | |
298 | */ | |
299 | ||
300 | return 0; | |
e4ee831f MB |
301 | } |
302 | ||
303 | static int wm831x_buckv_set_voltage(struct regulator_dev *rdev, | |
e24a04c4 | 304 | int min_uV, int max_uV) |
e4ee831f MB |
305 | { |
306 | struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); | |
e24a04c4 MB |
307 | struct wm831x *wm831x = dcdc->wm831x; |
308 | int on_reg = dcdc->base + WM831X_DCDC_ON_CONFIG; | |
309 | int dvs_reg = dcdc->base + WM831X_DCDC_DVS_CONTROL; | |
310 | int vsel, ret; | |
311 | ||
312 | vsel = wm831x_buckv_select_min_voltage(rdev, min_uV, max_uV); | |
313 | if (vsel < 0) | |
314 | return vsel; | |
315 | ||
316 | /* If this value is already set then do a GPIO update if we can */ | |
317 | if (dcdc->dvs_gpio && dcdc->on_vsel == vsel) | |
318 | return wm831x_buckv_set_dvs(rdev, 0); | |
319 | ||
320 | if (dcdc->dvs_gpio && dcdc->dvs_vsel == vsel) | |
321 | return wm831x_buckv_set_dvs(rdev, 1); | |
322 | ||
323 | /* Always set the ON status to the minimum voltage */ | |
324 | ret = wm831x_set_bits(wm831x, on_reg, WM831X_DC1_ON_VSEL_MASK, vsel); | |
325 | if (ret < 0) | |
326 | return ret; | |
327 | dcdc->on_vsel = vsel; | |
328 | ||
329 | if (!dcdc->dvs_gpio) | |
330 | return ret; | |
331 | ||
332 | /* Kick the voltage transition now */ | |
333 | ret = wm831x_buckv_set_dvs(rdev, 0); | |
334 | if (ret < 0) | |
335 | return ret; | |
336 | ||
337 | /* Set the high voltage as the DVS voltage. This is optimised | |
338 | * for CPUfreq usage, most processors will keep the maximum | |
339 | * voltage constant and lower the minimum with the frequency. */ | |
340 | vsel = wm831x_buckv_select_max_voltage(rdev, min_uV, max_uV); | |
341 | if (vsel < 0) { | |
342 | /* This should never happen - at worst the same vsel | |
343 | * should be chosen */ | |
344 | WARN_ON(vsel < 0); | |
345 | return 0; | |
346 | } | |
347 | ||
348 | /* Don't bother if it's the same VSEL we're already using */ | |
349 | if (vsel == dcdc->on_vsel) | |
350 | return 0; | |
e4ee831f | 351 | |
e24a04c4 MB |
352 | ret = wm831x_set_bits(wm831x, dvs_reg, WM831X_DC1_DVS_VSEL_MASK, vsel); |
353 | if (ret == 0) | |
354 | dcdc->dvs_vsel = vsel; | |
355 | else | |
356 | dev_warn(wm831x->dev, "Failed to set DCDC DVS VSEL: %d\n", | |
357 | ret); | |
358 | ||
359 | return 0; | |
e4ee831f MB |
360 | } |
361 | ||
362 | static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev, | |
e24a04c4 | 363 | int uV) |
e4ee831f MB |
364 | { |
365 | struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); | |
e24a04c4 | 366 | struct wm831x *wm831x = dcdc->wm831x; |
e4ee831f | 367 | u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; |
e24a04c4 MB |
368 | int vsel; |
369 | ||
370 | vsel = wm831x_buckv_select_min_voltage(rdev, uV, uV); | |
371 | if (vsel < 0) | |
372 | return vsel; | |
e4ee831f | 373 | |
e24a04c4 | 374 | return wm831x_set_bits(wm831x, reg, WM831X_DC1_SLP_VSEL_MASK, vsel); |
e4ee831f MB |
375 | } |
376 | ||
377 | static int wm831x_buckv_get_voltage(struct regulator_dev *rdev) | |
378 | { | |
379 | struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); | |
e4ee831f | 380 | |
e24a04c4 MB |
381 | if (dcdc->dvs_gpio && dcdc->dvs_gpio_state) |
382 | return wm831x_buckv_list_voltage(rdev, dcdc->dvs_vsel); | |
383 | else | |
384 | return wm831x_buckv_list_voltage(rdev, dcdc->on_vsel); | |
e4ee831f MB |
385 | } |
386 | ||
387 | /* Current limit options */ | |
388 | static u16 wm831x_dcdc_ilim[] = { | |
389 | 125, 250, 375, 500, 625, 750, 875, 1000 | |
390 | }; | |
391 | ||
392 | static int wm831x_buckv_set_current_limit(struct regulator_dev *rdev, | |
393 | int min_uA, int max_uA) | |
394 | { | |
395 | struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); | |
396 | struct wm831x *wm831x = dcdc->wm831x; | |
397 | u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; | |
398 | int i; | |
399 | ||
400 | for (i = 0; i < ARRAY_SIZE(wm831x_dcdc_ilim); i++) { | |
401 | if (max_uA <= wm831x_dcdc_ilim[i]) | |
402 | break; | |
403 | } | |
404 | if (i == ARRAY_SIZE(wm831x_dcdc_ilim)) | |
405 | return -EINVAL; | |
406 | ||
407 | return wm831x_set_bits(wm831x, reg, WM831X_DC1_HC_THR_MASK, i); | |
408 | } | |
409 | ||
410 | static int wm831x_buckv_get_current_limit(struct regulator_dev *rdev) | |
411 | { | |
412 | struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); | |
413 | struct wm831x *wm831x = dcdc->wm831x; | |
414 | u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; | |
415 | int val; | |
416 | ||
417 | val = wm831x_reg_read(wm831x, reg); | |
418 | if (val < 0) | |
419 | return val; | |
420 | ||
421 | return wm831x_dcdc_ilim[val & WM831X_DC1_HC_THR_MASK]; | |
422 | } | |
423 | ||
424 | static struct regulator_ops wm831x_buckv_ops = { | |
425 | .set_voltage = wm831x_buckv_set_voltage, | |
426 | .get_voltage = wm831x_buckv_get_voltage, | |
427 | .list_voltage = wm831x_buckv_list_voltage, | |
428 | .set_suspend_voltage = wm831x_buckv_set_suspend_voltage, | |
429 | .set_current_limit = wm831x_buckv_set_current_limit, | |
430 | .get_current_limit = wm831x_buckv_get_current_limit, | |
431 | ||
432 | .is_enabled = wm831x_dcdc_is_enabled, | |
433 | .enable = wm831x_dcdc_enable, | |
434 | .disable = wm831x_dcdc_disable, | |
435 | .get_status = wm831x_dcdc_get_status, | |
436 | .get_mode = wm831x_dcdc_get_mode, | |
437 | .set_mode = wm831x_dcdc_set_mode, | |
438 | .set_suspend_mode = wm831x_dcdc_set_suspend_mode, | |
439 | }; | |
440 | ||
e24a04c4 MB |
441 | /* |
442 | * Set up DVS control. We just log errors since we can still run | |
443 | * (with reduced performance) if we fail. | |
444 | */ | |
445 | static __devinit void wm831x_buckv_dvs_init(struct wm831x_dcdc *dcdc, | |
446 | struct wm831x_buckv_pdata *pdata) | |
447 | { | |
448 | struct wm831x *wm831x = dcdc->wm831x; | |
449 | int ret; | |
450 | u16 ctrl; | |
451 | ||
452 | if (!pdata || !pdata->dvs_gpio) | |
453 | return; | |
454 | ||
455 | switch (pdata->dvs_control_src) { | |
456 | case 1: | |
457 | ctrl = 2 << WM831X_DC1_DVS_SRC_SHIFT; | |
458 | break; | |
459 | case 2: | |
460 | ctrl = 3 << WM831X_DC1_DVS_SRC_SHIFT; | |
461 | break; | |
462 | default: | |
463 | dev_err(wm831x->dev, "Invalid DVS control source %d for %s\n", | |
464 | pdata->dvs_control_src, dcdc->name); | |
465 | return; | |
466 | } | |
467 | ||
468 | ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL, | |
469 | WM831X_DC1_DVS_SRC_MASK, ctrl); | |
470 | if (ret < 0) { | |
471 | dev_err(wm831x->dev, "Failed to set %s DVS source: %d\n", | |
472 | dcdc->name, ret); | |
473 | return; | |
474 | } | |
475 | ||
476 | ret = gpio_request(pdata->dvs_gpio, "DCDC DVS"); | |
477 | if (ret < 0) { | |
478 | dev_err(wm831x->dev, "Failed to get %s DVS GPIO: %d\n", | |
479 | dcdc->name, ret); | |
480 | return; | |
481 | } | |
482 | ||
483 | /* gpiolib won't let us read the GPIO status so pick the higher | |
484 | * of the two existing voltages so we take it as platform data. | |
485 | */ | |
486 | dcdc->dvs_gpio_state = pdata->dvs_init_state; | |
487 | ||
488 | ret = gpio_direction_output(pdata->dvs_gpio, dcdc->dvs_gpio_state); | |
489 | if (ret < 0) { | |
490 | dev_err(wm831x->dev, "Failed to enable %s DVS GPIO: %d\n", | |
491 | dcdc->name, ret); | |
492 | gpio_free(pdata->dvs_gpio); | |
493 | return; | |
494 | } | |
495 | ||
496 | dcdc->dvs_gpio = pdata->dvs_gpio; | |
497 | } | |
498 | ||
e4ee831f MB |
499 | static __devinit int wm831x_buckv_probe(struct platform_device *pdev) |
500 | { | |
501 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
502 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
503 | int id = pdev->id % ARRAY_SIZE(pdata->dcdc); | |
504 | struct wm831x_dcdc *dcdc; | |
505 | struct resource *res; | |
506 | int ret, irq; | |
507 | ||
508 | dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); | |
509 | ||
510 | if (pdata == NULL || pdata->dcdc[id] == NULL) | |
511 | return -ENODEV; | |
512 | ||
513 | dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); | |
514 | if (dcdc == NULL) { | |
515 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
516 | return -ENOMEM; | |
517 | } | |
518 | ||
519 | dcdc->wm831x = wm831x; | |
520 | ||
521 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
522 | if (res == NULL) { | |
523 | dev_err(&pdev->dev, "No I/O resource\n"); | |
524 | ret = -EINVAL; | |
525 | goto err; | |
526 | } | |
527 | dcdc->base = res->start; | |
528 | ||
529 | snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); | |
530 | dcdc->desc.name = dcdc->name; | |
531 | dcdc->desc.id = id; | |
532 | dcdc->desc.type = REGULATOR_VOLTAGE; | |
533 | dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1; | |
534 | dcdc->desc.ops = &wm831x_buckv_ops; | |
535 | dcdc->desc.owner = THIS_MODULE; | |
536 | ||
e24a04c4 MB |
537 | ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG); |
538 | if (ret < 0) { | |
539 | dev_err(wm831x->dev, "Failed to read ON VSEL: %d\n", ret); | |
540 | goto err; | |
541 | } | |
542 | dcdc->on_vsel = ret & WM831X_DC1_ON_VSEL_MASK; | |
543 | ||
544 | ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG); | |
545 | if (ret < 0) { | |
546 | dev_err(wm831x->dev, "Failed to read DVS VSEL: %d\n", ret); | |
547 | goto err; | |
548 | } | |
549 | dcdc->dvs_vsel = ret & WM831X_DC1_DVS_VSEL_MASK; | |
550 | ||
551 | if (pdata->dcdc[id]) | |
552 | wm831x_buckv_dvs_init(dcdc, pdata->dcdc[id]->driver_data); | |
553 | ||
e4ee831f MB |
554 | dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, |
555 | pdata->dcdc[id], dcdc); | |
556 | if (IS_ERR(dcdc->regulator)) { | |
557 | ret = PTR_ERR(dcdc->regulator); | |
558 | dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", | |
559 | id + 1, ret); | |
560 | goto err; | |
561 | } | |
562 | ||
563 | irq = platform_get_irq_byname(pdev, "UV"); | |
564 | ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_uv_irq, | |
565 | IRQF_TRIGGER_RISING, dcdc->name, | |
566 | dcdc); | |
567 | if (ret != 0) { | |
568 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
569 | irq, ret); | |
570 | goto err_regulator; | |
571 | } | |
572 | ||
573 | irq = platform_get_irq_byname(pdev, "HC"); | |
574 | ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_oc_irq, | |
575 | IRQF_TRIGGER_RISING, dcdc->name, | |
576 | dcdc); | |
577 | if (ret != 0) { | |
578 | dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n", | |
579 | irq, ret); | |
580 | goto err_uv; | |
581 | } | |
582 | ||
583 | platform_set_drvdata(pdev, dcdc); | |
584 | ||
585 | return 0; | |
586 | ||
587 | err_uv: | |
588 | wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); | |
589 | err_regulator: | |
590 | regulator_unregister(dcdc->regulator); | |
591 | err: | |
e24a04c4 MB |
592 | if (dcdc->dvs_gpio) |
593 | gpio_free(dcdc->dvs_gpio); | |
e4ee831f MB |
594 | kfree(dcdc); |
595 | return ret; | |
596 | } | |
597 | ||
598 | static __devexit int wm831x_buckv_remove(struct platform_device *pdev) | |
599 | { | |
600 | struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); | |
601 | struct wm831x *wm831x = dcdc->wm831x; | |
602 | ||
603 | wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "HC"), dcdc); | |
604 | wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); | |
605 | regulator_unregister(dcdc->regulator); | |
e24a04c4 MB |
606 | if (dcdc->dvs_gpio) |
607 | gpio_free(dcdc->dvs_gpio); | |
e4ee831f MB |
608 | kfree(dcdc); |
609 | ||
610 | return 0; | |
611 | } | |
612 | ||
613 | static struct platform_driver wm831x_buckv_driver = { | |
614 | .probe = wm831x_buckv_probe, | |
615 | .remove = __devexit_p(wm831x_buckv_remove), | |
616 | .driver = { | |
617 | .name = "wm831x-buckv", | |
618 | }, | |
619 | }; | |
620 | ||
621 | /* | |
622 | * BUCKP specifics | |
623 | */ | |
624 | ||
625 | static int wm831x_buckp_list_voltage(struct regulator_dev *rdev, | |
626 | unsigned selector) | |
627 | { | |
628 | if (selector <= WM831X_BUCKP_MAX_SELECTOR) | |
629 | return 850000 + (selector * 25000); | |
630 | else | |
631 | return -EINVAL; | |
632 | } | |
633 | ||
634 | static int wm831x_buckp_set_voltage_int(struct regulator_dev *rdev, int reg, | |
635 | int min_uV, int max_uV) | |
636 | { | |
637 | struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); | |
638 | struct wm831x *wm831x = dcdc->wm831x; | |
639 | u16 vsel; | |
640 | ||
641 | if (min_uV <= 34000000) | |
642 | vsel = (min_uV - 850000) / 25000; | |
643 | else | |
644 | return -EINVAL; | |
645 | ||
646 | if (wm831x_buckp_list_voltage(rdev, vsel) > max_uV) | |
647 | return -EINVAL; | |
648 | ||
649 | return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, vsel); | |
650 | } | |
651 | ||
652 | static int wm831x_buckp_set_voltage(struct regulator_dev *rdev, | |
653 | int min_uV, int max_uV) | |
654 | { | |
655 | struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); | |
656 | u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; | |
657 | ||
658 | return wm831x_buckp_set_voltage_int(rdev, reg, min_uV, max_uV); | |
659 | } | |
660 | ||
661 | static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev, | |
662 | int uV) | |
663 | { | |
664 | struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); | |
665 | u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; | |
666 | ||
667 | return wm831x_buckp_set_voltage_int(rdev, reg, uV, uV); | |
668 | } | |
669 | ||
670 | static int wm831x_buckp_get_voltage(struct regulator_dev *rdev) | |
671 | { | |
672 | struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); | |
673 | struct wm831x *wm831x = dcdc->wm831x; | |
674 | u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; | |
675 | int val; | |
676 | ||
677 | val = wm831x_reg_read(wm831x, reg); | |
678 | if (val < 0) | |
679 | return val; | |
680 | ||
681 | return wm831x_buckp_list_voltage(rdev, val & WM831X_DC3_ON_VSEL_MASK); | |
682 | } | |
683 | ||
684 | static struct regulator_ops wm831x_buckp_ops = { | |
685 | .set_voltage = wm831x_buckp_set_voltage, | |
686 | .get_voltage = wm831x_buckp_get_voltage, | |
687 | .list_voltage = wm831x_buckp_list_voltage, | |
688 | .set_suspend_voltage = wm831x_buckp_set_suspend_voltage, | |
689 | ||
690 | .is_enabled = wm831x_dcdc_is_enabled, | |
691 | .enable = wm831x_dcdc_enable, | |
692 | .disable = wm831x_dcdc_disable, | |
693 | .get_status = wm831x_dcdc_get_status, | |
694 | .get_mode = wm831x_dcdc_get_mode, | |
695 | .set_mode = wm831x_dcdc_set_mode, | |
696 | .set_suspend_mode = wm831x_dcdc_set_suspend_mode, | |
697 | }; | |
698 | ||
699 | static __devinit int wm831x_buckp_probe(struct platform_device *pdev) | |
700 | { | |
701 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
702 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
703 | int id = pdev->id % ARRAY_SIZE(pdata->dcdc); | |
704 | struct wm831x_dcdc *dcdc; | |
705 | struct resource *res; | |
706 | int ret, irq; | |
707 | ||
708 | dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); | |
709 | ||
710 | if (pdata == NULL || pdata->dcdc[id] == NULL) | |
711 | return -ENODEV; | |
712 | ||
713 | dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); | |
714 | if (dcdc == NULL) { | |
715 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
716 | return -ENOMEM; | |
717 | } | |
718 | ||
719 | dcdc->wm831x = wm831x; | |
720 | ||
721 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
722 | if (res == NULL) { | |
723 | dev_err(&pdev->dev, "No I/O resource\n"); | |
724 | ret = -EINVAL; | |
725 | goto err; | |
726 | } | |
727 | dcdc->base = res->start; | |
728 | ||
729 | snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); | |
730 | dcdc->desc.name = dcdc->name; | |
731 | dcdc->desc.id = id; | |
732 | dcdc->desc.type = REGULATOR_VOLTAGE; | |
733 | dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1; | |
734 | dcdc->desc.ops = &wm831x_buckp_ops; | |
735 | dcdc->desc.owner = THIS_MODULE; | |
736 | ||
737 | dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, | |
738 | pdata->dcdc[id], dcdc); | |
739 | if (IS_ERR(dcdc->regulator)) { | |
740 | ret = PTR_ERR(dcdc->regulator); | |
741 | dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", | |
742 | id + 1, ret); | |
743 | goto err; | |
744 | } | |
745 | ||
746 | irq = platform_get_irq_byname(pdev, "UV"); | |
747 | ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_uv_irq, | |
748 | IRQF_TRIGGER_RISING, dcdc->name, | |
749 | dcdc); | |
750 | if (ret != 0) { | |
751 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
752 | irq, ret); | |
753 | goto err_regulator; | |
754 | } | |
755 | ||
756 | platform_set_drvdata(pdev, dcdc); | |
757 | ||
758 | return 0; | |
759 | ||
760 | err_regulator: | |
761 | regulator_unregister(dcdc->regulator); | |
762 | err: | |
763 | kfree(dcdc); | |
764 | return ret; | |
765 | } | |
766 | ||
767 | static __devexit int wm831x_buckp_remove(struct platform_device *pdev) | |
768 | { | |
769 | struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); | |
770 | struct wm831x *wm831x = dcdc->wm831x; | |
771 | ||
772 | wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); | |
773 | regulator_unregister(dcdc->regulator); | |
774 | kfree(dcdc); | |
775 | ||
776 | return 0; | |
777 | } | |
778 | ||
779 | static struct platform_driver wm831x_buckp_driver = { | |
780 | .probe = wm831x_buckp_probe, | |
781 | .remove = __devexit_p(wm831x_buckp_remove), | |
782 | .driver = { | |
783 | .name = "wm831x-buckp", | |
784 | }, | |
785 | }; | |
786 | ||
1304850d MB |
787 | /* |
788 | * DCDC boost convertors | |
789 | */ | |
790 | ||
791 | static int wm831x_boostp_get_status(struct regulator_dev *rdev) | |
792 | { | |
793 | struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); | |
794 | struct wm831x *wm831x = dcdc->wm831x; | |
795 | int ret; | |
796 | ||
797 | /* First, check for errors */ | |
798 | ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); | |
799 | if (ret < 0) | |
800 | return ret; | |
801 | ||
802 | if (ret & (1 << rdev_get_id(rdev))) { | |
803 | dev_dbg(wm831x->dev, "DCDC%d under voltage\n", | |
804 | rdev_get_id(rdev) + 1); | |
805 | return REGULATOR_STATUS_ERROR; | |
806 | } | |
807 | ||
808 | /* Is the regulator on? */ | |
809 | ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); | |
810 | if (ret < 0) | |
811 | return ret; | |
812 | if (ret & (1 << rdev_get_id(rdev))) | |
813 | return REGULATOR_STATUS_ON; | |
814 | else | |
815 | return REGULATOR_STATUS_OFF; | |
816 | } | |
817 | ||
818 | static struct regulator_ops wm831x_boostp_ops = { | |
819 | .get_status = wm831x_boostp_get_status, | |
820 | ||
821 | .is_enabled = wm831x_dcdc_is_enabled, | |
822 | .enable = wm831x_dcdc_enable, | |
823 | .disable = wm831x_dcdc_disable, | |
824 | }; | |
825 | ||
826 | static __devinit int wm831x_boostp_probe(struct platform_device *pdev) | |
827 | { | |
828 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
829 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
830 | int id = pdev->id % ARRAY_SIZE(pdata->dcdc); | |
831 | struct wm831x_dcdc *dcdc; | |
832 | struct resource *res; | |
833 | int ret, irq; | |
834 | ||
835 | dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); | |
836 | ||
837 | if (pdata == NULL || pdata->dcdc[id] == NULL) | |
838 | return -ENODEV; | |
839 | ||
840 | dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); | |
841 | if (dcdc == NULL) { | |
842 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
843 | return -ENOMEM; | |
844 | } | |
845 | ||
846 | dcdc->wm831x = wm831x; | |
847 | ||
848 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
849 | if (res == NULL) { | |
850 | dev_err(&pdev->dev, "No I/O resource\n"); | |
851 | ret = -EINVAL; | |
852 | goto err; | |
853 | } | |
854 | dcdc->base = res->start; | |
855 | ||
856 | snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); | |
857 | dcdc->desc.name = dcdc->name; | |
858 | dcdc->desc.id = id; | |
859 | dcdc->desc.type = REGULATOR_VOLTAGE; | |
860 | dcdc->desc.ops = &wm831x_boostp_ops; | |
861 | dcdc->desc.owner = THIS_MODULE; | |
862 | ||
863 | dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, | |
864 | pdata->dcdc[id], dcdc); | |
865 | if (IS_ERR(dcdc->regulator)) { | |
866 | ret = PTR_ERR(dcdc->regulator); | |
867 | dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", | |
868 | id + 1, ret); | |
869 | goto err; | |
870 | } | |
871 | ||
872 | irq = platform_get_irq_byname(pdev, "UV"); | |
873 | ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_uv_irq, | |
874 | IRQF_TRIGGER_RISING, dcdc->name, | |
875 | dcdc); | |
876 | if (ret != 0) { | |
877 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
878 | irq, ret); | |
879 | goto err_regulator; | |
880 | } | |
881 | ||
882 | platform_set_drvdata(pdev, dcdc); | |
883 | ||
884 | return 0; | |
885 | ||
886 | err_regulator: | |
887 | regulator_unregister(dcdc->regulator); | |
888 | err: | |
889 | kfree(dcdc); | |
890 | return ret; | |
891 | } | |
892 | ||
893 | static __devexit int wm831x_boostp_remove(struct platform_device *pdev) | |
894 | { | |
895 | struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); | |
896 | struct wm831x *wm831x = dcdc->wm831x; | |
897 | ||
898 | wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc); | |
899 | regulator_unregister(dcdc->regulator); | |
900 | kfree(dcdc); | |
901 | ||
902 | return 0; | |
903 | } | |
904 | ||
905 | static struct platform_driver wm831x_boostp_driver = { | |
906 | .probe = wm831x_boostp_probe, | |
907 | .remove = __devexit_p(wm831x_boostp_remove), | |
908 | .driver = { | |
909 | .name = "wm831x-boostp", | |
910 | }, | |
911 | }; | |
912 | ||
8267a9ba MB |
913 | /* |
914 | * External Power Enable | |
915 | * | |
916 | * These aren't actually DCDCs but look like them in hardware so share | |
917 | * code. | |
918 | */ | |
919 | ||
920 | #define WM831X_EPE_BASE 6 | |
921 | ||
922 | static struct regulator_ops wm831x_epe_ops = { | |
923 | .is_enabled = wm831x_dcdc_is_enabled, | |
924 | .enable = wm831x_dcdc_enable, | |
925 | .disable = wm831x_dcdc_disable, | |
926 | .get_status = wm831x_dcdc_get_status, | |
927 | }; | |
928 | ||
929 | static __devinit int wm831x_epe_probe(struct platform_device *pdev) | |
930 | { | |
931 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
932 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
933 | int id = pdev->id % ARRAY_SIZE(pdata->epe); | |
934 | struct wm831x_dcdc *dcdc; | |
935 | int ret; | |
936 | ||
937 | dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1); | |
938 | ||
939 | if (pdata == NULL || pdata->epe[id] == NULL) | |
940 | return -ENODEV; | |
941 | ||
942 | dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL); | |
943 | if (dcdc == NULL) { | |
944 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
945 | return -ENOMEM; | |
946 | } | |
947 | ||
948 | dcdc->wm831x = wm831x; | |
949 | ||
950 | /* For current parts this is correct; probably need to revisit | |
951 | * in future. | |
952 | */ | |
953 | snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1); | |
954 | dcdc->desc.name = dcdc->name; | |
955 | dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */ | |
956 | dcdc->desc.ops = &wm831x_epe_ops; | |
957 | dcdc->desc.type = REGULATOR_VOLTAGE; | |
958 | dcdc->desc.owner = THIS_MODULE; | |
959 | ||
960 | dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, | |
961 | pdata->epe[id], dcdc); | |
962 | if (IS_ERR(dcdc->regulator)) { | |
963 | ret = PTR_ERR(dcdc->regulator); | |
964 | dev_err(wm831x->dev, "Failed to register EPE%d: %d\n", | |
965 | id + 1, ret); | |
966 | goto err; | |
967 | } | |
968 | ||
969 | platform_set_drvdata(pdev, dcdc); | |
970 | ||
971 | return 0; | |
972 | ||
973 | err: | |
974 | kfree(dcdc); | |
975 | return ret; | |
976 | } | |
977 | ||
978 | static __devexit int wm831x_epe_remove(struct platform_device *pdev) | |
979 | { | |
980 | struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); | |
981 | ||
982 | regulator_unregister(dcdc->regulator); | |
983 | kfree(dcdc); | |
984 | ||
985 | return 0; | |
986 | } | |
987 | ||
988 | static struct platform_driver wm831x_epe_driver = { | |
989 | .probe = wm831x_epe_probe, | |
990 | .remove = __devexit_p(wm831x_epe_remove), | |
991 | .driver = { | |
992 | .name = "wm831x-epe", | |
993 | }, | |
994 | }; | |
995 | ||
e4ee831f MB |
996 | static int __init wm831x_dcdc_init(void) |
997 | { | |
998 | int ret; | |
999 | ret = platform_driver_register(&wm831x_buckv_driver); | |
1000 | if (ret != 0) | |
1001 | pr_err("Failed to register WM831x BUCKV driver: %d\n", ret); | |
1002 | ||
1003 | ret = platform_driver_register(&wm831x_buckp_driver); | |
1004 | if (ret != 0) | |
1005 | pr_err("Failed to register WM831x BUCKP driver: %d\n", ret); | |
1006 | ||
1304850d MB |
1007 | ret = platform_driver_register(&wm831x_boostp_driver); |
1008 | if (ret != 0) | |
1009 | pr_err("Failed to register WM831x BOOST driver: %d\n", ret); | |
1010 | ||
8267a9ba MB |
1011 | ret = platform_driver_register(&wm831x_epe_driver); |
1012 | if (ret != 0) | |
1013 | pr_err("Failed to register WM831x EPE driver: %d\n", ret); | |
1014 | ||
e4ee831f MB |
1015 | return 0; |
1016 | } | |
1017 | subsys_initcall(wm831x_dcdc_init); | |
1018 | ||
1019 | static void __exit wm831x_dcdc_exit(void) | |
1020 | { | |
8267a9ba | 1021 | platform_driver_unregister(&wm831x_epe_driver); |
1304850d | 1022 | platform_driver_unregister(&wm831x_boostp_driver); |
e4ee831f MB |
1023 | platform_driver_unregister(&wm831x_buckp_driver); |
1024 | platform_driver_unregister(&wm831x_buckv_driver); | |
1025 | } | |
1026 | module_exit(wm831x_dcdc_exit); | |
1027 | ||
1028 | /* Module information */ | |
1029 | MODULE_AUTHOR("Mark Brown"); | |
1030 | MODULE_DESCRIPTION("WM831x DC-DC convertor driver"); | |
1031 | MODULE_LICENSE("GPL"); | |
1032 | MODULE_ALIAS("platform:wm831x-buckv"); | |
1033 | MODULE_ALIAS("platform:wm831x-buckp"); |