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af8b5fc3 KM |
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 | ||
b158fba6 KM |
89 | /* Default DVS Mode */ |
90 | #define LP8720_DEFAULT_DVS 0 | |
91 | #define LP8725_DEFAULT_DVS BIT(2) | |
92 | ||
af8b5fc3 KM |
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 | ||
af8b5fc3 KM |
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); | |
2c129927 | 223 | enum lp872x_regulator_id rid = rdev_get_id(rdev); |
af8b5fc3 | 224 | int time_step_us = lp872x_get_timestep_usec(lp); |
2c129927 | 225 | int ret; |
af8b5fc3 KM |
226 | u8 addr, val; |
227 | ||
228 | if (time_step_us < 0) | |
229 | return -EINVAL; | |
230 | ||
2c129927 AL |
231 | switch (rid) { |
232 | case LP8720_ID_LDO1 ... LP8720_ID_BUCK: | |
233 | addr = LP872X_LDO1_VOUT + rid; | |
af8b5fc3 | 234 | break; |
2c129927 AL |
235 | case LP8725_ID_LDO1 ... LP8725_ID_BUCK1: |
236 | addr = LP872X_LDO1_VOUT + rid - LP8725_ID_BASE; | |
af8b5fc3 KM |
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 | ||
9d6da6fc KM |
254 | static void lp872x_set_dvs(struct lp872x *lp, enum lp872x_dvs_sel dvs_sel, |
255 | int gpio) | |
af8b5fc3 | 256 | { |
af8b5fc3 KM |
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; | |
9d6da6fc | 324 | struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL; |
af8b5fc3 KM |
325 | |
326 | if (dvs && gpio_is_valid(dvs->gpio)) | |
9d6da6fc | 327 | lp872x_set_dvs(lp, dvs->vsel, dvs->gpio); |
af8b5fc3 KM |
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); | |
4e1d67ed AL |
359 | int i; |
360 | u8 addr; | |
af8b5fc3 KM |
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 | ||
4e1d67ed | 373 | for (i = ARRAY_SIZE(lp8725_buck_uA) - 1 ; i >= 0; i--) { |
af8b5fc3 KM |
374 | if (lp8725_buck_uA[i] >= min_uA && |
375 | lp8725_buck_uA[i] <= max_uA) | |
4e1d67ed AL |
376 | return lp872x_update_bits(lp, addr, |
377 | LP8725_BUCK_CL_M, | |
378 | i << LP8725_BUCK_CL_S); | |
379 | } | |
af8b5fc3 | 380 | |
4e1d67ed | 381 | return -EINVAL; |
af8b5fc3 KM |
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, | |
a32f9e02 | 481 | .map_voltage = regulator_map_voltage_ascend, |
af8b5fc3 KM |
482 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
483 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
484 | .enable = regulator_enable_regmap, | |
485 | .disable = regulator_disable_regmap, | |
486 | .is_enabled = regulator_is_enabled_regmap, | |
487 | .enable_time = lp872x_regulator_enable_time, | |
488 | }; | |
489 | ||
490 | static struct regulator_ops lp8720_buck_ops = { | |
491 | .list_voltage = regulator_list_voltage_table, | |
a32f9e02 | 492 | .map_voltage = regulator_map_voltage_ascend, |
af8b5fc3 KM |
493 | .set_voltage_sel = lp872x_buck_set_voltage_sel, |
494 | .get_voltage_sel = lp872x_buck_get_voltage_sel, | |
495 | .enable = regulator_enable_regmap, | |
496 | .disable = regulator_disable_regmap, | |
497 | .is_enabled = regulator_is_enabled_regmap, | |
498 | .enable_time = lp872x_regulator_enable_time, | |
499 | .set_mode = lp872x_buck_set_mode, | |
500 | .get_mode = lp872x_buck_get_mode, | |
501 | }; | |
502 | ||
503 | static struct regulator_ops lp8725_buck_ops = { | |
504 | .list_voltage = regulator_list_voltage_table, | |
a32f9e02 | 505 | .map_voltage = regulator_map_voltage_ascend, |
af8b5fc3 KM |
506 | .set_voltage_sel = lp872x_buck_set_voltage_sel, |
507 | .get_voltage_sel = lp872x_buck_get_voltage_sel, | |
508 | .enable = regulator_enable_regmap, | |
509 | .disable = regulator_disable_regmap, | |
510 | .is_enabled = regulator_is_enabled_regmap, | |
511 | .enable_time = lp872x_regulator_enable_time, | |
512 | .set_mode = lp872x_buck_set_mode, | |
513 | .get_mode = lp872x_buck_get_mode, | |
514 | .set_current_limit = lp8725_buck_set_current_limit, | |
515 | .get_current_limit = lp8725_buck_get_current_limit, | |
516 | }; | |
517 | ||
518 | static struct regulator_desc lp8720_regulator_desc[] = { | |
519 | { | |
520 | .name = "ldo1", | |
521 | .id = LP8720_ID_LDO1, | |
522 | .ops = &lp872x_ldo_ops, | |
523 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), | |
524 | .volt_table = lp872x_ldo_vtbl, | |
525 | .type = REGULATOR_VOLTAGE, | |
526 | .owner = THIS_MODULE, | |
527 | .vsel_reg = LP872X_LDO1_VOUT, | |
528 | .vsel_mask = LP872X_VOUT_M, | |
529 | .enable_reg = LP8720_ENABLE, | |
530 | .enable_mask = LP872X_EN_LDO1_M, | |
531 | }, | |
532 | { | |
533 | .name = "ldo2", | |
534 | .id = LP8720_ID_LDO2, | |
535 | .ops = &lp872x_ldo_ops, | |
536 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), | |
537 | .volt_table = lp872x_ldo_vtbl, | |
538 | .type = REGULATOR_VOLTAGE, | |
539 | .owner = THIS_MODULE, | |
540 | .vsel_reg = LP872X_LDO2_VOUT, | |
541 | .vsel_mask = LP872X_VOUT_M, | |
542 | .enable_reg = LP8720_ENABLE, | |
543 | .enable_mask = LP872X_EN_LDO2_M, | |
544 | }, | |
545 | { | |
546 | .name = "ldo3", | |
547 | .id = LP8720_ID_LDO3, | |
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_LDO3_VOUT, | |
554 | .vsel_mask = LP872X_VOUT_M, | |
555 | .enable_reg = LP8720_ENABLE, | |
556 | .enable_mask = LP872X_EN_LDO3_M, | |
557 | }, | |
558 | { | |
559 | .name = "ldo4", | |
560 | .id = LP8720_ID_LDO4, | |
561 | .ops = &lp872x_ldo_ops, | |
562 | .n_voltages = ARRAY_SIZE(lp8720_ldo4_vtbl), | |
563 | .volt_table = lp8720_ldo4_vtbl, | |
564 | .type = REGULATOR_VOLTAGE, | |
565 | .owner = THIS_MODULE, | |
566 | .vsel_reg = LP872X_LDO4_VOUT, | |
567 | .vsel_mask = LP872X_VOUT_M, | |
568 | .enable_reg = LP8720_ENABLE, | |
569 | .enable_mask = LP872X_EN_LDO4_M, | |
570 | }, | |
571 | { | |
572 | .name = "ldo5", | |
573 | .id = LP8720_ID_LDO5, | |
574 | .ops = &lp872x_ldo_ops, | |
575 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), | |
576 | .volt_table = lp872x_ldo_vtbl, | |
577 | .type = REGULATOR_VOLTAGE, | |
578 | .owner = THIS_MODULE, | |
579 | .vsel_reg = LP872X_LDO5_VOUT, | |
580 | .vsel_mask = LP872X_VOUT_M, | |
581 | .enable_reg = LP8720_ENABLE, | |
582 | .enable_mask = LP872X_EN_LDO5_M, | |
583 | }, | |
584 | { | |
585 | .name = "buck", | |
586 | .id = LP8720_ID_BUCK, | |
587 | .ops = &lp8720_buck_ops, | |
588 | .n_voltages = ARRAY_SIZE(lp8720_buck_vtbl), | |
589 | .volt_table = lp8720_buck_vtbl, | |
590 | .type = REGULATOR_VOLTAGE, | |
591 | .owner = THIS_MODULE, | |
592 | .enable_reg = LP8720_ENABLE, | |
593 | .enable_mask = LP8720_EN_BUCK_M, | |
594 | }, | |
595 | }; | |
596 | ||
597 | static struct regulator_desc lp8725_regulator_desc[] = { | |
598 | { | |
599 | .name = "ldo1", | |
600 | .id = LP8725_ID_LDO1, | |
601 | .ops = &lp872x_ldo_ops, | |
602 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), | |
603 | .volt_table = lp872x_ldo_vtbl, | |
604 | .type = REGULATOR_VOLTAGE, | |
605 | .owner = THIS_MODULE, | |
606 | .vsel_reg = LP872X_LDO1_VOUT, | |
607 | .vsel_mask = LP872X_VOUT_M, | |
608 | .enable_reg = LP8725_LDO_CTRL, | |
609 | .enable_mask = LP872X_EN_LDO1_M, | |
610 | }, | |
611 | { | |
612 | .name = "ldo2", | |
613 | .id = LP8725_ID_LDO2, | |
614 | .ops = &lp872x_ldo_ops, | |
615 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), | |
616 | .volt_table = lp872x_ldo_vtbl, | |
617 | .type = REGULATOR_VOLTAGE, | |
618 | .owner = THIS_MODULE, | |
619 | .vsel_reg = LP872X_LDO2_VOUT, | |
620 | .vsel_mask = LP872X_VOUT_M, | |
621 | .enable_reg = LP8725_LDO_CTRL, | |
622 | .enable_mask = LP872X_EN_LDO2_M, | |
623 | }, | |
624 | { | |
625 | .name = "ldo3", | |
626 | .id = LP8725_ID_LDO3, | |
627 | .ops = &lp872x_ldo_ops, | |
628 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), | |
629 | .volt_table = lp872x_ldo_vtbl, | |
630 | .type = REGULATOR_VOLTAGE, | |
631 | .owner = THIS_MODULE, | |
632 | .vsel_reg = LP872X_LDO3_VOUT, | |
633 | .vsel_mask = LP872X_VOUT_M, | |
634 | .enable_reg = LP8725_LDO_CTRL, | |
635 | .enable_mask = LP872X_EN_LDO3_M, | |
636 | }, | |
637 | { | |
638 | .name = "ldo4", | |
639 | .id = LP8725_ID_LDO4, | |
640 | .ops = &lp872x_ldo_ops, | |
641 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), | |
642 | .volt_table = lp872x_ldo_vtbl, | |
643 | .type = REGULATOR_VOLTAGE, | |
644 | .owner = THIS_MODULE, | |
645 | .vsel_reg = LP872X_LDO4_VOUT, | |
646 | .vsel_mask = LP872X_VOUT_M, | |
647 | .enable_reg = LP8725_LDO_CTRL, | |
648 | .enable_mask = LP872X_EN_LDO4_M, | |
649 | }, | |
650 | { | |
651 | .name = "ldo5", | |
652 | .id = LP8725_ID_LDO5, | |
653 | .ops = &lp872x_ldo_ops, | |
654 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), | |
655 | .volt_table = lp872x_ldo_vtbl, | |
656 | .type = REGULATOR_VOLTAGE, | |
657 | .owner = THIS_MODULE, | |
658 | .vsel_reg = LP872X_LDO5_VOUT, | |
659 | .vsel_mask = LP872X_VOUT_M, | |
660 | .enable_reg = LP8725_LDO_CTRL, | |
661 | .enable_mask = LP872X_EN_LDO5_M, | |
662 | }, | |
663 | { | |
664 | .name = "lilo1", | |
665 | .id = LP8725_ID_LILO1, | |
666 | .ops = &lp872x_ldo_ops, | |
667 | .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl), | |
668 | .volt_table = lp8725_lilo_vtbl, | |
669 | .type = REGULATOR_VOLTAGE, | |
670 | .owner = THIS_MODULE, | |
671 | .vsel_reg = LP8725_LILO1_VOUT, | |
672 | .vsel_mask = LP872X_VOUT_M, | |
673 | .enable_reg = LP8725_LDO_CTRL, | |
674 | .enable_mask = LP8725_EN_LILO1_M, | |
675 | }, | |
676 | { | |
677 | .name = "lilo2", | |
678 | .id = LP8725_ID_LILO2, | |
679 | .ops = &lp872x_ldo_ops, | |
680 | .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl), | |
681 | .volt_table = lp8725_lilo_vtbl, | |
682 | .type = REGULATOR_VOLTAGE, | |
683 | .owner = THIS_MODULE, | |
684 | .vsel_reg = LP8725_LILO2_VOUT, | |
685 | .vsel_mask = LP872X_VOUT_M, | |
686 | .enable_reg = LP8725_LDO_CTRL, | |
687 | .enable_mask = LP8725_EN_LILO2_M, | |
688 | }, | |
689 | { | |
690 | .name = "buck1", | |
691 | .id = LP8725_ID_BUCK1, | |
692 | .ops = &lp8725_buck_ops, | |
693 | .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl), | |
694 | .volt_table = lp8725_buck_vtbl, | |
695 | .type = REGULATOR_VOLTAGE, | |
696 | .owner = THIS_MODULE, | |
697 | .enable_reg = LP872X_GENERAL_CFG, | |
698 | .enable_mask = LP8725_BUCK1_EN_M, | |
699 | }, | |
700 | { | |
701 | .name = "buck2", | |
702 | .id = LP8725_ID_BUCK2, | |
703 | .ops = &lp8725_buck_ops, | |
704 | .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl), | |
705 | .volt_table = lp8725_buck_vtbl, | |
706 | .type = REGULATOR_VOLTAGE, | |
707 | .owner = THIS_MODULE, | |
708 | .enable_reg = LP872X_GENERAL_CFG, | |
709 | .enable_mask = LP8725_BUCK2_EN_M, | |
710 | }, | |
711 | }; | |
712 | ||
af8b5fc3 KM |
713 | static int lp872x_init_dvs(struct lp872x *lp) |
714 | { | |
715 | int ret, gpio; | |
b158fba6 | 716 | struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL; |
af8b5fc3 | 717 | enum lp872x_dvs_state pinstate; |
b158fba6 KM |
718 | u8 mask[] = { LP8720_EXT_DVS_M, LP8725_DVS1_M | LP8725_DVS2_M }; |
719 | u8 default_dvs_mode[] = { LP8720_DEFAULT_DVS, LP8725_DEFAULT_DVS }; | |
720 | ||
721 | if (!dvs) | |
722 | goto set_default_dvs_mode; | |
af8b5fc3 | 723 | |
af8b5fc3 KM |
724 | gpio = dvs->gpio; |
725 | if (!gpio_is_valid(gpio)) { | |
726 | dev_err(lp->dev, "invalid gpio: %d\n", gpio); | |
727 | return -EINVAL; | |
728 | } | |
729 | ||
730 | pinstate = dvs->init_state; | |
731 | ret = devm_gpio_request_one(lp->dev, gpio, pinstate, "LP872X DVS"); | |
732 | if (ret) { | |
733 | dev_err(lp->dev, "gpio request err: %d\n", ret); | |
734 | return ret; | |
735 | } | |
736 | ||
737 | lp->dvs_pin = pinstate; | |
738 | lp->dvs_gpio = gpio; | |
739 | ||
740 | return 0; | |
b158fba6 KM |
741 | |
742 | set_default_dvs_mode: | |
743 | return lp872x_update_bits(lp, LP872X_GENERAL_CFG, mask[lp->chipid], | |
744 | default_dvs_mode[lp->chipid]); | |
af8b5fc3 KM |
745 | } |
746 | ||
747 | static int lp872x_config(struct lp872x *lp) | |
748 | { | |
749 | struct lp872x_platform_data *pdata = lp->pdata; | |
750 | int ret; | |
751 | ||
86b3fef0 KM |
752 | if (!pdata || !pdata->update_config) |
753 | goto init_dvs; | |
af8b5fc3 KM |
754 | |
755 | ret = lp872x_write_byte(lp, LP872X_GENERAL_CFG, pdata->general_config); | |
756 | if (ret) | |
757 | return ret; | |
758 | ||
86b3fef0 | 759 | init_dvs: |
af8b5fc3 KM |
760 | return lp872x_init_dvs(lp); |
761 | } | |
762 | ||
763 | static struct regulator_init_data | |
5bae0628 | 764 | *lp872x_find_regulator_init_data(int id, struct lp872x *lp) |
af8b5fc3 | 765 | { |
9ffaa868 | 766 | struct lp872x_platform_data *pdata = lp->pdata; |
5bae0628 | 767 | int i; |
af8b5fc3 | 768 | |
9ffaa868 KM |
769 | if (!pdata) |
770 | return NULL; | |
771 | ||
5bae0628 | 772 | for (i = 0; i < lp->num_regulators; i++) { |
9ffaa868 KM |
773 | if (pdata->regulator_data[i].id == id) |
774 | return pdata->regulator_data[i].init_data; | |
5bae0628 | 775 | } |
af8b5fc3 | 776 | |
5bae0628 | 777 | return NULL; |
af8b5fc3 KM |
778 | } |
779 | ||
780 | static int lp872x_regulator_register(struct lp872x *lp) | |
781 | { | |
782 | struct regulator_desc *desc; | |
783 | struct regulator_config cfg = { }; | |
784 | struct regulator_dev *rdev; | |
785 | int i, ret; | |
786 | ||
787 | for (i = 0 ; i < lp->num_regulators ; i++) { | |
788 | desc = (lp->chipid == LP8720) ? &lp8720_regulator_desc[i] : | |
789 | &lp8725_regulator_desc[i]; | |
790 | ||
791 | cfg.dev = lp->dev; | |
5bae0628 | 792 | cfg.init_data = lp872x_find_regulator_init_data(desc->id, lp); |
af8b5fc3 KM |
793 | cfg.driver_data = lp; |
794 | cfg.regmap = lp->regmap; | |
795 | ||
796 | rdev = regulator_register(desc, &cfg); | |
797 | if (IS_ERR(rdev)) { | |
798 | dev_err(lp->dev, "regulator register err"); | |
799 | ret = PTR_ERR(rdev); | |
800 | goto err; | |
801 | } | |
802 | ||
803 | *(lp->regulators + i) = rdev; | |
804 | } | |
805 | ||
806 | return 0; | |
807 | err: | |
808 | while (--i >= 0) { | |
809 | rdev = *(lp->regulators + i); | |
810 | regulator_unregister(rdev); | |
811 | } | |
812 | return ret; | |
813 | } | |
814 | ||
815 | static void lp872x_regulator_unregister(struct lp872x *lp) | |
816 | { | |
817 | struct regulator_dev *rdev; | |
818 | int i; | |
819 | ||
820 | for (i = 0 ; i < lp->num_regulators ; i++) { | |
821 | rdev = *(lp->regulators + i); | |
822 | regulator_unregister(rdev); | |
823 | } | |
824 | } | |
825 | ||
826 | static const struct regmap_config lp872x_regmap_config = { | |
827 | .reg_bits = 8, | |
828 | .val_bits = 8, | |
829 | .max_register = MAX_REGISTERS, | |
830 | }; | |
831 | ||
832 | static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id) | |
833 | { | |
834 | struct lp872x *lp; | |
af8b5fc3 KM |
835 | int ret, size, num_regulators; |
836 | const int lp872x_num_regulators[] = { | |
837 | [LP8720] = LP8720_NUM_REGULATORS, | |
838 | [LP8725] = LP8725_NUM_REGULATORS, | |
839 | }; | |
840 | ||
841 | lp = devm_kzalloc(&cl->dev, sizeof(struct lp872x), GFP_KERNEL); | |
842 | if (!lp) | |
843 | goto err_mem; | |
844 | ||
845 | num_regulators = lp872x_num_regulators[id->driver_data]; | |
846 | size = sizeof(struct regulator_dev *) * num_regulators; | |
847 | ||
848 | lp->regulators = devm_kzalloc(&cl->dev, size, GFP_KERNEL); | |
849 | if (!lp->regulators) | |
850 | goto err_mem; | |
851 | ||
852 | lp->regmap = devm_regmap_init_i2c(cl, &lp872x_regmap_config); | |
853 | if (IS_ERR(lp->regmap)) { | |
854 | ret = PTR_ERR(lp->regmap); | |
855 | dev_err(&cl->dev, "regmap init i2c err: %d\n", ret); | |
856 | goto err_dev; | |
857 | } | |
858 | ||
859 | lp->dev = &cl->dev; | |
9ffaa868 | 860 | lp->pdata = cl->dev.platform_data; |
af8b5fc3 KM |
861 | lp->chipid = id->driver_data; |
862 | lp->num_regulators = num_regulators; | |
863 | i2c_set_clientdata(cl, lp); | |
864 | ||
865 | ret = lp872x_config(lp); | |
866 | if (ret) | |
867 | goto err_dev; | |
868 | ||
869 | return lp872x_regulator_register(lp); | |
870 | ||
871 | err_mem: | |
872 | return -ENOMEM; | |
873 | err_dev: | |
874 | return ret; | |
875 | } | |
876 | ||
8dc995f5 | 877 | static int lp872x_remove(struct i2c_client *cl) |
af8b5fc3 KM |
878 | { |
879 | struct lp872x *lp = i2c_get_clientdata(cl); | |
880 | ||
881 | lp872x_regulator_unregister(lp); | |
882 | return 0; | |
883 | } | |
884 | ||
885 | static const struct i2c_device_id lp872x_ids[] = { | |
886 | {"lp8720", LP8720}, | |
887 | {"lp8725", LP8725}, | |
888 | { } | |
889 | }; | |
890 | MODULE_DEVICE_TABLE(i2c, lp872x_ids); | |
891 | ||
892 | static struct i2c_driver lp872x_driver = { | |
893 | .driver = { | |
894 | .name = "lp872x", | |
895 | .owner = THIS_MODULE, | |
896 | }, | |
897 | .probe = lp872x_probe, | |
5eb9f2b9 | 898 | .remove = lp872x_remove, |
af8b5fc3 KM |
899 | .id_table = lp872x_ids, |
900 | }; | |
901 | ||
902 | module_i2c_driver(lp872x_driver); | |
903 | ||
904 | MODULE_DESCRIPTION("TI/National Semiconductor LP872x PMU Regulator Driver"); | |
905 | MODULE_AUTHOR("Milo Kim"); | |
906 | MODULE_LICENSE("GPL"); |