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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 | ||
89 | /* dump registers in regmap-debugfs */ | |
90 | #define MAX_REGISTERS 0x0F | |
91 | ||
92 | enum lp872x_id { | |
93 | LP8720, | |
94 | LP8725, | |
95 | }; | |
96 | ||
97 | struct lp872x { | |
98 | struct regmap *regmap; | |
99 | struct device *dev; | |
100 | enum lp872x_id chipid; | |
101 | struct lp872x_platform_data *pdata; | |
102 | struct regulator_dev **regulators; | |
103 | int num_regulators; | |
104 | enum lp872x_dvs_state dvs_pin; | |
105 | int dvs_gpio; | |
106 | }; | |
107 | ||
108 | /* LP8720/LP8725 shared voltage table for LDOs */ | |
109 | static const unsigned int lp872x_ldo_vtbl[] = { | |
110 | 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000, | |
111 | 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 2000000, | |
112 | 2100000, 2200000, 2300000, 2400000, 2500000, 2600000, 2650000, 2700000, | |
113 | 2750000, 2800000, 2850000, 2900000, 2950000, 3000000, 3100000, 3300000, | |
114 | }; | |
115 | ||
116 | /* LP8720 LDO4 voltage table */ | |
117 | static const unsigned int lp8720_ldo4_vtbl[] = { | |
118 | 800000, 850000, 900000, 1000000, 1100000, 1200000, 1250000, 1300000, | |
119 | 1350000, 1400000, 1450000, 1500000, 1550000, 1600000, 1650000, 1700000, | |
120 | 1750000, 1800000, 1850000, 1900000, 2000000, 2100000, 2200000, 2300000, | |
121 | 2400000, 2500000, 2600000, 2650000, 2700000, 2750000, 2800000, 2850000, | |
122 | }; | |
123 | ||
124 | /* LP8725 LILO(Low Input Low Output) voltage table */ | |
125 | static const unsigned int lp8725_lilo_vtbl[] = { | |
126 | 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, | |
127 | 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1700000, | |
128 | 1800000, 1900000, 2000000, 2100000, 2200000, 2300000, 2400000, 2500000, | |
129 | 2600000, 2700000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000, | |
130 | }; | |
131 | ||
132 | /* LP8720 BUCK voltage table */ | |
133 | #define EXT_R 0 /* external resistor divider */ | |
134 | static const unsigned int lp8720_buck_vtbl[] = { | |
135 | EXT_R, 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, | |
136 | 1150000, 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, | |
137 | 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, | |
138 | 1950000, 2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, | |
139 | }; | |
140 | ||
141 | /* LP8725 BUCK voltage table */ | |
142 | static const unsigned int lp8725_buck_vtbl[] = { | |
143 | 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, | |
144 | 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1700000, | |
145 | 1750000, 1800000, 1850000, 1900000, 2000000, 2100000, 2200000, 2300000, | |
146 | 2400000, 2500000, 2600000, 2700000, 2800000, 2850000, 2900000, 3000000, | |
147 | }; | |
148 | ||
149 | /* LP8725 BUCK current limit */ | |
150 | static const unsigned int lp8725_buck_uA[] = { | |
151 | 460000, 780000, 1050000, 1370000, | |
152 | }; | |
153 | ||
154 | static int lp872x_read_byte(struct lp872x *lp, u8 addr, u8 *data) | |
155 | { | |
156 | int ret; | |
157 | unsigned int val; | |
158 | ||
159 | ret = regmap_read(lp->regmap, addr, &val); | |
160 | if (ret < 0) { | |
161 | dev_err(lp->dev, "failed to read 0x%.2x\n", addr); | |
162 | return ret; | |
163 | } | |
164 | ||
165 | *data = (u8)val; | |
166 | return 0; | |
167 | } | |
168 | ||
169 | static inline int lp872x_write_byte(struct lp872x *lp, u8 addr, u8 data) | |
170 | { | |
171 | return regmap_write(lp->regmap, addr, data); | |
172 | } | |
173 | ||
174 | static inline int lp872x_update_bits(struct lp872x *lp, u8 addr, | |
175 | unsigned int mask, u8 data) | |
176 | { | |
177 | return regmap_update_bits(lp->regmap, addr, mask, data); | |
178 | } | |
179 | ||
180 | static int _rdev_to_offset(struct regulator_dev *rdev) | |
181 | { | |
182 | enum lp872x_regulator_id id = rdev_get_id(rdev); | |
183 | ||
184 | switch (id) { | |
185 | case LP8720_ID_LDO1 ... LP8720_ID_BUCK: | |
186 | return id; | |
187 | case LP8725_ID_LDO1 ... LP8725_ID_BUCK2: | |
188 | return id - LP8725_ID_BASE; | |
189 | default: | |
190 | return -EINVAL; | |
191 | } | |
192 | } | |
193 | ||
194 | static int lp872x_get_timestep_usec(struct lp872x *lp) | |
195 | { | |
196 | enum lp872x_id chip = lp->chipid; | |
197 | u8 val, mask, shift; | |
198 | int *time_usec, size, ret; | |
199 | int lp8720_time_usec[] = { 25, 50 }; | |
200 | int lp8725_time_usec[] = { 32, 64, 128, 256 }; | |
201 | ||
202 | switch (chip) { | |
203 | case LP8720: | |
204 | mask = LP8720_TIMESTEP_M; | |
205 | shift = LP8720_TIMESTEP_S; | |
206 | time_usec = &lp8720_time_usec[0]; | |
207 | size = ARRAY_SIZE(lp8720_time_usec); | |
208 | break; | |
209 | case LP8725: | |
210 | mask = LP8725_TIMESTEP_M; | |
211 | shift = LP8725_TIMESTEP_S; | |
212 | time_usec = &lp8725_time_usec[0]; | |
213 | size = ARRAY_SIZE(lp8725_time_usec); | |
214 | break; | |
215 | default: | |
216 | return -EINVAL; | |
217 | } | |
218 | ||
219 | ret = lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val); | |
220 | if (ret) | |
221 | return -EINVAL; | |
222 | ||
223 | val = (val & mask) >> shift; | |
224 | if (val >= size) | |
225 | return -EINVAL; | |
226 | ||
227 | return *(time_usec + val); | |
228 | } | |
229 | ||
230 | static int lp872x_regulator_enable_time(struct regulator_dev *rdev) | |
231 | { | |
232 | struct lp872x *lp = rdev_get_drvdata(rdev); | |
233 | enum lp872x_regulator_id regulator = rdev_get_id(rdev); | |
234 | int time_step_us = lp872x_get_timestep_usec(lp); | |
235 | int ret, offset; | |
236 | u8 addr, val; | |
237 | ||
238 | if (time_step_us < 0) | |
239 | return -EINVAL; | |
240 | ||
241 | switch (regulator) { | |
242 | case LP8720_ID_LDO1 ... LP8720_ID_LDO5: | |
243 | case LP8725_ID_LDO1 ... LP8725_ID_LILO2: | |
244 | offset = _rdev_to_offset(rdev); | |
245 | if (offset < 0) | |
246 | return -EINVAL; | |
247 | ||
248 | addr = LP872X_LDO1_VOUT + offset; | |
249 | break; | |
250 | case LP8720_ID_BUCK: | |
251 | addr = LP8720_BUCK_VOUT1; | |
252 | break; | |
253 | case LP8725_ID_BUCK1: | |
254 | addr = LP8725_BUCK1_VOUT1; | |
255 | break; | |
256 | case LP8725_ID_BUCK2: | |
257 | addr = LP8725_BUCK2_VOUT1; | |
258 | break; | |
259 | default: | |
260 | return -EINVAL; | |
261 | } | |
262 | ||
263 | ret = lp872x_read_byte(lp, addr, &val); | |
264 | if (ret) | |
265 | return ret; | |
266 | ||
267 | val = (val & LP872X_START_DELAY_M) >> LP872X_START_DELAY_S; | |
268 | ||
269 | return val > MAX_DELAY ? 0 : val * time_step_us; | |
270 | } | |
271 | ||
272 | static void lp872x_set_dvs(struct lp872x *lp, int gpio) | |
273 | { | |
274 | enum lp872x_dvs_sel dvs_sel = lp->pdata->dvs->vsel; | |
275 | enum lp872x_dvs_state state; | |
276 | ||
277 | state = dvs_sel == SEL_V1 ? DVS_HIGH : DVS_LOW; | |
278 | gpio_set_value(gpio, state); | |
279 | lp->dvs_pin = state; | |
280 | } | |
281 | ||
282 | static u8 lp872x_select_buck_vout_addr(struct lp872x *lp, | |
283 | enum lp872x_regulator_id buck) | |
284 | { | |
285 | u8 val, addr; | |
286 | ||
287 | if (lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val)) | |
288 | return 0; | |
289 | ||
290 | switch (buck) { | |
291 | case LP8720_ID_BUCK: | |
292 | if (val & LP8720_EXT_DVS_M) { | |
293 | addr = (lp->dvs_pin == DVS_HIGH) ? | |
294 | LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2; | |
295 | } else { | |
296 | if (lp872x_read_byte(lp, LP8720_ENABLE, &val)) | |
297 | return 0; | |
298 | ||
299 | addr = val & LP8720_DVS_SEL_M ? | |
300 | LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2; | |
301 | } | |
302 | break; | |
303 | case LP8725_ID_BUCK1: | |
304 | if (val & LP8725_DVS1_M) | |
305 | addr = LP8725_BUCK1_VOUT1; | |
306 | else | |
307 | addr = (lp->dvs_pin == DVS_HIGH) ? | |
308 | LP8725_BUCK1_VOUT1 : LP8725_BUCK1_VOUT2; | |
309 | break; | |
310 | case LP8725_ID_BUCK2: | |
311 | addr = val & LP8725_DVS2_M ? | |
312 | LP8725_BUCK2_VOUT1 : LP8725_BUCK2_VOUT2; | |
313 | break; | |
314 | default: | |
315 | return 0; | |
316 | } | |
317 | ||
318 | return addr; | |
319 | } | |
320 | ||
321 | static bool lp872x_is_valid_buck_addr(u8 addr) | |
322 | { | |
323 | switch (addr) { | |
324 | case LP8720_BUCK_VOUT1: | |
325 | case LP8720_BUCK_VOUT2: | |
326 | case LP8725_BUCK1_VOUT1: | |
327 | case LP8725_BUCK1_VOUT2: | |
328 | case LP8725_BUCK2_VOUT1: | |
329 | case LP8725_BUCK2_VOUT2: | |
330 | return true; | |
331 | default: | |
332 | return false; | |
333 | } | |
334 | } | |
335 | ||
336 | static int lp872x_buck_set_voltage_sel(struct regulator_dev *rdev, | |
337 | unsigned selector) | |
338 | { | |
339 | struct lp872x *lp = rdev_get_drvdata(rdev); | |
340 | enum lp872x_regulator_id buck = rdev_get_id(rdev); | |
341 | u8 addr, mask = LP872X_VOUT_M; | |
342 | struct lp872x_dvs *dvs = lp->pdata->dvs; | |
343 | ||
344 | if (dvs && gpio_is_valid(dvs->gpio)) | |
345 | lp872x_set_dvs(lp, dvs->gpio); | |
346 | ||
347 | addr = lp872x_select_buck_vout_addr(lp, buck); | |
348 | if (!lp872x_is_valid_buck_addr(addr)) | |
349 | return -EINVAL; | |
350 | ||
351 | return lp872x_update_bits(lp, addr, mask, selector); | |
352 | } | |
353 | ||
354 | static int lp872x_buck_get_voltage_sel(struct regulator_dev *rdev) | |
355 | { | |
356 | struct lp872x *lp = rdev_get_drvdata(rdev); | |
357 | enum lp872x_regulator_id buck = rdev_get_id(rdev); | |
358 | u8 addr, val; | |
359 | int ret; | |
360 | ||
361 | addr = lp872x_select_buck_vout_addr(lp, buck); | |
362 | if (!lp872x_is_valid_buck_addr(addr)) | |
363 | return -EINVAL; | |
364 | ||
365 | ret = lp872x_read_byte(lp, addr, &val); | |
366 | if (ret) | |
367 | return ret; | |
368 | ||
369 | return val & LP872X_VOUT_M; | |
370 | } | |
371 | ||
372 | static int lp8725_buck_set_current_limit(struct regulator_dev *rdev, | |
373 | int min_uA, int max_uA) | |
374 | { | |
375 | struct lp872x *lp = rdev_get_drvdata(rdev); | |
376 | enum lp872x_regulator_id buck = rdev_get_id(rdev); | |
377 | int i, max = ARRAY_SIZE(lp8725_buck_uA); | |
378 | u8 addr, val; | |
379 | ||
380 | switch (buck) { | |
381 | case LP8725_ID_BUCK1: | |
382 | addr = LP8725_BUCK1_VOUT2; | |
383 | break; | |
384 | case LP8725_ID_BUCK2: | |
385 | addr = LP8725_BUCK2_VOUT2; | |
386 | break; | |
387 | default: | |
388 | return -EINVAL; | |
389 | } | |
390 | ||
391 | for (i = 0 ; i < max ; i++) | |
392 | if (lp8725_buck_uA[i] >= min_uA && | |
393 | lp8725_buck_uA[i] <= max_uA) | |
394 | break; | |
395 | ||
396 | if (i == max) | |
397 | return -EINVAL; | |
398 | ||
399 | val = i << LP8725_BUCK_CL_S; | |
400 | ||
401 | return lp872x_update_bits(lp, addr, LP8725_BUCK_CL_M, val); | |
402 | } | |
403 | ||
404 | static int lp8725_buck_get_current_limit(struct regulator_dev *rdev) | |
405 | { | |
406 | struct lp872x *lp = rdev_get_drvdata(rdev); | |
407 | enum lp872x_regulator_id buck = rdev_get_id(rdev); | |
408 | u8 addr, val; | |
409 | int ret; | |
410 | ||
411 | switch (buck) { | |
412 | case LP8725_ID_BUCK1: | |
413 | addr = LP8725_BUCK1_VOUT2; | |
414 | break; | |
415 | case LP8725_ID_BUCK2: | |
416 | addr = LP8725_BUCK2_VOUT2; | |
417 | break; | |
418 | default: | |
419 | return -EINVAL; | |
420 | } | |
421 | ||
422 | ret = lp872x_read_byte(lp, addr, &val); | |
423 | if (ret) | |
424 | return ret; | |
425 | ||
426 | val = (val & LP8725_BUCK_CL_M) >> LP8725_BUCK_CL_S; | |
427 | ||
428 | return (val < ARRAY_SIZE(lp8725_buck_uA)) ? | |
429 | lp8725_buck_uA[val] : -EINVAL; | |
430 | } | |
431 | ||
432 | static int lp872x_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) | |
433 | { | |
434 | struct lp872x *lp = rdev_get_drvdata(rdev); | |
435 | enum lp872x_regulator_id buck = rdev_get_id(rdev); | |
436 | u8 addr, mask, shift, val; | |
437 | ||
438 | switch (buck) { | |
439 | case LP8720_ID_BUCK: | |
440 | addr = LP8720_BUCK_VOUT2; | |
441 | mask = LP8720_BUCK_FPWM_M; | |
442 | shift = LP8720_BUCK_FPWM_S; | |
443 | break; | |
444 | case LP8725_ID_BUCK1: | |
445 | addr = LP8725_BUCK_CTRL; | |
446 | mask = LP8725_BUCK1_FPWM_M; | |
447 | shift = LP8725_BUCK1_FPWM_S; | |
448 | break; | |
449 | case LP8725_ID_BUCK2: | |
450 | addr = LP8725_BUCK_CTRL; | |
451 | mask = LP8725_BUCK2_FPWM_M; | |
452 | shift = LP8725_BUCK2_FPWM_S; | |
453 | break; | |
454 | default: | |
455 | return -EINVAL; | |
456 | } | |
457 | ||
458 | if (mode == REGULATOR_MODE_FAST) | |
459 | val = LP872X_FORCE_PWM << shift; | |
460 | else if (mode == REGULATOR_MODE_NORMAL) | |
461 | val = LP872X_AUTO_PWM << shift; | |
462 | else | |
463 | return -EINVAL; | |
464 | ||
465 | return lp872x_update_bits(lp, addr, mask, val); | |
466 | } | |
467 | ||
468 | static unsigned int lp872x_buck_get_mode(struct regulator_dev *rdev) | |
469 | { | |
470 | struct lp872x *lp = rdev_get_drvdata(rdev); | |
471 | enum lp872x_regulator_id buck = rdev_get_id(rdev); | |
472 | u8 addr, mask, val; | |
473 | int ret; | |
474 | ||
475 | switch (buck) { | |
476 | case LP8720_ID_BUCK: | |
477 | addr = LP8720_BUCK_VOUT2; | |
478 | mask = LP8720_BUCK_FPWM_M; | |
479 | break; | |
480 | case LP8725_ID_BUCK1: | |
481 | addr = LP8725_BUCK_CTRL; | |
482 | mask = LP8725_BUCK1_FPWM_M; | |
483 | break; | |
484 | case LP8725_ID_BUCK2: | |
485 | addr = LP8725_BUCK_CTRL; | |
486 | mask = LP8725_BUCK2_FPWM_M; | |
487 | break; | |
488 | default: | |
489 | return -EINVAL; | |
490 | } | |
491 | ||
492 | ret = lp872x_read_byte(lp, addr, &val); | |
493 | if (ret) | |
494 | return ret; | |
495 | ||
496 | return val & mask ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL; | |
497 | } | |
498 | ||
499 | static struct regulator_ops lp872x_ldo_ops = { | |
500 | .list_voltage = regulator_list_voltage_table, | |
501 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
502 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
503 | .enable = regulator_enable_regmap, | |
504 | .disable = regulator_disable_regmap, | |
505 | .is_enabled = regulator_is_enabled_regmap, | |
506 | .enable_time = lp872x_regulator_enable_time, | |
507 | }; | |
508 | ||
509 | static struct regulator_ops lp8720_buck_ops = { | |
510 | .list_voltage = regulator_list_voltage_table, | |
511 | .set_voltage_sel = lp872x_buck_set_voltage_sel, | |
512 | .get_voltage_sel = lp872x_buck_get_voltage_sel, | |
513 | .enable = regulator_enable_regmap, | |
514 | .disable = regulator_disable_regmap, | |
515 | .is_enabled = regulator_is_enabled_regmap, | |
516 | .enable_time = lp872x_regulator_enable_time, | |
517 | .set_mode = lp872x_buck_set_mode, | |
518 | .get_mode = lp872x_buck_get_mode, | |
519 | }; | |
520 | ||
521 | static struct regulator_ops lp8725_buck_ops = { | |
522 | .list_voltage = regulator_list_voltage_table, | |
523 | .set_voltage_sel = lp872x_buck_set_voltage_sel, | |
524 | .get_voltage_sel = lp872x_buck_get_voltage_sel, | |
525 | .enable = regulator_enable_regmap, | |
526 | .disable = regulator_disable_regmap, | |
527 | .is_enabled = regulator_is_enabled_regmap, | |
528 | .enable_time = lp872x_regulator_enable_time, | |
529 | .set_mode = lp872x_buck_set_mode, | |
530 | .get_mode = lp872x_buck_get_mode, | |
531 | .set_current_limit = lp8725_buck_set_current_limit, | |
532 | .get_current_limit = lp8725_buck_get_current_limit, | |
533 | }; | |
534 | ||
535 | static struct regulator_desc lp8720_regulator_desc[] = { | |
536 | { | |
537 | .name = "ldo1", | |
538 | .id = LP8720_ID_LDO1, | |
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_LDO1_VOUT, | |
545 | .vsel_mask = LP872X_VOUT_M, | |
546 | .enable_reg = LP8720_ENABLE, | |
547 | .enable_mask = LP872X_EN_LDO1_M, | |
548 | }, | |
549 | { | |
550 | .name = "ldo2", | |
551 | .id = LP8720_ID_LDO2, | |
552 | .ops = &lp872x_ldo_ops, | |
553 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), | |
554 | .volt_table = lp872x_ldo_vtbl, | |
555 | .type = REGULATOR_VOLTAGE, | |
556 | .owner = THIS_MODULE, | |
557 | .vsel_reg = LP872X_LDO2_VOUT, | |
558 | .vsel_mask = LP872X_VOUT_M, | |
559 | .enable_reg = LP8720_ENABLE, | |
560 | .enable_mask = LP872X_EN_LDO2_M, | |
561 | }, | |
562 | { | |
563 | .name = "ldo3", | |
564 | .id = LP8720_ID_LDO3, | |
565 | .ops = &lp872x_ldo_ops, | |
566 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), | |
567 | .volt_table = lp872x_ldo_vtbl, | |
568 | .type = REGULATOR_VOLTAGE, | |
569 | .owner = THIS_MODULE, | |
570 | .vsel_reg = LP872X_LDO3_VOUT, | |
571 | .vsel_mask = LP872X_VOUT_M, | |
572 | .enable_reg = LP8720_ENABLE, | |
573 | .enable_mask = LP872X_EN_LDO3_M, | |
574 | }, | |
575 | { | |
576 | .name = "ldo4", | |
577 | .id = LP8720_ID_LDO4, | |
578 | .ops = &lp872x_ldo_ops, | |
579 | .n_voltages = ARRAY_SIZE(lp8720_ldo4_vtbl), | |
580 | .volt_table = lp8720_ldo4_vtbl, | |
581 | .type = REGULATOR_VOLTAGE, | |
582 | .owner = THIS_MODULE, | |
583 | .vsel_reg = LP872X_LDO4_VOUT, | |
584 | .vsel_mask = LP872X_VOUT_M, | |
585 | .enable_reg = LP8720_ENABLE, | |
586 | .enable_mask = LP872X_EN_LDO4_M, | |
587 | }, | |
588 | { | |
589 | .name = "ldo5", | |
590 | .id = LP8720_ID_LDO5, | |
591 | .ops = &lp872x_ldo_ops, | |
592 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), | |
593 | .volt_table = lp872x_ldo_vtbl, | |
594 | .type = REGULATOR_VOLTAGE, | |
595 | .owner = THIS_MODULE, | |
596 | .vsel_reg = LP872X_LDO5_VOUT, | |
597 | .vsel_mask = LP872X_VOUT_M, | |
598 | .enable_reg = LP8720_ENABLE, | |
599 | .enable_mask = LP872X_EN_LDO5_M, | |
600 | }, | |
601 | { | |
602 | .name = "buck", | |
603 | .id = LP8720_ID_BUCK, | |
604 | .ops = &lp8720_buck_ops, | |
605 | .n_voltages = ARRAY_SIZE(lp8720_buck_vtbl), | |
606 | .volt_table = lp8720_buck_vtbl, | |
607 | .type = REGULATOR_VOLTAGE, | |
608 | .owner = THIS_MODULE, | |
609 | .enable_reg = LP8720_ENABLE, | |
610 | .enable_mask = LP8720_EN_BUCK_M, | |
611 | }, | |
612 | }; | |
613 | ||
614 | static struct regulator_desc lp8725_regulator_desc[] = { | |
615 | { | |
616 | .name = "ldo1", | |
617 | .id = LP8725_ID_LDO1, | |
618 | .ops = &lp872x_ldo_ops, | |
619 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), | |
620 | .volt_table = lp872x_ldo_vtbl, | |
621 | .type = REGULATOR_VOLTAGE, | |
622 | .owner = THIS_MODULE, | |
623 | .vsel_reg = LP872X_LDO1_VOUT, | |
624 | .vsel_mask = LP872X_VOUT_M, | |
625 | .enable_reg = LP8725_LDO_CTRL, | |
626 | .enable_mask = LP872X_EN_LDO1_M, | |
627 | }, | |
628 | { | |
629 | .name = "ldo2", | |
630 | .id = LP8725_ID_LDO2, | |
631 | .ops = &lp872x_ldo_ops, | |
632 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), | |
633 | .volt_table = lp872x_ldo_vtbl, | |
634 | .type = REGULATOR_VOLTAGE, | |
635 | .owner = THIS_MODULE, | |
636 | .vsel_reg = LP872X_LDO2_VOUT, | |
637 | .vsel_mask = LP872X_VOUT_M, | |
638 | .enable_reg = LP8725_LDO_CTRL, | |
639 | .enable_mask = LP872X_EN_LDO2_M, | |
640 | }, | |
641 | { | |
642 | .name = "ldo3", | |
643 | .id = LP8725_ID_LDO3, | |
644 | .ops = &lp872x_ldo_ops, | |
645 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), | |
646 | .volt_table = lp872x_ldo_vtbl, | |
647 | .type = REGULATOR_VOLTAGE, | |
648 | .owner = THIS_MODULE, | |
649 | .vsel_reg = LP872X_LDO3_VOUT, | |
650 | .vsel_mask = LP872X_VOUT_M, | |
651 | .enable_reg = LP8725_LDO_CTRL, | |
652 | .enable_mask = LP872X_EN_LDO3_M, | |
653 | }, | |
654 | { | |
655 | .name = "ldo4", | |
656 | .id = LP8725_ID_LDO4, | |
657 | .ops = &lp872x_ldo_ops, | |
658 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), | |
659 | .volt_table = lp872x_ldo_vtbl, | |
660 | .type = REGULATOR_VOLTAGE, | |
661 | .owner = THIS_MODULE, | |
662 | .vsel_reg = LP872X_LDO4_VOUT, | |
663 | .vsel_mask = LP872X_VOUT_M, | |
664 | .enable_reg = LP8725_LDO_CTRL, | |
665 | .enable_mask = LP872X_EN_LDO4_M, | |
666 | }, | |
667 | { | |
668 | .name = "ldo5", | |
669 | .id = LP8725_ID_LDO5, | |
670 | .ops = &lp872x_ldo_ops, | |
671 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), | |
672 | .volt_table = lp872x_ldo_vtbl, | |
673 | .type = REGULATOR_VOLTAGE, | |
674 | .owner = THIS_MODULE, | |
675 | .vsel_reg = LP872X_LDO5_VOUT, | |
676 | .vsel_mask = LP872X_VOUT_M, | |
677 | .enable_reg = LP8725_LDO_CTRL, | |
678 | .enable_mask = LP872X_EN_LDO5_M, | |
679 | }, | |
680 | { | |
681 | .name = "lilo1", | |
682 | .id = LP8725_ID_LILO1, | |
683 | .ops = &lp872x_ldo_ops, | |
684 | .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl), | |
685 | .volt_table = lp8725_lilo_vtbl, | |
686 | .type = REGULATOR_VOLTAGE, | |
687 | .owner = THIS_MODULE, | |
688 | .vsel_reg = LP8725_LILO1_VOUT, | |
689 | .vsel_mask = LP872X_VOUT_M, | |
690 | .enable_reg = LP8725_LDO_CTRL, | |
691 | .enable_mask = LP8725_EN_LILO1_M, | |
692 | }, | |
693 | { | |
694 | .name = "lilo2", | |
695 | .id = LP8725_ID_LILO2, | |
696 | .ops = &lp872x_ldo_ops, | |
697 | .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl), | |
698 | .volt_table = lp8725_lilo_vtbl, | |
699 | .type = REGULATOR_VOLTAGE, | |
700 | .owner = THIS_MODULE, | |
701 | .vsel_reg = LP8725_LILO2_VOUT, | |
702 | .vsel_mask = LP872X_VOUT_M, | |
703 | .enable_reg = LP8725_LDO_CTRL, | |
704 | .enable_mask = LP8725_EN_LILO2_M, | |
705 | }, | |
706 | { | |
707 | .name = "buck1", | |
708 | .id = LP8725_ID_BUCK1, | |
709 | .ops = &lp8725_buck_ops, | |
710 | .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl), | |
711 | .volt_table = lp8725_buck_vtbl, | |
712 | .type = REGULATOR_VOLTAGE, | |
713 | .owner = THIS_MODULE, | |
714 | .enable_reg = LP872X_GENERAL_CFG, | |
715 | .enable_mask = LP8725_BUCK1_EN_M, | |
716 | }, | |
717 | { | |
718 | .name = "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 | ||
730 | static int lp872x_check_dvs_validity(struct lp872x *lp) | |
731 | { | |
732 | struct lp872x_dvs *dvs = lp->pdata->dvs; | |
733 | u8 val = 0; | |
734 | int ret; | |
735 | ||
736 | ret = lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val); | |
737 | if (ret) | |
738 | return ret; | |
739 | ||
740 | ret = 0; | |
741 | if (lp->chipid == LP8720) { | |
742 | if (val & LP8720_EXT_DVS_M) | |
743 | ret = dvs ? 0 : -EINVAL; | |
744 | } else { | |
745 | if ((val & LP8725_DVS1_M) == EXTERN_DVS_USED) | |
746 | ret = dvs ? 0 : -EINVAL; | |
747 | } | |
748 | ||
749 | return ret; | |
750 | } | |
751 | ||
752 | static int lp872x_init_dvs(struct lp872x *lp) | |
753 | { | |
754 | int ret, gpio; | |
755 | struct lp872x_dvs *dvs = lp->pdata->dvs; | |
756 | enum lp872x_dvs_state pinstate; | |
757 | ||
758 | ret = lp872x_check_dvs_validity(lp); | |
759 | if (ret) { | |
760 | dev_warn(lp->dev, "invalid dvs data: %d\n", ret); | |
761 | return ret; | |
762 | } | |
763 | ||
764 | gpio = dvs->gpio; | |
765 | if (!gpio_is_valid(gpio)) { | |
766 | dev_err(lp->dev, "invalid gpio: %d\n", gpio); | |
767 | return -EINVAL; | |
768 | } | |
769 | ||
770 | pinstate = dvs->init_state; | |
771 | ret = devm_gpio_request_one(lp->dev, gpio, pinstate, "LP872X DVS"); | |
772 | if (ret) { | |
773 | dev_err(lp->dev, "gpio request err: %d\n", ret); | |
774 | return ret; | |
775 | } | |
776 | ||
777 | lp->dvs_pin = pinstate; | |
778 | lp->dvs_gpio = gpio; | |
779 | ||
780 | return 0; | |
781 | } | |
782 | ||
783 | static int lp872x_config(struct lp872x *lp) | |
784 | { | |
785 | struct lp872x_platform_data *pdata = lp->pdata; | |
786 | int ret; | |
787 | ||
af8b5fc3 KM |
788 | if (!pdata->update_config) |
789 | return 0; | |
790 | ||
791 | ret = lp872x_write_byte(lp, LP872X_GENERAL_CFG, pdata->general_config); | |
792 | if (ret) | |
793 | return ret; | |
794 | ||
795 | return lp872x_init_dvs(lp); | |
796 | } | |
797 | ||
798 | static struct regulator_init_data | |
799 | *lp872x_find_regulator_init_data(int idx, struct lp872x *lp) | |
800 | { | |
801 | int i, base, id, max_regulators; | |
802 | ||
803 | switch (lp->chipid) { | |
804 | case LP8720: | |
805 | base = LP8720_ID_BASE; | |
806 | max_regulators = LP8720_NUM_REGULATORS; | |
807 | break; | |
808 | case LP8725: | |
809 | base = LP8725_ID_BASE; | |
810 | max_regulators = LP8725_NUM_REGULATORS; | |
811 | break; | |
812 | default: | |
813 | return NULL; | |
814 | } | |
815 | ||
816 | id = base + idx; | |
817 | for (i = 0 ; i < max_regulators ; i++) | |
818 | if (lp->pdata->regulator_data[i].id == id) | |
819 | break; | |
820 | ||
821 | return (i == max_regulators) ? NULL : | |
822 | lp->pdata->regulator_data[i].init_data; | |
823 | } | |
824 | ||
825 | static int lp872x_regulator_register(struct lp872x *lp) | |
826 | { | |
827 | struct regulator_desc *desc; | |
828 | struct regulator_config cfg = { }; | |
829 | struct regulator_dev *rdev; | |
830 | int i, ret; | |
831 | ||
832 | for (i = 0 ; i < lp->num_regulators ; i++) { | |
833 | desc = (lp->chipid == LP8720) ? &lp8720_regulator_desc[i] : | |
834 | &lp8725_regulator_desc[i]; | |
835 | ||
836 | cfg.dev = lp->dev; | |
837 | cfg.init_data = lp872x_find_regulator_init_data(i, lp); | |
838 | cfg.driver_data = lp; | |
839 | cfg.regmap = lp->regmap; | |
840 | ||
841 | rdev = regulator_register(desc, &cfg); | |
842 | if (IS_ERR(rdev)) { | |
843 | dev_err(lp->dev, "regulator register err"); | |
844 | ret = PTR_ERR(rdev); | |
845 | goto err; | |
846 | } | |
847 | ||
848 | *(lp->regulators + i) = rdev; | |
849 | } | |
850 | ||
851 | return 0; | |
852 | err: | |
853 | while (--i >= 0) { | |
854 | rdev = *(lp->regulators + i); | |
855 | regulator_unregister(rdev); | |
856 | } | |
857 | return ret; | |
858 | } | |
859 | ||
860 | static void lp872x_regulator_unregister(struct lp872x *lp) | |
861 | { | |
862 | struct regulator_dev *rdev; | |
863 | int i; | |
864 | ||
865 | for (i = 0 ; i < lp->num_regulators ; i++) { | |
866 | rdev = *(lp->regulators + i); | |
867 | regulator_unregister(rdev); | |
868 | } | |
869 | } | |
870 | ||
871 | static const struct regmap_config lp872x_regmap_config = { | |
872 | .reg_bits = 8, | |
873 | .val_bits = 8, | |
874 | .max_register = MAX_REGISTERS, | |
875 | }; | |
876 | ||
877 | static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id) | |
878 | { | |
879 | struct lp872x *lp; | |
880 | struct lp872x_platform_data *pdata = cl->dev.platform_data; | |
881 | int ret, size, num_regulators; | |
882 | const int lp872x_num_regulators[] = { | |
883 | [LP8720] = LP8720_NUM_REGULATORS, | |
884 | [LP8725] = LP8725_NUM_REGULATORS, | |
885 | }; | |
886 | ||
baf73e2c AL |
887 | if (!pdata) { |
888 | dev_warn(&cl->dev, "no platform data\n"); | |
889 | return -EINVAL; | |
890 | } | |
891 | ||
af8b5fc3 KM |
892 | lp = devm_kzalloc(&cl->dev, sizeof(struct lp872x), GFP_KERNEL); |
893 | if (!lp) | |
894 | goto err_mem; | |
895 | ||
896 | num_regulators = lp872x_num_regulators[id->driver_data]; | |
897 | size = sizeof(struct regulator_dev *) * num_regulators; | |
898 | ||
899 | lp->regulators = devm_kzalloc(&cl->dev, size, GFP_KERNEL); | |
900 | if (!lp->regulators) | |
901 | goto err_mem; | |
902 | ||
903 | lp->regmap = devm_regmap_init_i2c(cl, &lp872x_regmap_config); | |
904 | if (IS_ERR(lp->regmap)) { | |
905 | ret = PTR_ERR(lp->regmap); | |
906 | dev_err(&cl->dev, "regmap init i2c err: %d\n", ret); | |
907 | goto err_dev; | |
908 | } | |
909 | ||
910 | lp->dev = &cl->dev; | |
911 | lp->pdata = pdata; | |
912 | lp->chipid = id->driver_data; | |
913 | lp->num_regulators = num_regulators; | |
914 | i2c_set_clientdata(cl, lp); | |
915 | ||
916 | ret = lp872x_config(lp); | |
917 | if (ret) | |
918 | goto err_dev; | |
919 | ||
920 | return lp872x_regulator_register(lp); | |
921 | ||
922 | err_mem: | |
923 | return -ENOMEM; | |
924 | err_dev: | |
925 | return ret; | |
926 | } | |
927 | ||
928 | static int __devexit lp872x_remove(struct i2c_client *cl) | |
929 | { | |
930 | struct lp872x *lp = i2c_get_clientdata(cl); | |
931 | ||
932 | lp872x_regulator_unregister(lp); | |
933 | return 0; | |
934 | } | |
935 | ||
936 | static const struct i2c_device_id lp872x_ids[] = { | |
937 | {"lp8720", LP8720}, | |
938 | {"lp8725", LP8725}, | |
939 | { } | |
940 | }; | |
941 | MODULE_DEVICE_TABLE(i2c, lp872x_ids); | |
942 | ||
943 | static struct i2c_driver lp872x_driver = { | |
944 | .driver = { | |
945 | .name = "lp872x", | |
946 | .owner = THIS_MODULE, | |
947 | }, | |
948 | .probe = lp872x_probe, | |
949 | .remove = __devexit_p(lp872x_remove), | |
950 | .id_table = lp872x_ids, | |
951 | }; | |
952 | ||
953 | module_i2c_driver(lp872x_driver); | |
954 | ||
955 | MODULE_DESCRIPTION("TI/National Semiconductor LP872x PMU Regulator Driver"); | |
956 | MODULE_AUTHOR("Milo Kim"); | |
957 | MODULE_LICENSE("GPL"); |