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regulator: 88pm8607: Use regulator_get_voltage_sel_regmap()
[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
e4ee831f
MB		 63static unsigned int wm831x_dcdc_get_mode(struct regulator_dev *rdev)
64
65{
66 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
67 struct wm831x *wm831x = dcdc->wm831x;
68 u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
69 int val;
70
71 val = wm831x_reg_read(wm831x, reg);
72 if (val < 0)
73 return val;
74
75 val = (val & WM831X_DC1_ON_MODE_MASK) >> WM831X_DC1_ON_MODE_SHIFT;
76
77 switch (val) {
78 case WM831X_DCDC_MODE_FAST:
79 return REGULATOR_MODE_FAST;
80 case WM831X_DCDC_MODE_NORMAL:
81 return REGULATOR_MODE_NORMAL;
82 case WM831X_DCDC_MODE_STANDBY:
83 return REGULATOR_MODE_STANDBY;
84 case WM831X_DCDC_MODE_IDLE:
85 return REGULATOR_MODE_IDLE;
86 default:
87 BUG();
9ee291a4 88 return -EINVAL;
e4ee831f
MB		 89 }
90}
91
92static int wm831x_dcdc_set_mode_int(struct wm831x *wm831x, int reg,
93 unsigned int mode)
94{
95 int val;
96
97 switch (mode) {
98 case REGULATOR_MODE_FAST:
99 val = WM831X_DCDC_MODE_FAST;
100 break;
101 case REGULATOR_MODE_NORMAL:
102 val = WM831X_DCDC_MODE_NORMAL;
103 break;
104 case REGULATOR_MODE_STANDBY:
105 val = WM831X_DCDC_MODE_STANDBY;
106 break;
107 case REGULATOR_MODE_IDLE:
108 val = WM831X_DCDC_MODE_IDLE;
109 break;
110 default:
111 return -EINVAL;
112 }
113
114 return wm831x_set_bits(wm831x, reg, WM831X_DC1_ON_MODE_MASK,
115 val << WM831X_DC1_ON_MODE_SHIFT);
116}
117
118static int wm831x_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode)
119{
120 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
121 struct wm831x *wm831x = dcdc->wm831x;
122 u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
123
124 return wm831x_dcdc_set_mode_int(wm831x, reg, mode);
125}
126
127static int wm831x_dcdc_set_suspend_mode(struct regulator_dev *rdev,
128 unsigned int mode)
129{
130 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
131 struct wm831x *wm831x = dcdc->wm831x;
132 u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
133
134 return wm831x_dcdc_set_mode_int(wm831x, reg, mode);
135}
136
137static int wm831x_dcdc_get_status(struct regulator_dev *rdev)
138{
139 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
140 struct wm831x *wm831x = dcdc->wm831x;
141 int ret;
142
143 /* First, check for errors */
144 ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS);
145 if (ret < 0)
146 return ret;
147
148 if (ret & (1 << rdev_get_id(rdev))) {
149 dev_dbg(wm831x->dev, "DCDC%d under voltage\n",
150 rdev_get_id(rdev) + 1);
151 return REGULATOR_STATUS_ERROR;
152 }
153
154 /* DCDC1 and DCDC2 can additionally detect high voltage/current */
155 if (rdev_get_id(rdev) < 2) {
156 if (ret & (WM831X_DC1_OV_STS << rdev_get_id(rdev))) {
157 dev_dbg(wm831x->dev, "DCDC%d over voltage\n",
158 rdev_get_id(rdev) + 1);
159 return REGULATOR_STATUS_ERROR;
160 }
161
162 if (ret & (WM831X_DC1_HC_STS << rdev_get_id(rdev))) {
163 dev_dbg(wm831x->dev, "DCDC%d over current\n",
164 rdev_get_id(rdev) + 1);
165 return REGULATOR_STATUS_ERROR;
166 }
167 }
168
169 /* Is the regulator on? */
170 ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS);
171 if (ret < 0)
172 return ret;
173 if (!(ret & (1 << rdev_get_id(rdev))))
174 return REGULATOR_STATUS_OFF;
175
176 /* TODO: When we handle hardware control modes so we can report the
177 * current mode. */
178 return REGULATOR_STATUS_ON;
179}
180
181static irqreturn_t wm831x_dcdc_uv_irq(int irq, void *data)
182{
183 struct wm831x_dcdc *dcdc = data;
184
185 regulator_notifier_call_chain(dcdc->regulator,
186 REGULATOR_EVENT_UNDER_VOLTAGE,
187 NULL);
188
189 return IRQ_HANDLED;
190}
191
192static irqreturn_t wm831x_dcdc_oc_irq(int irq, void *data)
193{
194 struct wm831x_dcdc *dcdc = data;
195
196 regulator_notifier_call_chain(dcdc->regulator,
197 REGULATOR_EVENT_OVER_CURRENT,
198 NULL);
199
200 return IRQ_HANDLED;
201}
202
203/*
204 * BUCKV specifics
205 */
206
207static int wm831x_buckv_list_voltage(struct regulator_dev *rdev,
208 unsigned selector)
209{
210 if (selector <= 0x8)
211 return 600000;
212 if (selector <= WM831X_BUCKV_MAX_SELECTOR)
213 return 600000 + ((selector - 0x8) * 12500);
214 return -EINVAL;
215}
216
e24a04c4
MB		 217static int wm831x_buckv_select_min_voltage(struct regulator_dev *rdev,
218 int min_uV, int max_uV)
e4ee831f 219{
e4ee831f
MB		 220 u16 vsel;
221
222 if (min_uV < 600000)
223 vsel = 0;
224 else if (min_uV <= 1800000)
225 vsel = ((min_uV - 600000) / 12500) + 8;
226 else
227 return -EINVAL;
228
229 if (wm831x_buckv_list_voltage(rdev, vsel) > max_uV)
230 return -EINVAL;
231
e24a04c4
MB		 232 return vsel;
233}
234
e24a04c4
MB		 235static int wm831x_buckv_set_dvs(struct regulator_dev *rdev, int state)
236{
237 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
238
239 if (state == dcdc->dvs_gpio_state)
240 return 0;
241
242 dcdc->dvs_gpio_state = state;
243 gpio_set_value(dcdc->dvs_gpio, state);
244
245 /* Should wait for DVS state change to be asserted if we have
246 * a GPIO for it, for now assume the device is configured
247 * for the fastest possible transition.
248 */
249
250 return 0;
e4ee831f
MB		 251}
252
253static int wm831x_buckv_set_voltage(struct regulator_dev *rdev,
3a93f2a9 254 int min_uV, int max_uV, unsigned *selector)
e4ee831f
MB		 255{
256 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
e24a04c4
MB		 257 struct wm831x *wm831x = dcdc->wm831x;
258 int on_reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
259 int dvs_reg = dcdc->base + WM831X_DCDC_DVS_CONTROL;
260 int vsel, ret;
261
262 vsel = wm831x_buckv_select_min_voltage(rdev, min_uV, max_uV);
263 if (vsel < 0)
264 return vsel;
265
3a93f2a9
MB		 266 *selector = vsel;
267
e24a04c4
MB		 268 /* If this value is already set then do a GPIO update if we can */
269 if (dcdc->dvs_gpio && dcdc->on_vsel == vsel)
270 return wm831x_buckv_set_dvs(rdev, 0);
271
272 if (dcdc->dvs_gpio && dcdc->dvs_vsel == vsel)
273 return wm831x_buckv_set_dvs(rdev, 1);
274
275 /* Always set the ON status to the minimum voltage */
276 ret = wm831x_set_bits(wm831x, on_reg, WM831X_DC1_ON_VSEL_MASK, vsel);
277 if (ret < 0)
278 return ret;
279 dcdc->on_vsel = vsel;
280
281 if (!dcdc->dvs_gpio)
282 return ret;
283
284 /* Kick the voltage transition now */
285 ret = wm831x_buckv_set_dvs(rdev, 0);
286 if (ret < 0)
287 return ret;
288
88cda60e
MB		 289 /*
290 * If this VSEL is higher than the last one we've seen then
291 * remember it as the DVS VSEL. This is optimised for CPUfreq
292 * usage where we want to get to the highest voltage very
293 * quickly.
294 */
295 if (vsel > dcdc->dvs_vsel) {
296 ret = wm831x_set_bits(wm831x, dvs_reg,
297 WM831X_DC1_DVS_VSEL_MASK,
298 dcdc->dvs_vsel);
299 if (ret == 0)
300 dcdc->dvs_vsel = vsel;
301 else
302 dev_warn(wm831x->dev,
303 "Failed to set DCDC DVS VSEL: %d\n", ret);
e24a04c4
MB		 304 }
305
e24a04c4 306 return 0;
e4ee831f
MB		 307}
308
309static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev,
e24a04c4 310 int uV)
e4ee831f
MB		 311{
312 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
e24a04c4 313 struct wm831x *wm831x = dcdc->wm831x;
e4ee831f 314 u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
e24a04c4
MB		 315 int vsel;
316
317 vsel = wm831x_buckv_select_min_voltage(rdev, uV, uV);
318 if (vsel < 0)
319 return vsel;
e4ee831f 320
e24a04c4 321 return wm831x_set_bits(wm831x, reg, WM831X_DC1_SLP_VSEL_MASK, vsel);
e4ee831f
MB		 322}
323
afb8bb80 324static int wm831x_buckv_get_voltage_sel(struct regulator_dev *rdev)
e4ee831f
MB		 325{
326 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
e4ee831f 327
e24a04c4 328 if (dcdc->dvs_gpio && dcdc->dvs_gpio_state)
afb8bb80 329 return dcdc->dvs_vsel;
e24a04c4 330 else
afb8bb80 331 return dcdc->on_vsel;
e4ee831f
MB		 332}
333
334/* Current limit options */
335static u16 wm831x_dcdc_ilim[] = {
336 125, 250, 375, 500, 625, 750, 875, 1000
337};
338
339static int wm831x_buckv_set_current_limit(struct regulator_dev *rdev,
340 int min_uA, int max_uA)
341{
342 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
343 struct wm831x *wm831x = dcdc->wm831x;
344 u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2;
345 int i;
346
347 for (i = 0; i < ARRAY_SIZE(wm831x_dcdc_ilim); i++) {
a171e782
AL		 348 if ((min_uA <= wm831x_dcdc_ilim[i]) &&
349 (wm831x_dcdc_ilim[i] <= max_uA))
e4ee831f
MB		 350 break;
351 }
352 if (i == ARRAY_SIZE(wm831x_dcdc_ilim))
353 return -EINVAL;
354
09bf14b9
AL		 355 return wm831x_set_bits(wm831x, reg, WM831X_DC1_HC_THR_MASK,
356 i << WM831X_DC1_HC_THR_SHIFT);
e4ee831f
MB		 357}
358
359static int wm831x_buckv_get_current_limit(struct regulator_dev *rdev)
360{
361 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
362 struct wm831x *wm831x = dcdc->wm831x;
363 u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2;
364 int val;
365
366 val = wm831x_reg_read(wm831x, reg);
367 if (val < 0)
368 return val;
369
09bf14b9
AL		 370 val = (val & WM831X_DC1_HC_THR_MASK) >> WM831X_DC1_HC_THR_SHIFT;
371 return wm831x_dcdc_ilim[val];
e4ee831f
MB		 372}
373
374static struct regulator_ops wm831x_buckv_ops = {
375 .set_voltage = wm831x_buckv_set_voltage,
afb8bb80 376 .get_voltage_sel = wm831x_buckv_get_voltage_sel,
e4ee831f
MB		 377 .list_voltage = wm831x_buckv_list_voltage,
378 .set_suspend_voltage = wm831x_buckv_set_suspend_voltage,
379 .set_current_limit = wm831x_buckv_set_current_limit,
380 .get_current_limit = wm831x_buckv_get_current_limit,
381
3d138fcc
MB		 382 .is_enabled = regulator_is_enabled_regmap,
383 .enable = regulator_enable_regmap,
384 .disable = regulator_disable_regmap,
e4ee831f
MB		 385 .get_status = wm831x_dcdc_get_status,
386 .get_mode = wm831x_dcdc_get_mode,
387 .set_mode = wm831x_dcdc_set_mode,
388 .set_suspend_mode = wm831x_dcdc_set_suspend_mode,
389};
390
e24a04c4
MB		 391/*
392 * Set up DVS control. We just log errors since we can still run
393 * (with reduced performance) if we fail.
394 */
395static __devinit void wm831x_buckv_dvs_init(struct wm831x_dcdc *dcdc,
396 struct wm831x_buckv_pdata *pdata)
397{
398 struct wm831x *wm831x = dcdc->wm831x;
399 int ret;
400 u16 ctrl;
401
402 if (!pdata || !pdata->dvs_gpio)
403 return;
404
e24a04c4
MB		 405 ret = gpio_request(pdata->dvs_gpio, "DCDC DVS");
406 if (ret < 0) {
407 dev_err(wm831x->dev, "Failed to get %s DVS GPIO: %d\n",
408 dcdc->name, ret);
409 return;
410 }
411
412 /* gpiolib won't let us read the GPIO status so pick the higher
413 * of the two existing voltages so we take it as platform data.
414 */
415 dcdc->dvs_gpio_state = pdata->dvs_init_state;
416
417 ret = gpio_direction_output(pdata->dvs_gpio, dcdc->dvs_gpio_state);
418 if (ret < 0) {
419 dev_err(wm831x->dev, "Failed to enable %s DVS GPIO: %d\n",
420 dcdc->name, ret);
421 gpio_free(pdata->dvs_gpio);
422 return;
423 }
424
425 dcdc->dvs_gpio = pdata->dvs_gpio;
b47ba9fd
MB		 426
427 switch (pdata->dvs_control_src) {
428 case 1:
429 ctrl = 2 << WM831X_DC1_DVS_SRC_SHIFT;
430 break;
431 case 2:
432 ctrl = 3 << WM831X_DC1_DVS_SRC_SHIFT;
433 break;
434 default:
435 dev_err(wm831x->dev, "Invalid DVS control source %d for %s\n",
436 pdata->dvs_control_src, dcdc->name);
437 return;
438 }
439
c439b8f4
MB		 440 /* If DVS_VSEL is set to the minimum value then raise it to ON_VSEL
441 * to make bootstrapping a bit smoother.
442 */
443 if (!dcdc->dvs_vsel) {
444 ret = wm831x_set_bits(wm831x,
445 dcdc->base + WM831X_DCDC_DVS_CONTROL,
446 WM831X_DC1_DVS_VSEL_MASK, dcdc->on_vsel);
447 if (ret == 0)
448 dcdc->dvs_vsel = dcdc->on_vsel;
449 else
450 dev_warn(wm831x->dev, "Failed to set DVS_VSEL: %d\n",
451 ret);
452 }
453
b47ba9fd
MB		 454 ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL,
455 WM831X_DC1_DVS_SRC_MASK, ctrl);
456 if (ret < 0) {
457 dev_err(wm831x->dev, "Failed to set %s DVS source: %d\n",
458 dcdc->name, ret);
459 }
e24a04c4
MB		 460}
461
e4ee831f
MB		 462static __devinit int wm831x_buckv_probe(struct platform_device *pdev)
463{
464 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
465 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
c172708d 466 struct regulator_config config = { };
137a6354 467 int id;
e4ee831f
MB		 468 struct wm831x_dcdc *dcdc;
469 struct resource *res;
470 int ret, irq;
471
137a6354
MB		 472 if (pdata && pdata->wm831x_num)
473 id = (pdata->wm831x_num * 10) + 1;
474 else
475 id = 0;
476 id = pdev->id - id;
477
e4ee831f
MB		 478 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
479
480 if (pdata == NULL || pdata->dcdc[id] == NULL)
481 return -ENODEV;
482
fded2f4f
MB		 483 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc),
484 GFP_KERNEL);
e4ee831f
MB		 485 if (dcdc == NULL) {
486 dev_err(&pdev->dev, "Unable to allocate private data\n");
487 return -ENOMEM;
488 }
489
490 dcdc->wm831x = wm831x;
491
492 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
493 if (res == NULL) {
494 dev_err(&pdev->dev, "No I/O resource\n");
495 ret = -EINVAL;
496 goto err;
497 }
498 dcdc->base = res->start;
499
500 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
501 dcdc->desc.name = dcdc->name;
502 dcdc->desc.id = id;
503 dcdc->desc.type = REGULATOR_VOLTAGE;
504 dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1;
505 dcdc->desc.ops = &wm831x_buckv_ops;
506 dcdc->desc.owner = THIS_MODULE;
3d138fcc
MB		 507 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
508 dcdc->desc.enable_mask = 1 << id;
e4ee831f 509
e24a04c4
MB		 510 ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG);
511 if (ret < 0) {
512 dev_err(wm831x->dev, "Failed to read ON VSEL: %d\n", ret);
513 goto err;
514 }
515 dcdc->on_vsel = ret & WM831X_DC1_ON_VSEL_MASK;
516
a1b81dd3 517 ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL);
e24a04c4
MB		 518 if (ret < 0) {
519 dev_err(wm831x->dev, "Failed to read DVS VSEL: %d\n", ret);
520 goto err;
521 }
522 dcdc->dvs_vsel = ret & WM831X_DC1_DVS_VSEL_MASK;
523
524 if (pdata->dcdc[id])
525 wm831x_buckv_dvs_init(dcdc, pdata->dcdc[id]->driver_data);
526
c172708d
MB		 527 config.dev = pdev->dev.parent;
528 config.init_data = pdata->dcdc[id];
529 config.driver_data = dcdc;
3d138fcc 530 config.regmap = wm831x->regmap;
c172708d
MB		 531
532 dcdc->regulator = regulator_register(&dcdc->desc, &config);
e4ee831f
MB		 533 if (IS_ERR(dcdc->regulator)) {
534 ret = PTR_ERR(dcdc->regulator);
535 dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
536 id + 1, ret);
537 goto err;
538 }
539
540 irq = platform_get_irq_byname(pdev, "UV");
dfda9c27
MB		 541 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq,
542 IRQF_TRIGGER_RISING, dcdc->name, dcdc);
e4ee831f
MB		 543 if (ret != 0) {
544 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
545 irq, ret);
546 goto err_regulator;
547 }
548
549 irq = platform_get_irq_byname(pdev, "HC");
dfda9c27
MB		 550 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_oc_irq,
551 IRQF_TRIGGER_RISING, dcdc->name, dcdc);
e4ee831f
MB		 552 if (ret != 0) {
553 dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n",
554 irq, ret);
555 goto err_uv;
556 }
557
558 platform_set_drvdata(pdev, dcdc);
559
560 return 0;
561
562err_uv:
dfda9c27 563 free_irq(platform_get_irq_byname(pdev, "UV"), dcdc);
e4ee831f
MB		 564err_regulator:
565 regulator_unregister(dcdc->regulator);
566err:
e24a04c4
MB		 567 if (dcdc->dvs_gpio)
568 gpio_free(dcdc->dvs_gpio);
e4ee831f
MB		 569 return ret;
570}
571
572static __devexit int wm831x_buckv_remove(struct platform_device *pdev)
573{
574 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
e4ee831f 575
eb66d565
DT		 576 platform_set_drvdata(pdev, NULL);
577
69952369
MB		 578 free_irq(platform_get_irq_byname(pdev, "HC"), dcdc);
579 free_irq(platform_get_irq_byname(pdev, "UV"), dcdc);
e4ee831f 580 regulator_unregister(dcdc->regulator);
e24a04c4
MB		 581 if (dcdc->dvs_gpio)
582 gpio_free(dcdc->dvs_gpio);
e4ee831f
MB		 583
584 return 0;
585}
586
587static struct platform_driver wm831x_buckv_driver = {
588 .probe = wm831x_buckv_probe,
589 .remove = __devexit_p(wm831x_buckv_remove),
590 .driver = {
591 .name = "wm831x-buckv",
eb66d565 592 .owner = THIS_MODULE,
e4ee831f
MB		 593 },
594};
595
596/*
597 * BUCKP specifics
598 */
599
600static int wm831x_buckp_list_voltage(struct regulator_dev *rdev,
601 unsigned selector)
602{
603 if (selector <= WM831X_BUCKP_MAX_SELECTOR)
604 return 850000 + (selector * 25000);
605 else
606 return -EINVAL;
607}
608
609static int wm831x_buckp_set_voltage_int(struct regulator_dev *rdev, int reg,
3a93f2a9 610 int min_uV, int max_uV, int *selector)
e4ee831f
MB		 611{
612 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
613 struct wm831x *wm831x = dcdc->wm831x;
614 u16 vsel;
615
616 if (min_uV <= 34000000)
617 vsel = (min_uV - 850000) / 25000;
618 else
619 return -EINVAL;
620
621 if (wm831x_buckp_list_voltage(rdev, vsel) > max_uV)
622 return -EINVAL;
623
3a93f2a9
MB		 624 *selector = vsel;
625
e4ee831f
MB		 626 return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, vsel);
627}
628
629static int wm831x_buckp_set_voltage(struct regulator_dev *rdev,
3a93f2a9
MB		 630 int min_uV, int max_uV,
631 unsigned *selector)
e4ee831f
MB		 632{
633 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
634 u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
635
3a93f2a9
MB		 636 return wm831x_buckp_set_voltage_int(rdev, reg, min_uV, max_uV,
637 selector);
e4ee831f
MB		 638}
639
640static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev,
641 int uV)
642{
643 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
644 u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
3a93f2a9 645 unsigned selector;
e4ee831f 646
3a93f2a9 647 return wm831x_buckp_set_voltage_int(rdev, reg, uV, uV, &selector);
e4ee831f
MB		 648}
649
e4ee831f
MB		 650static struct regulator_ops wm831x_buckp_ops = {
651 .set_voltage = wm831x_buckp_set_voltage,
817436e7 652 .get_voltage_sel = regulator_get_voltage_sel_regmap,
e4ee831f
MB		 653 .list_voltage = wm831x_buckp_list_voltage,
654 .set_suspend_voltage = wm831x_buckp_set_suspend_voltage,
655
3d138fcc
MB		 656 .is_enabled = regulator_is_enabled_regmap,
657 .enable = regulator_enable_regmap,
658 .disable = regulator_disable_regmap,
e4ee831f
MB		 659 .get_status = wm831x_dcdc_get_status,
660 .get_mode = wm831x_dcdc_get_mode,
661 .set_mode = wm831x_dcdc_set_mode,
662 .set_suspend_mode = wm831x_dcdc_set_suspend_mode,
663};
664
665static __devinit int wm831x_buckp_probe(struct platform_device *pdev)
666{
667 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
668 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
c172708d 669 struct regulator_config config = { };
137a6354 670 int id;
e4ee831f
MB		 671 struct wm831x_dcdc *dcdc;
672 struct resource *res;
673 int ret, irq;
674
137a6354
MB		 675 if (pdata && pdata->wm831x_num)
676 id = (pdata->wm831x_num * 10) + 1;
677 else
678 id = 0;
679 id = pdev->id - id;
680
e4ee831f
MB		 681 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
682
683 if (pdata == NULL || pdata->dcdc[id] == NULL)
684 return -ENODEV;
685
fded2f4f
MB		 686 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc),
687 GFP_KERNEL);
e4ee831f
MB		 688 if (dcdc == NULL) {
689 dev_err(&pdev->dev, "Unable to allocate private data\n");
690 return -ENOMEM;
691 }
692
693 dcdc->wm831x = wm831x;
694
695 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
696 if (res == NULL) {
697 dev_err(&pdev->dev, "No I/O resource\n");
698 ret = -EINVAL;
699 goto err;
700 }
701 dcdc->base = res->start;
702
703 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
704 dcdc->desc.name = dcdc->name;
705 dcdc->desc.id = id;
706 dcdc->desc.type = REGULATOR_VOLTAGE;
707 dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1;
708 dcdc->desc.ops = &wm831x_buckp_ops;
709 dcdc->desc.owner = THIS_MODULE;
817436e7
MB		 710 dcdc->desc.vsel_reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
711 dcdc->desc.vsel_mask = WM831X_DC3_ON_VSEL_MASK;
3d138fcc
MB		 712 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
713 dcdc->desc.enable_mask = 1 << id;
e4ee831f 714
c172708d
MB		 715 config.dev = pdev->dev.parent;
716 config.init_data = pdata->dcdc[id];
717 config.driver_data = dcdc;
817436e7 718 config.regmap = wm831x->regmap;
c172708d
MB		 719
720 dcdc->regulator = regulator_register(&dcdc->desc, &config);
e4ee831f
MB		 721 if (IS_ERR(dcdc->regulator)) {
722 ret = PTR_ERR(dcdc->regulator);
723 dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
724 id + 1, ret);
725 goto err;
726 }
727
728 irq = platform_get_irq_byname(pdev, "UV");
dfda9c27
MB		 729 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq,
730 IRQF_TRIGGER_RISING, dcdc->name, dcdc);
e4ee831f
MB		 731 if (ret != 0) {
732 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
733 irq, ret);
734 goto err_regulator;
735 }
736
737 platform_set_drvdata(pdev, dcdc);
738
739 return 0;
740
741err_regulator:
742 regulator_unregister(dcdc->regulator);
743err:
e4ee831f
MB		 744 return ret;
745}
746
747static __devexit int wm831x_buckp_remove(struct platform_device *pdev)
748{
749 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
e4ee831f 750
eb66d565
DT		 751 platform_set_drvdata(pdev, NULL);
752
69952369 753 free_irq(platform_get_irq_byname(pdev, "UV"), dcdc);
e4ee831f 754 regulator_unregister(dcdc->regulator);
e4ee831f
MB		 755
756 return 0;
757}
758
759static struct platform_driver wm831x_buckp_driver = {
760 .probe = wm831x_buckp_probe,
761 .remove = __devexit_p(wm831x_buckp_remove),
762 .driver = {
763 .name = "wm831x-buckp",
eb66d565 764 .owner = THIS_MODULE,
e4ee831f
MB		 765 },
766};
767
1304850d
MB		 768/*
769 * DCDC boost convertors
770 */
771
772static int wm831x_boostp_get_status(struct regulator_dev *rdev)
773{
774 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
775 struct wm831x *wm831x = dcdc->wm831x;
776 int ret;
777
778 /* First, check for errors */
779 ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS);
780 if (ret < 0)
781 return ret;
782
783 if (ret & (1 << rdev_get_id(rdev))) {
784 dev_dbg(wm831x->dev, "DCDC%d under voltage\n",
785 rdev_get_id(rdev) + 1);
786 return REGULATOR_STATUS_ERROR;
787 }
788
789 /* Is the regulator on? */
790 ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS);
791 if (ret < 0)
792 return ret;
793 if (ret & (1 << rdev_get_id(rdev)))
794 return REGULATOR_STATUS_ON;
795 else
796 return REGULATOR_STATUS_OFF;
797}
798
799static struct regulator_ops wm831x_boostp_ops = {
800 .get_status = wm831x_boostp_get_status,
801
3d138fcc
MB		 802 .is_enabled = regulator_is_enabled_regmap,
803 .enable = regulator_enable_regmap,
804 .disable = regulator_disable_regmap,
1304850d
MB		 805};
806
807static __devinit int wm831x_boostp_probe(struct platform_device *pdev)
808{
809 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
810 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
c172708d 811 struct regulator_config config = { };
1304850d
MB		 812 int id = pdev->id % ARRAY_SIZE(pdata->dcdc);
813 struct wm831x_dcdc *dcdc;
814 struct resource *res;
815 int ret, irq;
816
817 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
818
819 if (pdata == NULL || pdata->dcdc[id] == NULL)
820 return -ENODEV;
821
4c60165d 822 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL);
1304850d
MB		 823 if (dcdc == NULL) {
824 dev_err(&pdev->dev, "Unable to allocate private data\n");
825 return -ENOMEM;
826 }
827
828 dcdc->wm831x = wm831x;
829
830 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
831 if (res == NULL) {
832 dev_err(&pdev->dev, "No I/O resource\n");
833 ret = -EINVAL;
834 goto err;
835 }
836 dcdc->base = res->start;
837
838 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
839 dcdc->desc.name = dcdc->name;
840 dcdc->desc.id = id;
841 dcdc->desc.type = REGULATOR_VOLTAGE;
842 dcdc->desc.ops = &wm831x_boostp_ops;
843 dcdc->desc.owner = THIS_MODULE;
3d138fcc
MB		 844 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
845 dcdc->desc.enable_mask = 1 << id;
1304850d 846
c172708d
MB		 847 config.dev = pdev->dev.parent;
848 config.init_data = pdata->dcdc[id];
849 config.driver_data = dcdc;
3d138fcc 850 config.regmap = wm831x->regmap;
c172708d
MB		 851
852 dcdc->regulator = regulator_register(&dcdc->desc, &config);
1304850d
MB		 853 if (IS_ERR(dcdc->regulator)) {
854 ret = PTR_ERR(dcdc->regulator);
855 dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
856 id + 1, ret);
857 goto err;
858 }
859
860 irq = platform_get_irq_byname(pdev, "UV");
dfda9c27
MB		 861 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq,
862 IRQF_TRIGGER_RISING, dcdc->name,
863 dcdc);
1304850d
MB		 864 if (ret != 0) {
865 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
866 irq, ret);
867 goto err_regulator;
868 }
869
870 platform_set_drvdata(pdev, dcdc);
871
872 return 0;
873
874err_regulator:
875 regulator_unregister(dcdc->regulator);
876err:
1304850d
MB		 877 return ret;
878}
879
880static __devexit int wm831x_boostp_remove(struct platform_device *pdev)
881{
882 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
1304850d 883
eb66d565
DT		 884 platform_set_drvdata(pdev, NULL);
885
dfda9c27 886 free_irq(platform_get_irq_byname(pdev, "UV"), dcdc);
1304850d 887 regulator_unregister(dcdc->regulator);
1304850d
MB		 888
889 return 0;
890}
891
892static struct platform_driver wm831x_boostp_driver = {
893 .probe = wm831x_boostp_probe,
894 .remove = __devexit_p(wm831x_boostp_remove),
895 .driver = {
896 .name = "wm831x-boostp",
eb66d565 897 .owner = THIS_MODULE,
1304850d
MB		 898 },
899};
900
8267a9ba
MB		 901/*
902 * External Power Enable
903 *
904 * These aren't actually DCDCs but look like them in hardware so share
905 * code.
906 */
907
908#define WM831X_EPE_BASE 6
909
910static struct regulator_ops wm831x_epe_ops = {
3d138fcc
MB		 911 .is_enabled = regulator_is_enabled_regmap,
912 .enable = regulator_enable_regmap,
913 .disable = regulator_disable_regmap,
8267a9ba
MB		 914 .get_status = wm831x_dcdc_get_status,
915};
916
917static __devinit int wm831x_epe_probe(struct platform_device *pdev)
918{
919 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
920 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
c172708d 921 struct regulator_config config = { };
8267a9ba
MB		 922 int id = pdev->id % ARRAY_SIZE(pdata->epe);
923 struct wm831x_dcdc *dcdc;
924 int ret;
925
926 dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1);
927
928 if (pdata == NULL || pdata->epe[id] == NULL)
929 return -ENODEV;
930
4c60165d 931 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL);
8267a9ba
MB		 932 if (dcdc == NULL) {
933 dev_err(&pdev->dev, "Unable to allocate private data\n");
934 return -ENOMEM;
935 }
936
937 dcdc->wm831x = wm831x;
938
939 /* For current parts this is correct; probably need to revisit
940 * in future.
941 */
942 snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1);
943 dcdc->desc.name = dcdc->name;
944 dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */
945 dcdc->desc.ops = &wm831x_epe_ops;
946 dcdc->desc.type = REGULATOR_VOLTAGE;
947 dcdc->desc.owner = THIS_MODULE;
3d138fcc
MB		 948 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
949 dcdc->desc.enable_mask = 1 << dcdc->desc.id;
8267a9ba 950
c172708d
MB		 951 config.dev = pdev->dev.parent;
952 config.init_data = pdata->epe[id];
953 config.driver_data = dcdc;
3d138fcc 954 config.regmap = wm831x->regmap;
c172708d
MB		 955
956 dcdc->regulator = regulator_register(&dcdc->desc, &config);
8267a9ba
MB		 957 if (IS_ERR(dcdc->regulator)) {
958 ret = PTR_ERR(dcdc->regulator);
959 dev_err(wm831x->dev, "Failed to register EPE%d: %d\n",
960 id + 1, ret);
961 goto err;
962 }
963
964 platform_set_drvdata(pdev, dcdc);
965
966 return 0;
967
968err:
8267a9ba
MB		 969 return ret;
970}
971
972static __devexit int wm831x_epe_remove(struct platform_device *pdev)
973{
974 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
975
eb66d565 976 platform_set_drvdata(pdev, NULL);
8267a9ba 977 regulator_unregister(dcdc->regulator);
8267a9ba
MB		 978
979 return 0;
980}
981
982static struct platform_driver wm831x_epe_driver = {
983 .probe = wm831x_epe_probe,
984 .remove = __devexit_p(wm831x_epe_remove),
985 .driver = {
986 .name = "wm831x-epe",
eb66d565 987 .owner = THIS_MODULE,
8267a9ba
MB		 988 },
989};
990
e4ee831f
MB		 991static int __init wm831x_dcdc_init(void)
992{
993 int ret;
994 ret = platform_driver_register(&wm831x_buckv_driver);
995 if (ret != 0)
996 pr_err("Failed to register WM831x BUCKV driver: %d\n", ret);
997
998 ret = platform_driver_register(&wm831x_buckp_driver);
999 if (ret != 0)
1000 pr_err("Failed to register WM831x BUCKP driver: %d\n", ret);
1001
1304850d
MB		 1002 ret = platform_driver_register(&wm831x_boostp_driver);
1003 if (ret != 0)
1004 pr_err("Failed to register WM831x BOOST driver: %d\n", ret);
1005
8267a9ba
MB		 1006 ret = platform_driver_register(&wm831x_epe_driver);
1007 if (ret != 0)
1008 pr_err("Failed to register WM831x EPE driver: %d\n", ret);
1009
e4ee831f
MB		 1010 return 0;
1011}
1012subsys_initcall(wm831x_dcdc_init);
1013
1014static void __exit wm831x_dcdc_exit(void)
1015{
8267a9ba 1016 platform_driver_unregister(&wm831x_epe_driver);
1304850d 1017 platform_driver_unregister(&wm831x_boostp_driver);
e4ee831f
MB		 1018 platform_driver_unregister(&wm831x_buckp_driver);
1019 platform_driver_unregister(&wm831x_buckv_driver);
1020}
1021module_exit(wm831x_dcdc_exit);
1022
1023/* Module information */
1024MODULE_AUTHOR("Mark Brown");
1025MODULE_DESCRIPTION("WM831x DC-DC convertor driver");
1026MODULE_LICENSE("GPL");
1027MODULE_ALIAS("platform:wm831x-buckv");
1028MODULE_ALIAS("platform:wm831x-buckp");
24b43150 1029MODULE_ALIAS("platform:wm831x-epe");
Linux 6.x block layer and io_uring tree(s)