blob: aa47280efd323a62f1f5b416c82e9a2d8edfa22e [file] [log] [blame]
James Ban1028a372014-07-14 13:48:45 +09001/*
James Ban7524c1c2016-06-29 16:49:32 +09002 * da9211-regulator.c - Regulator device driver for DA9211/DA9212
3 * /DA9213/DA9214/DA9215
James Ban7bd39352015-06-30 13:39:39 +09004 * Copyright (C) 2015 Dialog Semiconductor Ltd.
James Ban1028a372014-07-14 13:48:45 +09005 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 */
16
17#include <linux/err.h>
18#include <linux/gpio.h>
19#include <linux/i2c.h>
20#include <linux/module.h>
21#include <linux/init.h>
22#include <linux/slab.h>
23#include <linux/regulator/driver.h>
24#include <linux/regulator/machine.h>
25#include <linux/regmap.h>
26#include <linux/irq.h>
27#include <linux/interrupt.h>
James Ban8c7dd8b2015-01-28 09:28:08 +090028#include <linux/of_gpio.h>
James Banbf3baca2014-08-27 11:47:07 +090029#include <linux/regulator/of_regulator.h>
James Ban1028a372014-07-14 13:48:45 +090030#include <linux/regulator/da9211.h>
31#include "da9211-regulator.h"
32
James Ban005547e2014-08-08 14:27:04 +090033/* DEVICE IDs */
34#define DA9211_DEVICE_ID 0x22
35#define DA9213_DEVICE_ID 0x23
James Ban7bd39352015-06-30 13:39:39 +090036#define DA9215_DEVICE_ID 0x24
James Ban005547e2014-08-08 14:27:04 +090037
James Ban1028a372014-07-14 13:48:45 +090038#define DA9211_BUCK_MODE_SLEEP 1
39#define DA9211_BUCK_MODE_SYNC 2
40#define DA9211_BUCK_MODE_AUTO 3
41
42/* DA9211 REGULATOR IDs */
43#define DA9211_ID_BUCKA 0
44#define DA9211_ID_BUCKB 1
45
46struct da9211 {
47 struct device *dev;
48 struct regmap *regmap;
49 struct da9211_pdata *pdata;
50 struct regulator_dev *rdev[DA9211_MAX_REGULATORS];
51 int num_regulator;
52 int chip_irq;
James Ban005547e2014-08-08 14:27:04 +090053 int chip_id;
James Ban1028a372014-07-14 13:48:45 +090054};
55
56static const struct regmap_range_cfg da9211_regmap_range[] = {
57 {
58 .selector_reg = DA9211_REG_PAGE_CON,
59 .selector_mask = DA9211_REG_PAGE_MASK,
60 .selector_shift = DA9211_REG_PAGE_SHIFT,
61 .window_start = 0,
62 .window_len = 256,
63 .range_min = 0,
James Ban005547e2014-08-08 14:27:04 +090064 .range_max = 5*128,
James Ban1028a372014-07-14 13:48:45 +090065 },
66};
67
68static const struct regmap_config da9211_regmap_config = {
69 .reg_bits = 8,
70 .val_bits = 8,
James Ban005547e2014-08-08 14:27:04 +090071 .max_register = 5 * 128,
James Ban1028a372014-07-14 13:48:45 +090072 .ranges = da9211_regmap_range,
73 .num_ranges = ARRAY_SIZE(da9211_regmap_range),
74};
75
76/* Default limits measured in millivolts and milliamps */
77#define DA9211_MIN_MV 300
78#define DA9211_MAX_MV 1570
79#define DA9211_STEP_MV 10
80
James Ban005547e2014-08-08 14:27:04 +090081/* Current limits for DA9211 buck (uA) indices
82 * corresponds with register values
83 */
James Ban1028a372014-07-14 13:48:45 +090084static const int da9211_current_limits[] = {
85 2000000, 2200000, 2400000, 2600000, 2800000, 3000000, 3200000, 3400000,
86 3600000, 3800000, 4000000, 4200000, 4400000, 4600000, 4800000, 5000000
87};
James Ban005547e2014-08-08 14:27:04 +090088/* Current limits for DA9213 buck (uA) indices
89 * corresponds with register values
90 */
91static const int da9213_current_limits[] = {
92 3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
93 4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
94};
James Ban7bd39352015-06-30 13:39:39 +090095/* Current limits for DA9215 buck (uA) indices
96 * corresponds with register values
97 */
98static const int da9215_current_limits[] = {
99 4000000, 4200000, 4400000, 4600000, 4800000, 5000000, 5200000, 5400000,
100 5600000, 5800000, 6000000, 6200000, 6400000, 6600000, 6800000, 7000000
101};
James Ban1028a372014-07-14 13:48:45 +0900102
103static unsigned int da9211_buck_get_mode(struct regulator_dev *rdev)
104{
105 int id = rdev_get_id(rdev);
106 struct da9211 *chip = rdev_get_drvdata(rdev);
107 unsigned int data;
108 int ret, mode = 0;
109
110 ret = regmap_read(chip->regmap, DA9211_REG_BUCKA_CONF+id, &data);
111 if (ret < 0)
112 return ret;
113
114 switch (data & 0x03) {
115 case DA9211_BUCK_MODE_SYNC:
116 mode = REGULATOR_MODE_FAST;
117 break;
118 case DA9211_BUCK_MODE_AUTO:
119 mode = REGULATOR_MODE_NORMAL;
120 break;
121 case DA9211_BUCK_MODE_SLEEP:
122 mode = REGULATOR_MODE_STANDBY;
123 break;
124 }
125
126 return mode;
127}
128
129static int da9211_buck_set_mode(struct regulator_dev *rdev,
130 unsigned int mode)
131{
132 int id = rdev_get_id(rdev);
133 struct da9211 *chip = rdev_get_drvdata(rdev);
134 int val = 0;
135
136 switch (mode) {
137 case REGULATOR_MODE_FAST:
138 val = DA9211_BUCK_MODE_SYNC;
139 break;
140 case REGULATOR_MODE_NORMAL:
141 val = DA9211_BUCK_MODE_AUTO;
142 break;
143 case REGULATOR_MODE_STANDBY:
144 val = DA9211_BUCK_MODE_SLEEP;
145 break;
146 }
147
148 return regmap_update_bits(chip->regmap, DA9211_REG_BUCKA_CONF+id,
149 0x03, val);
150}
151
152static int da9211_set_current_limit(struct regulator_dev *rdev, int min,
153 int max)
154{
155 int id = rdev_get_id(rdev);
156 struct da9211 *chip = rdev_get_drvdata(rdev);
James Ban005547e2014-08-08 14:27:04 +0900157 int i, max_size;
158 const int *current_limits;
159
160 switch (chip->chip_id) {
161 case DA9211:
162 current_limits = da9211_current_limits;
163 max_size = ARRAY_SIZE(da9211_current_limits)-1;
164 break;
165 case DA9213:
166 current_limits = da9213_current_limits;
167 max_size = ARRAY_SIZE(da9213_current_limits)-1;
168 break;
James Ban7bd39352015-06-30 13:39:39 +0900169 case DA9215:
170 current_limits = da9215_current_limits;
171 max_size = ARRAY_SIZE(da9215_current_limits)-1;
172 break;
James Ban005547e2014-08-08 14:27:04 +0900173 default:
174 return -EINVAL;
175 }
James Ban1028a372014-07-14 13:48:45 +0900176
177 /* search for closest to maximum */
James Ban005547e2014-08-08 14:27:04 +0900178 for (i = max_size; i >= 0; i--) {
179 if (min <= current_limits[i] &&
180 max >= current_limits[i]) {
James Ban1028a372014-07-14 13:48:45 +0900181 return regmap_update_bits(chip->regmap,
182 DA9211_REG_BUCK_ILIM,
183 (0x0F << id*4), (i << id*4));
184 }
185 }
186
187 return -EINVAL;
188}
189
190static int da9211_get_current_limit(struct regulator_dev *rdev)
191{
192 int id = rdev_get_id(rdev);
193 struct da9211 *chip = rdev_get_drvdata(rdev);
194 unsigned int data;
195 int ret;
James Ban005547e2014-08-08 14:27:04 +0900196 const int *current_limits;
197
198 switch (chip->chip_id) {
199 case DA9211:
200 current_limits = da9211_current_limits;
201 break;
202 case DA9213:
203 current_limits = da9213_current_limits;
204 break;
James Ban7bd39352015-06-30 13:39:39 +0900205 case DA9215:
206 current_limits = da9215_current_limits;
207 break;
James Ban005547e2014-08-08 14:27:04 +0900208 default:
209 return -EINVAL;
210 }
James Ban1028a372014-07-14 13:48:45 +0900211
212 ret = regmap_read(chip->regmap, DA9211_REG_BUCK_ILIM, &data);
213 if (ret < 0)
214 return ret;
215
James Ban005547e2014-08-08 14:27:04 +0900216 /* select one of 16 values: 0000 (2000mA or 3000mA)
217 * to 1111 (5000mA or 6000mA).
218 */
James Ban1028a372014-07-14 13:48:45 +0900219 data = (data >> id*4) & 0x0F;
James Ban005547e2014-08-08 14:27:04 +0900220 return current_limits[data];
James Ban1028a372014-07-14 13:48:45 +0900221}
222
Julia Lawall71242b42015-12-19 16:07:09 +0100223static const struct regulator_ops da9211_buck_ops = {
James Ban1028a372014-07-14 13:48:45 +0900224 .get_mode = da9211_buck_get_mode,
225 .set_mode = da9211_buck_set_mode,
226 .enable = regulator_enable_regmap,
227 .disable = regulator_disable_regmap,
228 .is_enabled = regulator_is_enabled_regmap,
229 .set_voltage_sel = regulator_set_voltage_sel_regmap,
230 .get_voltage_sel = regulator_get_voltage_sel_regmap,
231 .list_voltage = regulator_list_voltage_linear,
232 .set_current_limit = da9211_set_current_limit,
233 .get_current_limit = da9211_get_current_limit,
234};
235
236#define DA9211_BUCK(_id) \
237{\
238 .name = #_id,\
239 .ops = &da9211_buck_ops,\
240 .type = REGULATOR_VOLTAGE,\
241 .id = DA9211_ID_##_id,\
242 .n_voltages = (DA9211_MAX_MV - DA9211_MIN_MV) / DA9211_STEP_MV + 1,\
243 .min_uV = (DA9211_MIN_MV * 1000),\
244 .uV_step = (DA9211_STEP_MV * 1000),\
245 .enable_reg = DA9211_REG_BUCKA_CONT + DA9211_ID_##_id,\
246 .enable_mask = DA9211_BUCKA_EN,\
247 .vsel_reg = DA9211_REG_VBUCKA_A + DA9211_ID_##_id * 2,\
248 .vsel_mask = DA9211_VBUCK_MASK,\
249 .owner = THIS_MODULE,\
250}
251
252static struct regulator_desc da9211_regulators[] = {
253 DA9211_BUCK(BUCKA),
254 DA9211_BUCK(BUCKB),
255};
256
James Banbf3baca2014-08-27 11:47:07 +0900257#ifdef CONFIG_OF
258static struct of_regulator_match da9211_matches[] = {
259 [DA9211_ID_BUCKA] = { .name = "BUCKA" },
260 [DA9211_ID_BUCKB] = { .name = "BUCKB" },
261 };
262
263static struct da9211_pdata *da9211_parse_regulators_dt(
264 struct device *dev)
265{
266 struct da9211_pdata *pdata;
267 struct device_node *node;
268 int i, num, n;
269
270 node = of_get_child_by_name(dev->of_node, "regulators");
271 if (!node) {
272 dev_err(dev, "regulators node not found\n");
273 return ERR_PTR(-ENODEV);
274 }
275
276 num = of_regulator_match(dev, node, da9211_matches,
277 ARRAY_SIZE(da9211_matches));
278 of_node_put(node);
279 if (num < 0) {
280 dev_err(dev, "Failed to match regulators\n");
281 return ERR_PTR(-EINVAL);
282 }
283
284 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
285 if (!pdata)
286 return ERR_PTR(-ENOMEM);
287
288 pdata->num_buck = num;
289
290 n = 0;
291 for (i = 0; i < ARRAY_SIZE(da9211_matches); i++) {
292 if (!da9211_matches[i].init_data)
293 continue;
294
295 pdata->init_data[n] = da9211_matches[i].init_data;
James Ban076c3b82015-01-16 12:13:27 +0900296 pdata->reg_node[n] = da9211_matches[i].of_node;
James Ban8c7dd8b2015-01-28 09:28:08 +0900297 pdata->gpio_ren[n] =
298 of_get_named_gpio(da9211_matches[i].of_node,
299 "enable-gpios", 0);
James Banbf3baca2014-08-27 11:47:07 +0900300 n++;
Fengguang Wuc2a946e2014-08-29 12:41:59 +0100301 }
James Banbf3baca2014-08-27 11:47:07 +0900302
303 return pdata;
304}
305#else
306static struct da9211_pdata *da9211_parse_regulators_dt(
307 struct device *dev)
308{
309 return ERR_PTR(-ENODEV);
310}
311#endif
312
James Ban1028a372014-07-14 13:48:45 +0900313static irqreturn_t da9211_irq_handler(int irq, void *data)
314{
315 struct da9211 *chip = data;
316 int reg_val, err, ret = IRQ_NONE;
317
318 err = regmap_read(chip->regmap, DA9211_REG_EVENT_B, &reg_val);
319 if (err < 0)
320 goto error_i2c;
321
322 if (reg_val & DA9211_E_OV_CURR_A) {
323 regulator_notifier_call_chain(chip->rdev[0],
Geert Uytterhoevena46a0732015-02-23 17:12:16 +0100324 REGULATOR_EVENT_OVER_CURRENT, NULL);
James Ban1028a372014-07-14 13:48:45 +0900325
326 err = regmap_write(chip->regmap, DA9211_REG_EVENT_B,
327 DA9211_E_OV_CURR_A);
328 if (err < 0)
329 goto error_i2c;
330
331 ret = IRQ_HANDLED;
332 }
333
334 if (reg_val & DA9211_E_OV_CURR_B) {
335 regulator_notifier_call_chain(chip->rdev[1],
Geert Uytterhoevena46a0732015-02-23 17:12:16 +0100336 REGULATOR_EVENT_OVER_CURRENT, NULL);
James Ban1028a372014-07-14 13:48:45 +0900337
338 err = regmap_write(chip->regmap, DA9211_REG_EVENT_B,
339 DA9211_E_OV_CURR_B);
340 if (err < 0)
341 goto error_i2c;
342
343 ret = IRQ_HANDLED;
344 }
345
346 return ret;
347
348error_i2c:
349 dev_err(chip->dev, "I2C error : %d\n", err);
350 return IRQ_NONE;
351}
352
353static int da9211_regulator_init(struct da9211 *chip)
354{
355 struct regulator_config config = { };
356 int i, ret;
357 unsigned int data;
358
359 ret = regmap_read(chip->regmap, DA9211_REG_CONFIG_E, &data);
360 if (ret < 0) {
Geert Uytterhoeven767e8aa2015-02-23 17:11:07 +0100361 dev_err(chip->dev, "Failed to read CONFIG_E reg: %d\n", ret);
Axel Lin516c1512014-07-20 19:19:35 +0800362 return ret;
James Ban1028a372014-07-14 13:48:45 +0900363 }
364
365 data &= DA9211_SLAVE_SEL;
366 /* If configuration for 1/2 bucks is different between platform data
367 * and the register, driver should exit.
368 */
James Ban7bd39352015-06-30 13:39:39 +0900369 if (chip->pdata->num_buck == 1 && data == 0x00)
370 chip->num_regulator = 1;
371 else if (chip->pdata->num_buck == 2 && data != 0x00)
372 chip->num_regulator = 2;
373 else {
James Ban1028a372014-07-14 13:48:45 +0900374 dev_err(chip->dev, "Configuration is mismatched\n");
Axel Lin516c1512014-07-20 19:19:35 +0800375 return -EINVAL;
James Ban1028a372014-07-14 13:48:45 +0900376 }
377
378 for (i = 0; i < chip->num_regulator; i++) {
James Banbf3baca2014-08-27 11:47:07 +0900379 config.init_data = chip->pdata->init_data[i];
James Ban1028a372014-07-14 13:48:45 +0900380 config.dev = chip->dev;
381 config.driver_data = chip;
382 config.regmap = chip->regmap;
James Ban076c3b82015-01-16 12:13:27 +0900383 config.of_node = chip->pdata->reg_node[i];
James Ban1028a372014-07-14 13:48:45 +0900384
James Ban8c7dd8b2015-01-28 09:28:08 +0900385 if (gpio_is_valid(chip->pdata->gpio_ren[i])) {
386 config.ena_gpio = chip->pdata->gpio_ren[i];
387 config.ena_gpio_initialized = true;
388 } else {
389 config.ena_gpio = -EINVAL;
390 config.ena_gpio_initialized = false;
391 }
392
James Ban1028a372014-07-14 13:48:45 +0900393 chip->rdev[i] = devm_regulator_register(chip->dev,
394 &da9211_regulators[i], &config);
395 if (IS_ERR(chip->rdev[i])) {
396 dev_err(chip->dev,
397 "Failed to register DA9211 regulator\n");
Axel Lin516c1512014-07-20 19:19:35 +0800398 return PTR_ERR(chip->rdev[i]);
James Ban1028a372014-07-14 13:48:45 +0900399 }
400
401 if (chip->chip_irq != 0) {
402 ret = regmap_update_bits(chip->regmap,
James Ban4e7089f2014-09-29 16:59:20 +0900403 DA9211_REG_MASK_B, DA9211_M_OV_CURR_A << i, 0);
James Ban1028a372014-07-14 13:48:45 +0900404 if (ret < 0) {
405 dev_err(chip->dev,
406 "Failed to update mask reg: %d\n", ret);
Axel Lin516c1512014-07-20 19:19:35 +0800407 return ret;
James Ban1028a372014-07-14 13:48:45 +0900408 }
409 }
410 }
411
412 return 0;
James Ban1028a372014-07-14 13:48:45 +0900413}
James Banbf3baca2014-08-27 11:47:07 +0900414
James Ban1028a372014-07-14 13:48:45 +0900415/*
416 * I2C driver interface functions
417 */
418static int da9211_i2c_probe(struct i2c_client *i2c,
419 const struct i2c_device_id *id)
420{
421 struct da9211 *chip;
422 int error, ret;
James Ban005547e2014-08-08 14:27:04 +0900423 unsigned int data;
James Ban1028a372014-07-14 13:48:45 +0900424
425 chip = devm_kzalloc(&i2c->dev, sizeof(struct da9211), GFP_KERNEL);
Axel Lin1d3e6a62014-08-17 18:34:48 +0800426 if (!chip)
427 return -ENOMEM;
James Ban1028a372014-07-14 13:48:45 +0900428
429 chip->dev = &i2c->dev;
430 chip->regmap = devm_regmap_init_i2c(i2c, &da9211_regmap_config);
431 if (IS_ERR(chip->regmap)) {
432 error = PTR_ERR(chip->regmap);
James Ban005547e2014-08-08 14:27:04 +0900433 dev_err(chip->dev, "Failed to allocate register map: %d\n",
James Ban1028a372014-07-14 13:48:45 +0900434 error);
435 return error;
436 }
437
438 i2c_set_clientdata(i2c, chip);
439
440 chip->pdata = i2c->dev.platform_data;
James Ban005547e2014-08-08 14:27:04 +0900441
442 ret = regmap_read(chip->regmap, DA9211_REG_DEVICE_ID, &data);
443 if (ret < 0) {
444 dev_err(chip->dev, "Failed to read DEVICE_ID reg: %d\n", ret);
445 return ret;
446 }
447
448 switch (data) {
449 case DA9211_DEVICE_ID:
450 chip->chip_id = DA9211;
451 break;
452 case DA9213_DEVICE_ID:
453 chip->chip_id = DA9213;
454 break;
James Ban7bd39352015-06-30 13:39:39 +0900455 case DA9215_DEVICE_ID:
456 chip->chip_id = DA9215;
457 break;
James Ban005547e2014-08-08 14:27:04 +0900458 default:
459 dev_err(chip->dev, "Unsupported device id = 0x%x.\n", data);
James Ban1028a372014-07-14 13:48:45 +0900460 return -ENODEV;
461 }
462
James Banbf3baca2014-08-27 11:47:07 +0900463 if (!chip->pdata)
464 chip->pdata = da9211_parse_regulators_dt(chip->dev);
465
466 if (IS_ERR(chip->pdata)) {
467 dev_err(chip->dev, "No regulators defined for the platform\n");
468 return PTR_ERR(chip->pdata);
469 }
470
James Ban1028a372014-07-14 13:48:45 +0900471 chip->chip_irq = i2c->irq;
472
473 if (chip->chip_irq != 0) {
474 ret = devm_request_threaded_irq(chip->dev, chip->chip_irq, NULL,
475 da9211_irq_handler,
476 IRQF_TRIGGER_LOW|IRQF_ONESHOT,
477 "da9211", chip);
478 if (ret != 0) {
479 dev_err(chip->dev, "Failed to request IRQ: %d\n",
480 chip->chip_irq);
481 return ret;
482 }
483 } else {
484 dev_warn(chip->dev, "No IRQ configured\n");
485 }
486
487 ret = da9211_regulator_init(chip);
488
489 if (ret < 0)
James Ban005547e2014-08-08 14:27:04 +0900490 dev_err(chip->dev, "Failed to initialize regulator: %d\n", ret);
James Ban1028a372014-07-14 13:48:45 +0900491
492 return ret;
493}
494
James Ban1028a372014-07-14 13:48:45 +0900495static const struct i2c_device_id da9211_i2c_id[] = {
Axel Lin6a52f562014-09-05 09:12:55 +0800496 {"da9211", DA9211},
James Ban7524c1c2016-06-29 16:49:32 +0900497 {"da9212", DA9212},
Axel Lin6a52f562014-09-05 09:12:55 +0800498 {"da9213", DA9213},
James Ban7524c1c2016-06-29 16:49:32 +0900499 {"da9214", DA9214},
James Ban7bd39352015-06-30 13:39:39 +0900500 {"da9215", DA9215},
James Ban1028a372014-07-14 13:48:45 +0900501 {},
502};
James Ban1028a372014-07-14 13:48:45 +0900503MODULE_DEVICE_TABLE(i2c, da9211_i2c_id);
504
Axel Lin6a52f562014-09-05 09:12:55 +0800505#ifdef CONFIG_OF
506static const struct of_device_id da9211_dt_ids[] = {
507 { .compatible = "dlg,da9211", .data = &da9211_i2c_id[0] },
James Ban7524c1c2016-06-29 16:49:32 +0900508 { .compatible = "dlg,da9212", .data = &da9211_i2c_id[1] },
509 { .compatible = "dlg,da9213", .data = &da9211_i2c_id[2] },
510 { .compatible = "dlg,da9214", .data = &da9211_i2c_id[3] },
511 { .compatible = "dlg,da9215", .data = &da9211_i2c_id[4] },
Axel Lin6a52f562014-09-05 09:12:55 +0800512 {},
513};
514MODULE_DEVICE_TABLE(of, da9211_dt_ids);
515#endif
516
James Ban1028a372014-07-14 13:48:45 +0900517static struct i2c_driver da9211_regulator_driver = {
518 .driver = {
519 .name = "da9211",
Axel Lin6a52f562014-09-05 09:12:55 +0800520 .of_match_table = of_match_ptr(da9211_dt_ids),
James Ban1028a372014-07-14 13:48:45 +0900521 },
522 .probe = da9211_i2c_probe,
James Ban1028a372014-07-14 13:48:45 +0900523 .id_table = da9211_i2c_id,
524};
525
526module_i2c_driver(da9211_regulator_driver);
527
528MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
James Ban7524c1c2016-06-29 16:49:32 +0900529MODULE_DESCRIPTION("DA9211/DA9212/DA9213/DA9214/DA9215 regulator driver");
James Ban7bd39352015-06-30 13:39:39 +0900530MODULE_LICENSE("GPL");