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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/regulator/lp872x.h> |
19 | #include <linux/regulator/driver.h> |
20 | #include <linux/platform_device.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 | |
96 | enum lp872x_id { |
97 | LP8720, |
98 | LP8725, |
99 | }; |
100 | |
101 | struct lp872x { |
102 | struct regmap *regmap; |
103 | struct device *dev; |
104 | enum lp872x_id chipid; |
105 | struct lp872x_platform_data *pdata; |
106 | struct regulator_dev **regulators; |
107 | int num_regulators; |
108 | enum lp872x_dvs_state dvs_pin; |
109 | int dvs_gpio; |
110 | }; |
111 | |
112 | /* LP8720/LP8725 shared voltage table for LDOs */ |
113 | static const unsigned int lp872x_ldo_vtbl[] = { |
114 | 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000, |
115 | 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 2000000, |
116 | 2100000, 2200000, 2300000, 2400000, 2500000, 2600000, 2650000, 2700000, |
117 | 2750000, 2800000, 2850000, 2900000, 2950000, 3000000, 3100000, 3300000, |
118 | }; |
119 | |
120 | /* LP8720 LDO4 voltage table */ |
121 | static const unsigned int lp8720_ldo4_vtbl[] = { |
122 | 800000, 850000, 900000, 1000000, 1100000, 1200000, 1250000, 1300000, |
123 | 1350000, 1400000, 1450000, 1500000, 1550000, 1600000, 1650000, 1700000, |
124 | 1750000, 1800000, 1850000, 1900000, 2000000, 2100000, 2200000, 2300000, |
125 | 2400000, 2500000, 2600000, 2650000, 2700000, 2750000, 2800000, 2850000, |
126 | }; |
127 | |
128 | /* LP8725 LILO(Low Input Low Output) voltage table */ |
129 | static const unsigned int lp8725_lilo_vtbl[] = { |
130 | 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, |
131 | 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1700000, |
132 | 1800000, 1900000, 2000000, 2100000, 2200000, 2300000, 2400000, 2500000, |
133 | 2600000, 2700000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000, |
134 | }; |
135 | |
136 | /* LP8720 BUCK voltage table */ |
137 | #define EXT_R 0 /* external resistor divider */ |
138 | static const unsigned int lp8720_buck_vtbl[] = { |
139 | EXT_R, 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, |
140 | 1150000, 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, |
141 | 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, |
142 | 1950000, 2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, |
143 | }; |
144 | |
145 | /* LP8725 BUCK voltage table */ |
146 | static const unsigned int lp8725_buck_vtbl[] = { |
147 | 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, |
148 | 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1700000, |
149 | 1750000, 1800000, 1850000, 1900000, 2000000, 2100000, 2200000, 2300000, |
150 | 2400000, 2500000, 2600000, 2700000, 2800000, 2850000, 2900000, 3000000, |
151 | }; |
152 | |
153 | /* LP8725 BUCK current limit */ |
154 | static const unsigned int lp8725_buck_uA[] = { |
155 | 460000, 780000, 1050000, 1370000, |
156 | }; |
157 | |
158 | static int lp872x_read_byte(struct lp872x *lp, u8 addr, u8 *data) |
159 | { |
160 | int ret; |
161 | unsigned int val; |
162 | |
163 | ret = regmap_read(lp->regmap, addr, &val); |
164 | if (ret < 0) { |
165 | dev_err(lp->dev, "failed to read 0x%.2x\n", addr); |
166 | return ret; |
167 | } |
168 | |
169 | *data = (u8)val; |
170 | return 0; |
171 | } |
172 | |
173 | static inline int lp872x_write_byte(struct lp872x *lp, u8 addr, u8 data) |
174 | { |
175 | return regmap_write(lp->regmap, addr, data); |
176 | } |
177 | |
178 | static inline int lp872x_update_bits(struct lp872x *lp, u8 addr, |
179 | unsigned int mask, u8 data) |
180 | { |
181 | return regmap_update_bits(lp->regmap, addr, mask, data); |
182 | } |
183 | |
184 | static int lp872x_get_timestep_usec(struct lp872x *lp) |
185 | { |
186 | enum lp872x_id chip = lp->chipid; |
187 | u8 val, mask, shift; |
188 | int *time_usec, size, ret; |
189 | int lp8720_time_usec[] = { 25, 50 }; |
190 | int lp8725_time_usec[] = { 32, 64, 128, 256 }; |
191 | |
192 | switch (chip) { |
193 | case LP8720: |
194 | mask = LP8720_TIMESTEP_M; |
195 | shift = LP8720_TIMESTEP_S; |
196 | time_usec = &lp8720_time_usec[0]; |
197 | size = ARRAY_SIZE(lp8720_time_usec); |
198 | break; |
199 | case LP8725: |
200 | mask = LP8725_TIMESTEP_M; |
201 | shift = LP8725_TIMESTEP_S; |
202 | time_usec = &lp8725_time_usec[0]; |
203 | size = ARRAY_SIZE(lp8725_time_usec); |
204 | break; |
205 | default: |
206 | return -EINVAL; |
207 | } |
208 | |
209 | ret = lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val); |
210 | if (ret) |
211 | return -EINVAL; |
212 | |
213 | val = (val & mask) >> shift; |
214 | if (val >= size) |
215 | return -EINVAL; |
216 | |
217 | return *(time_usec + val); |
218 | } |
219 | |
220 | static int lp872x_regulator_enable_time(struct regulator_dev *rdev) |
221 | { |
222 | struct lp872x *lp = rdev_get_drvdata(rdev); |
223 | enum lp872x_regulator_id rid = rdev_get_id(rdev); |
224 | int time_step_us = lp872x_get_timestep_usec(lp); |
225 | int ret; |
226 | u8 addr, val; |
227 | |
228 | if (time_step_us < 0) |
229 | return -EINVAL; |
230 | |
231 | switch (rid) { |
232 | case LP8720_ID_LDO1 ... LP8720_ID_BUCK: |
233 | addr = LP872X_LDO1_VOUT + rid; |
234 | break; |
235 | case LP8725_ID_LDO1 ... LP8725_ID_BUCK1: |
236 | addr = LP872X_LDO1_VOUT + rid - LP8725_ID_BASE; |
237 | break; |
238 | case LP8725_ID_BUCK2: |
239 | addr = LP8725_BUCK2_VOUT1; |
240 | break; |
241 | default: |
242 | return -EINVAL; |
243 | } |
244 | |
245 | ret = lp872x_read_byte(lp, addr, &val); |
246 | if (ret) |
247 | return ret; |
248 | |
249 | val = (val & LP872X_START_DELAY_M) >> LP872X_START_DELAY_S; |
250 | |
251 | return val > MAX_DELAY ? 0 : val * time_step_us; |
252 | } |
253 | |
254 | static void lp872x_set_dvs(struct lp872x *lp, enum lp872x_dvs_sel dvs_sel, |
255 | int gpio) |
256 | { |
257 | enum lp872x_dvs_state state; |
258 | |
259 | state = dvs_sel == SEL_V1 ? DVS_HIGH : DVS_LOW; |
260 | gpio_set_value(gpio, state); |
261 | lp->dvs_pin = state; |
262 | } |
263 | |
264 | static u8 lp872x_select_buck_vout_addr(struct lp872x *lp, |
265 | enum lp872x_regulator_id buck) |
266 | { |
267 | u8 val, addr; |
268 | |
269 | if (lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val)) |
270 | return 0; |
271 | |
272 | switch (buck) { |
273 | case LP8720_ID_BUCK: |
274 | if (val & LP8720_EXT_DVS_M) { |
275 | addr = (lp->dvs_pin == DVS_HIGH) ? |
276 | LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2; |
277 | } else { |
278 | if (lp872x_read_byte(lp, LP8720_ENABLE, &val)) |
279 | return 0; |
280 | |
281 | addr = val & LP8720_DVS_SEL_M ? |
282 | LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2; |
283 | } |
284 | break; |
285 | case LP8725_ID_BUCK1: |
286 | if (val & LP8725_DVS1_M) |
287 | addr = LP8725_BUCK1_VOUT1; |
288 | else |
289 | addr = (lp->dvs_pin == DVS_HIGH) ? |
290 | LP8725_BUCK1_VOUT1 : LP8725_BUCK1_VOUT2; |
291 | break; |
292 | case LP8725_ID_BUCK2: |
293 | addr = val & LP8725_DVS2_M ? |
294 | LP8725_BUCK2_VOUT1 : LP8725_BUCK2_VOUT2; |
295 | break; |
296 | default: |
297 | return 0; |
298 | } |
299 | |
300 | return addr; |
301 | } |
302 | |
303 | static bool lp872x_is_valid_buck_addr(u8 addr) |
304 | { |
305 | switch (addr) { |
306 | case LP8720_BUCK_VOUT1: |
307 | case LP8720_BUCK_VOUT2: |
308 | case LP8725_BUCK1_VOUT1: |
309 | case LP8725_BUCK1_VOUT2: |
310 | case LP8725_BUCK2_VOUT1: |
311 | case LP8725_BUCK2_VOUT2: |
312 | return true; |
313 | default: |
314 | return false; |
315 | } |
316 | } |
317 | |
318 | static int lp872x_buck_set_voltage_sel(struct regulator_dev *rdev, |
319 | unsigned selector) |
320 | { |
321 | struct lp872x *lp = rdev_get_drvdata(rdev); |
322 | enum lp872x_regulator_id buck = rdev_get_id(rdev); |
323 | u8 addr, mask = LP872X_VOUT_M; |
324 | struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL; |
325 | |
326 | if (dvs && gpio_is_valid(dvs->gpio)) |
327 | lp872x_set_dvs(lp, dvs->vsel, dvs->gpio); |
328 | |
329 | addr = lp872x_select_buck_vout_addr(lp, buck); |
330 | if (!lp872x_is_valid_buck_addr(addr)) |
331 | return -EINVAL; |
332 | |
333 | return lp872x_update_bits(lp, addr, mask, selector); |
334 | } |
335 | |
336 | static int lp872x_buck_get_voltage_sel(struct regulator_dev *rdev) |
337 | { |
338 | struct lp872x *lp = rdev_get_drvdata(rdev); |
339 | enum lp872x_regulator_id buck = rdev_get_id(rdev); |
340 | u8 addr, val; |
341 | int ret; |
342 | |
343 | addr = lp872x_select_buck_vout_addr(lp, buck); |
344 | if (!lp872x_is_valid_buck_addr(addr)) |
345 | return -EINVAL; |
346 | |
347 | ret = lp872x_read_byte(lp, addr, &val); |
348 | if (ret) |
349 | return ret; |
350 | |
351 | return val & LP872X_VOUT_M; |
352 | } |
353 | |
354 | static int lp8725_buck_set_current_limit(struct regulator_dev *rdev, |
355 | int min_uA, int max_uA) |
356 | { |
357 | struct lp872x *lp = rdev_get_drvdata(rdev); |
358 | enum lp872x_regulator_id buck = rdev_get_id(rdev); |
359 | int i; |
360 | u8 addr; |
361 | |
362 | switch (buck) { |
363 | case LP8725_ID_BUCK1: |
364 | addr = LP8725_BUCK1_VOUT2; |
365 | break; |
366 | case LP8725_ID_BUCK2: |
367 | addr = LP8725_BUCK2_VOUT2; |
368 | break; |
369 | default: |
370 | return -EINVAL; |
371 | } |
372 | |
373 | for (i = ARRAY_SIZE(lp8725_buck_uA) - 1 ; i >= 0; i--) { |
374 | if (lp8725_buck_uA[i] >= min_uA && |
375 | lp8725_buck_uA[i] <= max_uA) |
376 | return lp872x_update_bits(lp, addr, |
377 | LP8725_BUCK_CL_M, |
378 | i << LP8725_BUCK_CL_S); |
379 | } |
380 | |
381 | return -EINVAL; |
382 | } |
383 | |
384 | static int lp8725_buck_get_current_limit(struct regulator_dev *rdev) |
385 | { |
386 | struct lp872x *lp = rdev_get_drvdata(rdev); |
387 | enum lp872x_regulator_id buck = rdev_get_id(rdev); |
388 | u8 addr, val; |
389 | int ret; |
390 | |
391 | switch (buck) { |
392 | case LP8725_ID_BUCK1: |
393 | addr = LP8725_BUCK1_VOUT2; |
394 | break; |
395 | case LP8725_ID_BUCK2: |
396 | addr = LP8725_BUCK2_VOUT2; |
397 | break; |
398 | default: |
399 | return -EINVAL; |
400 | } |
401 | |
402 | ret = lp872x_read_byte(lp, addr, &val); |
403 | if (ret) |
404 | return ret; |
405 | |
406 | val = (val & LP8725_BUCK_CL_M) >> LP8725_BUCK_CL_S; |
407 | |
408 | return (val < ARRAY_SIZE(lp8725_buck_uA)) ? |
409 | lp8725_buck_uA[val] : -EINVAL; |
410 | } |
411 | |
412 | static int lp872x_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) |
413 | { |
414 | struct lp872x *lp = rdev_get_drvdata(rdev); |
415 | enum lp872x_regulator_id buck = rdev_get_id(rdev); |
416 | u8 addr, mask, shift, val; |
417 | |
418 | switch (buck) { |
419 | case LP8720_ID_BUCK: |
420 | addr = LP8720_BUCK_VOUT2; |
421 | mask = LP8720_BUCK_FPWM_M; |
422 | shift = LP8720_BUCK_FPWM_S; |
423 | break; |
424 | case LP8725_ID_BUCK1: |
425 | addr = LP8725_BUCK_CTRL; |
426 | mask = LP8725_BUCK1_FPWM_M; |
427 | shift = LP8725_BUCK1_FPWM_S; |
428 | break; |
429 | case LP8725_ID_BUCK2: |
430 | addr = LP8725_BUCK_CTRL; |
431 | mask = LP8725_BUCK2_FPWM_M; |
432 | shift = LP8725_BUCK2_FPWM_S; |
433 | break; |
434 | default: |
435 | return -EINVAL; |
436 | } |
437 | |
438 | if (mode == REGULATOR_MODE_FAST) |
439 | val = LP872X_FORCE_PWM << shift; |
440 | else if (mode == REGULATOR_MODE_NORMAL) |
441 | val = LP872X_AUTO_PWM << shift; |
442 | else |
443 | return -EINVAL; |
444 | |
445 | return lp872x_update_bits(lp, addr, mask, val); |
446 | } |
447 | |
448 | static unsigned int lp872x_buck_get_mode(struct regulator_dev *rdev) |
449 | { |
450 | struct lp872x *lp = rdev_get_drvdata(rdev); |
451 | enum lp872x_regulator_id buck = rdev_get_id(rdev); |
452 | u8 addr, mask, val; |
453 | int ret; |
454 | |
455 | switch (buck) { |
456 | case LP8720_ID_BUCK: |
457 | addr = LP8720_BUCK_VOUT2; |
458 | mask = LP8720_BUCK_FPWM_M; |
459 | break; |
460 | case LP8725_ID_BUCK1: |
461 | addr = LP8725_BUCK_CTRL; |
462 | mask = LP8725_BUCK1_FPWM_M; |
463 | break; |
464 | case LP8725_ID_BUCK2: |
465 | addr = LP8725_BUCK_CTRL; |
466 | mask = LP8725_BUCK2_FPWM_M; |
467 | break; |
468 | default: |
469 | return -EINVAL; |
470 | } |
471 | |
472 | ret = lp872x_read_byte(lp, addr, &val); |
473 | if (ret) |
474 | return ret; |
475 | |
476 | return val & mask ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL; |
477 | } |
478 | |
479 | static struct regulator_ops lp872x_ldo_ops = { |
480 | .list_voltage = regulator_list_voltage_table, |
481 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
482 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
483 | .enable = regulator_enable_regmap, |
484 | .disable = regulator_disable_regmap, |
485 | .is_enabled = regulator_is_enabled_regmap, |
486 | .enable_time = lp872x_regulator_enable_time, |
487 | }; |
488 | |
489 | static struct regulator_ops lp8720_buck_ops = { |
490 | .list_voltage = regulator_list_voltage_table, |
491 | .set_voltage_sel = lp872x_buck_set_voltage_sel, |
492 | .get_voltage_sel = lp872x_buck_get_voltage_sel, |
493 | .enable = regulator_enable_regmap, |
494 | .disable = regulator_disable_regmap, |
495 | .is_enabled = regulator_is_enabled_regmap, |
496 | .enable_time = lp872x_regulator_enable_time, |
497 | .set_mode = lp872x_buck_set_mode, |
498 | .get_mode = lp872x_buck_get_mode, |
499 | }; |
500 | |
501 | static struct regulator_ops lp8725_buck_ops = { |
502 | .list_voltage = regulator_list_voltage_table, |
503 | .set_voltage_sel = lp872x_buck_set_voltage_sel, |
504 | .get_voltage_sel = lp872x_buck_get_voltage_sel, |
505 | .enable = regulator_enable_regmap, |
506 | .disable = regulator_disable_regmap, |
507 | .is_enabled = regulator_is_enabled_regmap, |
508 | .enable_time = lp872x_regulator_enable_time, |
509 | .set_mode = lp872x_buck_set_mode, |
510 | .get_mode = lp872x_buck_get_mode, |
511 | .set_current_limit = lp8725_buck_set_current_limit, |
512 | .get_current_limit = lp8725_buck_get_current_limit, |
513 | }; |
514 | |
515 | static struct regulator_desc lp8720_regulator_desc[] = { |
516 | { |
517 | .name = "ldo1", |
518 | .id = LP8720_ID_LDO1, |
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_LDO1_VOUT, |
525 | .vsel_mask = LP872X_VOUT_M, |
526 | .enable_reg = LP8720_ENABLE, |
527 | .enable_mask = LP872X_EN_LDO1_M, |
528 | }, |
529 | { |
530 | .name = "ldo2", |
531 | .id = LP8720_ID_LDO2, |
532 | .ops = &lp872x_ldo_ops, |
533 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
534 | .volt_table = lp872x_ldo_vtbl, |
535 | .type = REGULATOR_VOLTAGE, |
536 | .owner = THIS_MODULE, |
537 | .vsel_reg = LP872X_LDO2_VOUT, |
538 | .vsel_mask = LP872X_VOUT_M, |
539 | .enable_reg = LP8720_ENABLE, |
540 | .enable_mask = LP872X_EN_LDO2_M, |
541 | }, |
542 | { |
543 | .name = "ldo3", |
544 | .id = LP8720_ID_LDO3, |
545 | .ops = &lp872x_ldo_ops, |
546 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
547 | .volt_table = lp872x_ldo_vtbl, |
548 | .type = REGULATOR_VOLTAGE, |
549 | .owner = THIS_MODULE, |
550 | .vsel_reg = LP872X_LDO3_VOUT, |
551 | .vsel_mask = LP872X_VOUT_M, |
552 | .enable_reg = LP8720_ENABLE, |
553 | .enable_mask = LP872X_EN_LDO3_M, |
554 | }, |
555 | { |
556 | .name = "ldo4", |
557 | .id = LP8720_ID_LDO4, |
558 | .ops = &lp872x_ldo_ops, |
559 | .n_voltages = ARRAY_SIZE(lp8720_ldo4_vtbl), |
560 | .volt_table = lp8720_ldo4_vtbl, |
561 | .type = REGULATOR_VOLTAGE, |
562 | .owner = THIS_MODULE, |
563 | .vsel_reg = LP872X_LDO4_VOUT, |
564 | .vsel_mask = LP872X_VOUT_M, |
565 | .enable_reg = LP8720_ENABLE, |
566 | .enable_mask = LP872X_EN_LDO4_M, |
567 | }, |
568 | { |
569 | .name = "ldo5", |
570 | .id = LP8720_ID_LDO5, |
571 | .ops = &lp872x_ldo_ops, |
572 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
573 | .volt_table = lp872x_ldo_vtbl, |
574 | .type = REGULATOR_VOLTAGE, |
575 | .owner = THIS_MODULE, |
576 | .vsel_reg = LP872X_LDO5_VOUT, |
577 | .vsel_mask = LP872X_VOUT_M, |
578 | .enable_reg = LP8720_ENABLE, |
579 | .enable_mask = LP872X_EN_LDO5_M, |
580 | }, |
581 | { |
582 | .name = "buck", |
583 | .id = LP8720_ID_BUCK, |
584 | .ops = &lp8720_buck_ops, |
585 | .n_voltages = ARRAY_SIZE(lp8720_buck_vtbl), |
586 | .volt_table = lp8720_buck_vtbl, |
587 | .type = REGULATOR_VOLTAGE, |
588 | .owner = THIS_MODULE, |
589 | .enable_reg = LP8720_ENABLE, |
590 | .enable_mask = LP8720_EN_BUCK_M, |
591 | }, |
592 | }; |
593 | |
594 | static struct regulator_desc lp8725_regulator_desc[] = { |
595 | { |
596 | .name = "ldo1", |
597 | .id = LP8725_ID_LDO1, |
598 | .ops = &lp872x_ldo_ops, |
599 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
600 | .volt_table = lp872x_ldo_vtbl, |
601 | .type = REGULATOR_VOLTAGE, |
602 | .owner = THIS_MODULE, |
603 | .vsel_reg = LP872X_LDO1_VOUT, |
604 | .vsel_mask = LP872X_VOUT_M, |
605 | .enable_reg = LP8725_LDO_CTRL, |
606 | .enable_mask = LP872X_EN_LDO1_M, |
607 | }, |
608 | { |
609 | .name = "ldo2", |
610 | .id = LP8725_ID_LDO2, |
611 | .ops = &lp872x_ldo_ops, |
612 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
613 | .volt_table = lp872x_ldo_vtbl, |
614 | .type = REGULATOR_VOLTAGE, |
615 | .owner = THIS_MODULE, |
616 | .vsel_reg = LP872X_LDO2_VOUT, |
617 | .vsel_mask = LP872X_VOUT_M, |
618 | .enable_reg = LP8725_LDO_CTRL, |
619 | .enable_mask = LP872X_EN_LDO2_M, |
620 | }, |
621 | { |
622 | .name = "ldo3", |
623 | .id = LP8725_ID_LDO3, |
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_LDO3_VOUT, |
630 | .vsel_mask = LP872X_VOUT_M, |
631 | .enable_reg = LP8725_LDO_CTRL, |
632 | .enable_mask = LP872X_EN_LDO3_M, |
633 | }, |
634 | { |
635 | .name = "ldo4", |
636 | .id = LP8725_ID_LDO4, |
637 | .ops = &lp872x_ldo_ops, |
638 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
639 | .volt_table = lp872x_ldo_vtbl, |
640 | .type = REGULATOR_VOLTAGE, |
641 | .owner = THIS_MODULE, |
642 | .vsel_reg = LP872X_LDO4_VOUT, |
643 | .vsel_mask = LP872X_VOUT_M, |
644 | .enable_reg = LP8725_LDO_CTRL, |
645 | .enable_mask = LP872X_EN_LDO4_M, |
646 | }, |
647 | { |
648 | .name = "ldo5", |
649 | .id = LP8725_ID_LDO5, |
650 | .ops = &lp872x_ldo_ops, |
651 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
652 | .volt_table = lp872x_ldo_vtbl, |
653 | .type = REGULATOR_VOLTAGE, |
654 | .owner = THIS_MODULE, |
655 | .vsel_reg = LP872X_LDO5_VOUT, |
656 | .vsel_mask = LP872X_VOUT_M, |
657 | .enable_reg = LP8725_LDO_CTRL, |
658 | .enable_mask = LP872X_EN_LDO5_M, |
659 | }, |
660 | { |
661 | .name = "lilo1", |
662 | .id = LP8725_ID_LILO1, |
663 | .ops = &lp872x_ldo_ops, |
664 | .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl), |
665 | .volt_table = lp8725_lilo_vtbl, |
666 | .type = REGULATOR_VOLTAGE, |
667 | .owner = THIS_MODULE, |
668 | .vsel_reg = LP8725_LILO1_VOUT, |
669 | .vsel_mask = LP872X_VOUT_M, |
670 | .enable_reg = LP8725_LDO_CTRL, |
671 | .enable_mask = LP8725_EN_LILO1_M, |
672 | }, |
673 | { |
674 | .name = "lilo2", |
675 | .id = LP8725_ID_LILO2, |
676 | .ops = &lp872x_ldo_ops, |
677 | .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl), |
678 | .volt_table = lp8725_lilo_vtbl, |
679 | .type = REGULATOR_VOLTAGE, |
680 | .owner = THIS_MODULE, |
681 | .vsel_reg = LP8725_LILO2_VOUT, |
682 | .vsel_mask = LP872X_VOUT_M, |
683 | .enable_reg = LP8725_LDO_CTRL, |
684 | .enable_mask = LP8725_EN_LILO2_M, |
685 | }, |
686 | { |
687 | .name = "buck1", |
688 | .id = LP8725_ID_BUCK1, |
689 | .ops = &lp8725_buck_ops, |
690 | .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl), |
691 | .volt_table = lp8725_buck_vtbl, |
692 | .type = REGULATOR_VOLTAGE, |
693 | .owner = THIS_MODULE, |
694 | .enable_reg = LP872X_GENERAL_CFG, |
695 | .enable_mask = LP8725_BUCK1_EN_M, |
696 | }, |
697 | { |
698 | .name = "buck2", |
699 | .id = LP8725_ID_BUCK2, |
700 | .ops = &lp8725_buck_ops, |
701 | .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl), |
702 | .volt_table = lp8725_buck_vtbl, |
703 | .type = REGULATOR_VOLTAGE, |
704 | .owner = THIS_MODULE, |
705 | .enable_reg = LP872X_GENERAL_CFG, |
706 | .enable_mask = LP8725_BUCK2_EN_M, |
707 | }, |
708 | }; |
709 | |
710 | static int lp872x_init_dvs(struct lp872x *lp) |
711 | { |
712 | int ret, gpio; |
713 | struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL; |
714 | enum lp872x_dvs_state pinstate; |
715 | u8 mask[] = { LP8720_EXT_DVS_M, LP8725_DVS1_M | LP8725_DVS2_M }; |
716 | u8 default_dvs_mode[] = { LP8720_DEFAULT_DVS, LP8725_DEFAULT_DVS }; |
717 | |
718 | if (!dvs) |
719 | goto set_default_dvs_mode; |
720 | |
721 | gpio = dvs->gpio; |
722 | if (!gpio_is_valid(gpio)) { |
723 | dev_err(lp->dev, "invalid gpio: %d\n", gpio); |
724 | return -EINVAL; |
725 | } |
726 | |
727 | pinstate = dvs->init_state; |
728 | ret = devm_gpio_request_one(lp->dev, gpio, pinstate, "LP872X DVS"); |
729 | if (ret) { |
730 | dev_err(lp->dev, "gpio request err: %d\n", ret); |
731 | return ret; |
732 | } |
733 | |
734 | lp->dvs_pin = pinstate; |
735 | lp->dvs_gpio = gpio; |
736 | |
737 | return 0; |
738 | |
739 | set_default_dvs_mode: |
740 | return lp872x_update_bits(lp, LP872X_GENERAL_CFG, mask[lp->chipid], |
741 | default_dvs_mode[lp->chipid]); |
742 | } |
743 | |
744 | static int lp872x_config(struct lp872x *lp) |
745 | { |
746 | struct lp872x_platform_data *pdata = lp->pdata; |
747 | int ret; |
748 | |
749 | if (!pdata || !pdata->update_config) |
750 | goto init_dvs; |
751 | |
752 | ret = lp872x_write_byte(lp, LP872X_GENERAL_CFG, pdata->general_config); |
753 | if (ret) |
754 | return ret; |
755 | |
756 | init_dvs: |
757 | return lp872x_init_dvs(lp); |
758 | } |
759 | |
760 | static struct regulator_init_data |
761 | *lp872x_find_regulator_init_data(int id, struct lp872x *lp) |
762 | { |
763 | struct lp872x_platform_data *pdata = lp->pdata; |
764 | int i; |
765 | |
766 | if (!pdata) |
767 | return NULL; |
768 | |
769 | for (i = 0; i < lp->num_regulators; i++) { |
770 | if (pdata->regulator_data[i].id == id) |
771 | return pdata->regulator_data[i].init_data; |
772 | } |
773 | |
774 | return NULL; |
775 | } |
776 | |
777 | static int lp872x_regulator_register(struct lp872x *lp) |
778 | { |
779 | struct regulator_desc *desc; |
780 | struct regulator_config cfg = { }; |
781 | struct regulator_dev *rdev; |
782 | int i, ret; |
783 | |
784 | for (i = 0 ; i < lp->num_regulators ; i++) { |
785 | desc = (lp->chipid == LP8720) ? &lp8720_regulator_desc[i] : |
786 | &lp8725_regulator_desc[i]; |
787 | |
788 | cfg.dev = lp->dev; |
789 | cfg.init_data = lp872x_find_regulator_init_data(desc->id, lp); |
790 | cfg.driver_data = lp; |
791 | cfg.regmap = lp->regmap; |
792 | |
793 | rdev = regulator_register(desc, &cfg); |
794 | if (IS_ERR(rdev)) { |
795 | dev_err(lp->dev, "regulator register err"); |
796 | ret = PTR_ERR(rdev); |
797 | goto err; |
798 | } |
799 | |
800 | *(lp->regulators + i) = rdev; |
801 | } |
802 | |
803 | return 0; |
804 | err: |
805 | while (--i >= 0) { |
806 | rdev = *(lp->regulators + i); |
807 | regulator_unregister(rdev); |
808 | } |
809 | return ret; |
810 | } |
811 | |
812 | static void lp872x_regulator_unregister(struct lp872x *lp) |
813 | { |
814 | struct regulator_dev *rdev; |
815 | int i; |
816 | |
817 | for (i = 0 ; i < lp->num_regulators ; i++) { |
818 | rdev = *(lp->regulators + i); |
819 | regulator_unregister(rdev); |
820 | } |
821 | } |
822 | |
823 | static const struct regmap_config lp872x_regmap_config = { |
824 | .reg_bits = 8, |
825 | .val_bits = 8, |
826 | .max_register = MAX_REGISTERS, |
827 | }; |
828 | |
829 | static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id) |
830 | { |
831 | struct lp872x *lp; |
832 | int ret, size, num_regulators; |
833 | const int lp872x_num_regulators[] = { |
834 | [LP8720] = LP8720_NUM_REGULATORS, |
835 | [LP8725] = LP8725_NUM_REGULATORS, |
836 | }; |
837 | |
838 | lp = devm_kzalloc(&cl->dev, sizeof(struct lp872x), GFP_KERNEL); |
839 | if (!lp) |
840 | goto err_mem; |
841 | |
842 | num_regulators = lp872x_num_regulators[id->driver_data]; |
843 | size = sizeof(struct regulator_dev *) * num_regulators; |
844 | |
845 | lp->regulators = devm_kzalloc(&cl->dev, size, GFP_KERNEL); |
846 | if (!lp->regulators) |
847 | goto err_mem; |
848 | |
849 | lp->regmap = devm_regmap_init_i2c(cl, &lp872x_regmap_config); |
850 | if (IS_ERR(lp->regmap)) { |
851 | ret = PTR_ERR(lp->regmap); |
852 | dev_err(&cl->dev, "regmap init i2c err: %d\n", ret); |
853 | goto err_dev; |
854 | } |
855 | |
856 | lp->dev = &cl->dev; |
857 | lp->pdata = cl->dev.platform_data; |
858 | lp->chipid = id->driver_data; |
859 | lp->num_regulators = num_regulators; |
860 | i2c_set_clientdata(cl, lp); |
861 | |
862 | ret = lp872x_config(lp); |
863 | if (ret) |
864 | goto err_dev; |
865 | |
866 | return lp872x_regulator_register(lp); |
867 | |
868 | err_mem: |
869 | return -ENOMEM; |
870 | err_dev: |
871 | return ret; |
872 | } |
873 | |
874 | static int lp872x_remove(struct i2c_client *cl) |
875 | { |
876 | struct lp872x *lp = i2c_get_clientdata(cl); |
877 | |
878 | lp872x_regulator_unregister(lp); |
879 | return 0; |
880 | } |
881 | |
882 | static const struct i2c_device_id lp872x_ids[] = { |
883 | {"lp8720", LP8720}, |
884 | {"lp8725", LP8725}, |
885 | { } |
886 | }; |
887 | MODULE_DEVICE_TABLE(i2c, lp872x_ids); |
888 | |
889 | static struct i2c_driver lp872x_driver = { |
890 | .driver = { |
891 | .name = "lp872x", |
892 | .owner = THIS_MODULE, |
893 | }, |
894 | .probe = lp872x_probe, |
895 | .remove = lp872x_remove, |
896 | .id_table = lp872x_ids, |
897 | }; |
898 | |
899 | module_i2c_driver(lp872x_driver); |
900 | |
901 | MODULE_DESCRIPTION("TI/National Semiconductor LP872x PMU Regulator Driver"); |
902 | MODULE_AUTHOR("Milo Kim"); |
903 | MODULE_LICENSE("GPL"); |
904 |
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