This source file includes following definitions.
- da9211_buck_get_mode
- da9211_buck_set_mode
- da9211_set_current_limit
- da9211_get_current_limit
- da9211_parse_regulators_dt
- da9211_parse_regulators_dt
- da9211_irq_handler
- da9211_regulator_init
- da9211_i2c_probe
1
2
3
4
5
6
7 #include <linux/err.h>
8 #include <linux/i2c.h>
9 #include <linux/module.h>
10 #include <linux/init.h>
11 #include <linux/slab.h>
12 #include <linux/regulator/driver.h>
13 #include <linux/regulator/machine.h>
14 #include <linux/regmap.h>
15 #include <linux/irq.h>
16 #include <linux/interrupt.h>
17 #include <linux/gpio/consumer.h>
18 #include <linux/regulator/of_regulator.h>
19 #include <linux/regulator/da9211.h>
20 #include "da9211-regulator.h"
21
22
23 #define DA9211_DEVICE_ID 0x22
24 #define DA9213_DEVICE_ID 0x23
25 #define DA9215_DEVICE_ID 0x24
26
27 #define DA9211_BUCK_MODE_SLEEP 1
28 #define DA9211_BUCK_MODE_SYNC 2
29 #define DA9211_BUCK_MODE_AUTO 3
30
31
32 #define DA9211_ID_BUCKA 0
33 #define DA9211_ID_BUCKB 1
34
35 struct da9211 {
36 struct device *dev;
37 struct regmap *regmap;
38 struct da9211_pdata *pdata;
39 struct regulator_dev *rdev[DA9211_MAX_REGULATORS];
40 int num_regulator;
41 int chip_irq;
42 int chip_id;
43 };
44
45 static const struct regmap_range_cfg da9211_regmap_range[] = {
46 {
47 .selector_reg = DA9211_REG_PAGE_CON,
48 .selector_mask = DA9211_REG_PAGE_MASK,
49 .selector_shift = DA9211_REG_PAGE_SHIFT,
50 .window_start = 0,
51 .window_len = 256,
52 .range_min = 0,
53 .range_max = 5*128,
54 },
55 };
56
57 static const struct regmap_config da9211_regmap_config = {
58 .reg_bits = 8,
59 .val_bits = 8,
60 .max_register = 5 * 128,
61 .ranges = da9211_regmap_range,
62 .num_ranges = ARRAY_SIZE(da9211_regmap_range),
63 };
64
65
66 #define DA9211_MIN_MV 300
67 #define DA9211_MAX_MV 1570
68 #define DA9211_STEP_MV 10
69
70
71
72
73 static const int da9211_current_limits[] = {
74 2000000, 2200000, 2400000, 2600000, 2800000, 3000000, 3200000, 3400000,
75 3600000, 3800000, 4000000, 4200000, 4400000, 4600000, 4800000, 5000000
76 };
77
78
79
80 static const int da9213_current_limits[] = {
81 3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
82 4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
83 };
84
85
86
87 static const int da9215_current_limits[] = {
88 4000000, 4200000, 4400000, 4600000, 4800000, 5000000, 5200000, 5400000,
89 5600000, 5800000, 6000000, 6200000, 6400000, 6600000, 6800000, 7000000
90 };
91
92 static unsigned int da9211_buck_get_mode(struct regulator_dev *rdev)
93 {
94 int id = rdev_get_id(rdev);
95 struct da9211 *chip = rdev_get_drvdata(rdev);
96 unsigned int data;
97 int ret, mode = 0;
98
99 ret = regmap_read(chip->regmap, DA9211_REG_BUCKA_CONF+id, &data);
100 if (ret < 0)
101 return ret;
102
103 switch (data & 0x03) {
104 case DA9211_BUCK_MODE_SYNC:
105 mode = REGULATOR_MODE_FAST;
106 break;
107 case DA9211_BUCK_MODE_AUTO:
108 mode = REGULATOR_MODE_NORMAL;
109 break;
110 case DA9211_BUCK_MODE_SLEEP:
111 mode = REGULATOR_MODE_STANDBY;
112 break;
113 }
114
115 return mode;
116 }
117
118 static int da9211_buck_set_mode(struct regulator_dev *rdev,
119 unsigned int mode)
120 {
121 int id = rdev_get_id(rdev);
122 struct da9211 *chip = rdev_get_drvdata(rdev);
123 int val = 0;
124
125 switch (mode) {
126 case REGULATOR_MODE_FAST:
127 val = DA9211_BUCK_MODE_SYNC;
128 break;
129 case REGULATOR_MODE_NORMAL:
130 val = DA9211_BUCK_MODE_AUTO;
131 break;
132 case REGULATOR_MODE_STANDBY:
133 val = DA9211_BUCK_MODE_SLEEP;
134 break;
135 }
136
137 return regmap_update_bits(chip->regmap, DA9211_REG_BUCKA_CONF+id,
138 0x03, val);
139 }
140
141 static int da9211_set_current_limit(struct regulator_dev *rdev, int min,
142 int max)
143 {
144 int id = rdev_get_id(rdev);
145 struct da9211 *chip = rdev_get_drvdata(rdev);
146 int i, max_size;
147 const int *current_limits;
148
149 switch (chip->chip_id) {
150 case DA9211:
151 current_limits = da9211_current_limits;
152 max_size = ARRAY_SIZE(da9211_current_limits)-1;
153 break;
154 case DA9213:
155 current_limits = da9213_current_limits;
156 max_size = ARRAY_SIZE(da9213_current_limits)-1;
157 break;
158 case DA9215:
159 current_limits = da9215_current_limits;
160 max_size = ARRAY_SIZE(da9215_current_limits)-1;
161 break;
162 default:
163 return -EINVAL;
164 }
165
166
167 for (i = max_size; i >= 0; i--) {
168 if (min <= current_limits[i] &&
169 max >= current_limits[i]) {
170 return regmap_update_bits(chip->regmap,
171 DA9211_REG_BUCK_ILIM,
172 (0x0F << id*4), (i << id*4));
173 }
174 }
175
176 return -EINVAL;
177 }
178
179 static int da9211_get_current_limit(struct regulator_dev *rdev)
180 {
181 int id = rdev_get_id(rdev);
182 struct da9211 *chip = rdev_get_drvdata(rdev);
183 unsigned int data;
184 int ret;
185 const int *current_limits;
186
187 switch (chip->chip_id) {
188 case DA9211:
189 current_limits = da9211_current_limits;
190 break;
191 case DA9213:
192 current_limits = da9213_current_limits;
193 break;
194 case DA9215:
195 current_limits = da9215_current_limits;
196 break;
197 default:
198 return -EINVAL;
199 }
200
201 ret = regmap_read(chip->regmap, DA9211_REG_BUCK_ILIM, &data);
202 if (ret < 0)
203 return ret;
204
205
206
207
208 data = (data >> id*4) & 0x0F;
209 return current_limits[data];
210 }
211
212 static const struct regulator_ops da9211_buck_ops = {
213 .get_mode = da9211_buck_get_mode,
214 .set_mode = da9211_buck_set_mode,
215 .enable = regulator_enable_regmap,
216 .disable = regulator_disable_regmap,
217 .is_enabled = regulator_is_enabled_regmap,
218 .set_voltage_sel = regulator_set_voltage_sel_regmap,
219 .get_voltage_sel = regulator_get_voltage_sel_regmap,
220 .list_voltage = regulator_list_voltage_linear,
221 .set_current_limit = da9211_set_current_limit,
222 .get_current_limit = da9211_get_current_limit,
223 };
224
225 #define DA9211_BUCK(_id) \
226 {\
227 .name = #_id,\
228 .ops = &da9211_buck_ops,\
229 .type = REGULATOR_VOLTAGE,\
230 .id = DA9211_ID_##_id,\
231 .n_voltages = (DA9211_MAX_MV - DA9211_MIN_MV) / DA9211_STEP_MV + 1,\
232 .min_uV = (DA9211_MIN_MV * 1000),\
233 .uV_step = (DA9211_STEP_MV * 1000),\
234 .enable_reg = DA9211_REG_BUCKA_CONT + DA9211_ID_##_id,\
235 .enable_mask = DA9211_BUCKA_EN,\
236 .vsel_reg = DA9211_REG_VBUCKA_A + DA9211_ID_##_id * 2,\
237 .vsel_mask = DA9211_VBUCK_MASK,\
238 .owner = THIS_MODULE,\
239 }
240
241 static struct regulator_desc da9211_regulators[] = {
242 DA9211_BUCK(BUCKA),
243 DA9211_BUCK(BUCKB),
244 };
245
246 #ifdef CONFIG_OF
247 static struct of_regulator_match da9211_matches[] = {
248 [DA9211_ID_BUCKA] = { .name = "BUCKA" },
249 [DA9211_ID_BUCKB] = { .name = "BUCKB" },
250 };
251
252 static struct da9211_pdata *da9211_parse_regulators_dt(
253 struct device *dev)
254 {
255 struct da9211_pdata *pdata;
256 struct device_node *node;
257 int i, num, n;
258
259 node = of_get_child_by_name(dev->of_node, "regulators");
260 if (!node) {
261 dev_err(dev, "regulators node not found\n");
262 return ERR_PTR(-ENODEV);
263 }
264
265 num = of_regulator_match(dev, node, da9211_matches,
266 ARRAY_SIZE(da9211_matches));
267 of_node_put(node);
268 if (num < 0) {
269 dev_err(dev, "Failed to match regulators\n");
270 return ERR_PTR(-EINVAL);
271 }
272
273 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
274 if (!pdata)
275 return ERR_PTR(-ENOMEM);
276
277 pdata->num_buck = num;
278
279 n = 0;
280 for (i = 0; i < ARRAY_SIZE(da9211_matches); i++) {
281 if (!da9211_matches[i].init_data)
282 continue;
283
284 pdata->init_data[n] = da9211_matches[i].init_data;
285 pdata->reg_node[n] = da9211_matches[i].of_node;
286 pdata->gpiod_ren[n] = devm_gpiod_get_from_of_node(dev,
287 da9211_matches[i].of_node,
288 "enable-gpios",
289 0,
290 GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE,
291 "da9211-enable");
292 if (IS_ERR(pdata->gpiod_ren[n]))
293 pdata->gpiod_ren[n] = NULL;
294 n++;
295 }
296
297 return pdata;
298 }
299 #else
300 static struct da9211_pdata *da9211_parse_regulators_dt(
301 struct device *dev)
302 {
303 return ERR_PTR(-ENODEV);
304 }
305 #endif
306
307 static irqreturn_t da9211_irq_handler(int irq, void *data)
308 {
309 struct da9211 *chip = data;
310 int reg_val, err, ret = IRQ_NONE;
311
312 err = regmap_read(chip->regmap, DA9211_REG_EVENT_B, ®_val);
313 if (err < 0)
314 goto error_i2c;
315
316 if (reg_val & DA9211_E_OV_CURR_A) {
317 regulator_lock(chip->rdev[0]);
318 regulator_notifier_call_chain(chip->rdev[0],
319 REGULATOR_EVENT_OVER_CURRENT, NULL);
320 regulator_unlock(chip->rdev[0]);
321
322 err = regmap_write(chip->regmap, DA9211_REG_EVENT_B,
323 DA9211_E_OV_CURR_A);
324 if (err < 0)
325 goto error_i2c;
326
327 ret = IRQ_HANDLED;
328 }
329
330 if (reg_val & DA9211_E_OV_CURR_B) {
331 regulator_lock(chip->rdev[1]);
332 regulator_notifier_call_chain(chip->rdev[1],
333 REGULATOR_EVENT_OVER_CURRENT, NULL);
334 regulator_unlock(chip->rdev[1]);
335
336 err = regmap_write(chip->regmap, DA9211_REG_EVENT_B,
337 DA9211_E_OV_CURR_B);
338 if (err < 0)
339 goto error_i2c;
340
341 ret = IRQ_HANDLED;
342 }
343
344 return ret;
345
346 error_i2c:
347 dev_err(chip->dev, "I2C error : %d\n", err);
348 return IRQ_NONE;
349 }
350
351 static int da9211_regulator_init(struct da9211 *chip)
352 {
353 struct regulator_config config = { };
354 int i, ret;
355 unsigned int data;
356
357 ret = regmap_read(chip->regmap, DA9211_REG_CONFIG_E, &data);
358 if (ret < 0) {
359 dev_err(chip->dev, "Failed to read CONFIG_E reg: %d\n", ret);
360 return ret;
361 }
362
363 data &= DA9211_SLAVE_SEL;
364
365
366
367 if (chip->pdata->num_buck == 1 && data == 0x00)
368 chip->num_regulator = 1;
369 else if (chip->pdata->num_buck == 2 && data != 0x00)
370 chip->num_regulator = 2;
371 else {
372 dev_err(chip->dev, "Configuration is mismatched\n");
373 return -EINVAL;
374 }
375
376 for (i = 0; i < chip->num_regulator; i++) {
377 config.init_data = chip->pdata->init_data[i];
378 config.dev = chip->dev;
379 config.driver_data = chip;
380 config.regmap = chip->regmap;
381 config.of_node = chip->pdata->reg_node[i];
382
383 if (chip->pdata->gpiod_ren[i])
384 config.ena_gpiod = chip->pdata->gpiod_ren[i];
385 else
386 config.ena_gpiod = NULL;
387
388
389
390
391
392 if (config.ena_gpiod)
393 devm_gpiod_unhinge(chip->dev, config.ena_gpiod);
394 chip->rdev[i] = devm_regulator_register(chip->dev,
395 &da9211_regulators[i], &config);
396 if (IS_ERR(chip->rdev[i])) {
397 dev_err(chip->dev,
398 "Failed to register DA9211 regulator\n");
399 return PTR_ERR(chip->rdev[i]);
400 }
401
402 if (chip->chip_irq != 0) {
403 ret = regmap_update_bits(chip->regmap,
404 DA9211_REG_MASK_B, DA9211_M_OV_CURR_A << i, 0);
405 if (ret < 0) {
406 dev_err(chip->dev,
407 "Failed to update mask reg: %d\n", ret);
408 return ret;
409 }
410 }
411 }
412
413 return 0;
414 }
415
416
417
418
419 static int da9211_i2c_probe(struct i2c_client *i2c,
420 const struct i2c_device_id *id)
421 {
422 struct da9211 *chip;
423 int error, ret;
424 unsigned int data;
425
426 chip = devm_kzalloc(&i2c->dev, sizeof(struct da9211), GFP_KERNEL);
427 if (!chip)
428 return -ENOMEM;
429
430 chip->dev = &i2c->dev;
431 chip->regmap = devm_regmap_init_i2c(i2c, &da9211_regmap_config);
432 if (IS_ERR(chip->regmap)) {
433 error = PTR_ERR(chip->regmap);
434 dev_err(chip->dev, "Failed to allocate register map: %d\n",
435 error);
436 return error;
437 }
438
439 i2c_set_clientdata(i2c, chip);
440
441 chip->pdata = i2c->dev.platform_data;
442
443 ret = regmap_read(chip->regmap, DA9211_REG_DEVICE_ID, &data);
444 if (ret < 0) {
445 dev_err(chip->dev, "Failed to read DEVICE_ID reg: %d\n", ret);
446 return ret;
447 }
448
449 switch (data) {
450 case DA9211_DEVICE_ID:
451 chip->chip_id = DA9211;
452 break;
453 case DA9213_DEVICE_ID:
454 chip->chip_id = DA9213;
455 break;
456 case DA9215_DEVICE_ID:
457 chip->chip_id = DA9215;
458 break;
459 default:
460 dev_err(chip->dev, "Unsupported device id = 0x%x.\n", data);
461 return -ENODEV;
462 }
463
464 if (!chip->pdata)
465 chip->pdata = da9211_parse_regulators_dt(chip->dev);
466
467 if (IS_ERR(chip->pdata)) {
468 dev_err(chip->dev, "No regulators defined for the platform\n");
469 return PTR_ERR(chip->pdata);
470 }
471
472 chip->chip_irq = i2c->irq;
473
474 if (chip->chip_irq != 0) {
475 ret = devm_request_threaded_irq(chip->dev, chip->chip_irq, NULL,
476 da9211_irq_handler,
477 IRQF_TRIGGER_LOW|IRQF_ONESHOT,
478 "da9211", chip);
479 if (ret != 0) {
480 dev_err(chip->dev, "Failed to request IRQ: %d\n",
481 chip->chip_irq);
482 return ret;
483 }
484 } else {
485 dev_warn(chip->dev, "No IRQ configured\n");
486 }
487
488 ret = da9211_regulator_init(chip);
489
490 if (ret < 0)
491 dev_err(chip->dev, "Failed to initialize regulator: %d\n", ret);
492
493 return ret;
494 }
495
496 static const struct i2c_device_id da9211_i2c_id[] = {
497 {"da9211", DA9211},
498 {"da9212", DA9212},
499 {"da9213", DA9213},
500 {"da9223", DA9223},
501 {"da9214", DA9214},
502 {"da9224", DA9224},
503 {"da9215", DA9215},
504 {"da9225", DA9225},
505 {},
506 };
507 MODULE_DEVICE_TABLE(i2c, da9211_i2c_id);
508
509 #ifdef CONFIG_OF
510 static const struct of_device_id da9211_dt_ids[] = {
511 { .compatible = "dlg,da9211", .data = &da9211_i2c_id[0] },
512 { .compatible = "dlg,da9212", .data = &da9211_i2c_id[1] },
513 { .compatible = "dlg,da9213", .data = &da9211_i2c_id[2] },
514 { .compatible = "dlg,da9223", .data = &da9211_i2c_id[3] },
515 { .compatible = "dlg,da9214", .data = &da9211_i2c_id[4] },
516 { .compatible = "dlg,da9224", .data = &da9211_i2c_id[5] },
517 { .compatible = "dlg,da9215", .data = &da9211_i2c_id[6] },
518 { .compatible = "dlg,da9225", .data = &da9211_i2c_id[7] },
519 {},
520 };
521 MODULE_DEVICE_TABLE(of, da9211_dt_ids);
522 #endif
523
524 static struct i2c_driver da9211_regulator_driver = {
525 .driver = {
526 .name = "da9211",
527 .of_match_table = of_match_ptr(da9211_dt_ids),
528 },
529 .probe = da9211_i2c_probe,
530 .id_table = da9211_i2c_id,
531 };
532
533 module_i2c_driver(da9211_regulator_driver);
534
535 MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
536 MODULE_DESCRIPTION("DA9211/DA9212/DA9213/DA9223/DA9214/DA9224/DA9215/DA9225 regulator driver");
537 MODULE_LICENSE("GPL");