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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright 2012 Texas Instruments
4 *
5 * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
6 */
7
8#include <linux/module.h>
9#include <linux/slab.h>
10#include <linux/i2c.h>
11#include <linux/regmap.h>
12#include <linux/err.h>
13#include <linux/gpio.h>
14#include <linux/delay.h>
15#include <linux/regulator/lp872x.h>
16#include <linux/regulator/driver.h>
17#include <linux/platform_device.h>
18#include <linux/of.h>
19#include <linux/of_gpio.h>
20#include <linux/regulator/of_regulator.h>
21
22/* Registers : LP8720/8725 shared */
23#define LP872X_GENERAL_CFG 0x00
24#define LP872X_LDO1_VOUT 0x01
25#define LP872X_LDO2_VOUT 0x02
26#define LP872X_LDO3_VOUT 0x03
27#define LP872X_LDO4_VOUT 0x04
28#define LP872X_LDO5_VOUT 0x05
29
30/* Registers : LP8720 */
31#define LP8720_BUCK_VOUT1 0x06
32#define LP8720_BUCK_VOUT2 0x07
33#define LP8720_ENABLE 0x08
34
35/* Registers : LP8725 */
36#define LP8725_LILO1_VOUT 0x06
37#define LP8725_LILO2_VOUT 0x07
38#define LP8725_BUCK1_VOUT1 0x08
39#define LP8725_BUCK1_VOUT2 0x09
40#define LP8725_BUCK2_VOUT1 0x0A
41#define LP8725_BUCK2_VOUT2 0x0B
42#define LP8725_BUCK_CTRL 0x0C
43#define LP8725_LDO_CTRL 0x0D
44
45/* Mask/shift : LP8720/LP8725 shared */
46#define LP872X_VOUT_M 0x1F
47#define LP872X_START_DELAY_M 0xE0
48#define LP872X_START_DELAY_S 5
49#define LP872X_EN_LDO1_M BIT(0)
50#define LP872X_EN_LDO2_M BIT(1)
51#define LP872X_EN_LDO3_M BIT(2)
52#define LP872X_EN_LDO4_M BIT(3)
53#define LP872X_EN_LDO5_M BIT(4)
54
55/* Mask/shift : LP8720 */
56#define LP8720_TIMESTEP_S 0 /* Addr 00h */
57#define LP8720_TIMESTEP_M BIT(0)
58#define LP8720_EXT_DVS_M BIT(2)
59#define LP8720_BUCK_FPWM_S 5 /* Addr 07h */
60#define LP8720_BUCK_FPWM_M BIT(5)
61#define LP8720_EN_BUCK_M BIT(5) /* Addr 08h */
62#define LP8720_DVS_SEL_M BIT(7)
63
64/* Mask/shift : LP8725 */
65#define LP8725_TIMESTEP_M 0xC0 /* Addr 00h */
66#define LP8725_TIMESTEP_S 6
67#define LP8725_BUCK1_EN_M BIT(0)
68#define LP8725_DVS1_M BIT(2)
69#define LP8725_DVS2_M BIT(3)
70#define LP8725_BUCK2_EN_M BIT(4)
71#define LP8725_BUCK_CL_M 0xC0 /* Addr 09h, 0Bh */
72#define LP8725_BUCK_CL_S 6
73#define LP8725_BUCK1_FPWM_S 1 /* Addr 0Ch */
74#define LP8725_BUCK1_FPWM_M BIT(1)
75#define LP8725_BUCK2_FPWM_S 5
76#define LP8725_BUCK2_FPWM_M BIT(5)
77#define LP8725_EN_LILO1_M BIT(5) /* Addr 0Dh */
78#define LP8725_EN_LILO2_M BIT(6)
79
80/* PWM mode */
81#define LP872X_FORCE_PWM 1
82#define LP872X_AUTO_PWM 0
83
84#define LP8720_NUM_REGULATORS 6
85#define LP8725_NUM_REGULATORS 9
86#define EXTERN_DVS_USED 0
87#define MAX_DELAY 6
88
89/* Default DVS Mode */
90#define LP8720_DEFAULT_DVS 0
91#define LP8725_DEFAULT_DVS BIT(2)
92
93/* dump registers in regmap-debugfs */
94#define MAX_REGISTERS 0x0F
95
96enum lp872x_id {
97 LP8720,
98 LP8725,
99};
100
101struct lp872x {
102 struct regmap *regmap;
103 struct device *dev;
104 enum lp872x_id chipid;
105 struct lp872x_platform_data *pdata;
106 int num_regulators;
107 enum lp872x_dvs_state dvs_pin;
108};
109
110/* LP8720/LP8725 shared voltage table for LDOs */
111static const unsigned int lp872x_ldo_vtbl[] = {
112 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000,
113 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 2000000,
114 2100000, 2200000, 2300000, 2400000, 2500000, 2600000, 2650000, 2700000,
115 2750000, 2800000, 2850000, 2900000, 2950000, 3000000, 3100000, 3300000,
116};
117
118/* LP8720 LDO4 voltage table */
119static const unsigned int lp8720_ldo4_vtbl[] = {
120 800000, 850000, 900000, 1000000, 1100000, 1200000, 1250000, 1300000,
121 1350000, 1400000, 1450000, 1500000, 1550000, 1600000, 1650000, 1700000,
122 1750000, 1800000, 1850000, 1900000, 2000000, 2100000, 2200000, 2300000,
123 2400000, 2500000, 2600000, 2650000, 2700000, 2750000, 2800000, 2850000,
124};
125
126/* LP8725 LILO(Low Input Low Output) voltage table */
127static const unsigned int lp8725_lilo_vtbl[] = {
128 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000,
129 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1700000,
130 1800000, 1900000, 2000000, 2100000, 2200000, 2300000, 2400000, 2500000,
131 2600000, 2700000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000,
132};
133
134/* LP8720 BUCK voltage table */
135#define EXT_R 0 /* external resistor divider */
136static const unsigned int lp8720_buck_vtbl[] = {
137 EXT_R, 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000,
138 1150000, 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000,
139 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000,
140 1950000, 2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000,
141};
142
143/* LP8725 BUCK voltage table */
144static const unsigned int lp8725_buck_vtbl[] = {
145 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000,
146 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1700000,
147 1750000, 1800000, 1850000, 1900000, 2000000, 2100000, 2200000, 2300000,
148 2400000, 2500000, 2600000, 2700000, 2800000, 2850000, 2900000, 3000000,
149};
150
151/* LP8725 BUCK current limit */
152static const unsigned int lp8725_buck_uA[] = {
153 460000, 780000, 1050000, 1370000,
154};
155
156static int lp872x_read_byte(struct lp872x *lp, u8 addr, u8 *data)
157{
158 int ret;
159 unsigned int val;
160
161 ret = regmap_read(lp->regmap, addr, &val);
162 if (ret < 0) {
163 dev_err(lp->dev, "failed to read 0x%.2x\n", addr);
164 return ret;
165 }
166
167 *data = (u8)val;
168 return 0;
169}
170
171static inline int lp872x_write_byte(struct lp872x *lp, u8 addr, u8 data)
172{
173 return regmap_write(lp->regmap, addr, data);
174}
175
176static inline int lp872x_update_bits(struct lp872x *lp, u8 addr,
177 unsigned int mask, u8 data)
178{
179 return regmap_update_bits(lp->regmap, addr, mask, data);
180}
181
182static int lp872x_get_timestep_usec(struct lp872x *lp)
183{
184 enum lp872x_id chip = lp->chipid;
185 u8 val, mask, shift;
186 int *time_usec, size, ret;
187 int lp8720_time_usec[] = { 25, 50 };
188 int lp8725_time_usec[] = { 32, 64, 128, 256 };
189
190 switch (chip) {
191 case LP8720:
192 mask = LP8720_TIMESTEP_M;
193 shift = LP8720_TIMESTEP_S;
194 time_usec = &lp8720_time_usec[0];
195 size = ARRAY_SIZE(lp8720_time_usec);
196 break;
197 case LP8725:
198 mask = LP8725_TIMESTEP_M;
199 shift = LP8725_TIMESTEP_S;
200 time_usec = &lp8725_time_usec[0];
201 size = ARRAY_SIZE(lp8725_time_usec);
202 break;
203 default:
204 return -EINVAL;
205 }
206
207 ret = lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val);
208 if (ret)
209 return ret;
210
211 val = (val & mask) >> shift;
212 if (val >= size)
213 return -EINVAL;
214
215 return *(time_usec + val);
216}
217
218static int lp872x_regulator_enable_time(struct regulator_dev *rdev)
219{
220 struct lp872x *lp = rdev_get_drvdata(rdev);
221 enum lp872x_regulator_id rid = rdev_get_id(rdev);
222 int time_step_us = lp872x_get_timestep_usec(lp);
223 int ret;
224 u8 addr, val;
225
226 if (time_step_us < 0)
227 return time_step_us;
228
229 switch (rid) {
230 case LP8720_ID_LDO1 ... LP8720_ID_BUCK:
231 addr = LP872X_LDO1_VOUT + rid;
232 break;
233 case LP8725_ID_LDO1 ... LP8725_ID_BUCK1:
234 addr = LP872X_LDO1_VOUT + rid - LP8725_ID_BASE;
235 break;
236 case LP8725_ID_BUCK2:
237 addr = LP8725_BUCK2_VOUT1;
238 break;
239 default:
240 return -EINVAL;
241 }
242
243 ret = lp872x_read_byte(lp, addr, &val);
244 if (ret)
245 return ret;
246
247 val = (val & LP872X_START_DELAY_M) >> LP872X_START_DELAY_S;
248
249 return val > MAX_DELAY ? 0 : val * time_step_us;
250}
251
252static void lp872x_set_dvs(struct lp872x *lp, enum lp872x_dvs_sel dvs_sel,
253 int gpio)
254{
255 enum lp872x_dvs_state state;
256
257 state = dvs_sel == SEL_V1 ? DVS_HIGH : DVS_LOW;
258 gpio_set_value(gpio, state);
259 lp->dvs_pin = state;
260}
261
262static u8 lp872x_select_buck_vout_addr(struct lp872x *lp,
263 enum lp872x_regulator_id buck)
264{
265 u8 val, addr;
266
267 if (lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val))
268 return 0;
269
270 switch (buck) {
271 case LP8720_ID_BUCK:
272 if (val & LP8720_EXT_DVS_M) {
273 addr = (lp->dvs_pin == DVS_HIGH) ?
274 LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2;
275 } else {
276 if (lp872x_read_byte(lp, LP8720_ENABLE, &val))
277 return 0;
278
279 addr = val & LP8720_DVS_SEL_M ?
280 LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2;
281 }
282 break;
283 case LP8725_ID_BUCK1:
284 if (val & LP8725_DVS1_M)
285 addr = LP8725_BUCK1_VOUT1;
286 else
287 addr = (lp->dvs_pin == DVS_HIGH) ?
288 LP8725_BUCK1_VOUT1 : LP8725_BUCK1_VOUT2;
289 break;
290 case LP8725_ID_BUCK2:
291 addr = val & LP8725_DVS2_M ?
292 LP8725_BUCK2_VOUT1 : LP8725_BUCK2_VOUT2;
293 break;
294 default:
295 return 0;
296 }
297
298 return addr;
299}
300
301static bool lp872x_is_valid_buck_addr(u8 addr)
302{
303 switch (addr) {
304 case LP8720_BUCK_VOUT1:
305 case LP8720_BUCK_VOUT2:
306 case LP8725_BUCK1_VOUT1:
307 case LP8725_BUCK1_VOUT2:
308 case LP8725_BUCK2_VOUT1:
309 case LP8725_BUCK2_VOUT2:
310 return true;
311 default:
312 return false;
313 }
314}
315
316static int lp872x_buck_set_voltage_sel(struct regulator_dev *rdev,
317 unsigned selector)
318{
319 struct lp872x *lp = rdev_get_drvdata(rdev);
320 enum lp872x_regulator_id buck = rdev_get_id(rdev);
321 u8 addr, mask = LP872X_VOUT_M;
322 struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL;
323
324 if (dvs && gpio_is_valid(dvs->gpio))
325 lp872x_set_dvs(lp, dvs->vsel, dvs->gpio);
326
327 addr = lp872x_select_buck_vout_addr(lp, buck);
328 if (!lp872x_is_valid_buck_addr(addr))
329 return -EINVAL;
330
331 return lp872x_update_bits(lp, addr, mask, selector);
332}
333
334static int lp872x_buck_get_voltage_sel(struct regulator_dev *rdev)
335{
336 struct lp872x *lp = rdev_get_drvdata(rdev);
337 enum lp872x_regulator_id buck = rdev_get_id(rdev);
338 u8 addr, val;
339 int ret;
340
341 addr = lp872x_select_buck_vout_addr(lp, buck);
342 if (!lp872x_is_valid_buck_addr(addr))
343 return -EINVAL;
344
345 ret = lp872x_read_byte(lp, addr, &val);
346 if (ret)
347 return ret;
348
349 return val & LP872X_VOUT_M;
350}
351
352static int lp872x_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
353{
354 struct lp872x *lp = rdev_get_drvdata(rdev);
355 enum lp872x_regulator_id buck = rdev_get_id(rdev);
356 u8 addr, mask, shift, val;
357
358 switch (buck) {
359 case LP8720_ID_BUCK:
360 addr = LP8720_BUCK_VOUT2;
361 mask = LP8720_BUCK_FPWM_M;
362 shift = LP8720_BUCK_FPWM_S;
363 break;
364 case LP8725_ID_BUCK1:
365 addr = LP8725_BUCK_CTRL;
366 mask = LP8725_BUCK1_FPWM_M;
367 shift = LP8725_BUCK1_FPWM_S;
368 break;
369 case LP8725_ID_BUCK2:
370 addr = LP8725_BUCK_CTRL;
371 mask = LP8725_BUCK2_FPWM_M;
372 shift = LP8725_BUCK2_FPWM_S;
373 break;
374 default:
375 return -EINVAL;
376 }
377
378 if (mode == REGULATOR_MODE_FAST)
379 val = LP872X_FORCE_PWM << shift;
380 else if (mode == REGULATOR_MODE_NORMAL)
381 val = LP872X_AUTO_PWM << shift;
382 else
383 return -EINVAL;
384
385 return lp872x_update_bits(lp, addr, mask, val);
386}
387
388static unsigned int lp872x_buck_get_mode(struct regulator_dev *rdev)
389{
390 struct lp872x *lp = rdev_get_drvdata(rdev);
391 enum lp872x_regulator_id buck = rdev_get_id(rdev);
392 u8 addr, mask, val;
393 int ret;
394
395 switch (buck) {
396 case LP8720_ID_BUCK:
397 addr = LP8720_BUCK_VOUT2;
398 mask = LP8720_BUCK_FPWM_M;
399 break;
400 case LP8725_ID_BUCK1:
401 addr = LP8725_BUCK_CTRL;
402 mask = LP8725_BUCK1_FPWM_M;
403 break;
404 case LP8725_ID_BUCK2:
405 addr = LP8725_BUCK_CTRL;
406 mask = LP8725_BUCK2_FPWM_M;
407 break;
408 default:
409 return -EINVAL;
410 }
411
412 ret = lp872x_read_byte(lp, addr, &val);
413 if (ret)
414 return ret;
415
416 return val & mask ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL;
417}
418
419static const struct regulator_ops lp872x_ldo_ops = {
420 .list_voltage = regulator_list_voltage_table,
421 .map_voltage = regulator_map_voltage_ascend,
422 .set_voltage_sel = regulator_set_voltage_sel_regmap,
423 .get_voltage_sel = regulator_get_voltage_sel_regmap,
424 .enable = regulator_enable_regmap,
425 .disable = regulator_disable_regmap,
426 .is_enabled = regulator_is_enabled_regmap,
427 .enable_time = lp872x_regulator_enable_time,
428};
429
430static const struct regulator_ops lp8720_buck_ops = {
431 .list_voltage = regulator_list_voltage_table,
432 .map_voltage = regulator_map_voltage_ascend,
433 .set_voltage_sel = lp872x_buck_set_voltage_sel,
434 .get_voltage_sel = lp872x_buck_get_voltage_sel,
435 .enable = regulator_enable_regmap,
436 .disable = regulator_disable_regmap,
437 .is_enabled = regulator_is_enabled_regmap,
438 .enable_time = lp872x_regulator_enable_time,
439 .set_mode = lp872x_buck_set_mode,
440 .get_mode = lp872x_buck_get_mode,
441};
442
443static const struct regulator_ops lp8725_buck_ops = {
444 .list_voltage = regulator_list_voltage_table,
445 .map_voltage = regulator_map_voltage_ascend,
446 .set_voltage_sel = lp872x_buck_set_voltage_sel,
447 .get_voltage_sel = lp872x_buck_get_voltage_sel,
448 .enable = regulator_enable_regmap,
449 .disable = regulator_disable_regmap,
450 .is_enabled = regulator_is_enabled_regmap,
451 .enable_time = lp872x_regulator_enable_time,
452 .set_mode = lp872x_buck_set_mode,
453 .get_mode = lp872x_buck_get_mode,
454 .set_current_limit = regulator_set_current_limit_regmap,
455 .get_current_limit = regulator_get_current_limit_regmap,
456};
457
458static const struct regulator_desc lp8720_regulator_desc[] = {
459 {
460 .name = "ldo1",
461 .of_match = of_match_ptr("ldo1"),
462 .id = LP8720_ID_LDO1,
463 .ops = &lp872x_ldo_ops,
464 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl),
465 .volt_table = lp872x_ldo_vtbl,
466 .type = REGULATOR_VOLTAGE,
467 .owner = THIS_MODULE,
468 .vsel_reg = LP872X_LDO1_VOUT,
469 .vsel_mask = LP872X_VOUT_M,
470 .enable_reg = LP8720_ENABLE,
471 .enable_mask = LP872X_EN_LDO1_M,
472 },
473 {
474 .name = "ldo2",
475 .of_match = of_match_ptr("ldo2"),
476 .id = LP8720_ID_LDO2,
477 .ops = &lp872x_ldo_ops,
478 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl),
479 .volt_table = lp872x_ldo_vtbl,
480 .type = REGULATOR_VOLTAGE,
481 .owner = THIS_MODULE,
482 .vsel_reg = LP872X_LDO2_VOUT,
483 .vsel_mask = LP872X_VOUT_M,
484 .enable_reg = LP8720_ENABLE,
485 .enable_mask = LP872X_EN_LDO2_M,
486 },
487 {
488 .name = "ldo3",
489 .of_match = of_match_ptr("ldo3"),
490 .id = LP8720_ID_LDO3,
491 .ops = &lp872x_ldo_ops,
492 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl),
493 .volt_table = lp872x_ldo_vtbl,
494 .type = REGULATOR_VOLTAGE,
495 .owner = THIS_MODULE,
496 .vsel_reg = LP872X_LDO3_VOUT,
497 .vsel_mask = LP872X_VOUT_M,
498 .enable_reg = LP8720_ENABLE,
499 .enable_mask = LP872X_EN_LDO3_M,
500 },
501 {
502 .name = "ldo4",
503 .of_match = of_match_ptr("ldo4"),
504 .id = LP8720_ID_LDO4,
505 .ops = &lp872x_ldo_ops,
506 .n_voltages = ARRAY_SIZE(lp8720_ldo4_vtbl),
507 .volt_table = lp8720_ldo4_vtbl,
508 .type = REGULATOR_VOLTAGE,
509 .owner = THIS_MODULE,
510 .vsel_reg = LP872X_LDO4_VOUT,
511 .vsel_mask = LP872X_VOUT_M,
512 .enable_reg = LP8720_ENABLE,
513 .enable_mask = LP872X_EN_LDO4_M,
514 },
515 {
516 .name = "ldo5",
517 .of_match = of_match_ptr("ldo5"),
518 .id = LP8720_ID_LDO5,
519 .ops = &lp872x_ldo_ops,
520 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl),
521 .volt_table = lp872x_ldo_vtbl,
522 .type = REGULATOR_VOLTAGE,
523 .owner = THIS_MODULE,
524 .vsel_reg = LP872X_LDO5_VOUT,
525 .vsel_mask = LP872X_VOUT_M,
526 .enable_reg = LP8720_ENABLE,
527 .enable_mask = LP872X_EN_LDO5_M,
528 },
529 {
530 .name = "buck",
531 .of_match = of_match_ptr("buck"),
532 .id = LP8720_ID_BUCK,
533 .ops = &lp8720_buck_ops,
534 .n_voltages = ARRAY_SIZE(lp8720_buck_vtbl),
535 .volt_table = lp8720_buck_vtbl,
536 .type = REGULATOR_VOLTAGE,
537 .owner = THIS_MODULE,
538 .enable_reg = LP8720_ENABLE,
539 .enable_mask = LP8720_EN_BUCK_M,
540 },
541};
542
543static const struct regulator_desc lp8725_regulator_desc[] = {
544 {
545 .name = "ldo1",
546 .of_match = of_match_ptr("ldo1"),
547 .id = LP8725_ID_LDO1,
548 .ops = &lp872x_ldo_ops,
549 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl),
550 .volt_table = lp872x_ldo_vtbl,
551 .type = REGULATOR_VOLTAGE,
552 .owner = THIS_MODULE,
553 .vsel_reg = LP872X_LDO1_VOUT,
554 .vsel_mask = LP872X_VOUT_M,
555 .enable_reg = LP8725_LDO_CTRL,
556 .enable_mask = LP872X_EN_LDO1_M,
557 },
558 {
559 .name = "ldo2",
560 .of_match = of_match_ptr("ldo2"),
561 .id = LP8725_ID_LDO2,
562 .ops = &lp872x_ldo_ops,
563 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl),
564 .volt_table = lp872x_ldo_vtbl,
565 .type = REGULATOR_VOLTAGE,
566 .owner = THIS_MODULE,
567 .vsel_reg = LP872X_LDO2_VOUT,
568 .vsel_mask = LP872X_VOUT_M,
569 .enable_reg = LP8725_LDO_CTRL,
570 .enable_mask = LP872X_EN_LDO2_M,
571 },
572 {
573 .name = "ldo3",
574 .of_match = of_match_ptr("ldo3"),
575 .id = LP8725_ID_LDO3,
576 .ops = &lp872x_ldo_ops,
577 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl),
578 .volt_table = lp872x_ldo_vtbl,
579 .type = REGULATOR_VOLTAGE,
580 .owner = THIS_MODULE,
581 .vsel_reg = LP872X_LDO3_VOUT,
582 .vsel_mask = LP872X_VOUT_M,
583 .enable_reg = LP8725_LDO_CTRL,
584 .enable_mask = LP872X_EN_LDO3_M,
585 },
586 {
587 .name = "ldo4",
588 .of_match = of_match_ptr("ldo4"),
589 .id = LP8725_ID_LDO4,
590 .ops = &lp872x_ldo_ops,
591 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl),
592 .volt_table = lp872x_ldo_vtbl,
593 .type = REGULATOR_VOLTAGE,
594 .owner = THIS_MODULE,
595 .vsel_reg = LP872X_LDO4_VOUT,
596 .vsel_mask = LP872X_VOUT_M,
597 .enable_reg = LP8725_LDO_CTRL,
598 .enable_mask = LP872X_EN_LDO4_M,
599 },
600 {
601 .name = "ldo5",
602 .of_match = of_match_ptr("ldo5"),
603 .id = LP8725_ID_LDO5,
604 .ops = &lp872x_ldo_ops,
605 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl),
606 .volt_table = lp872x_ldo_vtbl,
607 .type = REGULATOR_VOLTAGE,
608 .owner = THIS_MODULE,
609 .vsel_reg = LP872X_LDO5_VOUT,
610 .vsel_mask = LP872X_VOUT_M,
611 .enable_reg = LP8725_LDO_CTRL,
612 .enable_mask = LP872X_EN_LDO5_M,
613 },
614 {
615 .name = "lilo1",
616 .of_match = of_match_ptr("lilo1"),
617 .id = LP8725_ID_LILO1,
618 .ops = &lp872x_ldo_ops,
619 .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl),
620 .volt_table = lp8725_lilo_vtbl,
621 .type = REGULATOR_VOLTAGE,
622 .owner = THIS_MODULE,
623 .vsel_reg = LP8725_LILO1_VOUT,
624 .vsel_mask = LP872X_VOUT_M,
625 .enable_reg = LP8725_LDO_CTRL,
626 .enable_mask = LP8725_EN_LILO1_M,
627 },
628 {
629 .name = "lilo2",
630 .of_match = of_match_ptr("lilo2"),
631 .id = LP8725_ID_LILO2,
632 .ops = &lp872x_ldo_ops,
633 .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl),
634 .volt_table = lp8725_lilo_vtbl,
635 .type = REGULATOR_VOLTAGE,
636 .owner = THIS_MODULE,
637 .vsel_reg = LP8725_LILO2_VOUT,
638 .vsel_mask = LP872X_VOUT_M,
639 .enable_reg = LP8725_LDO_CTRL,
640 .enable_mask = LP8725_EN_LILO2_M,
641 },
642 {
643 .name = "buck1",
644 .of_match = of_match_ptr("buck1"),
645 .id = LP8725_ID_BUCK1,
646 .ops = &lp8725_buck_ops,
647 .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl),
648 .volt_table = lp8725_buck_vtbl,
649 .type = REGULATOR_VOLTAGE,
650 .owner = THIS_MODULE,
651 .enable_reg = LP872X_GENERAL_CFG,
652 .enable_mask = LP8725_BUCK1_EN_M,
653 .curr_table = lp8725_buck_uA,
654 .n_current_limits = ARRAY_SIZE(lp8725_buck_uA),
655 .csel_reg = LP8725_BUCK1_VOUT2,
656 .csel_mask = LP8725_BUCK_CL_M,
657 },
658 {
659 .name = "buck2",
660 .of_match = of_match_ptr("buck2"),
661 .id = LP8725_ID_BUCK2,
662 .ops = &lp8725_buck_ops,
663 .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl),
664 .volt_table = lp8725_buck_vtbl,
665 .type = REGULATOR_VOLTAGE,
666 .owner = THIS_MODULE,
667 .enable_reg = LP872X_GENERAL_CFG,
668 .enable_mask = LP8725_BUCK2_EN_M,
669 .curr_table = lp8725_buck_uA,
670 .n_current_limits = ARRAY_SIZE(lp8725_buck_uA),
671 .csel_reg = LP8725_BUCK2_VOUT2,
672 .csel_mask = LP8725_BUCK_CL_M,
673 },
674};
675
676static int lp872x_init_dvs(struct lp872x *lp)
677{
678 int ret, gpio;
679 struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL;
680 enum lp872x_dvs_state pinstate;
681 u8 mask[] = { LP8720_EXT_DVS_M, LP8725_DVS1_M | LP8725_DVS2_M };
682 u8 default_dvs_mode[] = { LP8720_DEFAULT_DVS, LP8725_DEFAULT_DVS };
683
684 if (!dvs)
685 goto set_default_dvs_mode;
686
687 gpio = dvs->gpio;
688 if (!gpio_is_valid(gpio))
689 goto set_default_dvs_mode;
690
691 pinstate = dvs->init_state;
692 ret = devm_gpio_request_one(lp->dev, gpio, pinstate, "LP872X DVS");
693 if (ret) {
694 dev_err(lp->dev, "gpio request err: %d\n", ret);
695 return ret;
696 }
697
698 lp->dvs_pin = pinstate;
699
700 return 0;
701
702set_default_dvs_mode:
703 return lp872x_update_bits(lp, LP872X_GENERAL_CFG, mask[lp->chipid],
704 default_dvs_mode[lp->chipid]);
705}
706
707static int lp872x_hw_enable(struct lp872x *lp)
708{
709 int ret, gpio;
710
711 if (!lp->pdata)
712 return -EINVAL;
713
714 gpio = lp->pdata->enable_gpio;
715 if (!gpio_is_valid(gpio))
716 return 0;
717
718 /* Always set enable GPIO high. */
719 ret = devm_gpio_request_one(lp->dev, gpio, GPIOF_OUT_INIT_HIGH, "LP872X EN");
720 if (ret) {
721 dev_err(lp->dev, "gpio request err: %d\n", ret);
722 return ret;
723 }
724
725 /* Each chip has a different enable delay. */
726 if (lp->chipid == LP8720)
727 usleep_range(LP8720_ENABLE_DELAY, 1.5 * LP8720_ENABLE_DELAY);
728 else
729 usleep_range(LP8725_ENABLE_DELAY, 1.5 * LP8725_ENABLE_DELAY);
730
731 return 0;
732}
733
734static int lp872x_config(struct lp872x *lp)
735{
736 struct lp872x_platform_data *pdata = lp->pdata;
737 int ret;
738
739 if (!pdata || !pdata->update_config)
740 goto init_dvs;
741
742 ret = lp872x_write_byte(lp, LP872X_GENERAL_CFG, pdata->general_config);
743 if (ret)
744 return ret;
745
746init_dvs:
747 return lp872x_init_dvs(lp);
748}
749
750static struct regulator_init_data
751*lp872x_find_regulator_init_data(int id, struct lp872x *lp)
752{
753 struct lp872x_platform_data *pdata = lp->pdata;
754 int i;
755
756 if (!pdata)
757 return NULL;
758
759 for (i = 0; i < lp->num_regulators; i++) {
760 if (pdata->regulator_data[i].id == id)
761 return pdata->regulator_data[i].init_data;
762 }
763
764 return NULL;
765}
766
767static int lp872x_regulator_register(struct lp872x *lp)
768{
769 const struct regulator_desc *desc;
770 struct regulator_config cfg = { };
771 struct regulator_dev *rdev;
772 int i;
773
774 for (i = 0; i < lp->num_regulators; i++) {
775 desc = (lp->chipid == LP8720) ? &lp8720_regulator_desc[i] :
776 &lp8725_regulator_desc[i];
777
778 cfg.dev = lp->dev;
779 cfg.init_data = lp872x_find_regulator_init_data(desc->id, lp);
780 cfg.driver_data = lp;
781 cfg.regmap = lp->regmap;
782
783 rdev = devm_regulator_register(lp->dev, desc, &cfg);
784 if (IS_ERR(rdev)) {
785 dev_err(lp->dev, "regulator register err");
786 return PTR_ERR(rdev);
787 }
788 }
789
790 return 0;
791}
792
793static const struct regmap_config lp872x_regmap_config = {
794 .reg_bits = 8,
795 .val_bits = 8,
796 .max_register = MAX_REGISTERS,
797};
798
799#ifdef CONFIG_OF
800
801#define LP872X_VALID_OPMODE (REGULATOR_MODE_FAST | REGULATOR_MODE_NORMAL)
802
803static struct of_regulator_match lp8720_matches[] = {
804 { .name = "ldo1", .driver_data = (void *)LP8720_ID_LDO1, },
805 { .name = "ldo2", .driver_data = (void *)LP8720_ID_LDO2, },
806 { .name = "ldo3", .driver_data = (void *)LP8720_ID_LDO3, },
807 { .name = "ldo4", .driver_data = (void *)LP8720_ID_LDO4, },
808 { .name = "ldo5", .driver_data = (void *)LP8720_ID_LDO5, },
809 { .name = "buck", .driver_data = (void *)LP8720_ID_BUCK, },
810};
811
812static struct of_regulator_match lp8725_matches[] = {
813 { .name = "ldo1", .driver_data = (void *)LP8725_ID_LDO1, },
814 { .name = "ldo2", .driver_data = (void *)LP8725_ID_LDO2, },
815 { .name = "ldo3", .driver_data = (void *)LP8725_ID_LDO3, },
816 { .name = "ldo4", .driver_data = (void *)LP8725_ID_LDO4, },
817 { .name = "ldo5", .driver_data = (void *)LP8725_ID_LDO5, },
818 { .name = "lilo1", .driver_data = (void *)LP8725_ID_LILO1, },
819 { .name = "lilo2", .driver_data = (void *)LP8725_ID_LILO2, },
820 { .name = "buck1", .driver_data = (void *)LP8725_ID_BUCK1, },
821 { .name = "buck2", .driver_data = (void *)LP8725_ID_BUCK2, },
822};
823
824static struct lp872x_platform_data
825*lp872x_populate_pdata_from_dt(struct device *dev, enum lp872x_id which)
826{
827 struct device_node *np = dev->of_node;
828 struct lp872x_platform_data *pdata;
829 struct of_regulator_match *match;
830 int num_matches;
831 int count;
832 int i;
833 u8 dvs_state;
834
835 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
836 if (!pdata)
837 return ERR_PTR(-ENOMEM);
838
839 of_property_read_u8(np, "ti,general-config", &pdata->general_config);
840 if (of_find_property(np, "ti,update-config", NULL))
841 pdata->update_config = true;
842
843 pdata->dvs = devm_kzalloc(dev, sizeof(struct lp872x_dvs), GFP_KERNEL);
844 if (!pdata->dvs)
845 return ERR_PTR(-ENOMEM);
846
847 pdata->dvs->gpio = of_get_named_gpio(np, "ti,dvs-gpio", 0);
848 of_property_read_u8(np, "ti,dvs-vsel", (u8 *)&pdata->dvs->vsel);
849 of_property_read_u8(np, "ti,dvs-state", &dvs_state);
850 pdata->dvs->init_state = dvs_state ? DVS_HIGH : DVS_LOW;
851
852 pdata->enable_gpio = of_get_named_gpio(np, "enable-gpios", 0);
853
854 if (of_get_child_count(np) == 0)
855 goto out;
856
857 switch (which) {
858 case LP8720:
859 match = lp8720_matches;
860 num_matches = ARRAY_SIZE(lp8720_matches);
861 break;
862 case LP8725:
863 match = lp8725_matches;
864 num_matches = ARRAY_SIZE(lp8725_matches);
865 break;
866 default:
867 goto out;
868 }
869
870 count = of_regulator_match(dev, np, match, num_matches);
871 if (count <= 0)
872 goto out;
873
874 for (i = 0; i < num_matches; i++) {
875 pdata->regulator_data[i].id =
876 (enum lp872x_regulator_id)match[i].driver_data;
877 pdata->regulator_data[i].init_data = match[i].init_data;
878 }
879out:
880 return pdata;
881}
882#else
883static struct lp872x_platform_data
884*lp872x_populate_pdata_from_dt(struct device *dev, enum lp872x_id which)
885{
886 return NULL;
887}
888#endif
889
890static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id)
891{
892 struct lp872x *lp;
893 struct lp872x_platform_data *pdata;
894 int ret;
895 const int lp872x_num_regulators[] = {
896 [LP8720] = LP8720_NUM_REGULATORS,
897 [LP8725] = LP8725_NUM_REGULATORS,
898 };
899
900 if (cl->dev.of_node) {
901 pdata = lp872x_populate_pdata_from_dt(&cl->dev,
902 (enum lp872x_id)id->driver_data);
903 if (IS_ERR(pdata))
904 return PTR_ERR(pdata);
905 } else {
906 pdata = dev_get_platdata(&cl->dev);
907 }
908
909 lp = devm_kzalloc(&cl->dev, sizeof(struct lp872x), GFP_KERNEL);
910 if (!lp)
911 return -ENOMEM;
912
913 lp->num_regulators = lp872x_num_regulators[id->driver_data];
914
915 lp->regmap = devm_regmap_init_i2c(cl, &lp872x_regmap_config);
916 if (IS_ERR(lp->regmap)) {
917 ret = PTR_ERR(lp->regmap);
918 dev_err(&cl->dev, "regmap init i2c err: %d\n", ret);
919 return ret;
920 }
921
922 lp->dev = &cl->dev;
923 lp->pdata = pdata;
924 lp->chipid = id->driver_data;
925 i2c_set_clientdata(cl, lp);
926
927 ret = lp872x_hw_enable(lp);
928 if (ret)
929 return ret;
930
931 ret = lp872x_config(lp);
932 if (ret)
933 return ret;
934
935 return lp872x_regulator_register(lp);
936}
937
938static const struct of_device_id lp872x_dt_ids[] = {
939 { .compatible = "ti,lp8720", },
940 { .compatible = "ti,lp8725", },
941 { }
942};
943MODULE_DEVICE_TABLE(of, lp872x_dt_ids);
944
945static const struct i2c_device_id lp872x_ids[] = {
946 {"lp8720", LP8720},
947 {"lp8725", LP8725},
948 { }
949};
950MODULE_DEVICE_TABLE(i2c, lp872x_ids);
951
952static struct i2c_driver lp872x_driver = {
953 .driver = {
954 .name = "lp872x",
955 .of_match_table = of_match_ptr(lp872x_dt_ids),
956 },
957 .probe = lp872x_probe,
958 .id_table = lp872x_ids,
959};
960
961module_i2c_driver(lp872x_driver);
962
963MODULE_DESCRIPTION("TI/National Semiconductor LP872x PMU Regulator Driver");
964MODULE_AUTHOR("Milo Kim");
965MODULE_LICENSE("GPL");
1/*
2 * Copyright 2012 Texas Instruments
3 *
4 * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 */
11
12#include <linux/module.h>
13#include <linux/slab.h>
14#include <linux/i2c.h>
15#include <linux/regmap.h>
16#include <linux/err.h>
17#include <linux/gpio.h>
18#include <linux/delay.h>
19#include <linux/regulator/lp872x.h>
20#include <linux/regulator/driver.h>
21#include <linux/platform_device.h>
22#include <linux/of.h>
23#include <linux/of_gpio.h>
24#include <linux/regulator/of_regulator.h>
25
26/* Registers : LP8720/8725 shared */
27#define LP872X_GENERAL_CFG 0x00
28#define LP872X_LDO1_VOUT 0x01
29#define LP872X_LDO2_VOUT 0x02
30#define LP872X_LDO3_VOUT 0x03
31#define LP872X_LDO4_VOUT 0x04
32#define LP872X_LDO5_VOUT 0x05
33
34/* Registers : LP8720 */
35#define LP8720_BUCK_VOUT1 0x06
36#define LP8720_BUCK_VOUT2 0x07
37#define LP8720_ENABLE 0x08
38
39/* Registers : LP8725 */
40#define LP8725_LILO1_VOUT 0x06
41#define LP8725_LILO2_VOUT 0x07
42#define LP8725_BUCK1_VOUT1 0x08
43#define LP8725_BUCK1_VOUT2 0x09
44#define LP8725_BUCK2_VOUT1 0x0A
45#define LP8725_BUCK2_VOUT2 0x0B
46#define LP8725_BUCK_CTRL 0x0C
47#define LP8725_LDO_CTRL 0x0D
48
49/* Mask/shift : LP8720/LP8725 shared */
50#define LP872X_VOUT_M 0x1F
51#define LP872X_START_DELAY_M 0xE0
52#define LP872X_START_DELAY_S 5
53#define LP872X_EN_LDO1_M BIT(0)
54#define LP872X_EN_LDO2_M BIT(1)
55#define LP872X_EN_LDO3_M BIT(2)
56#define LP872X_EN_LDO4_M BIT(3)
57#define LP872X_EN_LDO5_M BIT(4)
58
59/* Mask/shift : LP8720 */
60#define LP8720_TIMESTEP_S 0 /* Addr 00h */
61#define LP8720_TIMESTEP_M BIT(0)
62#define LP8720_EXT_DVS_M BIT(2)
63#define LP8720_BUCK_FPWM_S 5 /* Addr 07h */
64#define LP8720_BUCK_FPWM_M BIT(5)
65#define LP8720_EN_BUCK_M BIT(5) /* Addr 08h */
66#define LP8720_DVS_SEL_M BIT(7)
67
68/* Mask/shift : LP8725 */
69#define LP8725_TIMESTEP_M 0xC0 /* Addr 00h */
70#define LP8725_TIMESTEP_S 6
71#define LP8725_BUCK1_EN_M BIT(0)
72#define LP8725_DVS1_M BIT(2)
73#define LP8725_DVS2_M BIT(3)
74#define LP8725_BUCK2_EN_M BIT(4)
75#define LP8725_BUCK_CL_M 0xC0 /* Addr 09h, 0Bh */
76#define LP8725_BUCK_CL_S 6
77#define LP8725_BUCK1_FPWM_S 1 /* Addr 0Ch */
78#define LP8725_BUCK1_FPWM_M BIT(1)
79#define LP8725_BUCK2_FPWM_S 5
80#define LP8725_BUCK2_FPWM_M BIT(5)
81#define LP8725_EN_LILO1_M BIT(5) /* Addr 0Dh */
82#define LP8725_EN_LILO2_M BIT(6)
83
84/* PWM mode */
85#define LP872X_FORCE_PWM 1
86#define LP872X_AUTO_PWM 0
87
88#define LP8720_NUM_REGULATORS 6
89#define LP8725_NUM_REGULATORS 9
90#define EXTERN_DVS_USED 0
91#define MAX_DELAY 6
92
93/* Default DVS Mode */
94#define LP8720_DEFAULT_DVS 0
95#define LP8725_DEFAULT_DVS BIT(2)
96
97/* dump registers in regmap-debugfs */
98#define MAX_REGISTERS 0x0F
99
100enum lp872x_id {
101 LP8720,
102 LP8725,
103};
104
105struct lp872x {
106 struct regmap *regmap;
107 struct device *dev;
108 enum lp872x_id chipid;
109 struct lp872x_platform_data *pdata;
110 int num_regulators;
111 enum lp872x_dvs_state dvs_pin;
112};
113
114/* LP8720/LP8725 shared voltage table for LDOs */
115static const unsigned int lp872x_ldo_vtbl[] = {
116 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000,
117 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 2000000,
118 2100000, 2200000, 2300000, 2400000, 2500000, 2600000, 2650000, 2700000,
119 2750000, 2800000, 2850000, 2900000, 2950000, 3000000, 3100000, 3300000,
120};
121
122/* LP8720 LDO4 voltage table */
123static const unsigned int lp8720_ldo4_vtbl[] = {
124 800000, 850000, 900000, 1000000, 1100000, 1200000, 1250000, 1300000,
125 1350000, 1400000, 1450000, 1500000, 1550000, 1600000, 1650000, 1700000,
126 1750000, 1800000, 1850000, 1900000, 2000000, 2100000, 2200000, 2300000,
127 2400000, 2500000, 2600000, 2650000, 2700000, 2750000, 2800000, 2850000,
128};
129
130/* LP8725 LILO(Low Input Low Output) voltage table */
131static const unsigned int lp8725_lilo_vtbl[] = {
132 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000,
133 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1700000,
134 1800000, 1900000, 2000000, 2100000, 2200000, 2300000, 2400000, 2500000,
135 2600000, 2700000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000,
136};
137
138/* LP8720 BUCK voltage table */
139#define EXT_R 0 /* external resistor divider */
140static const unsigned int lp8720_buck_vtbl[] = {
141 EXT_R, 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000,
142 1150000, 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000,
143 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000,
144 1950000, 2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000,
145};
146
147/* LP8725 BUCK voltage table */
148static const unsigned int lp8725_buck_vtbl[] = {
149 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000,
150 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1700000,
151 1750000, 1800000, 1850000, 1900000, 2000000, 2100000, 2200000, 2300000,
152 2400000, 2500000, 2600000, 2700000, 2800000, 2850000, 2900000, 3000000,
153};
154
155/* LP8725 BUCK current limit */
156static const unsigned int lp8725_buck_uA[] = {
157 460000, 780000, 1050000, 1370000,
158};
159
160static int lp872x_read_byte(struct lp872x *lp, u8 addr, u8 *data)
161{
162 int ret;
163 unsigned int val;
164
165 ret = regmap_read(lp->regmap, addr, &val);
166 if (ret < 0) {
167 dev_err(lp->dev, "failed to read 0x%.2x\n", addr);
168 return ret;
169 }
170
171 *data = (u8)val;
172 return 0;
173}
174
175static inline int lp872x_write_byte(struct lp872x *lp, u8 addr, u8 data)
176{
177 return regmap_write(lp->regmap, addr, data);
178}
179
180static inline int lp872x_update_bits(struct lp872x *lp, u8 addr,
181 unsigned int mask, u8 data)
182{
183 return regmap_update_bits(lp->regmap, addr, mask, data);
184}
185
186static int lp872x_get_timestep_usec(struct lp872x *lp)
187{
188 enum lp872x_id chip = lp->chipid;
189 u8 val, mask, shift;
190 int *time_usec, size, ret;
191 int lp8720_time_usec[] = { 25, 50 };
192 int lp8725_time_usec[] = { 32, 64, 128, 256 };
193
194 switch (chip) {
195 case LP8720:
196 mask = LP8720_TIMESTEP_M;
197 shift = LP8720_TIMESTEP_S;
198 time_usec = &lp8720_time_usec[0];
199 size = ARRAY_SIZE(lp8720_time_usec);
200 break;
201 case LP8725:
202 mask = LP8725_TIMESTEP_M;
203 shift = LP8725_TIMESTEP_S;
204 time_usec = &lp8725_time_usec[0];
205 size = ARRAY_SIZE(lp8725_time_usec);
206 break;
207 default:
208 return -EINVAL;
209 }
210
211 ret = lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val);
212 if (ret)
213 return ret;
214
215 val = (val & mask) >> shift;
216 if (val >= size)
217 return -EINVAL;
218
219 return *(time_usec + val);
220}
221
222static int lp872x_regulator_enable_time(struct regulator_dev *rdev)
223{
224 struct lp872x *lp = rdev_get_drvdata(rdev);
225 enum lp872x_regulator_id rid = rdev_get_id(rdev);
226 int time_step_us = lp872x_get_timestep_usec(lp);
227 int ret;
228 u8 addr, val;
229
230 if (time_step_us < 0)
231 return time_step_us;
232
233 switch (rid) {
234 case LP8720_ID_LDO1 ... LP8720_ID_BUCK:
235 addr = LP872X_LDO1_VOUT + rid;
236 break;
237 case LP8725_ID_LDO1 ... LP8725_ID_BUCK1:
238 addr = LP872X_LDO1_VOUT + rid - LP8725_ID_BASE;
239 break;
240 case LP8725_ID_BUCK2:
241 addr = LP8725_BUCK2_VOUT1;
242 break;
243 default:
244 return -EINVAL;
245 }
246
247 ret = lp872x_read_byte(lp, addr, &val);
248 if (ret)
249 return ret;
250
251 val = (val & LP872X_START_DELAY_M) >> LP872X_START_DELAY_S;
252
253 return val > MAX_DELAY ? 0 : val * time_step_us;
254}
255
256static void lp872x_set_dvs(struct lp872x *lp, enum lp872x_dvs_sel dvs_sel,
257 int gpio)
258{
259 enum lp872x_dvs_state state;
260
261 state = dvs_sel == SEL_V1 ? DVS_HIGH : DVS_LOW;
262 gpio_set_value(gpio, state);
263 lp->dvs_pin = state;
264}
265
266static u8 lp872x_select_buck_vout_addr(struct lp872x *lp,
267 enum lp872x_regulator_id buck)
268{
269 u8 val, addr;
270
271 if (lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val))
272 return 0;
273
274 switch (buck) {
275 case LP8720_ID_BUCK:
276 if (val & LP8720_EXT_DVS_M) {
277 addr = (lp->dvs_pin == DVS_HIGH) ?
278 LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2;
279 } else {
280 if (lp872x_read_byte(lp, LP8720_ENABLE, &val))
281 return 0;
282
283 addr = val & LP8720_DVS_SEL_M ?
284 LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2;
285 }
286 break;
287 case LP8725_ID_BUCK1:
288 if (val & LP8725_DVS1_M)
289 addr = LP8725_BUCK1_VOUT1;
290 else
291 addr = (lp->dvs_pin == DVS_HIGH) ?
292 LP8725_BUCK1_VOUT1 : LP8725_BUCK1_VOUT2;
293 break;
294 case LP8725_ID_BUCK2:
295 addr = val & LP8725_DVS2_M ?
296 LP8725_BUCK2_VOUT1 : LP8725_BUCK2_VOUT2;
297 break;
298 default:
299 return 0;
300 }
301
302 return addr;
303}
304
305static bool lp872x_is_valid_buck_addr(u8 addr)
306{
307 switch (addr) {
308 case LP8720_BUCK_VOUT1:
309 case LP8720_BUCK_VOUT2:
310 case LP8725_BUCK1_VOUT1:
311 case LP8725_BUCK1_VOUT2:
312 case LP8725_BUCK2_VOUT1:
313 case LP8725_BUCK2_VOUT2:
314 return true;
315 default:
316 return false;
317 }
318}
319
320static int lp872x_buck_set_voltage_sel(struct regulator_dev *rdev,
321 unsigned selector)
322{
323 struct lp872x *lp = rdev_get_drvdata(rdev);
324 enum lp872x_regulator_id buck = rdev_get_id(rdev);
325 u8 addr, mask = LP872X_VOUT_M;
326 struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL;
327
328 if (dvs && gpio_is_valid(dvs->gpio))
329 lp872x_set_dvs(lp, dvs->vsel, dvs->gpio);
330
331 addr = lp872x_select_buck_vout_addr(lp, buck);
332 if (!lp872x_is_valid_buck_addr(addr))
333 return -EINVAL;
334
335 return lp872x_update_bits(lp, addr, mask, selector);
336}
337
338static int lp872x_buck_get_voltage_sel(struct regulator_dev *rdev)
339{
340 struct lp872x *lp = rdev_get_drvdata(rdev);
341 enum lp872x_regulator_id buck = rdev_get_id(rdev);
342 u8 addr, val;
343 int ret;
344
345 addr = lp872x_select_buck_vout_addr(lp, buck);
346 if (!lp872x_is_valid_buck_addr(addr))
347 return -EINVAL;
348
349 ret = lp872x_read_byte(lp, addr, &val);
350 if (ret)
351 return ret;
352
353 return val & LP872X_VOUT_M;
354}
355
356static int lp8725_buck_set_current_limit(struct regulator_dev *rdev,
357 int min_uA, int max_uA)
358{
359 struct lp872x *lp = rdev_get_drvdata(rdev);
360 enum lp872x_regulator_id buck = rdev_get_id(rdev);
361 int i;
362 u8 addr;
363
364 switch (buck) {
365 case LP8725_ID_BUCK1:
366 addr = LP8725_BUCK1_VOUT2;
367 break;
368 case LP8725_ID_BUCK2:
369 addr = LP8725_BUCK2_VOUT2;
370 break;
371 default:
372 return -EINVAL;
373 }
374
375 for (i = ARRAY_SIZE(lp8725_buck_uA) - 1; i >= 0; i--) {
376 if (lp8725_buck_uA[i] >= min_uA &&
377 lp8725_buck_uA[i] <= max_uA)
378 return lp872x_update_bits(lp, addr,
379 LP8725_BUCK_CL_M,
380 i << LP8725_BUCK_CL_S);
381 }
382
383 return -EINVAL;
384}
385
386static int lp8725_buck_get_current_limit(struct regulator_dev *rdev)
387{
388 struct lp872x *lp = rdev_get_drvdata(rdev);
389 enum lp872x_regulator_id buck = rdev_get_id(rdev);
390 u8 addr, val;
391 int ret;
392
393 switch (buck) {
394 case LP8725_ID_BUCK1:
395 addr = LP8725_BUCK1_VOUT2;
396 break;
397 case LP8725_ID_BUCK2:
398 addr = LP8725_BUCK2_VOUT2;
399 break;
400 default:
401 return -EINVAL;
402 }
403
404 ret = lp872x_read_byte(lp, addr, &val);
405 if (ret)
406 return ret;
407
408 val = (val & LP8725_BUCK_CL_M) >> LP8725_BUCK_CL_S;
409
410 return (val < ARRAY_SIZE(lp8725_buck_uA)) ?
411 lp8725_buck_uA[val] : -EINVAL;
412}
413
414static int lp872x_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
415{
416 struct lp872x *lp = rdev_get_drvdata(rdev);
417 enum lp872x_regulator_id buck = rdev_get_id(rdev);
418 u8 addr, mask, shift, val;
419
420 switch (buck) {
421 case LP8720_ID_BUCK:
422 addr = LP8720_BUCK_VOUT2;
423 mask = LP8720_BUCK_FPWM_M;
424 shift = LP8720_BUCK_FPWM_S;
425 break;
426 case LP8725_ID_BUCK1:
427 addr = LP8725_BUCK_CTRL;
428 mask = LP8725_BUCK1_FPWM_M;
429 shift = LP8725_BUCK1_FPWM_S;
430 break;
431 case LP8725_ID_BUCK2:
432 addr = LP8725_BUCK_CTRL;
433 mask = LP8725_BUCK2_FPWM_M;
434 shift = LP8725_BUCK2_FPWM_S;
435 break;
436 default:
437 return -EINVAL;
438 }
439
440 if (mode == REGULATOR_MODE_FAST)
441 val = LP872X_FORCE_PWM << shift;
442 else if (mode == REGULATOR_MODE_NORMAL)
443 val = LP872X_AUTO_PWM << shift;
444 else
445 return -EINVAL;
446
447 return lp872x_update_bits(lp, addr, mask, val);
448}
449
450static unsigned int lp872x_buck_get_mode(struct regulator_dev *rdev)
451{
452 struct lp872x *lp = rdev_get_drvdata(rdev);
453 enum lp872x_regulator_id buck = rdev_get_id(rdev);
454 u8 addr, mask, val;
455 int ret;
456
457 switch (buck) {
458 case LP8720_ID_BUCK:
459 addr = LP8720_BUCK_VOUT2;
460 mask = LP8720_BUCK_FPWM_M;
461 break;
462 case LP8725_ID_BUCK1:
463 addr = LP8725_BUCK_CTRL;
464 mask = LP8725_BUCK1_FPWM_M;
465 break;
466 case LP8725_ID_BUCK2:
467 addr = LP8725_BUCK_CTRL;
468 mask = LP8725_BUCK2_FPWM_M;
469 break;
470 default:
471 return -EINVAL;
472 }
473
474 ret = lp872x_read_byte(lp, addr, &val);
475 if (ret)
476 return ret;
477
478 return val & mask ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL;
479}
480
481static struct regulator_ops lp872x_ldo_ops = {
482 .list_voltage = regulator_list_voltage_table,
483 .map_voltage = regulator_map_voltage_ascend,
484 .set_voltage_sel = regulator_set_voltage_sel_regmap,
485 .get_voltage_sel = regulator_get_voltage_sel_regmap,
486 .enable = regulator_enable_regmap,
487 .disable = regulator_disable_regmap,
488 .is_enabled = regulator_is_enabled_regmap,
489 .enable_time = lp872x_regulator_enable_time,
490};
491
492static struct regulator_ops lp8720_buck_ops = {
493 .list_voltage = regulator_list_voltage_table,
494 .map_voltage = regulator_map_voltage_ascend,
495 .set_voltage_sel = lp872x_buck_set_voltage_sel,
496 .get_voltage_sel = lp872x_buck_get_voltage_sel,
497 .enable = regulator_enable_regmap,
498 .disable = regulator_disable_regmap,
499 .is_enabled = regulator_is_enabled_regmap,
500 .enable_time = lp872x_regulator_enable_time,
501 .set_mode = lp872x_buck_set_mode,
502 .get_mode = lp872x_buck_get_mode,
503};
504
505static struct regulator_ops lp8725_buck_ops = {
506 .list_voltage = regulator_list_voltage_table,
507 .map_voltage = regulator_map_voltage_ascend,
508 .set_voltage_sel = lp872x_buck_set_voltage_sel,
509 .get_voltage_sel = lp872x_buck_get_voltage_sel,
510 .enable = regulator_enable_regmap,
511 .disable = regulator_disable_regmap,
512 .is_enabled = regulator_is_enabled_regmap,
513 .enable_time = lp872x_regulator_enable_time,
514 .set_mode = lp872x_buck_set_mode,
515 .get_mode = lp872x_buck_get_mode,
516 .set_current_limit = lp8725_buck_set_current_limit,
517 .get_current_limit = lp8725_buck_get_current_limit,
518};
519
520static struct regulator_desc lp8720_regulator_desc[] = {
521 {
522 .name = "ldo1",
523 .of_match = of_match_ptr("ldo1"),
524 .id = LP8720_ID_LDO1,
525 .ops = &lp872x_ldo_ops,
526 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl),
527 .volt_table = lp872x_ldo_vtbl,
528 .type = REGULATOR_VOLTAGE,
529 .owner = THIS_MODULE,
530 .vsel_reg = LP872X_LDO1_VOUT,
531 .vsel_mask = LP872X_VOUT_M,
532 .enable_reg = LP8720_ENABLE,
533 .enable_mask = LP872X_EN_LDO1_M,
534 },
535 {
536 .name = "ldo2",
537 .of_match = of_match_ptr("ldo2"),
538 .id = LP8720_ID_LDO2,
539 .ops = &lp872x_ldo_ops,
540 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl),
541 .volt_table = lp872x_ldo_vtbl,
542 .type = REGULATOR_VOLTAGE,
543 .owner = THIS_MODULE,
544 .vsel_reg = LP872X_LDO2_VOUT,
545 .vsel_mask = LP872X_VOUT_M,
546 .enable_reg = LP8720_ENABLE,
547 .enable_mask = LP872X_EN_LDO2_M,
548 },
549 {
550 .name = "ldo3",
551 .of_match = of_match_ptr("ldo3"),
552 .id = LP8720_ID_LDO3,
553 .ops = &lp872x_ldo_ops,
554 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl),
555 .volt_table = lp872x_ldo_vtbl,
556 .type = REGULATOR_VOLTAGE,
557 .owner = THIS_MODULE,
558 .vsel_reg = LP872X_LDO3_VOUT,
559 .vsel_mask = LP872X_VOUT_M,
560 .enable_reg = LP8720_ENABLE,
561 .enable_mask = LP872X_EN_LDO3_M,
562 },
563 {
564 .name = "ldo4",
565 .of_match = of_match_ptr("ldo4"),
566 .id = LP8720_ID_LDO4,
567 .ops = &lp872x_ldo_ops,
568 .n_voltages = ARRAY_SIZE(lp8720_ldo4_vtbl),
569 .volt_table = lp8720_ldo4_vtbl,
570 .type = REGULATOR_VOLTAGE,
571 .owner = THIS_MODULE,
572 .vsel_reg = LP872X_LDO4_VOUT,
573 .vsel_mask = LP872X_VOUT_M,
574 .enable_reg = LP8720_ENABLE,
575 .enable_mask = LP872X_EN_LDO4_M,
576 },
577 {
578 .name = "ldo5",
579 .of_match = of_match_ptr("ldo5"),
580 .id = LP8720_ID_LDO5,
581 .ops = &lp872x_ldo_ops,
582 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl),
583 .volt_table = lp872x_ldo_vtbl,
584 .type = REGULATOR_VOLTAGE,
585 .owner = THIS_MODULE,
586 .vsel_reg = LP872X_LDO5_VOUT,
587 .vsel_mask = LP872X_VOUT_M,
588 .enable_reg = LP8720_ENABLE,
589 .enable_mask = LP872X_EN_LDO5_M,
590 },
591 {
592 .name = "buck",
593 .of_match = of_match_ptr("buck"),
594 .id = LP8720_ID_BUCK,
595 .ops = &lp8720_buck_ops,
596 .n_voltages = ARRAY_SIZE(lp8720_buck_vtbl),
597 .volt_table = lp8720_buck_vtbl,
598 .type = REGULATOR_VOLTAGE,
599 .owner = THIS_MODULE,
600 .enable_reg = LP8720_ENABLE,
601 .enable_mask = LP8720_EN_BUCK_M,
602 },
603};
604
605static struct regulator_desc lp8725_regulator_desc[] = {
606 {
607 .name = "ldo1",
608 .of_match = of_match_ptr("ldo1"),
609 .id = LP8725_ID_LDO1,
610 .ops = &lp872x_ldo_ops,
611 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl),
612 .volt_table = lp872x_ldo_vtbl,
613 .type = REGULATOR_VOLTAGE,
614 .owner = THIS_MODULE,
615 .vsel_reg = LP872X_LDO1_VOUT,
616 .vsel_mask = LP872X_VOUT_M,
617 .enable_reg = LP8725_LDO_CTRL,
618 .enable_mask = LP872X_EN_LDO1_M,
619 },
620 {
621 .name = "ldo2",
622 .of_match = of_match_ptr("ldo2"),
623 .id = LP8725_ID_LDO2,
624 .ops = &lp872x_ldo_ops,
625 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl),
626 .volt_table = lp872x_ldo_vtbl,
627 .type = REGULATOR_VOLTAGE,
628 .owner = THIS_MODULE,
629 .vsel_reg = LP872X_LDO2_VOUT,
630 .vsel_mask = LP872X_VOUT_M,
631 .enable_reg = LP8725_LDO_CTRL,
632 .enable_mask = LP872X_EN_LDO2_M,
633 },
634 {
635 .name = "ldo3",
636 .of_match = of_match_ptr("ldo3"),
637 .id = LP8725_ID_LDO3,
638 .ops = &lp872x_ldo_ops,
639 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl),
640 .volt_table = lp872x_ldo_vtbl,
641 .type = REGULATOR_VOLTAGE,
642 .owner = THIS_MODULE,
643 .vsel_reg = LP872X_LDO3_VOUT,
644 .vsel_mask = LP872X_VOUT_M,
645 .enable_reg = LP8725_LDO_CTRL,
646 .enable_mask = LP872X_EN_LDO3_M,
647 },
648 {
649 .name = "ldo4",
650 .of_match = of_match_ptr("ldo4"),
651 .id = LP8725_ID_LDO4,
652 .ops = &lp872x_ldo_ops,
653 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl),
654 .volt_table = lp872x_ldo_vtbl,
655 .type = REGULATOR_VOLTAGE,
656 .owner = THIS_MODULE,
657 .vsel_reg = LP872X_LDO4_VOUT,
658 .vsel_mask = LP872X_VOUT_M,
659 .enable_reg = LP8725_LDO_CTRL,
660 .enable_mask = LP872X_EN_LDO4_M,
661 },
662 {
663 .name = "ldo5",
664 .of_match = of_match_ptr("ldo5"),
665 .id = LP8725_ID_LDO5,
666 .ops = &lp872x_ldo_ops,
667 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl),
668 .volt_table = lp872x_ldo_vtbl,
669 .type = REGULATOR_VOLTAGE,
670 .owner = THIS_MODULE,
671 .vsel_reg = LP872X_LDO5_VOUT,
672 .vsel_mask = LP872X_VOUT_M,
673 .enable_reg = LP8725_LDO_CTRL,
674 .enable_mask = LP872X_EN_LDO5_M,
675 },
676 {
677 .name = "lilo1",
678 .of_match = of_match_ptr("lilo1"),
679 .id = LP8725_ID_LILO1,
680 .ops = &lp872x_ldo_ops,
681 .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl),
682 .volt_table = lp8725_lilo_vtbl,
683 .type = REGULATOR_VOLTAGE,
684 .owner = THIS_MODULE,
685 .vsel_reg = LP8725_LILO1_VOUT,
686 .vsel_mask = LP872X_VOUT_M,
687 .enable_reg = LP8725_LDO_CTRL,
688 .enable_mask = LP8725_EN_LILO1_M,
689 },
690 {
691 .name = "lilo2",
692 .of_match = of_match_ptr("lilo2"),
693 .id = LP8725_ID_LILO2,
694 .ops = &lp872x_ldo_ops,
695 .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl),
696 .volt_table = lp8725_lilo_vtbl,
697 .type = REGULATOR_VOLTAGE,
698 .owner = THIS_MODULE,
699 .vsel_reg = LP8725_LILO2_VOUT,
700 .vsel_mask = LP872X_VOUT_M,
701 .enable_reg = LP8725_LDO_CTRL,
702 .enable_mask = LP8725_EN_LILO2_M,
703 },
704 {
705 .name = "buck1",
706 .of_match = of_match_ptr("buck1"),
707 .id = LP8725_ID_BUCK1,
708 .ops = &lp8725_buck_ops,
709 .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl),
710 .volt_table = lp8725_buck_vtbl,
711 .type = REGULATOR_VOLTAGE,
712 .owner = THIS_MODULE,
713 .enable_reg = LP872X_GENERAL_CFG,
714 .enable_mask = LP8725_BUCK1_EN_M,
715 },
716 {
717 .name = "buck2",
718 .of_match = of_match_ptr("buck2"),
719 .id = LP8725_ID_BUCK2,
720 .ops = &lp8725_buck_ops,
721 .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl),
722 .volt_table = lp8725_buck_vtbl,
723 .type = REGULATOR_VOLTAGE,
724 .owner = THIS_MODULE,
725 .enable_reg = LP872X_GENERAL_CFG,
726 .enable_mask = LP8725_BUCK2_EN_M,
727 },
728};
729
730static int lp872x_init_dvs(struct lp872x *lp)
731{
732 int ret, gpio;
733 struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL;
734 enum lp872x_dvs_state pinstate;
735 u8 mask[] = { LP8720_EXT_DVS_M, LP8725_DVS1_M | LP8725_DVS2_M };
736 u8 default_dvs_mode[] = { LP8720_DEFAULT_DVS, LP8725_DEFAULT_DVS };
737
738 if (!dvs)
739 goto set_default_dvs_mode;
740
741 gpio = dvs->gpio;
742 if (!gpio_is_valid(gpio))
743 goto set_default_dvs_mode;
744
745 pinstate = dvs->init_state;
746 ret = devm_gpio_request_one(lp->dev, gpio, pinstate, "LP872X DVS");
747 if (ret) {
748 dev_err(lp->dev, "gpio request err: %d\n", ret);
749 return ret;
750 }
751
752 lp->dvs_pin = pinstate;
753
754 return 0;
755
756set_default_dvs_mode:
757 return lp872x_update_bits(lp, LP872X_GENERAL_CFG, mask[lp->chipid],
758 default_dvs_mode[lp->chipid]);
759}
760
761static int lp872x_hw_enable(struct lp872x *lp)
762{
763 int ret, gpio;
764
765 if (!lp->pdata)
766 return -EINVAL;
767
768 gpio = lp->pdata->enable_gpio;
769 if (!gpio_is_valid(gpio))
770 return 0;
771
772 /* Always set enable GPIO high. */
773 ret = devm_gpio_request_one(lp->dev, gpio, GPIOF_OUT_INIT_HIGH, "LP872X EN");
774 if (ret) {
775 dev_err(lp->dev, "gpio request err: %d\n", ret);
776 return ret;
777 }
778
779 /* Each chip has a different enable delay. */
780 if (lp->chipid == LP8720)
781 usleep_range(LP8720_ENABLE_DELAY, 1.5 * LP8720_ENABLE_DELAY);
782 else
783 usleep_range(LP8725_ENABLE_DELAY, 1.5 * LP8725_ENABLE_DELAY);
784
785 return 0;
786}
787
788static int lp872x_config(struct lp872x *lp)
789{
790 struct lp872x_platform_data *pdata = lp->pdata;
791 int ret;
792
793 if (!pdata || !pdata->update_config)
794 goto init_dvs;
795
796 ret = lp872x_write_byte(lp, LP872X_GENERAL_CFG, pdata->general_config);
797 if (ret)
798 return ret;
799
800init_dvs:
801 return lp872x_init_dvs(lp);
802}
803
804static struct regulator_init_data
805*lp872x_find_regulator_init_data(int id, struct lp872x *lp)
806{
807 struct lp872x_platform_data *pdata = lp->pdata;
808 int i;
809
810 if (!pdata)
811 return NULL;
812
813 for (i = 0; i < lp->num_regulators; i++) {
814 if (pdata->regulator_data[i].id == id)
815 return pdata->regulator_data[i].init_data;
816 }
817
818 return NULL;
819}
820
821static int lp872x_regulator_register(struct lp872x *lp)
822{
823 struct regulator_desc *desc;
824 struct regulator_config cfg = { };
825 struct regulator_dev *rdev;
826 int i;
827
828 for (i = 0; i < lp->num_regulators; i++) {
829 desc = (lp->chipid == LP8720) ? &lp8720_regulator_desc[i] :
830 &lp8725_regulator_desc[i];
831
832 cfg.dev = lp->dev;
833 cfg.init_data = lp872x_find_regulator_init_data(desc->id, lp);
834 cfg.driver_data = lp;
835 cfg.regmap = lp->regmap;
836
837 rdev = devm_regulator_register(lp->dev, desc, &cfg);
838 if (IS_ERR(rdev)) {
839 dev_err(lp->dev, "regulator register err");
840 return PTR_ERR(rdev);
841 }
842 }
843
844 return 0;
845}
846
847static const struct regmap_config lp872x_regmap_config = {
848 .reg_bits = 8,
849 .val_bits = 8,
850 .max_register = MAX_REGISTERS,
851};
852
853#ifdef CONFIG_OF
854
855#define LP872X_VALID_OPMODE (REGULATOR_MODE_FAST | REGULATOR_MODE_NORMAL)
856
857static struct of_regulator_match lp8720_matches[] = {
858 { .name = "ldo1", .driver_data = (void *)LP8720_ID_LDO1, },
859 { .name = "ldo2", .driver_data = (void *)LP8720_ID_LDO2, },
860 { .name = "ldo3", .driver_data = (void *)LP8720_ID_LDO3, },
861 { .name = "ldo4", .driver_data = (void *)LP8720_ID_LDO4, },
862 { .name = "ldo5", .driver_data = (void *)LP8720_ID_LDO5, },
863 { .name = "buck", .driver_data = (void *)LP8720_ID_BUCK, },
864};
865
866static struct of_regulator_match lp8725_matches[] = {
867 { .name = "ldo1", .driver_data = (void *)LP8725_ID_LDO1, },
868 { .name = "ldo2", .driver_data = (void *)LP8725_ID_LDO2, },
869 { .name = "ldo3", .driver_data = (void *)LP8725_ID_LDO3, },
870 { .name = "ldo4", .driver_data = (void *)LP8725_ID_LDO4, },
871 { .name = "ldo5", .driver_data = (void *)LP8725_ID_LDO5, },
872 { .name = "lilo1", .driver_data = (void *)LP8725_ID_LILO1, },
873 { .name = "lilo2", .driver_data = (void *)LP8725_ID_LILO2, },
874 { .name = "buck1", .driver_data = (void *)LP8725_ID_BUCK1, },
875 { .name = "buck2", .driver_data = (void *)LP8725_ID_BUCK2, },
876};
877
878static struct lp872x_platform_data
879*lp872x_populate_pdata_from_dt(struct device *dev, enum lp872x_id which)
880{
881 struct device_node *np = dev->of_node;
882 struct lp872x_platform_data *pdata;
883 struct of_regulator_match *match;
884 int num_matches;
885 int count;
886 int i;
887 u8 dvs_state;
888
889 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
890 if (!pdata)
891 return ERR_PTR(-ENOMEM);
892
893 of_property_read_u8(np, "ti,general-config", &pdata->general_config);
894 if (of_find_property(np, "ti,update-config", NULL))
895 pdata->update_config = true;
896
897 pdata->dvs = devm_kzalloc(dev, sizeof(struct lp872x_dvs), GFP_KERNEL);
898 if (!pdata->dvs)
899 return ERR_PTR(-ENOMEM);
900
901 pdata->dvs->gpio = of_get_named_gpio(np, "ti,dvs-gpio", 0);
902 of_property_read_u8(np, "ti,dvs-vsel", (u8 *)&pdata->dvs->vsel);
903 of_property_read_u8(np, "ti,dvs-state", &dvs_state);
904 pdata->dvs->init_state = dvs_state ? DVS_HIGH : DVS_LOW;
905
906 pdata->enable_gpio = of_get_named_gpio(np, "enable-gpios", 0);
907
908 if (of_get_child_count(np) == 0)
909 goto out;
910
911 switch (which) {
912 case LP8720:
913 match = lp8720_matches;
914 num_matches = ARRAY_SIZE(lp8720_matches);
915 break;
916 case LP8725:
917 match = lp8725_matches;
918 num_matches = ARRAY_SIZE(lp8725_matches);
919 break;
920 default:
921 goto out;
922 }
923
924 count = of_regulator_match(dev, np, match, num_matches);
925 if (count <= 0)
926 goto out;
927
928 for (i = 0; i < num_matches; i++) {
929 pdata->regulator_data[i].id =
930 (enum lp872x_regulator_id)match[i].driver_data;
931 pdata->regulator_data[i].init_data = match[i].init_data;
932 }
933out:
934 return pdata;
935}
936#else
937static struct lp872x_platform_data
938*lp872x_populate_pdata_from_dt(struct device *dev, enum lp872x_id which)
939{
940 return NULL;
941}
942#endif
943
944static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id)
945{
946 struct lp872x *lp;
947 struct lp872x_platform_data *pdata;
948 int ret;
949 const int lp872x_num_regulators[] = {
950 [LP8720] = LP8720_NUM_REGULATORS,
951 [LP8725] = LP8725_NUM_REGULATORS,
952 };
953
954 if (cl->dev.of_node) {
955 pdata = lp872x_populate_pdata_from_dt(&cl->dev,
956 (enum lp872x_id)id->driver_data);
957 if (IS_ERR(pdata))
958 return PTR_ERR(pdata);
959 } else {
960 pdata = dev_get_platdata(&cl->dev);
961 }
962
963 lp = devm_kzalloc(&cl->dev, sizeof(struct lp872x), GFP_KERNEL);
964 if (!lp)
965 return -ENOMEM;
966
967 lp->num_regulators = lp872x_num_regulators[id->driver_data];
968
969 lp->regmap = devm_regmap_init_i2c(cl, &lp872x_regmap_config);
970 if (IS_ERR(lp->regmap)) {
971 ret = PTR_ERR(lp->regmap);
972 dev_err(&cl->dev, "regmap init i2c err: %d\n", ret);
973 return ret;
974 }
975
976 lp->dev = &cl->dev;
977 lp->pdata = pdata;
978 lp->chipid = id->driver_data;
979 i2c_set_clientdata(cl, lp);
980
981 ret = lp872x_hw_enable(lp);
982 if (ret)
983 return ret;
984
985 ret = lp872x_config(lp);
986 if (ret)
987 return ret;
988
989 return lp872x_regulator_register(lp);
990}
991
992static const struct of_device_id lp872x_dt_ids[] = {
993 { .compatible = "ti,lp8720", },
994 { .compatible = "ti,lp8725", },
995 { }
996};
997MODULE_DEVICE_TABLE(of, lp872x_dt_ids);
998
999static const struct i2c_device_id lp872x_ids[] = {
1000 {"lp8720", LP8720},
1001 {"lp8725", LP8725},
1002 { }
1003};
1004MODULE_DEVICE_TABLE(i2c, lp872x_ids);
1005
1006static struct i2c_driver lp872x_driver = {
1007 .driver = {
1008 .name = "lp872x",
1009 .of_match_table = of_match_ptr(lp872x_dt_ids),
1010 },
1011 .probe = lp872x_probe,
1012 .id_table = lp872x_ids,
1013};
1014
1015module_i2c_driver(lp872x_driver);
1016
1017MODULE_DESCRIPTION("TI/National Semiconductor LP872x PMU Regulator Driver");
1018MODULE_AUTHOR("Milo Kim");
1019MODULE_LICENSE("GPL");