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mfd: Don't try to flag IRQ 0 as a wm831x wake source
[linux-2.6-block.git] / drivers / regulator / wm831x-dcdc.c
CommitLineData
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>
5a0e3ad6 24#include <linux/slab.h>
e4ee831f
MB		 25
26#include <linux/mfd/wm831x/core.h>
27#include <linux/mfd/wm831x/regulator.h>
28#include <linux/mfd/wm831x/pdata.h>
29
30#define WM831X_BUCKV_MAX_SELECTOR 0x68
31#define WM831X_BUCKP_MAX_SELECTOR 0x66
32
33#define WM831X_DCDC_MODE_FAST 0
34#define WM831X_DCDC_MODE_NORMAL 1
35#define WM831X_DCDC_MODE_IDLE 2
36#define WM831X_DCDC_MODE_STANDBY 3
37
38#define WM831X_DCDC_MAX_NAME 6
39
40/* Register offsets in control block */
41#define WM831X_DCDC_CONTROL_1 0
42#define WM831X_DCDC_CONTROL_2 1
43#define WM831X_DCDC_ON_CONFIG 2
44#define WM831X_DCDC_SLEEP_CONTROL 3
e24a04c4 45#define WM831X_DCDC_DVS_CONTROL 4
e4ee831f
MB		 46
47/*
48 * Shared
49 */
50
51struct wm831x_dcdc {
52 char name[WM831X_DCDC_MAX_NAME];
53 struct regulator_desc desc;
54 int base;
55 struct wm831x *wm831x;
56 struct regulator_dev *regulator;
e24a04c4
MB		 57 int dvs_gpio;
58 int dvs_gpio_state;
59 int on_vsel;
60 int dvs_vsel;
e4ee831f
MB		 61};
62
63static int wm831x_dcdc_is_enabled(struct regulator_dev *rdev)
64{
65 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
66 struct wm831x *wm831x = dcdc->wm831x;
67 int mask = 1 << rdev_get_id(rdev);
68 int reg;
69
70 reg = wm831x_reg_read(wm831x, WM831X_DCDC_ENABLE);
71 if (reg < 0)
72 return reg;
73
74 if (reg & mask)
75 return 1;
76 else
77 return 0;
78}
79
80static int wm831x_dcdc_enable(struct regulator_dev *rdev)
81{
82 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
83 struct wm831x *wm831x = dcdc->wm831x;
84 int mask = 1 << rdev_get_id(rdev);
85
86 return wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, mask, mask);
87}
88
89static int wm831x_dcdc_disable(struct regulator_dev *rdev)
90{
91 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
92 struct wm831x *wm831x = dcdc->wm831x;
93 int mask = 1 << rdev_get_id(rdev);
94
95 return wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, mask, 0);
96}
97
98static unsigned int wm831x_dcdc_get_mode(struct regulator_dev *rdev)
99
100{
101 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
102 struct wm831x *wm831x = dcdc->wm831x;
103 u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
104 int val;
105
106 val = wm831x_reg_read(wm831x, reg);
107 if (val < 0)
108 return val;
109
110 val = (val & WM831X_DC1_ON_MODE_MASK) >> WM831X_DC1_ON_MODE_SHIFT;
111
112 switch (val) {
113 case WM831X_DCDC_MODE_FAST:
114 return REGULATOR_MODE_FAST;
115 case WM831X_DCDC_MODE_NORMAL:
116 return REGULATOR_MODE_NORMAL;
117 case WM831X_DCDC_MODE_STANDBY:
118 return REGULATOR_MODE_STANDBY;
119 case WM831X_DCDC_MODE_IDLE:
120 return REGULATOR_MODE_IDLE;
121 default:
122 BUG();
9ee291a4 123 return -EINVAL;
e4ee831f
MB		 124 }
125}
126
127static int wm831x_dcdc_set_mode_int(struct wm831x *wm831x, int reg,
128 unsigned int mode)
129{
130 int val;
131
132 switch (mode) {
133 case REGULATOR_MODE_FAST:
134 val = WM831X_DCDC_MODE_FAST;
135 break;
136 case REGULATOR_MODE_NORMAL:
137 val = WM831X_DCDC_MODE_NORMAL;
138 break;
139 case REGULATOR_MODE_STANDBY:
140 val = WM831X_DCDC_MODE_STANDBY;
141 break;
142 case REGULATOR_MODE_IDLE:
143 val = WM831X_DCDC_MODE_IDLE;
144 break;
145 default:
146 return -EINVAL;
147 }
148
149 return wm831x_set_bits(wm831x, reg, WM831X_DC1_ON_MODE_MASK,
150 val << WM831X_DC1_ON_MODE_SHIFT);
151}
152
153static int wm831x_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode)
154{
155 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
156 struct wm831x *wm831x = dcdc->wm831x;
157 u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
158
159 return wm831x_dcdc_set_mode_int(wm831x, reg, mode);
160}
161
162static int wm831x_dcdc_set_suspend_mode(struct regulator_dev *rdev,
163 unsigned int mode)
164{
165 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
166 struct wm831x *wm831x = dcdc->wm831x;
167 u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
168
169 return wm831x_dcdc_set_mode_int(wm831x, reg, mode);
170}
171
172static int wm831x_dcdc_get_status(struct regulator_dev *rdev)
173{
174 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
175 struct wm831x *wm831x = dcdc->wm831x;
176 int ret;
177
178 /* First, check for errors */
179 ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS);
180 if (ret < 0)
181 return ret;
182
183 if (ret & (1 << rdev_get_id(rdev))) {
184 dev_dbg(wm831x->dev, "DCDC%d under voltage\n",
185 rdev_get_id(rdev) + 1);
186 return REGULATOR_STATUS_ERROR;
187 }
188
189 /* DCDC1 and DCDC2 can additionally detect high voltage/current */
190 if (rdev_get_id(rdev) < 2) {
191 if (ret & (WM831X_DC1_OV_STS << rdev_get_id(rdev))) {
192 dev_dbg(wm831x->dev, "DCDC%d over voltage\n",
193 rdev_get_id(rdev) + 1);
194 return REGULATOR_STATUS_ERROR;
195 }
196
197 if (ret & (WM831X_DC1_HC_STS << rdev_get_id(rdev))) {
198 dev_dbg(wm831x->dev, "DCDC%d over current\n",
199 rdev_get_id(rdev) + 1);
200 return REGULATOR_STATUS_ERROR;
201 }
202 }
203
204 /* Is the regulator on? */
205 ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS);
206 if (ret < 0)
207 return ret;
208 if (!(ret & (1 << rdev_get_id(rdev))))
209 return REGULATOR_STATUS_OFF;
210
211 /* TODO: When we handle hardware control modes so we can report the
212 * current mode. */
213 return REGULATOR_STATUS_ON;
214}
215
216static irqreturn_t wm831x_dcdc_uv_irq(int irq, void *data)
217{
218 struct wm831x_dcdc *dcdc = data;
219
220 regulator_notifier_call_chain(dcdc->regulator,
221 REGULATOR_EVENT_UNDER_VOLTAGE,
222 NULL);
223
224 return IRQ_HANDLED;
225}
226
227static irqreturn_t wm831x_dcdc_oc_irq(int irq, void *data)
228{
229 struct wm831x_dcdc *dcdc = data;
230
231 regulator_notifier_call_chain(dcdc->regulator,
232 REGULATOR_EVENT_OVER_CURRENT,
233 NULL);
234
235 return IRQ_HANDLED;
236}
237
238/*
239 * BUCKV specifics
240 */
241
242static int wm831x_buckv_list_voltage(struct regulator_dev *rdev,
243 unsigned selector)
244{
245 if (selector <= 0x8)
246 return 600000;
247 if (selector <= WM831X_BUCKV_MAX_SELECTOR)
248 return 600000 + ((selector - 0x8) * 12500);
249 return -EINVAL;
250}
251
e24a04c4
MB		 252static int wm831x_buckv_select_min_voltage(struct regulator_dev *rdev,
253 int min_uV, int max_uV)
e4ee831f 254{
e4ee831f
MB		 255 u16 vsel;
256
257 if (min_uV < 600000)
258 vsel = 0;
259 else if (min_uV <= 1800000)
260 vsel = ((min_uV - 600000) / 12500) + 8;
261 else
262 return -EINVAL;
263
264 if (wm831x_buckv_list_voltage(rdev, vsel) > max_uV)
265 return -EINVAL;
266
e24a04c4
MB		 267 return vsel;
268}
269
e24a04c4
MB		 270static int wm831x_buckv_set_dvs(struct regulator_dev *rdev, int state)
271{
272 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
273
274 if (state == dcdc->dvs_gpio_state)
275 return 0;
276
277 dcdc->dvs_gpio_state = state;
278 gpio_set_value(dcdc->dvs_gpio, state);
279
280 /* Should wait for DVS state change to be asserted if we have
281 * a GPIO for it, for now assume the device is configured
282 * for the fastest possible transition.
283 */
284
285 return 0;
e4ee831f
MB		 286}
287
288static int wm831x_buckv_set_voltage(struct regulator_dev *rdev,
3a93f2a9 289 int min_uV, int max_uV, unsigned *selector)
e4ee831f
MB		 290{
291 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
e24a04c4
MB		 292 struct wm831x *wm831x = dcdc->wm831x;
293 int on_reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
294 int dvs_reg = dcdc->base + WM831X_DCDC_DVS_CONTROL;
295 int vsel, ret;
296
297 vsel = wm831x_buckv_select_min_voltage(rdev, min_uV, max_uV);
298 if (vsel < 0)
299 return vsel;
300
3a93f2a9
MB		 301 *selector = vsel;
302
e24a04c4
MB		 303 /* If this value is already set then do a GPIO update if we can */
304 if (dcdc->dvs_gpio && dcdc->on_vsel == vsel)
305 return wm831x_buckv_set_dvs(rdev, 0);
306
307 if (dcdc->dvs_gpio && dcdc->dvs_vsel == vsel)
308 return wm831x_buckv_set_dvs(rdev, 1);
309
310 /* Always set the ON status to the minimum voltage */
311 ret = wm831x_set_bits(wm831x, on_reg, WM831X_DC1_ON_VSEL_MASK, vsel);
312 if (ret < 0)
313 return ret;
314 dcdc->on_vsel = vsel;
315
316 if (!dcdc->dvs_gpio)
317 return ret;
318
319 /* Kick the voltage transition now */
320 ret = wm831x_buckv_set_dvs(rdev, 0);
321 if (ret < 0)
322 return ret;
323
88cda60e
MB		 324 /*
325 * If this VSEL is higher than the last one we've seen then
326 * remember it as the DVS VSEL. This is optimised for CPUfreq
327 * usage where we want to get to the highest voltage very
328 * quickly.
329 */
330 if (vsel > dcdc->dvs_vsel) {
331 ret = wm831x_set_bits(wm831x, dvs_reg,
332 WM831X_DC1_DVS_VSEL_MASK,
333 dcdc->dvs_vsel);
334 if (ret == 0)
335 dcdc->dvs_vsel = vsel;
336 else
337 dev_warn(wm831x->dev,
338 "Failed to set DCDC DVS VSEL: %d\n", ret);
e24a04c4
MB		 339 }
340
e24a04c4 341 return 0;
e4ee831f
MB		 342}
343
344static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev,
e24a04c4 345 int uV)
e4ee831f
MB		 346{
347 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
e24a04c4 348 struct wm831x *wm831x = dcdc->wm831x;
e4ee831f 349 u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
e24a04c4
MB		 350 int vsel;
351
352 vsel = wm831x_buckv_select_min_voltage(rdev, uV, uV);
353 if (vsel < 0)
354 return vsel;
e4ee831f 355
e24a04c4 356 return wm831x_set_bits(wm831x, reg, WM831X_DC1_SLP_VSEL_MASK, vsel);
e4ee831f
MB		 357}
358
afb8bb80 359static int wm831x_buckv_get_voltage_sel(struct regulator_dev *rdev)
e4ee831f
MB		 360{
361 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
e4ee831f 362
e24a04c4 363 if (dcdc->dvs_gpio && dcdc->dvs_gpio_state)
afb8bb80 364 return dcdc->dvs_vsel;
e24a04c4 365 else
afb8bb80 366 return dcdc->on_vsel;
e4ee831f
MB		 367}
368
369/* Current limit options */
370static u16 wm831x_dcdc_ilim[] = {
371 125, 250, 375, 500, 625, 750, 875, 1000
372};
373
374static int wm831x_buckv_set_current_limit(struct regulator_dev *rdev,
375 int min_uA, int max_uA)
376{
377 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
378 struct wm831x *wm831x = dcdc->wm831x;
379 u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2;
380 int i;
381
382 for (i = 0; i < ARRAY_SIZE(wm831x_dcdc_ilim); i++) {
a171e782
AL		 383 if ((min_uA <= wm831x_dcdc_ilim[i]) &&
384 (wm831x_dcdc_ilim[i] <= max_uA))
e4ee831f
MB		 385 break;
386 }
387 if (i == ARRAY_SIZE(wm831x_dcdc_ilim))
388 return -EINVAL;
389
09bf14b9
AL		 390 return wm831x_set_bits(wm831x, reg, WM831X_DC1_HC_THR_MASK,
391 i << WM831X_DC1_HC_THR_SHIFT);
e4ee831f
MB		 392}
393
394static int wm831x_buckv_get_current_limit(struct regulator_dev *rdev)
395{
396 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
397 struct wm831x *wm831x = dcdc->wm831x;
398 u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2;
399 int val;
400
401 val = wm831x_reg_read(wm831x, reg);
402 if (val < 0)
403 return val;
404
09bf14b9
AL		 405 val = (val & WM831X_DC1_HC_THR_MASK) >> WM831X_DC1_HC_THR_SHIFT;
406 return wm831x_dcdc_ilim[val];
e4ee831f
MB		 407}
408
409static struct regulator_ops wm831x_buckv_ops = {
410 .set_voltage = wm831x_buckv_set_voltage,
afb8bb80 411 .get_voltage_sel = wm831x_buckv_get_voltage_sel,
e4ee831f
MB		 412 .list_voltage = wm831x_buckv_list_voltage,
413 .set_suspend_voltage = wm831x_buckv_set_suspend_voltage,
414 .set_current_limit = wm831x_buckv_set_current_limit,
415 .get_current_limit = wm831x_buckv_get_current_limit,
416
417 .is_enabled = wm831x_dcdc_is_enabled,
418 .enable = wm831x_dcdc_enable,
419 .disable = wm831x_dcdc_disable,
420 .get_status = wm831x_dcdc_get_status,
421 .get_mode = wm831x_dcdc_get_mode,
422 .set_mode = wm831x_dcdc_set_mode,
423 .set_suspend_mode = wm831x_dcdc_set_suspend_mode,
424};
425
e24a04c4
MB		 426/*
427 * Set up DVS control. We just log errors since we can still run
428 * (with reduced performance) if we fail.
429 */
430static __devinit void wm831x_buckv_dvs_init(struct wm831x_dcdc *dcdc,
431 struct wm831x_buckv_pdata *pdata)
432{
433 struct wm831x *wm831x = dcdc->wm831x;
434 int ret;
435 u16 ctrl;
436
437 if (!pdata || !pdata->dvs_gpio)
438 return;
439
e24a04c4
MB		 440 ret = gpio_request(pdata->dvs_gpio, "DCDC DVS");
441 if (ret < 0) {
442 dev_err(wm831x->dev, "Failed to get %s DVS GPIO: %d\n",
443 dcdc->name, ret);
444 return;
445 }
446
447 /* gpiolib won't let us read the GPIO status so pick the higher
448 * of the two existing voltages so we take it as platform data.
449 */
450 dcdc->dvs_gpio_state = pdata->dvs_init_state;
451
452 ret = gpio_direction_output(pdata->dvs_gpio, dcdc->dvs_gpio_state);
453 if (ret < 0) {
454 dev_err(wm831x->dev, "Failed to enable %s DVS GPIO: %d\n",
455 dcdc->name, ret);
456 gpio_free(pdata->dvs_gpio);
457 return;
458 }
459
460 dcdc->dvs_gpio = pdata->dvs_gpio;
b47ba9fd
MB		 461
462 switch (pdata->dvs_control_src) {
463 case 1:
464 ctrl = 2 << WM831X_DC1_DVS_SRC_SHIFT;
465 break;
466 case 2:
467 ctrl = 3 << WM831X_DC1_DVS_SRC_SHIFT;
468 break;
469 default:
470 dev_err(wm831x->dev, "Invalid DVS control source %d for %s\n",
471 pdata->dvs_control_src, dcdc->name);
472 return;
473 }
474
c439b8f4
MB		 475 /* If DVS_VSEL is set to the minimum value then raise it to ON_VSEL
476 * to make bootstrapping a bit smoother.
477 */
478 if (!dcdc->dvs_vsel) {
479 ret = wm831x_set_bits(wm831x,
480 dcdc->base + WM831X_DCDC_DVS_CONTROL,
481 WM831X_DC1_DVS_VSEL_MASK, dcdc->on_vsel);
482 if (ret == 0)
483 dcdc->dvs_vsel = dcdc->on_vsel;
484 else
485 dev_warn(wm831x->dev, "Failed to set DVS_VSEL: %d\n",
486 ret);
487 }
488
b47ba9fd
MB		 489 ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL,
490 WM831X_DC1_DVS_SRC_MASK, ctrl);
491 if (ret < 0) {
492 dev_err(wm831x->dev, "Failed to set %s DVS source: %d\n",
493 dcdc->name, ret);
494 }
e24a04c4
MB		 495}
496
e4ee831f
MB		 497static __devinit int wm831x_buckv_probe(struct platform_device *pdev)
498{
499 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
500 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
137a6354 501 int id;
e4ee831f
MB		 502 struct wm831x_dcdc *dcdc;
503 struct resource *res;
504 int ret, irq;
505
137a6354
MB		 506 if (pdata && pdata->wm831x_num)
507 id = (pdata->wm831x_num * 10) + 1;
508 else
509 id = 0;
510 id = pdev->id - id;
511
e4ee831f
MB		 512 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
513
514 if (pdata == NULL || pdata->dcdc[id] == NULL)
515 return -ENODEV;
516
fded2f4f
MB		 517 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc),
518 GFP_KERNEL);
e4ee831f
MB		 519 if (dcdc == NULL) {
520 dev_err(&pdev->dev, "Unable to allocate private data\n");
521 return -ENOMEM;
522 }
523
524 dcdc->wm831x = wm831x;
525
526 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
527 if (res == NULL) {
528 dev_err(&pdev->dev, "No I/O resource\n");
529 ret = -EINVAL;
530 goto err;
531 }
532 dcdc->base = res->start;
533
534 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
535 dcdc->desc.name = dcdc->name;
536 dcdc->desc.id = id;
537 dcdc->desc.type = REGULATOR_VOLTAGE;
538 dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1;
539 dcdc->desc.ops = &wm831x_buckv_ops;
540 dcdc->desc.owner = THIS_MODULE;
541
e24a04c4
MB		 542 ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG);
543 if (ret < 0) {
544 dev_err(wm831x->dev, "Failed to read ON VSEL: %d\n", ret);
545 goto err;
546 }
547 dcdc->on_vsel = ret & WM831X_DC1_ON_VSEL_MASK;
548
a1b81dd3 549 ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL);
e24a04c4
MB		 550 if (ret < 0) {
551 dev_err(wm831x->dev, "Failed to read DVS VSEL: %d\n", ret);
552 goto err;
553 }
554 dcdc->dvs_vsel = ret & WM831X_DC1_DVS_VSEL_MASK;
555
556 if (pdata->dcdc[id])
557 wm831x_buckv_dvs_init(dcdc, pdata->dcdc[id]->driver_data);
558
e4ee831f 559 dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev,
2c043bcb 560 pdata->dcdc[id], dcdc, NULL);
e4ee831f
MB		 561 if (IS_ERR(dcdc->regulator)) {
562 ret = PTR_ERR(dcdc->regulator);
563 dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
564 id + 1, ret);
565 goto err;
566 }
567
568 irq = platform_get_irq_byname(pdev, "UV");
dfda9c27
MB		 569 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq,
570 IRQF_TRIGGER_RISING, dcdc->name, dcdc);
e4ee831f
MB		 571 if (ret != 0) {
572 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
573 irq, ret);
574 goto err_regulator;
575 }
576
577 irq = platform_get_irq_byname(pdev, "HC");
dfda9c27
MB		 578 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_oc_irq,
579 IRQF_TRIGGER_RISING, dcdc->name, dcdc);
e4ee831f
MB		 580 if (ret != 0) {
581 dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n",
582 irq, ret);
583 goto err_uv;
584 }
585
586 platform_set_drvdata(pdev, dcdc);
587
588 return 0;
589
590err_uv:
dfda9c27 591 free_irq(platform_get_irq_byname(pdev, "UV"), dcdc);
e4ee831f
MB		 592err_regulator:
593 regulator_unregister(dcdc->regulator);
594err:
e24a04c4
MB		 595 if (dcdc->dvs_gpio)
596 gpio_free(dcdc->dvs_gpio);
e4ee831f
MB		 597 return ret;
598}
599
600static __devexit int wm831x_buckv_remove(struct platform_device *pdev)
601{
602 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
e4ee831f 603
eb66d565
DT		 604 platform_set_drvdata(pdev, NULL);
605
69952369
MB		 606 free_irq(platform_get_irq_byname(pdev, "HC"), dcdc);
607 free_irq(platform_get_irq_byname(pdev, "UV"), dcdc);
e4ee831f 608 regulator_unregister(dcdc->regulator);
e24a04c4
MB		 609 if (dcdc->dvs_gpio)
610 gpio_free(dcdc->dvs_gpio);
e4ee831f
MB		 611
612 return 0;
613}
614
615static struct platform_driver wm831x_buckv_driver = {
616 .probe = wm831x_buckv_probe,
617 .remove = __devexit_p(wm831x_buckv_remove),
618 .driver = {
619 .name = "wm831x-buckv",
eb66d565 620 .owner = THIS_MODULE,
e4ee831f
MB		 621 },
622};
623
624/*
625 * BUCKP specifics
626 */
627
628static int wm831x_buckp_list_voltage(struct regulator_dev *rdev,
629 unsigned selector)
630{
631 if (selector <= WM831X_BUCKP_MAX_SELECTOR)
632 return 850000 + (selector * 25000);
633 else
634 return -EINVAL;
635}
636
637static int wm831x_buckp_set_voltage_int(struct regulator_dev *rdev, int reg,
3a93f2a9 638 int min_uV, int max_uV, int *selector)
e4ee831f
MB		 639{
640 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
641 struct wm831x *wm831x = dcdc->wm831x;
642 u16 vsel;
643
644 if (min_uV <= 34000000)
645 vsel = (min_uV - 850000) / 25000;
646 else
647 return -EINVAL;
648
649 if (wm831x_buckp_list_voltage(rdev, vsel) > max_uV)
650 return -EINVAL;
651
3a93f2a9
MB		 652 *selector = vsel;
653
e4ee831f
MB		 654 return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, vsel);
655}
656
657static int wm831x_buckp_set_voltage(struct regulator_dev *rdev,
3a93f2a9
MB		 658 int min_uV, int max_uV,
659 unsigned *selector)
e4ee831f
MB		 660{
661 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
662 u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
663
3a93f2a9
MB		 664 return wm831x_buckp_set_voltage_int(rdev, reg, min_uV, max_uV,
665 selector);
e4ee831f
MB		 666}
667
668static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev,
669 int uV)
670{
671 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
672 u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
3a93f2a9 673 unsigned selector;
e4ee831f 674
3a93f2a9 675 return wm831x_buckp_set_voltage_int(rdev, reg, uV, uV, &selector);
e4ee831f
MB		 676}
677
afb8bb80 678static int wm831x_buckp_get_voltage_sel(struct regulator_dev *rdev)
e4ee831f
MB		 679{
680 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
681 struct wm831x *wm831x = dcdc->wm831x;
682 u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
683 int val;
684
685 val = wm831x_reg_read(wm831x, reg);
686 if (val < 0)
687 return val;
688
afb8bb80 689 return val & WM831X_DC3_ON_VSEL_MASK;
e4ee831f
MB		 690}
691
692static struct regulator_ops wm831x_buckp_ops = {
693 .set_voltage = wm831x_buckp_set_voltage,
afb8bb80 694 .get_voltage_sel = wm831x_buckp_get_voltage_sel,
e4ee831f
MB		 695 .list_voltage = wm831x_buckp_list_voltage,
696 .set_suspend_voltage = wm831x_buckp_set_suspend_voltage,
697
698 .is_enabled = wm831x_dcdc_is_enabled,
699 .enable = wm831x_dcdc_enable,
700 .disable = wm831x_dcdc_disable,
701 .get_status = wm831x_dcdc_get_status,
702 .get_mode = wm831x_dcdc_get_mode,
703 .set_mode = wm831x_dcdc_set_mode,
704 .set_suspend_mode = wm831x_dcdc_set_suspend_mode,
705};
706
707static __devinit int wm831x_buckp_probe(struct platform_device *pdev)
708{
709 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
710 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
137a6354 711 int id;
e4ee831f
MB		 712 struct wm831x_dcdc *dcdc;
713 struct resource *res;
714 int ret, irq;
715
137a6354
MB		 716 if (pdata && pdata->wm831x_num)
717 id = (pdata->wm831x_num * 10) + 1;
718 else
719 id = 0;
720 id = pdev->id - id;
721
e4ee831f
MB		 722 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
723
724 if (pdata == NULL || pdata->dcdc[id] == NULL)
725 return -ENODEV;
726
fded2f4f
MB		 727 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc),
728 GFP_KERNEL);
e4ee831f
MB		 729 if (dcdc == NULL) {
730 dev_err(&pdev->dev, "Unable to allocate private data\n");
731 return -ENOMEM;
732 }
733
734 dcdc->wm831x = wm831x;
735
736 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
737 if (res == NULL) {
738 dev_err(&pdev->dev, "No I/O resource\n");
739 ret = -EINVAL;
740 goto err;
741 }
742 dcdc->base = res->start;
743
744 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
745 dcdc->desc.name = dcdc->name;
746 dcdc->desc.id = id;
747 dcdc->desc.type = REGULATOR_VOLTAGE;
748 dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1;
749 dcdc->desc.ops = &wm831x_buckp_ops;
750 dcdc->desc.owner = THIS_MODULE;
751
752 dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev,
2c043bcb 753 pdata->dcdc[id], dcdc, NULL);
e4ee831f
MB		 754 if (IS_ERR(dcdc->regulator)) {
755 ret = PTR_ERR(dcdc->regulator);
756 dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
757 id + 1, ret);
758 goto err;
759 }
760
761 irq = platform_get_irq_byname(pdev, "UV");
dfda9c27
MB		 762 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq,
763 IRQF_TRIGGER_RISING, dcdc->name, dcdc);
e4ee831f
MB		 764 if (ret != 0) {
765 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
766 irq, ret);
767 goto err_regulator;
768 }
769
770 platform_set_drvdata(pdev, dcdc);
771
772 return 0;
773
774err_regulator:
775 regulator_unregister(dcdc->regulator);
776err:
e4ee831f
MB		 777 return ret;
778}
779
780static __devexit int wm831x_buckp_remove(struct platform_device *pdev)
781{
782 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
e4ee831f 783
eb66d565
DT		 784 platform_set_drvdata(pdev, NULL);
785
69952369 786 free_irq(platform_get_irq_byname(pdev, "UV"), dcdc);
e4ee831f 787 regulator_unregister(dcdc->regulator);
e4ee831f
MB		 788
789 return 0;
790}
791
792static struct platform_driver wm831x_buckp_driver = {
793 .probe = wm831x_buckp_probe,
794 .remove = __devexit_p(wm831x_buckp_remove),
795 .driver = {
796 .name = "wm831x-buckp",
eb66d565 797 .owner = THIS_MODULE,
e4ee831f
MB		 798 },
799};
800
1304850d
MB		 801/*
802 * DCDC boost convertors
803 */
804
805static int wm831x_boostp_get_status(struct regulator_dev *rdev)
806{
807 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
808 struct wm831x *wm831x = dcdc->wm831x;
809 int ret;
810
811 /* First, check for errors */
812 ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS);
813 if (ret < 0)
814 return ret;
815
816 if (ret & (1 << rdev_get_id(rdev))) {
817 dev_dbg(wm831x->dev, "DCDC%d under voltage\n",
818 rdev_get_id(rdev) + 1);
819 return REGULATOR_STATUS_ERROR;
820 }
821
822 /* Is the regulator on? */
823 ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS);
824 if (ret < 0)
825 return ret;
826 if (ret & (1 << rdev_get_id(rdev)))
827 return REGULATOR_STATUS_ON;
828 else
829 return REGULATOR_STATUS_OFF;
830}
831
832static struct regulator_ops wm831x_boostp_ops = {
833 .get_status = wm831x_boostp_get_status,
834
835 .is_enabled = wm831x_dcdc_is_enabled,
836 .enable = wm831x_dcdc_enable,
837 .disable = wm831x_dcdc_disable,
838};
839
840static __devinit int wm831x_boostp_probe(struct platform_device *pdev)
841{
842 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
843 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
844 int id = pdev->id % ARRAY_SIZE(pdata->dcdc);
845 struct wm831x_dcdc *dcdc;
846 struct resource *res;
847 int ret, irq;
848
849 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
850
851 if (pdata == NULL || pdata->dcdc[id] == NULL)
852 return -ENODEV;
853
854 dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL);
855 if (dcdc == NULL) {
856 dev_err(&pdev->dev, "Unable to allocate private data\n");
857 return -ENOMEM;
858 }
859
860 dcdc->wm831x = wm831x;
861
862 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
863 if (res == NULL) {
864 dev_err(&pdev->dev, "No I/O resource\n");
865 ret = -EINVAL;
866 goto err;
867 }
868 dcdc->base = res->start;
869
870 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
871 dcdc->desc.name = dcdc->name;
872 dcdc->desc.id = id;
873 dcdc->desc.type = REGULATOR_VOLTAGE;
874 dcdc->desc.ops = &wm831x_boostp_ops;
875 dcdc->desc.owner = THIS_MODULE;
876
877 dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev,
2c043bcb 878 pdata->dcdc[id], dcdc, NULL);
1304850d
MB		 879 if (IS_ERR(dcdc->regulator)) {
880 ret = PTR_ERR(dcdc->regulator);
881 dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
882 id + 1, ret);
883 goto err;
884 }
885
886 irq = platform_get_irq_byname(pdev, "UV");
dfda9c27
MB		 887 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq,
888 IRQF_TRIGGER_RISING, dcdc->name,
889 dcdc);
1304850d
MB		 890 if (ret != 0) {
891 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
892 irq, ret);
893 goto err_regulator;
894 }
895
896 platform_set_drvdata(pdev, dcdc);
897
898 return 0;
899
900err_regulator:
901 regulator_unregister(dcdc->regulator);
902err:
903 kfree(dcdc);
904 return ret;
905}
906
907static __devexit int wm831x_boostp_remove(struct platform_device *pdev)
908{
909 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
1304850d 910
eb66d565
DT		 911 platform_set_drvdata(pdev, NULL);
912
dfda9c27 913 free_irq(platform_get_irq_byname(pdev, "UV"), dcdc);
1304850d
MB		 914 regulator_unregister(dcdc->regulator);
915 kfree(dcdc);
916
917 return 0;
918}
919
920static struct platform_driver wm831x_boostp_driver = {
921 .probe = wm831x_boostp_probe,
922 .remove = __devexit_p(wm831x_boostp_remove),
923 .driver = {
924 .name = "wm831x-boostp",
eb66d565 925 .owner = THIS_MODULE,
1304850d
MB		 926 },
927};
928
8267a9ba
MB		 929/*
930 * External Power Enable
931 *
932 * These aren't actually DCDCs but look like them in hardware so share
933 * code.
934 */
935
936#define WM831X_EPE_BASE 6
937
938static struct regulator_ops wm831x_epe_ops = {
939 .is_enabled = wm831x_dcdc_is_enabled,
940 .enable = wm831x_dcdc_enable,
941 .disable = wm831x_dcdc_disable,
942 .get_status = wm831x_dcdc_get_status,
943};
944
945static __devinit int wm831x_epe_probe(struct platform_device *pdev)
946{
947 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
948 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
949 int id = pdev->id % ARRAY_SIZE(pdata->epe);
950 struct wm831x_dcdc *dcdc;
951 int ret;
952
953 dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1);
954
955 if (pdata == NULL || pdata->epe[id] == NULL)
956 return -ENODEV;
957
958 dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL);
959 if (dcdc == NULL) {
960 dev_err(&pdev->dev, "Unable to allocate private data\n");
961 return -ENOMEM;
962 }
963
964 dcdc->wm831x = wm831x;
965
966 /* For current parts this is correct; probably need to revisit
967 * in future.
968 */
969 snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1);
970 dcdc->desc.name = dcdc->name;
971 dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */
972 dcdc->desc.ops = &wm831x_epe_ops;
973 dcdc->desc.type = REGULATOR_VOLTAGE;
974 dcdc->desc.owner = THIS_MODULE;
975
976 dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev,
2c043bcb 977 pdata->epe[id], dcdc, NULL);
8267a9ba
MB		 978 if (IS_ERR(dcdc->regulator)) {
979 ret = PTR_ERR(dcdc->regulator);
980 dev_err(wm831x->dev, "Failed to register EPE%d: %d\n",
981 id + 1, ret);
982 goto err;
983 }
984
985 platform_set_drvdata(pdev, dcdc);
986
987 return 0;
988
989err:
990 kfree(dcdc);
991 return ret;
992}
993
994static __devexit int wm831x_epe_remove(struct platform_device *pdev)
995{
996 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
997
eb66d565
DT		 998 platform_set_drvdata(pdev, NULL);
999
8267a9ba
MB		 1000 regulator_unregister(dcdc->regulator);
1001 kfree(dcdc);
1002
1003 return 0;
1004}
1005
1006static struct platform_driver wm831x_epe_driver = {
1007 .probe = wm831x_epe_probe,
1008 .remove = __devexit_p(wm831x_epe_remove),
1009 .driver = {
1010 .name = "wm831x-epe",
eb66d565 1011 .owner = THIS_MODULE,
8267a9ba
MB		 1012 },
1013};
1014
e4ee831f
MB		 1015static int __init wm831x_dcdc_init(void)
1016{
1017 int ret;
1018 ret = platform_driver_register(&wm831x_buckv_driver);
1019 if (ret != 0)
1020 pr_err("Failed to register WM831x BUCKV driver: %d\n", ret);
1021
1022 ret = platform_driver_register(&wm831x_buckp_driver);
1023 if (ret != 0)
1024 pr_err("Failed to register WM831x BUCKP driver: %d\n", ret);
1025
1304850d
MB		 1026 ret = platform_driver_register(&wm831x_boostp_driver);
1027 if (ret != 0)
1028 pr_err("Failed to register WM831x BOOST driver: %d\n", ret);
1029
8267a9ba
MB		 1030 ret = platform_driver_register(&wm831x_epe_driver);
1031 if (ret != 0)
1032 pr_err("Failed to register WM831x EPE driver: %d\n", ret);
1033
e4ee831f
MB		 1034 return 0;
1035}
1036subsys_initcall(wm831x_dcdc_init);
1037
1038static void __exit wm831x_dcdc_exit(void)
1039{
8267a9ba 1040 platform_driver_unregister(&wm831x_epe_driver);
1304850d 1041 platform_driver_unregister(&wm831x_boostp_driver);
e4ee831f
MB		 1042 platform_driver_unregister(&wm831x_buckp_driver);
1043 platform_driver_unregister(&wm831x_buckv_driver);
1044}
1045module_exit(wm831x_dcdc_exit);
1046
1047/* Module information */
1048MODULE_AUTHOR("Mark Brown");
1049MODULE_DESCRIPTION("WM831x DC-DC convertor driver");
1050MODULE_LICENSE("GPL");
1051MODULE_ALIAS("platform:wm831x-buckv");
1052MODULE_ALIAS("platform:wm831x-buckp");
24b43150 1053MODULE_ALIAS("platform:wm831x-epe");
Linux 6.x block layer and io_uring tree(s)