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[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
82caa978 38#define WM831X_DCDC_MAX_NAME 9
e4ee831f
MB		 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];
82caa978 53 char supply_name[WM831X_DCDC_MAX_NAME];
e4ee831f
MB		 54 struct regulator_desc desc;
55 int base;
56 struct wm831x *wm831x;
57 struct regulator_dev *regulator;
e24a04c4
MB		 58 int dvs_gpio;
59 int dvs_gpio_state;
60 int on_vsel;
61 int dvs_vsel;
e4ee831f
MB		 62};
63
e4ee831f
MB		 64static unsigned int wm831x_dcdc_get_mode(struct regulator_dev *rdev)
65
66{
67 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
68 struct wm831x *wm831x = dcdc->wm831x;
69 u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
70 int val;
71
72 val = wm831x_reg_read(wm831x, reg);
73 if (val < 0)
74 return val;
75
76 val = (val & WM831X_DC1_ON_MODE_MASK) >> WM831X_DC1_ON_MODE_SHIFT;
77
78 switch (val) {
79 case WM831X_DCDC_MODE_FAST:
80 return REGULATOR_MODE_FAST;
81 case WM831X_DCDC_MODE_NORMAL:
82 return REGULATOR_MODE_NORMAL;
83 case WM831X_DCDC_MODE_STANDBY:
84 return REGULATOR_MODE_STANDBY;
85 case WM831X_DCDC_MODE_IDLE:
86 return REGULATOR_MODE_IDLE;
87 default:
88 BUG();
9ee291a4 89 return -EINVAL;
e4ee831f
MB		 90 }
91}
92
93static int wm831x_dcdc_set_mode_int(struct wm831x *wm831x, int reg,
94 unsigned int mode)
95{
96 int val;
97
98 switch (mode) {
99 case REGULATOR_MODE_FAST:
100 val = WM831X_DCDC_MODE_FAST;
101 break;
102 case REGULATOR_MODE_NORMAL:
103 val = WM831X_DCDC_MODE_NORMAL;
104 break;
105 case REGULATOR_MODE_STANDBY:
106 val = WM831X_DCDC_MODE_STANDBY;
107 break;
108 case REGULATOR_MODE_IDLE:
109 val = WM831X_DCDC_MODE_IDLE;
110 break;
111 default:
112 return -EINVAL;
113 }
114
115 return wm831x_set_bits(wm831x, reg, WM831X_DC1_ON_MODE_MASK,
116 val << WM831X_DC1_ON_MODE_SHIFT);
117}
118
119static int wm831x_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode)
120{
121 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
122 struct wm831x *wm831x = dcdc->wm831x;
123 u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
124
125 return wm831x_dcdc_set_mode_int(wm831x, reg, mode);
126}
127
128static int wm831x_dcdc_set_suspend_mode(struct regulator_dev *rdev,
129 unsigned int mode)
130{
131 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
132 struct wm831x *wm831x = dcdc->wm831x;
133 u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
134
135 return wm831x_dcdc_set_mode_int(wm831x, reg, mode);
136}
137
138static int wm831x_dcdc_get_status(struct regulator_dev *rdev)
139{
140 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
141 struct wm831x *wm831x = dcdc->wm831x;
142 int ret;
143
144 /* First, check for errors */
145 ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS);
146 if (ret < 0)
147 return ret;
148
149 if (ret & (1 << rdev_get_id(rdev))) {
150 dev_dbg(wm831x->dev, "DCDC%d under voltage\n",
151 rdev_get_id(rdev) + 1);
152 return REGULATOR_STATUS_ERROR;
153 }
154
155 /* DCDC1 and DCDC2 can additionally detect high voltage/current */
156 if (rdev_get_id(rdev) < 2) {
157 if (ret & (WM831X_DC1_OV_STS << rdev_get_id(rdev))) {
158 dev_dbg(wm831x->dev, "DCDC%d over voltage\n",
159 rdev_get_id(rdev) + 1);
160 return REGULATOR_STATUS_ERROR;
161 }
162
163 if (ret & (WM831X_DC1_HC_STS << rdev_get_id(rdev))) {
164 dev_dbg(wm831x->dev, "DCDC%d over current\n",
165 rdev_get_id(rdev) + 1);
166 return REGULATOR_STATUS_ERROR;
167 }
168 }
169
170 /* Is the regulator on? */
171 ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS);
172 if (ret < 0)
173 return ret;
174 if (!(ret & (1 << rdev_get_id(rdev))))
175 return REGULATOR_STATUS_OFF;
176
177 /* TODO: When we handle hardware control modes so we can report the
178 * current mode. */
179 return REGULATOR_STATUS_ON;
180}
181
182static irqreturn_t wm831x_dcdc_uv_irq(int irq, void *data)
183{
184 struct wm831x_dcdc *dcdc = data;
185
186 regulator_notifier_call_chain(dcdc->regulator,
187 REGULATOR_EVENT_UNDER_VOLTAGE,
188 NULL);
189
190 return IRQ_HANDLED;
191}
192
193static irqreturn_t wm831x_dcdc_oc_irq(int irq, void *data)
194{
195 struct wm831x_dcdc *dcdc = data;
196
197 regulator_notifier_call_chain(dcdc->regulator,
198 REGULATOR_EVENT_OVER_CURRENT,
199 NULL);
200
201 return IRQ_HANDLED;
202}
203
204/*
205 * BUCKV specifics
206 */
207
208static int wm831x_buckv_list_voltage(struct regulator_dev *rdev,
209 unsigned selector)
210{
211 if (selector <= 0x8)
212 return 600000;
213 if (selector <= WM831X_BUCKV_MAX_SELECTOR)
214 return 600000 + ((selector - 0x8) * 12500);
215 return -EINVAL;
216}
217
b5fb77e0
AL		 218static int wm831x_buckv_map_voltage(struct regulator_dev *rdev,
219 int min_uV, int max_uV)
e4ee831f 220{
e4ee831f
MB		 221 u16 vsel;
222
223 if (min_uV < 600000)
224 vsel = 0;
225 else if (min_uV <= 1800000)
1a679930 226 vsel = DIV_ROUND_UP(min_uV - 600000, 12500) + 8;
e4ee831f
MB		 227 else
228 return -EINVAL;
229
230 if (wm831x_buckv_list_voltage(rdev, vsel) > max_uV)
231 return -EINVAL;
232
e24a04c4
MB		 233 return vsel;
234}
235
e24a04c4
MB		 236static int wm831x_buckv_set_dvs(struct regulator_dev *rdev, int state)
237{
238 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
239
240 if (state == dcdc->dvs_gpio_state)
241 return 0;
242
243 dcdc->dvs_gpio_state = state;
244 gpio_set_value(dcdc->dvs_gpio, state);
245
246 /* Should wait for DVS state change to be asserted if we have
247 * a GPIO for it, for now assume the device is configured
248 * for the fastest possible transition.
249 */
250
251 return 0;
e4ee831f
MB		 252}
253
b5fb77e0
AL		 254static int wm831x_buckv_set_voltage_sel(struct regulator_dev *rdev,
255 unsigned vsel)
e4ee831f
MB		 256{
257 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
e24a04c4
MB		 258 struct wm831x *wm831x = dcdc->wm831x;
259 int on_reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
260 int dvs_reg = dcdc->base + WM831X_DCDC_DVS_CONTROL;
b5fb77e0 261 int ret;
3a93f2a9 262
e24a04c4
MB		 263 /* If this value is already set then do a GPIO update if we can */
264 if (dcdc->dvs_gpio && dcdc->on_vsel == vsel)
265 return wm831x_buckv_set_dvs(rdev, 0);
266
267 if (dcdc->dvs_gpio && dcdc->dvs_vsel == vsel)
268 return wm831x_buckv_set_dvs(rdev, 1);
269
270 /* Always set the ON status to the minimum voltage */
271 ret = wm831x_set_bits(wm831x, on_reg, WM831X_DC1_ON_VSEL_MASK, vsel);
272 if (ret < 0)
273 return ret;
274 dcdc->on_vsel = vsel;
275
276 if (!dcdc->dvs_gpio)
277 return ret;
278
279 /* Kick the voltage transition now */
280 ret = wm831x_buckv_set_dvs(rdev, 0);
281 if (ret < 0)
282 return ret;
283
88cda60e
MB		 284 /*
285 * If this VSEL is higher than the last one we've seen then
286 * remember it as the DVS VSEL. This is optimised for CPUfreq
287 * usage where we want to get to the highest voltage very
288 * quickly.
289 */
290 if (vsel > dcdc->dvs_vsel) {
291 ret = wm831x_set_bits(wm831x, dvs_reg,
292 WM831X_DC1_DVS_VSEL_MASK,
13ae633c 293 vsel);
88cda60e
MB		 294 if (ret == 0)
295 dcdc->dvs_vsel = vsel;
296 else
297 dev_warn(wm831x->dev,
298 "Failed to set DCDC DVS VSEL: %d\n", ret);
e24a04c4
MB		 299 }
300
e24a04c4 301 return 0;
e4ee831f
MB		 302}
303
304static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev,
e24a04c4 305 int uV)
e4ee831f
MB		 306{
307 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
e24a04c4 308 struct wm831x *wm831x = dcdc->wm831x;
e4ee831f 309 u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
e24a04c4
MB		 310 int vsel;
311
b5fb77e0 312 vsel = wm831x_buckv_map_voltage(rdev, uV, uV);
e24a04c4
MB		 313 if (vsel < 0)
314 return vsel;
e4ee831f 315
e24a04c4 316 return wm831x_set_bits(wm831x, reg, WM831X_DC1_SLP_VSEL_MASK, vsel);
e4ee831f
MB		 317}
318
afb8bb80 319static int wm831x_buckv_get_voltage_sel(struct regulator_dev *rdev)
e4ee831f
MB		 320{
321 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
e4ee831f 322
e24a04c4 323 if (dcdc->dvs_gpio && dcdc->dvs_gpio_state)
afb8bb80 324 return dcdc->dvs_vsel;
e24a04c4 325 else
afb8bb80 326 return dcdc->on_vsel;
e4ee831f
MB		 327}
328
329/* Current limit options */
330static u16 wm831x_dcdc_ilim[] = {
331 125, 250, 375, 500, 625, 750, 875, 1000
332};
333
334static int wm831x_buckv_set_current_limit(struct regulator_dev *rdev,
335 int min_uA, int max_uA)
336{
337 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
338 struct wm831x *wm831x = dcdc->wm831x;
339 u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2;
340 int i;
341
422294de 342 for (i = ARRAY_SIZE(wm831x_dcdc_ilim) - 1; i >= 0; i--) {
a171e782
AL		 343 if ((min_uA <= wm831x_dcdc_ilim[i]) &&
344 (wm831x_dcdc_ilim[i] <= max_uA))
422294de
AL		 345 return wm831x_set_bits(wm831x, reg,
346 WM831X_DC1_HC_THR_MASK,
347 i << WM831X_DC1_HC_THR_SHIFT);
e4ee831f 348 }
e4ee831f 349
422294de 350 return -EINVAL;
e4ee831f
MB		 351}
352
353static int wm831x_buckv_get_current_limit(struct regulator_dev *rdev)
354{
355 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
356 struct wm831x *wm831x = dcdc->wm831x;
357 u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2;
358 int val;
359
360 val = wm831x_reg_read(wm831x, reg);
361 if (val < 0)
362 return val;
363
09bf14b9
AL		 364 val = (val & WM831X_DC1_HC_THR_MASK) >> WM831X_DC1_HC_THR_SHIFT;
365 return wm831x_dcdc_ilim[val];
e4ee831f
MB		 366}
367
368static struct regulator_ops wm831x_buckv_ops = {
b5fb77e0 369 .set_voltage_sel = wm831x_buckv_set_voltage_sel,
afb8bb80 370 .get_voltage_sel = wm831x_buckv_get_voltage_sel,
e4ee831f 371 .list_voltage = wm831x_buckv_list_voltage,
b5fb77e0 372 .map_voltage = wm831x_buckv_map_voltage,
e4ee831f
MB		 373 .set_suspend_voltage = wm831x_buckv_set_suspend_voltage,
374 .set_current_limit = wm831x_buckv_set_current_limit,
375 .get_current_limit = wm831x_buckv_get_current_limit,
376
3d138fcc
MB		 377 .is_enabled = regulator_is_enabled_regmap,
378 .enable = regulator_enable_regmap,
379 .disable = regulator_disable_regmap,
e4ee831f
MB		 380 .get_status = wm831x_dcdc_get_status,
381 .get_mode = wm831x_dcdc_get_mode,
382 .set_mode = wm831x_dcdc_set_mode,
383 .set_suspend_mode = wm831x_dcdc_set_suspend_mode,
384};
385
e24a04c4
MB		 386/*
387 * Set up DVS control. We just log errors since we can still run
388 * (with reduced performance) if we fail.
389 */
a5023574 390static void wm831x_buckv_dvs_init(struct wm831x_dcdc *dcdc,
e24a04c4
MB		 391 struct wm831x_buckv_pdata *pdata)
392{
393 struct wm831x *wm831x = dcdc->wm831x;
394 int ret;
395 u16 ctrl;
396
397 if (!pdata || !pdata->dvs_gpio)
398 return;
399
e24a04c4
MB		 400 /* gpiolib won't let us read the GPIO status so pick the higher
401 * of the two existing voltages so we take it as platform data.
402 */
403 dcdc->dvs_gpio_state = pdata->dvs_init_state;
404
053fa1b7
MB		 405 ret = gpio_request_one(pdata->dvs_gpio,
406 dcdc->dvs_gpio_state ? GPIOF_INIT_HIGH : 0,
407 "DCDC DVS");
e24a04c4 408 if (ret < 0) {
053fa1b7 409 dev_err(wm831x->dev, "Failed to get %s DVS GPIO: %d\n",
e24a04c4 410 dcdc->name, ret);
e24a04c4
MB		 411 return;
412 }
413
414 dcdc->dvs_gpio = pdata->dvs_gpio;
b47ba9fd
MB		 415
416 switch (pdata->dvs_control_src) {
417 case 1:
418 ctrl = 2 << WM831X_DC1_DVS_SRC_SHIFT;
419 break;
420 case 2:
421 ctrl = 3 << WM831X_DC1_DVS_SRC_SHIFT;
422 break;
423 default:
424 dev_err(wm831x->dev, "Invalid DVS control source %d for %s\n",
425 pdata->dvs_control_src, dcdc->name);
426 return;
427 }
428
c439b8f4
MB		 429 /* If DVS_VSEL is set to the minimum value then raise it to ON_VSEL
430 * to make bootstrapping a bit smoother.
431 */
432 if (!dcdc->dvs_vsel) {
433 ret = wm831x_set_bits(wm831x,
434 dcdc->base + WM831X_DCDC_DVS_CONTROL,
435 WM831X_DC1_DVS_VSEL_MASK, dcdc->on_vsel);
436 if (ret == 0)
437 dcdc->dvs_vsel = dcdc->on_vsel;
438 else
439 dev_warn(wm831x->dev, "Failed to set DVS_VSEL: %d\n",
440 ret);
441 }
442
b47ba9fd
MB		 443 ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL,
444 WM831X_DC1_DVS_SRC_MASK, ctrl);
445 if (ret < 0) {
446 dev_err(wm831x->dev, "Failed to set %s DVS source: %d\n",
447 dcdc->name, ret);
448 }
e24a04c4
MB		 449}
450
a5023574 451static int wm831x_buckv_probe(struct platform_device *pdev)
e4ee831f
MB		 452{
453 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
dff91d0b 454 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
c172708d 455 struct regulator_config config = { };
137a6354 456 int id;
e4ee831f
MB		 457 struct wm831x_dcdc *dcdc;
458 struct resource *res;
459 int ret, irq;
460
137a6354
MB		 461 if (pdata && pdata->wm831x_num)
462 id = (pdata->wm831x_num * 10) + 1;
463 else
464 id = 0;
465 id = pdev->id - id;
466
e4ee831f
MB		 467 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
468
fded2f4f
MB		 469 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc),
470 GFP_KERNEL);
e4ee831f
MB		 471 if (dcdc == NULL) {
472 dev_err(&pdev->dev, "Unable to allocate private data\n");
473 return -ENOMEM;
474 }
475
476 dcdc->wm831x = wm831x;
477
5656098e 478 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
e4ee831f 479 if (res == NULL) {
5656098e 480 dev_err(&pdev->dev, "No REG resource\n");
e4ee831f
MB		 481 ret = -EINVAL;
482 goto err;
483 }
484 dcdc->base = res->start;
485
486 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
487 dcdc->desc.name = dcdc->name;
82caa978
MB		 488
489 snprintf(dcdc->supply_name, sizeof(dcdc->supply_name),
490 "DC%dVDD", id + 1);
491 dcdc->desc.supply_name = dcdc->supply_name;
492
e4ee831f
MB		 493 dcdc->desc.id = id;
494 dcdc->desc.type = REGULATOR_VOLTAGE;
495 dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1;
496 dcdc->desc.ops = &wm831x_buckv_ops;
497 dcdc->desc.owner = THIS_MODULE;
3d138fcc
MB		 498 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
499 dcdc->desc.enable_mask = 1 << id;
e4ee831f 500
e24a04c4
MB		 501 ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG);
502 if (ret < 0) {
503 dev_err(wm831x->dev, "Failed to read ON VSEL: %d\n", ret);
504 goto err;
505 }
506 dcdc->on_vsel = ret & WM831X_DC1_ON_VSEL_MASK;
507
a1b81dd3 508 ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL);
e24a04c4
MB		 509 if (ret < 0) {
510 dev_err(wm831x->dev, "Failed to read DVS VSEL: %d\n", ret);
511 goto err;
512 }
513 dcdc->dvs_vsel = ret & WM831X_DC1_DVS_VSEL_MASK;
514
f0b067d9 515 if (pdata && pdata->dcdc[id])
e24a04c4
MB		 516 wm831x_buckv_dvs_init(dcdc, pdata->dcdc[id]->driver_data);
517
c172708d 518 config.dev = pdev->dev.parent;
b7ca8788
MB		 519 if (pdata)
520 config.init_data = pdata->dcdc[id];
c172708d 521 config.driver_data = dcdc;
3d138fcc 522 config.regmap = wm831x->regmap;
c172708d
MB		 523
524 dcdc->regulator = regulator_register(&dcdc->desc, &config);
e4ee831f
MB		 525 if (IS_ERR(dcdc->regulator)) {
526 ret = PTR_ERR(dcdc->regulator);
527 dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
528 id + 1, ret);
529 goto err;
530 }
531
cd99758b 532 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
dfda9c27
MB		 533 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq,
534 IRQF_TRIGGER_RISING, dcdc->name, dcdc);
e4ee831f
MB		 535 if (ret != 0) {
536 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
537 irq, ret);
538 goto err_regulator;
539 }
540
cd99758b 541 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "HC"));
dfda9c27
MB		 542 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_oc_irq,
543 IRQF_TRIGGER_RISING, dcdc->name, dcdc);
e4ee831f
MB		 544 if (ret != 0) {
545 dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n",
546 irq, ret);
547 goto err_uv;
548 }
549
550 platform_set_drvdata(pdev, dcdc);
551
552 return 0;
553
554err_uv:
cd99758b
MB		 555 free_irq(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")),
556 dcdc);
e4ee831f
MB		 557err_regulator:
558 regulator_unregister(dcdc->regulator);
559err:
e24a04c4
MB		 560 if (dcdc->dvs_gpio)
561 gpio_free(dcdc->dvs_gpio);
e4ee831f
MB		 562 return ret;
563}
564
8dc995f5 565static int wm831x_buckv_remove(struct platform_device *pdev)
e4ee831f
MB		 566{
567 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
cd99758b 568 struct wm831x *wm831x = dcdc->wm831x;
e4ee831f 569
cd99758b
MB		 570 free_irq(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "HC")),
571 dcdc);
572 free_irq(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")),
573 dcdc);
e4ee831f 574 regulator_unregister(dcdc->regulator);
e24a04c4
MB		 575 if (dcdc->dvs_gpio)
576 gpio_free(dcdc->dvs_gpio);
e4ee831f
MB		 577
578 return 0;
579}
580
581static struct platform_driver wm831x_buckv_driver = {
582 .probe = wm831x_buckv_probe,
5eb9f2b9 583 .remove = wm831x_buckv_remove,
e4ee831f
MB		 584 .driver = {
585 .name = "wm831x-buckv",
eb66d565 586 .owner = THIS_MODULE,
e4ee831f
MB		 587 },
588};
589
590/*
591 * BUCKP specifics
592 */
593
d580cb5e 594static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev, int uV)
e4ee831f
MB		 595{
596 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
597 struct wm831x *wm831x = dcdc->wm831x;
e4ee831f 598 u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
d580cb5e
AL		 599 int sel;
600
601 sel = regulator_map_voltage_linear(rdev, uV, uV);
602 if (sel < 0)
603 return sel;
e4ee831f 604
d580cb5e 605 return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, sel);
e4ee831f
MB		 606}
607
e4ee831f 608static struct regulator_ops wm831x_buckp_ops = {
d580cb5e 609 .set_voltage_sel = regulator_set_voltage_sel_regmap,
817436e7 610 .get_voltage_sel = regulator_get_voltage_sel_regmap,
c70ad9dc 611 .list_voltage = regulator_list_voltage_linear,
d580cb5e 612 .map_voltage = regulator_map_voltage_linear,
e4ee831f
MB		 613 .set_suspend_voltage = wm831x_buckp_set_suspend_voltage,
614
3d138fcc
MB		 615 .is_enabled = regulator_is_enabled_regmap,
616 .enable = regulator_enable_regmap,
617 .disable = regulator_disable_regmap,
e4ee831f
MB		 618 .get_status = wm831x_dcdc_get_status,
619 .get_mode = wm831x_dcdc_get_mode,
620 .set_mode = wm831x_dcdc_set_mode,
621 .set_suspend_mode = wm831x_dcdc_set_suspend_mode,
622};
623
a5023574 624static int wm831x_buckp_probe(struct platform_device *pdev)
e4ee831f
MB		 625{
626 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
dff91d0b 627 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
c172708d 628 struct regulator_config config = { };
137a6354 629 int id;
e4ee831f
MB		 630 struct wm831x_dcdc *dcdc;
631 struct resource *res;
632 int ret, irq;
633
137a6354
MB		 634 if (pdata && pdata->wm831x_num)
635 id = (pdata->wm831x_num * 10) + 1;
636 else
637 id = 0;
638 id = pdev->id - id;
639
e4ee831f
MB		 640 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
641
fded2f4f
MB		 642 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc),
643 GFP_KERNEL);
e4ee831f
MB		 644 if (dcdc == NULL) {
645 dev_err(&pdev->dev, "Unable to allocate private data\n");
646 return -ENOMEM;
647 }
648
649 dcdc->wm831x = wm831x;
650
5656098e 651 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
e4ee831f 652 if (res == NULL) {
5656098e 653 dev_err(&pdev->dev, "No REG resource\n");
e4ee831f
MB		 654 ret = -EINVAL;
655 goto err;
656 }
657 dcdc->base = res->start;
658
659 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
660 dcdc->desc.name = dcdc->name;
82caa978
MB		 661
662 snprintf(dcdc->supply_name, sizeof(dcdc->supply_name),
663 "DC%dVDD", id + 1);
664 dcdc->desc.supply_name = dcdc->supply_name;
665
e4ee831f
MB		 666 dcdc->desc.id = id;
667 dcdc->desc.type = REGULATOR_VOLTAGE;
668 dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1;
669 dcdc->desc.ops = &wm831x_buckp_ops;
670 dcdc->desc.owner = THIS_MODULE;
817436e7
MB		 671 dcdc->desc.vsel_reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
672 dcdc->desc.vsel_mask = WM831X_DC3_ON_VSEL_MASK;
3d138fcc
MB		 673 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
674 dcdc->desc.enable_mask = 1 << id;
c70ad9dc
AL		 675 dcdc->desc.min_uV = 850000;
676 dcdc->desc.uV_step = 25000;
e4ee831f 677
c172708d 678 config.dev = pdev->dev.parent;
b7ca8788
MB		 679 if (pdata)
680 config.init_data = pdata->dcdc[id];
c172708d 681 config.driver_data = dcdc;
817436e7 682 config.regmap = wm831x->regmap;
c172708d
MB		 683
684 dcdc->regulator = regulator_register(&dcdc->desc, &config);
e4ee831f
MB		 685 if (IS_ERR(dcdc->regulator)) {
686 ret = PTR_ERR(dcdc->regulator);
687 dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
688 id + 1, ret);
689 goto err;
690 }
691
cd99758b 692 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
dfda9c27
MB		 693 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq,
694 IRQF_TRIGGER_RISING, dcdc->name, dcdc);
e4ee831f
MB		 695 if (ret != 0) {
696 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
697 irq, ret);
698 goto err_regulator;
699 }
700
701 platform_set_drvdata(pdev, dcdc);
702
703 return 0;
704
705err_regulator:
706 regulator_unregister(dcdc->regulator);
707err:
e4ee831f
MB		 708 return ret;
709}
710
8dc995f5 711static int wm831x_buckp_remove(struct platform_device *pdev)
e4ee831f
MB		 712{
713 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
e4ee831f 714
cd99758b
MB		 715 free_irq(wm831x_irq(dcdc->wm831x, platform_get_irq_byname(pdev, "UV")),
716 dcdc);
e4ee831f 717 regulator_unregister(dcdc->regulator);
e4ee831f
MB		 718
719 return 0;
720}
721
722static struct platform_driver wm831x_buckp_driver = {
723 .probe = wm831x_buckp_probe,
5eb9f2b9 724 .remove = wm831x_buckp_remove,
e4ee831f
MB		 725 .driver = {
726 .name = "wm831x-buckp",
eb66d565 727 .owner = THIS_MODULE,
e4ee831f
MB		 728 },
729};
730
1304850d
MB		 731/*
732 * DCDC boost convertors
733 */
734
735static int wm831x_boostp_get_status(struct regulator_dev *rdev)
736{
737 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
738 struct wm831x *wm831x = dcdc->wm831x;
739 int ret;
740
741 /* First, check for errors */
742 ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS);
743 if (ret < 0)
744 return ret;
745
746 if (ret & (1 << rdev_get_id(rdev))) {
747 dev_dbg(wm831x->dev, "DCDC%d under voltage\n",
748 rdev_get_id(rdev) + 1);
749 return REGULATOR_STATUS_ERROR;
750 }
751
752 /* Is the regulator on? */
753 ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS);
754 if (ret < 0)
755 return ret;
756 if (ret & (1 << rdev_get_id(rdev)))
757 return REGULATOR_STATUS_ON;
758 else
759 return REGULATOR_STATUS_OFF;
760}
761
762static struct regulator_ops wm831x_boostp_ops = {
763 .get_status = wm831x_boostp_get_status,
764
3d138fcc
MB		 765 .is_enabled = regulator_is_enabled_regmap,
766 .enable = regulator_enable_regmap,
767 .disable = regulator_disable_regmap,
1304850d
MB		 768};
769
a5023574 770static int wm831x_boostp_probe(struct platform_device *pdev)
1304850d
MB		 771{
772 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
dff91d0b 773 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
c172708d 774 struct regulator_config config = { };
1304850d
MB		 775 int id = pdev->id % ARRAY_SIZE(pdata->dcdc);
776 struct wm831x_dcdc *dcdc;
777 struct resource *res;
778 int ret, irq;
779
780 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
781
782 if (pdata == NULL || pdata->dcdc[id] == NULL)
783 return -ENODEV;
784
4c60165d 785 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL);
1304850d
MB		 786 if (dcdc == NULL) {
787 dev_err(&pdev->dev, "Unable to allocate private data\n");
788 return -ENOMEM;
789 }
790
791 dcdc->wm831x = wm831x;
792
5656098e 793 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
1304850d 794 if (res == NULL) {
5656098e 795 dev_err(&pdev->dev, "No REG resource\n");
1304850d
MB		 796 ret = -EINVAL;
797 goto err;
798 }
799 dcdc->base = res->start;
800
801 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
802 dcdc->desc.name = dcdc->name;
803 dcdc->desc.id = id;
804 dcdc->desc.type = REGULATOR_VOLTAGE;
805 dcdc->desc.ops = &wm831x_boostp_ops;
806 dcdc->desc.owner = THIS_MODULE;
3d138fcc
MB		 807 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
808 dcdc->desc.enable_mask = 1 << id;
1304850d 809
c172708d 810 config.dev = pdev->dev.parent;
f0b067d9
MB		 811 if (pdata)
812 config.init_data = pdata->dcdc[id];
c172708d 813 config.driver_data = dcdc;
3d138fcc 814 config.regmap = wm831x->regmap;
c172708d
MB		 815
816 dcdc->regulator = regulator_register(&dcdc->desc, &config);
1304850d
MB		 817 if (IS_ERR(dcdc->regulator)) {
818 ret = PTR_ERR(dcdc->regulator);
819 dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
820 id + 1, ret);
821 goto err;
822 }
823
cd99758b 824 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
dfda9c27
MB		 825 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq,
826 IRQF_TRIGGER_RISING, dcdc->name,
827 dcdc);
1304850d
MB		 828 if (ret != 0) {
829 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
830 irq, ret);
831 goto err_regulator;
832 }
833
834 platform_set_drvdata(pdev, dcdc);
835
836 return 0;
837
838err_regulator:
839 regulator_unregister(dcdc->regulator);
840err:
1304850d
MB		 841 return ret;
842}
843
8dc995f5 844static int wm831x_boostp_remove(struct platform_device *pdev)
1304850d
MB		 845{
846 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
1304850d 847
cd99758b
MB		 848 free_irq(wm831x_irq(dcdc->wm831x, platform_get_irq_byname(pdev, "UV")),
849 dcdc);
1304850d 850 regulator_unregister(dcdc->regulator);
1304850d
MB		 851
852 return 0;
853}
854
855static struct platform_driver wm831x_boostp_driver = {
856 .probe = wm831x_boostp_probe,
5eb9f2b9 857 .remove = wm831x_boostp_remove,
1304850d
MB		 858 .driver = {
859 .name = "wm831x-boostp",
eb66d565 860 .owner = THIS_MODULE,
1304850d
MB		 861 },
862};
863
8267a9ba
MB		 864/*
865 * External Power Enable
866 *
867 * These aren't actually DCDCs but look like them in hardware so share
868 * code.
869 */
870
871#define WM831X_EPE_BASE 6
872
873static struct regulator_ops wm831x_epe_ops = {
3d138fcc
MB		 874 .is_enabled = regulator_is_enabled_regmap,
875 .enable = regulator_enable_regmap,
876 .disable = regulator_disable_regmap,
8267a9ba
MB		 877 .get_status = wm831x_dcdc_get_status,
878};
879
a5023574 880static int wm831x_epe_probe(struct platform_device *pdev)
8267a9ba
MB		 881{
882 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
dff91d0b 883 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
c172708d 884 struct regulator_config config = { };
8267a9ba
MB		 885 int id = pdev->id % ARRAY_SIZE(pdata->epe);
886 struct wm831x_dcdc *dcdc;
887 int ret;
888
889 dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1);
890
4c60165d 891 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL);
8267a9ba
MB		 892 if (dcdc == NULL) {
893 dev_err(&pdev->dev, "Unable to allocate private data\n");
894 return -ENOMEM;
895 }
896
897 dcdc->wm831x = wm831x;
898
899 /* For current parts this is correct; probably need to revisit
900 * in future.
901 */
902 snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1);
903 dcdc->desc.name = dcdc->name;
904 dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */
905 dcdc->desc.ops = &wm831x_epe_ops;
906 dcdc->desc.type = REGULATOR_VOLTAGE;
907 dcdc->desc.owner = THIS_MODULE;
3d138fcc
MB		 908 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
909 dcdc->desc.enable_mask = 1 << dcdc->desc.id;
8267a9ba 910
c172708d 911 config.dev = pdev->dev.parent;
b7ca8788
MB		 912 if (pdata)
913 config.init_data = pdata->epe[id];
c172708d 914 config.driver_data = dcdc;
3d138fcc 915 config.regmap = wm831x->regmap;
c172708d
MB		 916
917 dcdc->regulator = regulator_register(&dcdc->desc, &config);
8267a9ba
MB		 918 if (IS_ERR(dcdc->regulator)) {
919 ret = PTR_ERR(dcdc->regulator);
920 dev_err(wm831x->dev, "Failed to register EPE%d: %d\n",
921 id + 1, ret);
922 goto err;
923 }
924
925 platform_set_drvdata(pdev, dcdc);
926
927 return 0;
928
929err:
8267a9ba
MB		 930 return ret;
931}
932
8dc995f5 933static int wm831x_epe_remove(struct platform_device *pdev)
8267a9ba
MB		 934{
935 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
936
937 regulator_unregister(dcdc->regulator);
8267a9ba
MB		 938
939 return 0;
940}
941
942static struct platform_driver wm831x_epe_driver = {
943 .probe = wm831x_epe_probe,
5eb9f2b9 944 .remove = wm831x_epe_remove,
8267a9ba
MB		 945 .driver = {
946 .name = "wm831x-epe",
eb66d565 947 .owner = THIS_MODULE,
8267a9ba
MB		 948 },
949};
950
e4ee831f
MB		 951static int __init wm831x_dcdc_init(void)
952{
953 int ret;
954 ret = platform_driver_register(&wm831x_buckv_driver);
955 if (ret != 0)
956 pr_err("Failed to register WM831x BUCKV driver: %d\n", ret);
957
958 ret = platform_driver_register(&wm831x_buckp_driver);
959 if (ret != 0)
960 pr_err("Failed to register WM831x BUCKP driver: %d\n", ret);
961
1304850d
MB		 962 ret = platform_driver_register(&wm831x_boostp_driver);
963 if (ret != 0)
964 pr_err("Failed to register WM831x BOOST driver: %d\n", ret);
965
8267a9ba
MB		 966 ret = platform_driver_register(&wm831x_epe_driver);
967 if (ret != 0)
968 pr_err("Failed to register WM831x EPE driver: %d\n", ret);
969
e4ee831f
MB		 970 return 0;
971}
972subsys_initcall(wm831x_dcdc_init);
973
974static void __exit wm831x_dcdc_exit(void)
975{
8267a9ba 976 platform_driver_unregister(&wm831x_epe_driver);
1304850d 977 platform_driver_unregister(&wm831x_boostp_driver);
e4ee831f
MB		 978 platform_driver_unregister(&wm831x_buckp_driver);
979 platform_driver_unregister(&wm831x_buckv_driver);
980}
981module_exit(wm831x_dcdc_exit);
982
983/* Module information */
984MODULE_AUTHOR("Mark Brown");
985MODULE_DESCRIPTION("WM831x DC-DC convertor driver");
986MODULE_LICENSE("GPL");
987MODULE_ALIAS("platform:wm831x-buckv");
988MODULE_ALIAS("platform:wm831x-buckp");
43f1f216 989MODULE_ALIAS("platform:wm831x-boostp");
24b43150 990MODULE_ALIAS("platform:wm831x-epe");
Linux 6.x block layer and io_uring tree(s)