1 /*
2 * Device driver for regulators in Hi6421 IC
3 *
4 * Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.
5 * http://www.hisilicon.com
6 * Copyright (c) <2013-2014> Linaro Ltd.
7 * http://www.linaro.org
8 *
9 * Author: Guodong Xu <guodong.xu@linaro.org>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
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 * struct hi6421_regulator_pdata - Hi6421 regulator data of platform device
30 * @lock: mutex to serialize regulator enable
31 */
32 struct hi6421_regulator_pdata {
33 struct mutex lock;
34 };
35
36 /*
37 * struct hi6421_regulator_info - hi6421 regulator information
38 * @desc: regulator description
39 * @mode_mask: ECO mode bitmask of LDOs; for BUCKs, this masks sleep
40 * @eco_microamp: eco mode load upper limit (in uA), valid for LDOs only
41 */
42 struct hi6421_regulator_info {
43 struct regulator_desc desc;
44 u8 mode_mask;
45 u32 eco_microamp;
46 };
47
48 /* HI6421 regulators */
49 enum 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
87 static 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 /* LDO 0, 4~7, 9~14, 16~20 have same voltage table. */
119 static const unsigned int ldo_0_voltages[] = {
120 1500000, 1800000, 2400000, 2500000,
121 2600000, 2700000, 2850000, 3000000,
122 };
123
124 /* LDO 8, 15 have same voltage table. */
125 static const unsigned int ldo_8_voltages[] = {
126 1500000, 1800000, 2400000, 2600000,
127 2700000, 2850000, 3000000, 3300000,
128 };
129
130 /* Ranges are sorted in ascending order. */
131 static 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
136 static const unsigned int buck_3_voltages[] = {
137 950000, 1050000, 1100000, 1117000,
138 1134000, 1150000, 1167000, 1200000,
139 };
140
141 static const unsigned int buck_4_voltages[] = {
142 1150000, 1200000, 1250000, 1350000,
143 1700000, 1800000, 1900000, 2000000,
144 };
145
146 static const unsigned int buck_5_voltages[] = {
147 1150000, 1200000, 1250000, 1350000,
148 1600000, 1700000, 1800000, 1900000,
149 };
150
151 static const struct regulator_ops hi6421_ldo_ops;
152 static const struct regulator_ops hi6421_ldo_linear_ops;
153 static const struct regulator_ops hi6421_ldo_linear_range_ops;
154 static const struct regulator_ops hi6421_buck012_ops;
155 static const struct regulator_ops hi6421_buck345_ops;
156
157 #define HI6421_LDO_ENABLE_TIME (350)
158 /*
159 * _id - LDO id name string
160 * v_table - voltage table
161 * vreg - voltage select register
162 * vmask - voltage select mask
163 * ereg - enable register
164 * emask - enable mask
165 * odelay - off/on delay time in uS
166 * ecomask - eco mode mask
167 * ecoamp - eco mode load uppler limit in uA
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 }
190
191 /* HI6421 LDO1~3 are linear voltage regulators at fixed uV_step
192 *
193 * _id - LDO id name string
194 * _min_uV - minimum voltage supported in uV
195 * n_volt - number of votages available
196 * vstep - voltage increase in each linear step in uV
197 * vreg - voltage select register
198 * vmask - voltage select mask
199 * ereg - enable register
200 * emask - enable mask
201 * odelay - off/on delay time in uS
202 * ecomask - eco mode mask
203 * ecoamp - eco mode load uppler limit in uA
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 }
227
228 /* HI6421 LDOAUDIO is a linear voltage regulator with two 4-step ranges
229 *
230 * _id - LDO id name string
231 * n_volt - number of votages available
232 * volt_ranges - array of regulator_linear_range
233 * vstep - voltage increase in each linear step in uV
234 * vreg - voltage select register
235 * vmask - voltage select mask
236 * ereg - enable register
237 * emask - enable mask
238 * odelay - off/on delay time in uS
239 * ecomask - eco mode mask
240 * ecoamp - eco mode load uppler limit in uA
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 }
264
265 /* HI6421 BUCK0/1/2 are linear voltage regulators at fixed uV_step
266 *
267 * _id - BUCK0/1/2 id name string
268 * vreg - voltage select register
269 * vmask - voltage select mask
270 * ereg - enable register
271 * emask - enable mask
272 * sleepmask - mask of sleep mode
273 * etime - enable time
274 * odelay - off/on delay time in uS
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 }
297
298 /* HI6421 BUCK3/4/5 share similar configurations as LDOs, with exception
299 * that it supports SLEEP mode, so has different .ops.
300 *
301 * _id - LDO id name string
302 * v_table - voltage table
303 * vreg - voltage select register
304 * vmask - voltage select mask
305 * ereg - enable register
306 * emask - enable mask
307 * odelay - off/on delay time in uS
308 * sleepmask - mask of sleep mode
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 /* HI6421 regulator information */
332 static 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
hi6421_regulator_enable(struct regulator_dev * rdev)389 static 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 /* hi6421 spec requires regulator enablement must be serialized:
395 * - Because when BUCK, LDO switching from off to on, it will have
396 * a huge instantaneous current; so you can not turn on two or
397 * more LDO or BUCKs simultaneously, or it may burn the chip.
398 */
399 mutex_lock(&pdata->lock);
400
401 /* call regulator regmap helper */
402 regulator_enable_regmap(rdev);
403
404 mutex_unlock(&pdata->lock);
405 return 0;
406 }
407
hi6421_regulator_ldo_get_mode(struct regulator_dev * rdev)408 static 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
hi6421_regulator_buck_get_mode(struct regulator_dev * rdev)420 static 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
hi6421_regulator_ldo_set_mode(struct regulator_dev * rdev,unsigned int mode)432 static 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 /* set mode */
450 regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
451 info->mode_mask, new_mode);
452
453 return 0;
454 }
455
hi6421_regulator_buck_set_mode(struct regulator_dev * rdev,unsigned int mode)456 static 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 /* set mode */
474 regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
475 info->mode_mask, new_mode);
476
477 return 0;
478 }
479
480 static unsigned int
hi6421_regulator_ldo_get_optimum_mode(struct regulator_dev * rdev,int input_uV,int output_uV,int load_uA)481 hi6421_regulator_ldo_get_optimum_mode(struct regulator_dev *rdev,
482 int input_uV, int output_uV, int load_uA)
483 {
484 struct hi6421_regulator_info *info = rdev_get_drvdata(rdev);
485
486 if (load_uA > info->eco_microamp)
487 return REGULATOR_MODE_NORMAL;
488
489 return REGULATOR_MODE_IDLE;
490 }
491
492 static const struct regulator_ops hi6421_ldo_ops = {
493 .is_enabled = regulator_is_enabled_regmap,
494 .enable = hi6421_regulator_enable,
495 .disable = regulator_disable_regmap,
496 .list_voltage = regulator_list_voltage_table,
497 .map_voltage = regulator_map_voltage_ascend,
498 .get_voltage_sel = regulator_get_voltage_sel_regmap,
499 .set_voltage_sel = regulator_set_voltage_sel_regmap,
500 .get_mode = hi6421_regulator_ldo_get_mode,
501 .set_mode = hi6421_regulator_ldo_set_mode,
502 .get_optimum_mode = hi6421_regulator_ldo_get_optimum_mode,
503 };
504
505 static const struct regulator_ops hi6421_ldo_linear_ops = {
506 .is_enabled = regulator_is_enabled_regmap,
507 .enable = hi6421_regulator_enable,
508 .disable = regulator_disable_regmap,
509 .list_voltage = regulator_list_voltage_linear,
510 .map_voltage = regulator_map_voltage_linear,
511 .get_voltage_sel = regulator_get_voltage_sel_regmap,
512 .set_voltage_sel = regulator_set_voltage_sel_regmap,
513 .get_mode = hi6421_regulator_ldo_get_mode,
514 .set_mode = hi6421_regulator_ldo_set_mode,
515 .get_optimum_mode = hi6421_regulator_ldo_get_optimum_mode,
516 };
517
518 static const struct regulator_ops hi6421_ldo_linear_range_ops = {
519 .is_enabled = regulator_is_enabled_regmap,
520 .enable = hi6421_regulator_enable,
521 .disable = regulator_disable_regmap,
522 .list_voltage = regulator_list_voltage_linear_range,
523 .map_voltage = regulator_map_voltage_linear_range,
524 .get_voltage_sel = regulator_get_voltage_sel_regmap,
525 .set_voltage_sel = regulator_set_voltage_sel_regmap,
526 .get_mode = hi6421_regulator_ldo_get_mode,
527 .set_mode = hi6421_regulator_ldo_set_mode,
528 .get_optimum_mode = hi6421_regulator_ldo_get_optimum_mode,
529 };
530
531 static const struct regulator_ops hi6421_buck012_ops = {
532 .is_enabled = regulator_is_enabled_regmap,
533 .enable = hi6421_regulator_enable,
534 .disable = regulator_disable_regmap,
535 .list_voltage = regulator_list_voltage_linear,
536 .map_voltage = regulator_map_voltage_linear,
537 .get_voltage_sel = regulator_get_voltage_sel_regmap,
538 .set_voltage_sel = regulator_set_voltage_sel_regmap,
539 .get_mode = hi6421_regulator_buck_get_mode,
540 .set_mode = hi6421_regulator_buck_set_mode,
541 };
542
543 static const struct regulator_ops hi6421_buck345_ops = {
544 .is_enabled = regulator_is_enabled_regmap,
545 .enable = hi6421_regulator_enable,
546 .disable = regulator_disable_regmap,
547 .list_voltage = regulator_list_voltage_table,
548 .map_voltage = regulator_map_voltage_ascend,
549 .get_voltage_sel = regulator_get_voltage_sel_regmap,
550 .set_voltage_sel = regulator_set_voltage_sel_regmap,
551 .get_mode = hi6421_regulator_buck_get_mode,
552 .set_mode = hi6421_regulator_buck_set_mode,
553 };
554
hi6421_regulator_register(struct platform_device * pdev,struct regmap * rmap,struct regulator_init_data * init_data,int id,struct device_node * np)555 static int hi6421_regulator_register(struct platform_device *pdev,
556 struct regmap *rmap,
557 struct regulator_init_data *init_data,
558 int id, struct device_node *np)
559 {
560 struct hi6421_regulator_info *info = NULL;
561 struct regulator_config config = { };
562 struct regulator_dev *rdev;
563
564 /* assign per-regulator data */
565 info = &hi6421_regulator_info[id];
566
567 config.dev = &pdev->dev;
568 config.init_data = init_data;
569 config.driver_data = info;
570 config.regmap = rmap;
571 config.of_node = np;
572
573 /* register regulator with framework */
574 rdev = devm_regulator_register(&pdev->dev, &info->desc, &config);
575 if (IS_ERR(rdev)) {
576 dev_err(&pdev->dev, "failed to register regulator %s\n",
577 info->desc.name);
578 return PTR_ERR(rdev);
579 }
580
581 return 0;
582 }
583
hi6421_regulator_probe(struct platform_device * pdev)584 static int hi6421_regulator_probe(struct platform_device *pdev)
585 {
586 struct device *dev = &pdev->dev;
587 struct device_node *np;
588 struct hi6421_pmic *pmic;
589 struct hi6421_regulator_pdata *pdata;
590 int i, ret = 0;
591
592 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
593 if (!pdata)
594 return -ENOMEM;
595 mutex_init(&pdata->lock);
596 platform_set_drvdata(pdev, pdata);
597
598 np = of_get_child_by_name(dev->parent->of_node, "regulators");
599 if (!np)
600 return -ENODEV;
601
602 ret = of_regulator_match(dev, np,
603 hi6421_regulator_match,
604 ARRAY_SIZE(hi6421_regulator_match));
605 of_node_put(np);
606 if (ret < 0) {
607 dev_err(dev, "Error parsing regulator init data: %d\n", ret);
608 return ret;
609 }
610
611 pmic = dev_get_drvdata(dev->parent);
612
613 for (i = 0; i < ARRAY_SIZE(hi6421_regulator_info); i++) {
614 ret = hi6421_regulator_register(pdev, pmic->regmap,
615 hi6421_regulator_match[i].init_data, i,
616 hi6421_regulator_match[i].of_node);
617 if (ret)
618 return ret;
619 }
620
621 return 0;
622 }
623
624 static const struct platform_device_id hi6421_regulator_table[] = {
625 { .name = "hi6421-regulator" },
626 {},
627 };
628 MODULE_DEVICE_TABLE(platform, hi6421_regulator_table);
629
630 static struct platform_driver hi6421_regulator_driver = {
631 .id_table = hi6421_regulator_table,
632 .driver = {
633 .name = "hi6421-regulator",
634 },
635 .probe = hi6421_regulator_probe,
636 };
637 module_platform_driver(hi6421_regulator_driver);
638
639 MODULE_AUTHOR("Guodong Xu <guodong.xu@linaro.org>");
640 MODULE_DESCRIPTION("Hi6421 regulator driver");
641 MODULE_LICENSE("GPL v2");
642