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16#include <linux/slab.h>
17#include <linux/device.h>
18#include <linux/module.h>
19#include <linux/err.h>
20#include <linux/platform_device.h>
21#include <linux/of.h>
22#include <linux/regmap.h>
23#include <linux/regulator/driver.h>
24#include <linux/regulator/machine.h>
25#include <linux/regulator/of_regulator.h>
26#include <linux/mfd/hi6421-pmic.h>
27
28
29
30
31
32struct hi6421_regulator_pdata {
33 struct mutex lock;
34};
35
36
37
38
39
40
41
42struct hi6421_regulator_info {
43 struct regulator_desc desc;
44 u8 mode_mask;
45 u32 eco_microamp;
46};
47
48
49enum hi6421_regulator_id {
50 HI6421_LDO0,
51 HI6421_LDO1,
52 HI6421_LDO2,
53 HI6421_LDO3,
54 HI6421_LDO4,
55 HI6421_LDO5,
56 HI6421_LDO6,
57 HI6421_LDO7,
58 HI6421_LDO8,
59 HI6421_LDO9,
60 HI6421_LDO10,
61 HI6421_LDO11,
62 HI6421_LDO12,
63 HI6421_LDO13,
64 HI6421_LDO14,
65 HI6421_LDO15,
66 HI6421_LDO16,
67 HI6421_LDO17,
68 HI6421_LDO18,
69 HI6421_LDO19,
70 HI6421_LDO20,
71 HI6421_LDOAUDIO,
72 HI6421_BUCK0,
73 HI6421_BUCK1,
74 HI6421_BUCK2,
75 HI6421_BUCK3,
76 HI6421_BUCK4,
77 HI6421_BUCK5,
78 HI6421_NUM_REGULATORS,
79};
80
81#define HI6421_REGULATOR_OF_MATCH(_name, id) \
82{ \
83 .name = #_name, \
84 .driver_data = (void *) HI6421_##id, \
85}
86
87static struct of_regulator_match hi6421_regulator_match[] = {
88 HI6421_REGULATOR_OF_MATCH(hi6421_vout0, LDO0),
89 HI6421_REGULATOR_OF_MATCH(hi6421_vout1, LDO1),
90 HI6421_REGULATOR_OF_MATCH(hi6421_vout2, LDO2),
91 HI6421_REGULATOR_OF_MATCH(hi6421_vout3, LDO3),
92 HI6421_REGULATOR_OF_MATCH(hi6421_vout4, LDO4),
93 HI6421_REGULATOR_OF_MATCH(hi6421_vout5, LDO5),
94 HI6421_REGULATOR_OF_MATCH(hi6421_vout6, LDO6),
95 HI6421_REGULATOR_OF_MATCH(hi6421_vout7, LDO7),
96 HI6421_REGULATOR_OF_MATCH(hi6421_vout8, LDO8),
97 HI6421_REGULATOR_OF_MATCH(hi6421_vout9, LDO9),
98 HI6421_REGULATOR_OF_MATCH(hi6421_vout10, LDO10),
99 HI6421_REGULATOR_OF_MATCH(hi6421_vout11, LDO11),
100 HI6421_REGULATOR_OF_MATCH(hi6421_vout12, LDO12),
101 HI6421_REGULATOR_OF_MATCH(hi6421_vout13, LDO13),
102 HI6421_REGULATOR_OF_MATCH(hi6421_vout14, LDO14),
103 HI6421_REGULATOR_OF_MATCH(hi6421_vout15, LDO15),
104 HI6421_REGULATOR_OF_MATCH(hi6421_vout16, LDO16),
105 HI6421_REGULATOR_OF_MATCH(hi6421_vout17, LDO17),
106 HI6421_REGULATOR_OF_MATCH(hi6421_vout18, LDO18),
107 HI6421_REGULATOR_OF_MATCH(hi6421_vout19, LDO19),
108 HI6421_REGULATOR_OF_MATCH(hi6421_vout20, LDO20),
109 HI6421_REGULATOR_OF_MATCH(hi6421_vout_audio, LDOAUDIO),
110 HI6421_REGULATOR_OF_MATCH(hi6421_buck0, BUCK0),
111 HI6421_REGULATOR_OF_MATCH(hi6421_buck1, BUCK1),
112 HI6421_REGULATOR_OF_MATCH(hi6421_buck2, BUCK2),
113 HI6421_REGULATOR_OF_MATCH(hi6421_buck3, BUCK3),
114 HI6421_REGULATOR_OF_MATCH(hi6421_buck4, BUCK4),
115 HI6421_REGULATOR_OF_MATCH(hi6421_buck5, BUCK5),
116};
117
118
119static const unsigned int ldo_0_voltages[] = {
120 1500000, 1800000, 2400000, 2500000,
121 2600000, 2700000, 2850000, 3000000,
122};
123
124
125static const unsigned int ldo_8_voltages[] = {
126 1500000, 1800000, 2400000, 2600000,
127 2700000, 2850000, 3000000, 3300000,
128};
129
130
131static const struct regulator_linear_range ldo_audio_volt_range[] = {
132 REGULATOR_LINEAR_RANGE(2800000, 0, 3, 50000),
133 REGULATOR_LINEAR_RANGE(3000000, 4, 7, 100000),
134};
135
136static const unsigned int buck_3_voltages[] = {
137 950000, 1050000, 1100000, 1117000,
138 1134000, 1150000, 1167000, 1200000,
139};
140
141static const unsigned int buck_4_voltages[] = {
142 1150000, 1200000, 1250000, 1350000,
143 1700000, 1800000, 1900000, 2000000,
144};
145
146static const unsigned int buck_5_voltages[] = {
147 1150000, 1200000, 1250000, 1350000,
148 1600000, 1700000, 1800000, 1900000,
149};
150
151static const struct regulator_ops hi6421_ldo_ops;
152static const struct regulator_ops hi6421_ldo_linear_ops;
153static const struct regulator_ops hi6421_ldo_linear_range_ops;
154static const struct regulator_ops hi6421_buck012_ops;
155static const struct regulator_ops hi6421_buck345_ops;
156
157#define HI6421_LDO_ENABLE_TIME (350)
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168
169#define HI6421_LDO(_id, v_table, vreg, vmask, ereg, emask, \
170 odelay, ecomask, ecoamp) \
171 [HI6421_##_id] = { \
172 .desc = { \
173 .name = #_id, \
174 .ops = &hi6421_ldo_ops, \
175 .type = REGULATOR_VOLTAGE, \
176 .id = HI6421_##_id, \
177 .owner = THIS_MODULE, \
178 .n_voltages = ARRAY_SIZE(v_table), \
179 .volt_table = v_table, \
180 .vsel_reg = HI6421_REG_TO_BUS_ADDR(vreg), \
181 .vsel_mask = vmask, \
182 .enable_reg = HI6421_REG_TO_BUS_ADDR(ereg), \
183 .enable_mask = emask, \
184 .enable_time = HI6421_LDO_ENABLE_TIME, \
185 .off_on_delay = odelay, \
186 }, \
187 .mode_mask = ecomask, \
188 .eco_microamp = ecoamp, \
189 }
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204
205#define HI6421_LDO_LINEAR(_id, _min_uV, n_volt, vstep, vreg, vmask, \
206 ereg, emask, odelay, ecomask, ecoamp) \
207 [HI6421_##_id] = { \
208 .desc = { \
209 .name = #_id, \
210 .ops = &hi6421_ldo_linear_ops, \
211 .type = REGULATOR_VOLTAGE, \
212 .id = HI6421_##_id, \
213 .owner = THIS_MODULE, \
214 .min_uV = _min_uV, \
215 .n_voltages = n_volt, \
216 .uV_step = vstep, \
217 .vsel_reg = HI6421_REG_TO_BUS_ADDR(vreg), \
218 .vsel_mask = vmask, \
219 .enable_reg = HI6421_REG_TO_BUS_ADDR(ereg), \
220 .enable_mask = emask, \
221 .enable_time = HI6421_LDO_ENABLE_TIME, \
222 .off_on_delay = odelay, \
223 }, \
224 .mode_mask = ecomask, \
225 .eco_microamp = ecoamp, \
226 }
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241
242#define HI6421_LDO_LINEAR_RANGE(_id, n_volt, volt_ranges, vreg, vmask, \
243 ereg, emask, odelay, ecomask, ecoamp) \
244 [HI6421_##_id] = { \
245 .desc = { \
246 .name = #_id, \
247 .ops = &hi6421_ldo_linear_range_ops, \
248 .type = REGULATOR_VOLTAGE, \
249 .id = HI6421_##_id, \
250 .owner = THIS_MODULE, \
251 .n_voltages = n_volt, \
252 .linear_ranges = volt_ranges, \
253 .n_linear_ranges = ARRAY_SIZE(volt_ranges), \
254 .vsel_reg = HI6421_REG_TO_BUS_ADDR(vreg), \
255 .vsel_mask = vmask, \
256 .enable_reg = HI6421_REG_TO_BUS_ADDR(ereg), \
257 .enable_mask = emask, \
258 .enable_time = HI6421_LDO_ENABLE_TIME, \
259 .off_on_delay = odelay, \
260 }, \
261 .mode_mask = ecomask, \
262 .eco_microamp = ecoamp, \
263 }
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275
276#define HI6421_BUCK012(_id, vreg, vmask, ereg, emask, sleepmask, \
277 etime, odelay) \
278 [HI6421_##_id] = { \
279 .desc = { \
280 .name = #_id, \
281 .ops = &hi6421_buck012_ops, \
282 .type = REGULATOR_VOLTAGE, \
283 .id = HI6421_##_id, \
284 .owner = THIS_MODULE, \
285 .min_uV = 700000, \
286 .n_voltages = 128, \
287 .uV_step = 7086, \
288 .vsel_reg = HI6421_REG_TO_BUS_ADDR(vreg), \
289 .vsel_mask = vmask, \
290 .enable_reg = HI6421_REG_TO_BUS_ADDR(ereg), \
291 .enable_mask = emask, \
292 .enable_time = etime, \
293 .off_on_delay = odelay, \
294 }, \
295 .mode_mask = sleepmask, \
296 }
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309
310#define HI6421_BUCK345(_id, v_table, vreg, vmask, ereg, emask, \
311 odelay, sleepmask) \
312 [HI6421_##_id] = { \
313 .desc = { \
314 .name = #_id, \
315 .ops = &hi6421_buck345_ops, \
316 .type = REGULATOR_VOLTAGE, \
317 .id = HI6421_##_id, \
318 .owner = THIS_MODULE, \
319 .n_voltages = ARRAY_SIZE(v_table), \
320 .volt_table = v_table, \
321 .vsel_reg = HI6421_REG_TO_BUS_ADDR(vreg), \
322 .vsel_mask = vmask, \
323 .enable_reg = HI6421_REG_TO_BUS_ADDR(ereg), \
324 .enable_mask = emask, \
325 .enable_time = HI6421_LDO_ENABLE_TIME, \
326 .off_on_delay = odelay, \
327 }, \
328 .mode_mask = sleepmask, \
329 }
330
331
332static struct hi6421_regulator_info
333 hi6421_regulator_info[HI6421_NUM_REGULATORS] = {
334 HI6421_LDO(LDO0, ldo_0_voltages, 0x20, 0x07, 0x20, 0x10,
335 10000, 0x20, 8000),
336 HI6421_LDO_LINEAR(LDO1, 1700000, 4, 100000, 0x21, 0x03, 0x21, 0x10,
337 10000, 0x20, 5000),
338 HI6421_LDO_LINEAR(LDO2, 1050000, 8, 50000, 0x22, 0x07, 0x22, 0x10,
339 20000, 0x20, 8000),
340 HI6421_LDO_LINEAR(LDO3, 1050000, 8, 50000, 0x23, 0x07, 0x23, 0x10,
341 20000, 0x20, 8000),
342 HI6421_LDO(LDO4, ldo_0_voltages, 0x24, 0x07, 0x24, 0x10,
343 20000, 0x20, 8000),
344 HI6421_LDO(LDO5, ldo_0_voltages, 0x25, 0x07, 0x25, 0x10,
345 20000, 0x20, 8000),
346 HI6421_LDO(LDO6, ldo_0_voltages, 0x26, 0x07, 0x26, 0x10,
347 20000, 0x20, 8000),
348 HI6421_LDO(LDO7, ldo_0_voltages, 0x27, 0x07, 0x27, 0x10,
349 20000, 0x20, 5000),
350 HI6421_LDO(LDO8, ldo_8_voltages, 0x28, 0x07, 0x28, 0x10,
351 20000, 0x20, 8000),
352 HI6421_LDO(LDO9, ldo_0_voltages, 0x29, 0x07, 0x29, 0x10,
353 40000, 0x20, 8000),
354 HI6421_LDO(LDO10, ldo_0_voltages, 0x2a, 0x07, 0x2a, 0x10,
355 40000, 0x20, 8000),
356 HI6421_LDO(LDO11, ldo_0_voltages, 0x2b, 0x07, 0x2b, 0x10,
357 40000, 0x20, 8000),
358 HI6421_LDO(LDO12, ldo_0_voltages, 0x2c, 0x07, 0x2c, 0x10,
359 40000, 0x20, 8000),
360 HI6421_LDO(LDO13, ldo_0_voltages, 0x2d, 0x07, 0x2d, 0x10,
361 40000, 0x20, 8000),
362 HI6421_LDO(LDO14, ldo_0_voltages, 0x2e, 0x07, 0x2e, 0x10,
363 40000, 0x20, 8000),
364 HI6421_LDO(LDO15, ldo_8_voltages, 0x2f, 0x07, 0x2f, 0x10,
365 40000, 0x20, 8000),
366 HI6421_LDO(LDO16, ldo_0_voltages, 0x30, 0x07, 0x30, 0x10,
367 40000, 0x20, 8000),
368 HI6421_LDO(LDO17, ldo_0_voltages, 0x31, 0x07, 0x31, 0x10,
369 40000, 0x20, 8000),
370 HI6421_LDO(LDO18, ldo_0_voltages, 0x32, 0x07, 0x32, 0x10,
371 40000, 0x20, 8000),
372 HI6421_LDO(LDO19, ldo_0_voltages, 0x33, 0x07, 0x33, 0x10,
373 40000, 0x20, 8000),
374 HI6421_LDO(LDO20, ldo_0_voltages, 0x34, 0x07, 0x34, 0x10,
375 40000, 0x20, 8000),
376 HI6421_LDO_LINEAR_RANGE(LDOAUDIO, 8, ldo_audio_volt_range, 0x36,
377 0x70, 0x36, 0x01, 40000, 0x02, 5000),
378 HI6421_BUCK012(BUCK0, 0x0d, 0x7f, 0x0c, 0x01, 0x10, 400, 20000),
379 HI6421_BUCK012(BUCK1, 0x0f, 0x7f, 0x0e, 0x01, 0x10, 400, 20000),
380 HI6421_BUCK012(BUCK2, 0x11, 0x7f, 0x10, 0x01, 0x10, 350, 100),
381 HI6421_BUCK345(BUCK3, buck_3_voltages, 0x13, 0x07, 0x12, 0x01,
382 20000, 0x10),
383 HI6421_BUCK345(BUCK4, buck_4_voltages, 0x15, 0x07, 0x14, 0x01,
384 20000, 0x10),
385 HI6421_BUCK345(BUCK5, buck_5_voltages, 0x17, 0x07, 0x16, 0x01,
386 20000, 0x10),
387};
388
389static int hi6421_regulator_enable(struct regulator_dev *rdev)
390{
391 struct hi6421_regulator_pdata *pdata;
392
393 pdata = dev_get_drvdata(rdev->dev.parent);
394
395
396
397
398
399 mutex_lock(&pdata->lock);
400
401
402 regulator_enable_regmap(rdev);
403
404 mutex_unlock(&pdata->lock);
405 return 0;
406}
407
408static unsigned int hi6421_regulator_ldo_get_mode(struct regulator_dev *rdev)
409{
410 struct hi6421_regulator_info *info = rdev_get_drvdata(rdev);
411 u32 reg_val;
412
413 regmap_read(rdev->regmap, rdev->desc->enable_reg, ®_val);
414 if (reg_val & info->mode_mask)
415 return REGULATOR_MODE_IDLE;
416
417 return REGULATOR_MODE_NORMAL;
418}
419
420static unsigned int hi6421_regulator_buck_get_mode(struct regulator_dev *rdev)
421{
422 struct hi6421_regulator_info *info = rdev_get_drvdata(rdev);
423 u32 reg_val;
424
425 regmap_read(rdev->regmap, rdev->desc->enable_reg, ®_val);
426 if (reg_val & info->mode_mask)
427 return REGULATOR_MODE_STANDBY;
428
429 return REGULATOR_MODE_NORMAL;
430}
431
432static int hi6421_regulator_ldo_set_mode(struct regulator_dev *rdev,
433 unsigned int mode)
434{
435 struct hi6421_regulator_info *info = rdev_get_drvdata(rdev);
436 u32 new_mode;
437
438 switch (mode) {
439 case REGULATOR_MODE_NORMAL:
440 new_mode = 0;
441 break;
442 case REGULATOR_MODE_IDLE:
443 new_mode = info->mode_mask;
444 break;
445 default:
446 return -EINVAL;
447 }
448
449
450 regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
451 info->mode_mask, new_mode);
452
453 return 0;
454}
455
456static int hi6421_regulator_buck_set_mode(struct regulator_dev *rdev,
457 unsigned int mode)
458{
459 struct hi6421_regulator_info *info = rdev_get_drvdata(rdev);
460 u32 new_mode;
461
462 switch (mode) {
463 case REGULATOR_MODE_NORMAL:
464 new_mode = 0;
465 break;
466 case REGULATOR_MODE_STANDBY:
467 new_mode = info->mode_mask;
468 break;
469 default:
470 return -EINVAL;
471 }
472
473
474 regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
475 info->mode_mask, new_mode);
476
477 return 0;
478}
479
480unsigned int hi6421_regulator_ldo_get_optimum_mode(struct regulator_dev *rdev,
481 int input_uV, int output_uV, int load_uA)
482{
483 struct hi6421_regulator_info *info = rdev_get_drvdata(rdev);
484
485 if (load_uA > info->eco_microamp)
486 return REGULATOR_MODE_NORMAL;
487
488 return REGULATOR_MODE_IDLE;
489}
490
491static const struct regulator_ops hi6421_ldo_ops = {
492 .is_enabled = regulator_is_enabled_regmap,
493 .enable = hi6421_regulator_enable,
494 .disable = regulator_disable_regmap,
495 .list_voltage = regulator_list_voltage_table,
496 .map_voltage = regulator_map_voltage_ascend,
497 .get_voltage_sel = regulator_get_voltage_sel_regmap,
498 .set_voltage_sel = regulator_set_voltage_sel_regmap,
499 .get_mode = hi6421_regulator_ldo_get_mode,
500 .set_mode = hi6421_regulator_ldo_set_mode,
501 .get_optimum_mode = hi6421_regulator_ldo_get_optimum_mode,
502};
503
504static const struct regulator_ops hi6421_ldo_linear_ops = {
505 .is_enabled = regulator_is_enabled_regmap,
506 .enable = hi6421_regulator_enable,
507 .disable = regulator_disable_regmap,
508 .list_voltage = regulator_list_voltage_linear,
509 .map_voltage = regulator_map_voltage_linear,
510 .get_voltage_sel = regulator_get_voltage_sel_regmap,
511 .set_voltage_sel = regulator_set_voltage_sel_regmap,
512 .get_mode = hi6421_regulator_ldo_get_mode,
513 .set_mode = hi6421_regulator_ldo_set_mode,
514 .get_optimum_mode = hi6421_regulator_ldo_get_optimum_mode,
515};
516
517static const struct regulator_ops hi6421_ldo_linear_range_ops = {
518 .is_enabled = regulator_is_enabled_regmap,
519 .enable = hi6421_regulator_enable,
520 .disable = regulator_disable_regmap,
521 .list_voltage = regulator_list_voltage_linear_range,
522 .map_voltage = regulator_map_voltage_linear_range,
523 .get_voltage_sel = regulator_get_voltage_sel_regmap,
524 .set_voltage_sel = regulator_set_voltage_sel_regmap,
525 .get_mode = hi6421_regulator_ldo_get_mode,
526 .set_mode = hi6421_regulator_ldo_set_mode,
527 .get_optimum_mode = hi6421_regulator_ldo_get_optimum_mode,
528};
529
530static const struct regulator_ops hi6421_buck012_ops = {
531 .is_enabled = regulator_is_enabled_regmap,
532 .enable = hi6421_regulator_enable,
533 .disable = regulator_disable_regmap,
534 .list_voltage = regulator_list_voltage_linear,
535 .map_voltage = regulator_map_voltage_linear,
536 .get_voltage_sel = regulator_get_voltage_sel_regmap,
537 .set_voltage_sel = regulator_set_voltage_sel_regmap,
538 .get_mode = hi6421_regulator_buck_get_mode,
539 .set_mode = hi6421_regulator_buck_set_mode,
540};
541
542static const struct regulator_ops hi6421_buck345_ops = {
543 .is_enabled = regulator_is_enabled_regmap,
544 .enable = hi6421_regulator_enable,
545 .disable = regulator_disable_regmap,
546 .list_voltage = regulator_list_voltage_table,
547 .map_voltage = regulator_map_voltage_ascend,
548 .get_voltage_sel = regulator_get_voltage_sel_regmap,
549 .set_voltage_sel = regulator_set_voltage_sel_regmap,
550 .get_mode = hi6421_regulator_buck_get_mode,
551 .set_mode = hi6421_regulator_buck_set_mode,
552};
553
554static int hi6421_regulator_register(struct platform_device *pdev,
555 struct regmap *rmap,
556 struct regulator_init_data *init_data,
557 int id, struct device_node *np)
558{
559 struct hi6421_regulator_info *info = NULL;
560 struct regulator_config config = { };
561 struct regulator_dev *rdev;
562
563
564 info = &hi6421_regulator_info[id];
565
566 config.dev = &pdev->dev;
567 config.init_data = init_data;
568 config.driver_data = info;
569 config.regmap = rmap;
570 config.of_node = np;
571
572
573 rdev = devm_regulator_register(&pdev->dev, &info->desc, &config);
574 if (IS_ERR(rdev)) {
575 dev_err(&pdev->dev, "failed to register regulator %s\n",
576 info->desc.name);
577 return PTR_ERR(rdev);
578 }
579
580 return 0;
581}
582
583static int hi6421_regulator_probe(struct platform_device *pdev)
584{
585 struct device *dev = &pdev->dev;
586 struct device_node *np;
587 struct hi6421_pmic *pmic;
588 struct hi6421_regulator_pdata *pdata;
589 int i, ret = 0;
590
591 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
592 if (!pdata)
593 return -ENOMEM;
594 mutex_init(&pdata->lock);
595 platform_set_drvdata(pdev, pdata);
596
597 np = of_get_child_by_name(dev->parent->of_node, "regulators");
598 if (!np)
599 return -ENODEV;
600
601 ret = of_regulator_match(dev, np,
602 hi6421_regulator_match,
603 ARRAY_SIZE(hi6421_regulator_match));
604 of_node_put(np);
605 if (ret < 0) {
606 dev_err(dev, "Error parsing regulator init data: %d\n", ret);
607 return ret;
608 }
609
610 pmic = dev_get_drvdata(dev->parent);
611
612 for (i = 0; i < ARRAY_SIZE(hi6421_regulator_info); i++) {
613 ret = hi6421_regulator_register(pdev, pmic->regmap,
614 hi6421_regulator_match[i].init_data, i,
615 hi6421_regulator_match[i].of_node);
616 if (ret)
617 return ret;
618 }
619
620 return 0;
621}
622
623static struct platform_driver hi6421_regulator_driver = {
624 .driver = {
625 .name = "hi6421-regulator",
626 },
627 .probe = hi6421_regulator_probe,
628};
629module_platform_driver(hi6421_regulator_driver);
630
631MODULE_AUTHOR("Guodong Xu <guodong.xu@linaro.org>");
632MODULE_DESCRIPTION("Hi6421 regulator driver");
633MODULE_LICENSE("GPL v2");
634
