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17#include <linux/err.h>
18#include <linux/i2c.h>
19#include <linux/module.h>
20#include <linux/init.h>
21#include <linux/slab.h>
22#include <linux/regulator/driver.h>
23#include <linux/regulator/machine.h>
24#include <linux/regmap.h>
25#include <linux/irq.h>
26#include <linux/interrupt.h>
27#include <linux/gpio/consumer.h>
28#include <linux/regulator/of_regulator.h>
29#include <linux/regulator/da9211.h>
30#include "da9211-regulator.h"
31
32
33#define DA9211_DEVICE_ID 0x22
34#define DA9213_DEVICE_ID 0x23
35#define DA9215_DEVICE_ID 0x24
36
37#define DA9211_BUCK_MODE_SLEEP 1
38#define DA9211_BUCK_MODE_SYNC 2
39#define DA9211_BUCK_MODE_AUTO 3
40
41
42#define DA9211_ID_BUCKA 0
43#define DA9211_ID_BUCKB 1
44
45struct da9211 {
46 struct device *dev;
47 struct regmap *regmap;
48 struct da9211_pdata *pdata;
49 struct regulator_dev *rdev[DA9211_MAX_REGULATORS];
50 int num_regulator;
51 int chip_irq;
52 int chip_id;
53};
54
55static const struct regmap_range_cfg da9211_regmap_range[] = {
56 {
57 .selector_reg = DA9211_REG_PAGE_CON,
58 .selector_mask = DA9211_REG_PAGE_MASK,
59 .selector_shift = DA9211_REG_PAGE_SHIFT,
60 .window_start = 0,
61 .window_len = 256,
62 .range_min = 0,
63 .range_max = 5*128,
64 },
65};
66
67static const struct regmap_config da9211_regmap_config = {
68 .reg_bits = 8,
69 .val_bits = 8,
70 .max_register = 5 * 128,
71 .ranges = da9211_regmap_range,
72 .num_ranges = ARRAY_SIZE(da9211_regmap_range),
73};
74
75
76#define DA9211_MIN_MV 300
77#define DA9211_MAX_MV 1570
78#define DA9211_STEP_MV 10
79
80
81
82
83static const int da9211_current_limits[] = {
84 2000000, 2200000, 2400000, 2600000, 2800000, 3000000, 3200000, 3400000,
85 3600000, 3800000, 4000000, 4200000, 4400000, 4600000, 4800000, 5000000
86};
87
88
89
90static const int da9213_current_limits[] = {
91 3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
92 4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
93};
94
95
96
97static const int da9215_current_limits[] = {
98 4000000, 4200000, 4400000, 4600000, 4800000, 5000000, 5200000, 5400000,
99 5600000, 5800000, 6000000, 6200000, 6400000, 6600000, 6800000, 7000000
100};
101
102static unsigned int da9211_buck_get_mode(struct regulator_dev *rdev)
103{
104 int id = rdev_get_id(rdev);
105 struct da9211 *chip = rdev_get_drvdata(rdev);
106 unsigned int data;
107 int ret, mode = 0;
108
109 ret = regmap_read(chip->regmap, DA9211_REG_BUCKA_CONF+id, &data);
110 if (ret < 0)
111 return ret;
112
113 switch (data & 0x03) {
114 case DA9211_BUCK_MODE_SYNC:
115 mode = REGULATOR_MODE_FAST;
116 break;
117 case DA9211_BUCK_MODE_AUTO:
118 mode = REGULATOR_MODE_NORMAL;
119 break;
120 case DA9211_BUCK_MODE_SLEEP:
121 mode = REGULATOR_MODE_STANDBY;
122 break;
123 }
124
125 return mode;
126}
127
128static int da9211_buck_set_mode(struct regulator_dev *rdev,
129 unsigned int mode)
130{
131 int id = rdev_get_id(rdev);
132 struct da9211 *chip = rdev_get_drvdata(rdev);
133 int val = 0;
134
135 switch (mode) {
136 case REGULATOR_MODE_FAST:
137 val = DA9211_BUCK_MODE_SYNC;
138 break;
139 case REGULATOR_MODE_NORMAL:
140 val = DA9211_BUCK_MODE_AUTO;
141 break;
142 case REGULATOR_MODE_STANDBY:
143 val = DA9211_BUCK_MODE_SLEEP;
144 break;
145 }
146
147 return regmap_update_bits(chip->regmap, DA9211_REG_BUCKA_CONF+id,
148 0x03, val);
149}
150
151static int da9211_set_current_limit(struct regulator_dev *rdev, int min,
152 int max)
153{
154 int id = rdev_get_id(rdev);
155 struct da9211 *chip = rdev_get_drvdata(rdev);
156 int i, max_size;
157 const int *current_limits;
158
159 switch (chip->chip_id) {
160 case DA9211:
161 current_limits = da9211_current_limits;
162 max_size = ARRAY_SIZE(da9211_current_limits)-1;
163 break;
164 case DA9213:
165 current_limits = da9213_current_limits;
166 max_size = ARRAY_SIZE(da9213_current_limits)-1;
167 break;
168 case DA9215:
169 current_limits = da9215_current_limits;
170 max_size = ARRAY_SIZE(da9215_current_limits)-1;
171 break;
172 default:
173 return -EINVAL;
174 }
175
176
177 for (i = max_size; i >= 0; i--) {
178 if (min <= current_limits[i] &&
179 max >= current_limits[i]) {
180 return regmap_update_bits(chip->regmap,
181 DA9211_REG_BUCK_ILIM,
182 (0x0F << id*4), (i << id*4));
183 }
184 }
185
186 return -EINVAL;
187}
188
189static int da9211_get_current_limit(struct regulator_dev *rdev)
190{
191 int id = rdev_get_id(rdev);
192 struct da9211 *chip = rdev_get_drvdata(rdev);
193 unsigned int data;
194 int ret;
195 const int *current_limits;
196
197 switch (chip->chip_id) {
198 case DA9211:
199 current_limits = da9211_current_limits;
200 break;
201 case DA9213:
202 current_limits = da9213_current_limits;
203 break;
204 case DA9215:
205 current_limits = da9215_current_limits;
206 break;
207 default:
208 return -EINVAL;
209 }
210
211 ret = regmap_read(chip->regmap, DA9211_REG_BUCK_ILIM, &data);
212 if (ret < 0)
213 return ret;
214
215
216
217
218 data = (data >> id*4) & 0x0F;
219 return current_limits[data];
220}
221
222static const struct regulator_ops da9211_buck_ops = {
223 .get_mode = da9211_buck_get_mode,
224 .set_mode = da9211_buck_set_mode,
225 .enable = regulator_enable_regmap,
226 .disable = regulator_disable_regmap,
227 .is_enabled = regulator_is_enabled_regmap,
228 .set_voltage_sel = regulator_set_voltage_sel_regmap,
229 .get_voltage_sel = regulator_get_voltage_sel_regmap,
230 .list_voltage = regulator_list_voltage_linear,
231 .set_current_limit = da9211_set_current_limit,
232 .get_current_limit = da9211_get_current_limit,
233};
234
235#define DA9211_BUCK(_id) \
236{\
237 .name = #_id,\
238 .ops = &da9211_buck_ops,\
239 .type = REGULATOR_VOLTAGE,\
240 .id = DA9211_ID_##_id,\
241 .n_voltages = (DA9211_MAX_MV - DA9211_MIN_MV) / DA9211_STEP_MV + 1,\
242 .min_uV = (DA9211_MIN_MV * 1000),\
243 .uV_step = (DA9211_STEP_MV * 1000),\
244 .enable_reg = DA9211_REG_BUCKA_CONT + DA9211_ID_##_id,\
245 .enable_mask = DA9211_BUCKA_EN,\
246 .vsel_reg = DA9211_REG_VBUCKA_A + DA9211_ID_##_id * 2,\
247 .vsel_mask = DA9211_VBUCK_MASK,\
248 .owner = THIS_MODULE,\
249}
250
251static struct regulator_desc da9211_regulators[] = {
252 DA9211_BUCK(BUCKA),
253 DA9211_BUCK(BUCKB),
254};
255
256#ifdef CONFIG_OF
257static struct of_regulator_match da9211_matches[] = {
258 [DA9211_ID_BUCKA] = { .name = "BUCKA" },
259 [DA9211_ID_BUCKB] = { .name = "BUCKB" },
260 };
261
262static struct da9211_pdata *da9211_parse_regulators_dt(
263 struct device *dev)
264{
265 struct da9211_pdata *pdata;
266 struct device_node *node;
267 int i, num, n;
268
269 node = of_get_child_by_name(dev->of_node, "regulators");
270 if (!node) {
271 dev_err(dev, "regulators node not found\n");
272 return ERR_PTR(-ENODEV);
273 }
274
275 num = of_regulator_match(dev, node, da9211_matches,
276 ARRAY_SIZE(da9211_matches));
277 of_node_put(node);
278 if (num < 0) {
279 dev_err(dev, "Failed to match regulators\n");
280 return ERR_PTR(-EINVAL);
281 }
282
283 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
284 if (!pdata)
285 return ERR_PTR(-ENOMEM);
286
287 pdata->num_buck = num;
288
289 n = 0;
290 for (i = 0; i < ARRAY_SIZE(da9211_matches); i++) {
291 if (!da9211_matches[i].init_data)
292 continue;
293
294 pdata->init_data[n] = da9211_matches[i].init_data;
295 pdata->reg_node[n] = da9211_matches[i].of_node;
296 pdata->gpiod_ren[n] = devm_gpiod_get_from_of_node(dev,
297 da9211_matches[i].of_node,
298 "enable",
299 0,
300 GPIOD_OUT_HIGH,
301 "da9211-enable");
302 if (IS_ERR(pdata->gpiod_ren[n]))
303 pdata->gpiod_ren[n] = NULL;
304 n++;
305 }
306
307 return pdata;
308}
309#else
310static struct da9211_pdata *da9211_parse_regulators_dt(
311 struct device *dev)
312{
313 return ERR_PTR(-ENODEV);
314}
315#endif
316
317static irqreturn_t da9211_irq_handler(int irq, void *data)
318{
319 struct da9211 *chip = data;
320 int reg_val, err, ret = IRQ_NONE;
321
322 err = regmap_read(chip->regmap, DA9211_REG_EVENT_B, ®_val);
323 if (err < 0)
324 goto error_i2c;
325
326 if (reg_val & DA9211_E_OV_CURR_A) {
327 regulator_notifier_call_chain(chip->rdev[0],
328 REGULATOR_EVENT_OVER_CURRENT, NULL);
329
330 err = regmap_write(chip->regmap, DA9211_REG_EVENT_B,
331 DA9211_E_OV_CURR_A);
332 if (err < 0)
333 goto error_i2c;
334
335 ret = IRQ_HANDLED;
336 }
337
338 if (reg_val & DA9211_E_OV_CURR_B) {
339 regulator_notifier_call_chain(chip->rdev[1],
340 REGULATOR_EVENT_OVER_CURRENT, NULL);
341
342 err = regmap_write(chip->regmap, DA9211_REG_EVENT_B,
343 DA9211_E_OV_CURR_B);
344 if (err < 0)
345 goto error_i2c;
346
347 ret = IRQ_HANDLED;
348 }
349
350 return ret;
351
352error_i2c:
353 dev_err(chip->dev, "I2C error : %d\n", err);
354 return IRQ_NONE;
355}
356
357static int da9211_regulator_init(struct da9211 *chip)
358{
359 struct regulator_config config = { };
360 int i, ret;
361 unsigned int data;
362
363 ret = regmap_read(chip->regmap, DA9211_REG_CONFIG_E, &data);
364 if (ret < 0) {
365 dev_err(chip->dev, "Failed to read CONFIG_E reg: %d\n", ret);
366 return ret;
367 }
368
369 data &= DA9211_SLAVE_SEL;
370
371
372
373 if (chip->pdata->num_buck == 1 && data == 0x00)
374 chip->num_regulator = 1;
375 else if (chip->pdata->num_buck == 2 && data != 0x00)
376 chip->num_regulator = 2;
377 else {
378 dev_err(chip->dev, "Configuration is mismatched\n");
379 return -EINVAL;
380 }
381
382 for (i = 0; i < chip->num_regulator; i++) {
383 config.init_data = chip->pdata->init_data[i];
384 config.dev = chip->dev;
385 config.driver_data = chip;
386 config.regmap = chip->regmap;
387 config.of_node = chip->pdata->reg_node[i];
388
389 if (chip->pdata->gpiod_ren[i])
390 config.ena_gpiod = chip->pdata->gpiod_ren[i];
391 else
392 config.ena_gpiod = NULL;
393
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
419static 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
496static 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};
507MODULE_DEVICE_TABLE(i2c, da9211_i2c_id);
508
509#ifdef CONFIG_OF
510static 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};
521MODULE_DEVICE_TABLE(of, da9211_dt_ids);
522#endif
523
524static 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
533module_i2c_driver(da9211_regulator_driver);
534
535MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
536MODULE_DESCRIPTION("DA9211/DA9212/DA9213/DA9223/DA9214/DA9224/DA9215/DA9225 regulator driver");
537MODULE_LICENSE("GPL");
538
