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ade7515f KM |
1 | /* |
2 | * TI LP8788 MFD - buck regulator driver | |
3 | * | |
4 | * Copyright 2012 Texas Instruments | |
5 | * | |
6 | * Author: Milo(Woogyom) Kim <milo.kim@ti.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/err.h> | |
17 | #include <linux/platform_device.h> | |
18 | #include <linux/regulator/driver.h> | |
19 | #include <linux/mfd/lp8788.h> | |
20 | #include <linux/gpio.h> | |
21 | ||
22 | /* register address */ | |
23 | #define LP8788_EN_BUCK 0x0C | |
24 | #define LP8788_BUCK_DVS_SEL 0x1D | |
25 | #define LP8788_BUCK1_VOUT0 0x1E | |
26 | #define LP8788_BUCK1_VOUT1 0x1F | |
27 | #define LP8788_BUCK1_VOUT2 0x20 | |
28 | #define LP8788_BUCK1_VOUT3 0x21 | |
29 | #define LP8788_BUCK2_VOUT0 0x22 | |
30 | #define LP8788_BUCK2_VOUT1 0x23 | |
31 | #define LP8788_BUCK2_VOUT2 0x24 | |
32 | #define LP8788_BUCK2_VOUT3 0x25 | |
33 | #define LP8788_BUCK3_VOUT 0x26 | |
34 | #define LP8788_BUCK4_VOUT 0x27 | |
35 | #define LP8788_BUCK1_TIMESTEP 0x28 | |
36 | #define LP8788_BUCK_PWM 0x2D | |
37 | ||
38 | /* mask/shift bits */ | |
39 | #define LP8788_EN_BUCK1_M BIT(0) /* Addr 0Ch */ | |
40 | #define LP8788_EN_BUCK2_M BIT(1) | |
41 | #define LP8788_EN_BUCK3_M BIT(2) | |
42 | #define LP8788_EN_BUCK4_M BIT(3) | |
43 | #define LP8788_BUCK1_DVS_SEL_M 0x04 /* Addr 1Dh */ | |
44 | #define LP8788_BUCK1_DVS_M 0x03 | |
45 | #define LP8788_BUCK1_DVS_S 0 | |
46 | #define LP8788_BUCK2_DVS_SEL_M 0x40 | |
47 | #define LP8788_BUCK2_DVS_M 0x30 | |
48 | #define LP8788_BUCK2_DVS_S 4 | |
49 | #define LP8788_BUCK1_DVS_I2C BIT(2) | |
50 | #define LP8788_BUCK2_DVS_I2C BIT(6) | |
51 | #define LP8788_BUCK1_DVS_PIN (0 << 2) | |
52 | #define LP8788_BUCK2_DVS_PIN (0 << 6) | |
53 | #define LP8788_VOUT_M 0x1F /* Addr 1Eh ~ 27h */ | |
54 | #define LP8788_STARTUP_TIME_M 0xF8 /* Addr 28h ~ 2Bh */ | |
55 | #define LP8788_STARTUP_TIME_S 3 | |
56 | #define LP8788_FPWM_BUCK1_M BIT(0) /* Addr 2Dh */ | |
57 | #define LP8788_FPWM_BUCK1_S 0 | |
58 | #define LP8788_FPWM_BUCK2_M BIT(1) | |
59 | #define LP8788_FPWM_BUCK2_S 1 | |
60 | #define LP8788_FPWM_BUCK3_M BIT(2) | |
61 | #define LP8788_FPWM_BUCK3_S 2 | |
62 | #define LP8788_FPWM_BUCK4_M BIT(3) | |
63 | #define LP8788_FPWM_BUCK4_S 3 | |
64 | ||
65 | #define INVALID_ADDR 0xFF | |
66 | #define LP8788_FORCE_PWM 1 | |
67 | #define LP8788_AUTO_PWM 0 | |
68 | #define PIN_LOW 0 | |
69 | #define PIN_HIGH 1 | |
70 | #define ENABLE_TIME_USEC 32 | |
71 | ||
72 | enum lp8788_dvs_state { | |
73 | DVS_LOW = GPIOF_OUT_INIT_LOW, | |
74 | DVS_HIGH = GPIOF_OUT_INIT_HIGH, | |
75 | }; | |
76 | ||
77 | enum lp8788_dvs_mode { | |
78 | REGISTER, | |
79 | EXTPIN, | |
80 | }; | |
81 | ||
82 | enum lp8788_buck_id { | |
83 | BUCK1, | |
84 | BUCK2, | |
85 | BUCK3, | |
86 | BUCK4, | |
87 | }; | |
88 | ||
89 | struct lp8788_pwm_map { | |
90 | u8 mask; | |
91 | u8 shift; | |
92 | }; | |
93 | ||
94 | struct lp8788_buck { | |
95 | struct lp8788 *lp; | |
96 | struct regulator_dev *regulator; | |
97 | struct lp8788_pwm_map *pmap; | |
98 | void *dvs; | |
99 | }; | |
100 | ||
101 | /* BUCK 1 ~ 4 voltage table */ | |
102 | static const int lp8788_buck_vtbl[] = { | |
103 | 500000, 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, | |
104 | 1150000, 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, | |
105 | 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, | |
106 | 1950000, 2000000, | |
107 | }; | |
108 | ||
109 | /* buck pwm mode selection : used for set/get_mode in regulator ops | |
110 | * @forced pwm : fast mode | |
111 | * @auto pwm : normal mode | |
112 | */ | |
113 | static struct lp8788_pwm_map buck_pmap[] = { | |
114 | [BUCK1] = { | |
115 | .mask = LP8788_FPWM_BUCK1_M, | |
116 | .shift = LP8788_FPWM_BUCK1_S, | |
117 | }, | |
118 | [BUCK2] = { | |
119 | .mask = LP8788_FPWM_BUCK2_M, | |
120 | .shift = LP8788_FPWM_BUCK2_S, | |
121 | }, | |
122 | [BUCK3] = { | |
123 | .mask = LP8788_FPWM_BUCK3_M, | |
124 | .shift = LP8788_FPWM_BUCK3_S, | |
125 | }, | |
126 | [BUCK4] = { | |
127 | .mask = LP8788_FPWM_BUCK4_M, | |
128 | .shift = LP8788_FPWM_BUCK4_S, | |
129 | }, | |
130 | }; | |
131 | ||
132 | static const u8 buck1_vout_addr[] = { | |
133 | LP8788_BUCK1_VOUT0, LP8788_BUCK1_VOUT1, | |
134 | LP8788_BUCK1_VOUT2, LP8788_BUCK1_VOUT3, | |
135 | }; | |
136 | ||
137 | static const u8 buck2_vout_addr[] = { | |
138 | LP8788_BUCK2_VOUT0, LP8788_BUCK2_VOUT1, | |
139 | LP8788_BUCK2_VOUT2, LP8788_BUCK2_VOUT3, | |
140 | }; | |
141 | ||
142 | static void lp8788_buck1_set_dvs(struct lp8788_buck *buck) | |
143 | { | |
144 | struct lp8788_buck1_dvs *dvs = (struct lp8788_buck1_dvs *)buck->dvs; | |
145 | enum lp8788_dvs_state pinstate; | |
146 | ||
147 | if (!dvs) | |
148 | return; | |
149 | ||
150 | pinstate = dvs->vsel == DVS_SEL_V0 ? DVS_LOW : DVS_HIGH; | |
151 | if (gpio_is_valid(dvs->gpio)) | |
152 | gpio_set_value(dvs->gpio, pinstate); | |
153 | } | |
154 | ||
155 | static void lp8788_buck2_set_dvs(struct lp8788_buck *buck) | |
156 | { | |
157 | struct lp8788_buck2_dvs *dvs = (struct lp8788_buck2_dvs *)buck->dvs; | |
158 | enum lp8788_dvs_state pin1, pin2; | |
159 | ||
160 | if (!dvs) | |
161 | return; | |
162 | ||
163 | switch (dvs->vsel) { | |
164 | case DVS_SEL_V0: | |
165 | pin1 = DVS_LOW; | |
166 | pin2 = DVS_LOW; | |
167 | break; | |
168 | case DVS_SEL_V1: | |
169 | pin1 = DVS_HIGH; | |
170 | pin2 = DVS_LOW; | |
171 | break; | |
172 | case DVS_SEL_V2: | |
173 | pin1 = DVS_LOW; | |
174 | pin2 = DVS_HIGH; | |
175 | break; | |
176 | case DVS_SEL_V3: | |
177 | pin1 = DVS_HIGH; | |
178 | pin2 = DVS_HIGH; | |
179 | break; | |
180 | default: | |
181 | return; | |
182 | } | |
183 | ||
184 | if (gpio_is_valid(dvs->gpio[0])) | |
185 | gpio_set_value(dvs->gpio[0], pin1); | |
186 | ||
187 | if (gpio_is_valid(dvs->gpio[1])) | |
188 | gpio_set_value(dvs->gpio[1], pin2); | |
189 | } | |
190 | ||
191 | static void lp8788_set_dvs(struct lp8788_buck *buck, enum lp8788_buck_id id) | |
192 | { | |
193 | switch (id) { | |
194 | case BUCK1: | |
195 | lp8788_buck1_set_dvs(buck); | |
196 | break; | |
197 | case BUCK2: | |
198 | lp8788_buck2_set_dvs(buck); | |
199 | break; | |
200 | default: | |
201 | break; | |
202 | } | |
203 | } | |
204 | ||
205 | static enum lp8788_dvs_mode | |
206 | lp8788_get_buck_dvs_ctrl_mode(struct lp8788_buck *buck, enum lp8788_buck_id id) | |
207 | { | |
208 | u8 val, mask; | |
209 | ||
210 | switch (id) { | |
211 | case BUCK1: | |
212 | mask = LP8788_BUCK1_DVS_SEL_M; | |
213 | break; | |
214 | case BUCK2: | |
215 | mask = LP8788_BUCK2_DVS_SEL_M; | |
216 | break; | |
217 | default: | |
218 | return REGISTER; | |
219 | } | |
220 | ||
221 | lp8788_read_byte(buck->lp, LP8788_BUCK_DVS_SEL, &val); | |
222 | ||
223 | return val & mask ? REGISTER : EXTPIN; | |
224 | } | |
225 | ||
226 | static bool lp8788_is_valid_buck_addr(u8 addr) | |
227 | { | |
228 | switch (addr) { | |
229 | case LP8788_BUCK1_VOUT0: | |
230 | case LP8788_BUCK1_VOUT1: | |
231 | case LP8788_BUCK1_VOUT2: | |
232 | case LP8788_BUCK1_VOUT3: | |
233 | case LP8788_BUCK2_VOUT0: | |
234 | case LP8788_BUCK2_VOUT1: | |
235 | case LP8788_BUCK2_VOUT2: | |
236 | case LP8788_BUCK2_VOUT3: | |
237 | return true; | |
238 | default: | |
239 | return false; | |
240 | } | |
241 | } | |
242 | ||
243 | static u8 lp8788_select_buck_vout_addr(struct lp8788_buck *buck, | |
244 | enum lp8788_buck_id id) | |
245 | { | |
246 | enum lp8788_dvs_mode mode = lp8788_get_buck_dvs_ctrl_mode(buck, id); | |
247 | struct lp8788_buck1_dvs *b1_dvs; | |
248 | struct lp8788_buck2_dvs *b2_dvs; | |
249 | u8 val, idx, addr; | |
250 | int pin1, pin2; | |
251 | ||
252 | switch (id) { | |
253 | case BUCK1: | |
254 | if (mode == EXTPIN) { | |
255 | b1_dvs = (struct lp8788_buck1_dvs *)buck->dvs; | |
256 | if (!b1_dvs) | |
257 | goto err; | |
258 | ||
259 | idx = gpio_get_value(b1_dvs->gpio) ? 1 : 0; | |
260 | } else { | |
261 | lp8788_read_byte(buck->lp, LP8788_BUCK_DVS_SEL, &val); | |
262 | idx = (val & LP8788_BUCK1_DVS_M) >> LP8788_BUCK1_DVS_S; | |
263 | } | |
264 | addr = buck1_vout_addr[idx]; | |
265 | break; | |
266 | case BUCK2: | |
267 | if (mode == EXTPIN) { | |
268 | b2_dvs = (struct lp8788_buck2_dvs *)buck->dvs; | |
269 | if (!b2_dvs) | |
270 | goto err; | |
271 | ||
272 | pin1 = gpio_get_value(b2_dvs->gpio[0]); | |
273 | pin2 = gpio_get_value(b2_dvs->gpio[1]); | |
274 | ||
275 | if (pin1 == PIN_LOW && pin2 == PIN_LOW) | |
276 | idx = 0; | |
277 | else if (pin1 == PIN_LOW && pin2 == PIN_HIGH) | |
278 | idx = 2; | |
279 | else if (pin1 == PIN_HIGH && pin2 == PIN_LOW) | |
280 | idx = 1; | |
281 | else | |
282 | idx = 3; | |
283 | } else { | |
284 | lp8788_read_byte(buck->lp, LP8788_BUCK_DVS_SEL, &val); | |
285 | idx = (val & LP8788_BUCK2_DVS_M) >> LP8788_BUCK2_DVS_S; | |
286 | } | |
287 | addr = buck2_vout_addr[idx]; | |
288 | break; | |
289 | default: | |
290 | goto err; | |
291 | } | |
292 | ||
293 | return addr; | |
294 | err: | |
295 | return INVALID_ADDR; | |
296 | } | |
297 | ||
298 | static int lp8788_buck12_set_voltage_sel(struct regulator_dev *rdev, | |
299 | unsigned selector) | |
300 | { | |
301 | struct lp8788_buck *buck = rdev_get_drvdata(rdev); | |
302 | enum lp8788_buck_id id = rdev_get_id(rdev); | |
303 | u8 addr; | |
304 | ||
305 | if (buck->dvs) | |
306 | lp8788_set_dvs(buck, id); | |
307 | ||
308 | addr = lp8788_select_buck_vout_addr(buck, id); | |
309 | if (!lp8788_is_valid_buck_addr(addr)) | |
310 | return -EINVAL; | |
311 | ||
312 | return lp8788_update_bits(buck->lp, addr, LP8788_VOUT_M, selector); | |
313 | } | |
314 | ||
315 | static int lp8788_buck12_get_voltage_sel(struct regulator_dev *rdev) | |
316 | { | |
317 | struct lp8788_buck *buck = rdev_get_drvdata(rdev); | |
318 | enum lp8788_buck_id id = rdev_get_id(rdev); | |
319 | int ret; | |
320 | u8 val, addr; | |
321 | ||
322 | addr = lp8788_select_buck_vout_addr(buck, id); | |
323 | if (!lp8788_is_valid_buck_addr(addr)) | |
324 | return -EINVAL; | |
325 | ||
326 | ret = lp8788_read_byte(buck->lp, addr, &val); | |
327 | if (ret) | |
328 | return ret; | |
329 | ||
330 | return val & LP8788_VOUT_M; | |
331 | } | |
332 | ||
333 | static int lp8788_buck_enable_time(struct regulator_dev *rdev) | |
334 | { | |
335 | struct lp8788_buck *buck = rdev_get_drvdata(rdev); | |
336 | enum lp8788_buck_id id = rdev_get_id(rdev); | |
337 | u8 val, addr = LP8788_BUCK1_TIMESTEP + id; | |
338 | ||
339 | if (lp8788_read_byte(buck->lp, addr, &val)) | |
340 | return -EINVAL; | |
341 | ||
342 | val = (val & LP8788_STARTUP_TIME_M) >> LP8788_STARTUP_TIME_S; | |
343 | ||
344 | return ENABLE_TIME_USEC * val; | |
345 | } | |
346 | ||
347 | static int lp8788_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) | |
348 | { | |
349 | struct lp8788_buck *buck = rdev_get_drvdata(rdev); | |
350 | struct lp8788_pwm_map *pmap = buck->pmap; | |
351 | u8 val; | |
352 | ||
353 | if (!pmap) | |
354 | return -EINVAL; | |
355 | ||
356 | switch (mode) { | |
357 | case REGULATOR_MODE_FAST: | |
358 | val = LP8788_FORCE_PWM << pmap->shift; | |
359 | break; | |
360 | case REGULATOR_MODE_NORMAL: | |
361 | val = LP8788_AUTO_PWM << pmap->shift; | |
362 | break; | |
363 | default: | |
364 | return -EINVAL; | |
365 | } | |
366 | ||
367 | return lp8788_update_bits(buck->lp, LP8788_BUCK_PWM, pmap->mask, val); | |
368 | } | |
369 | ||
370 | static unsigned int lp8788_buck_get_mode(struct regulator_dev *rdev) | |
371 | { | |
372 | struct lp8788_buck *buck = rdev_get_drvdata(rdev); | |
373 | struct lp8788_pwm_map *pmap = buck->pmap; | |
374 | u8 val; | |
375 | int ret; | |
376 | ||
377 | if (!pmap) | |
378 | return -EINVAL; | |
379 | ||
380 | ret = lp8788_read_byte(buck->lp, LP8788_BUCK_PWM, &val); | |
381 | if (ret) | |
382 | return ret; | |
383 | ||
384 | return val & pmap->mask ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL; | |
385 | } | |
386 | ||
387 | static struct regulator_ops lp8788_buck12_ops = { | |
388 | .list_voltage = regulator_list_voltage_table, | |
389 | .set_voltage_sel = lp8788_buck12_set_voltage_sel, | |
390 | .get_voltage_sel = lp8788_buck12_get_voltage_sel, | |
391 | .enable = regulator_enable_regmap, | |
392 | .disable = regulator_disable_regmap, | |
393 | .is_enabled = regulator_is_enabled_regmap, | |
394 | .enable_time = lp8788_buck_enable_time, | |
395 | .set_mode = lp8788_buck_set_mode, | |
396 | .get_mode = lp8788_buck_get_mode, | |
397 | }; | |
398 | ||
399 | static struct regulator_ops lp8788_buck34_ops = { | |
400 | .list_voltage = regulator_list_voltage_table, | |
401 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
402 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
403 | .enable = regulator_enable_regmap, | |
404 | .disable = regulator_disable_regmap, | |
405 | .is_enabled = regulator_is_enabled_regmap, | |
406 | .enable_time = lp8788_buck_enable_time, | |
407 | .set_mode = lp8788_buck_set_mode, | |
408 | .get_mode = lp8788_buck_get_mode, | |
409 | }; | |
410 | ||
411 | static struct regulator_desc lp8788_buck_desc[] = { | |
412 | { | |
413 | .name = "buck1", | |
414 | .id = BUCK1, | |
415 | .ops = &lp8788_buck12_ops, | |
416 | .n_voltages = ARRAY_SIZE(lp8788_buck_vtbl), | |
417 | .volt_table = lp8788_buck_vtbl, | |
418 | .type = REGULATOR_VOLTAGE, | |
419 | .owner = THIS_MODULE, | |
420 | .enable_reg = LP8788_EN_BUCK, | |
421 | .enable_mask = LP8788_EN_BUCK1_M, | |
422 | }, | |
423 | { | |
424 | .name = "buck2", | |
425 | .id = BUCK2, | |
426 | .ops = &lp8788_buck12_ops, | |
427 | .n_voltages = ARRAY_SIZE(lp8788_buck_vtbl), | |
428 | .volt_table = lp8788_buck_vtbl, | |
429 | .type = REGULATOR_VOLTAGE, | |
430 | .owner = THIS_MODULE, | |
431 | .enable_reg = LP8788_EN_BUCK, | |
432 | .enable_mask = LP8788_EN_BUCK2_M, | |
433 | }, | |
434 | { | |
435 | .name = "buck3", | |
436 | .id = BUCK3, | |
437 | .ops = &lp8788_buck34_ops, | |
438 | .n_voltages = ARRAY_SIZE(lp8788_buck_vtbl), | |
439 | .volt_table = lp8788_buck_vtbl, | |
440 | .type = REGULATOR_VOLTAGE, | |
441 | .owner = THIS_MODULE, | |
442 | .vsel_reg = LP8788_BUCK3_VOUT, | |
443 | .vsel_mask = LP8788_VOUT_M, | |
444 | .enable_reg = LP8788_EN_BUCK, | |
445 | .enable_mask = LP8788_EN_BUCK3_M, | |
446 | }, | |
447 | { | |
448 | .name = "buck4", | |
449 | .id = BUCK4, | |
450 | .ops = &lp8788_buck34_ops, | |
451 | .n_voltages = ARRAY_SIZE(lp8788_buck_vtbl), | |
452 | .volt_table = lp8788_buck_vtbl, | |
453 | .type = REGULATOR_VOLTAGE, | |
454 | .owner = THIS_MODULE, | |
455 | .vsel_reg = LP8788_BUCK4_VOUT, | |
456 | .vsel_mask = LP8788_VOUT_M, | |
457 | .enable_reg = LP8788_EN_BUCK, | |
458 | .enable_mask = LP8788_EN_BUCK4_M, | |
459 | }, | |
460 | }; | |
461 | ||
462 | static int lp8788_set_default_dvs_ctrl_mode(struct lp8788 *lp, | |
463 | enum lp8788_buck_id id) | |
464 | { | |
465 | u8 mask, val; | |
466 | ||
467 | switch (id) { | |
468 | case BUCK1: | |
469 | mask = LP8788_BUCK1_DVS_SEL_M; | |
470 | val = LP8788_BUCK1_DVS_I2C; | |
471 | break; | |
472 | case BUCK2: | |
473 | mask = LP8788_BUCK2_DVS_SEL_M; | |
474 | val = LP8788_BUCK2_DVS_I2C; | |
475 | break; | |
476 | default: | |
477 | return 0; | |
478 | } | |
479 | ||
480 | return lp8788_update_bits(lp, LP8788_BUCK_DVS_SEL, mask, val); | |
481 | } | |
482 | ||
483 | static int _gpio_request(struct lp8788_buck *buck, int gpio, char *name) | |
484 | { | |
485 | struct device *dev = buck->lp->dev; | |
486 | ||
487 | if (!gpio_is_valid(gpio)) { | |
488 | dev_err(dev, "invalid gpio: %d\n", gpio); | |
489 | return -EINVAL; | |
490 | } | |
491 | ||
492 | return devm_gpio_request_one(dev, gpio, DVS_LOW, name); | |
493 | } | |
494 | ||
495 | static int lp8788_dvs_gpio_request(struct lp8788_buck *buck, | |
496 | enum lp8788_buck_id id) | |
497 | { | |
498 | struct lp8788_platform_data *pdata = buck->lp->pdata; | |
499 | char *b1_name = "LP8788_B1_DVS"; | |
500 | char *b2_name[] = { "LP8788_B2_DVS1", "LP8788_B2_DVS2" }; | |
501 | int i, gpio, ret; | |
502 | ||
503 | switch (id) { | |
504 | case BUCK1: | |
505 | gpio = pdata->buck1_dvs->gpio; | |
506 | ret = _gpio_request(buck, gpio, b1_name); | |
507 | if (ret) | |
508 | return ret; | |
509 | ||
510 | buck->dvs = pdata->buck1_dvs; | |
511 | break; | |
512 | case BUCK2: | |
513 | for (i = 0 ; i < LP8788_NUM_BUCK2_DVS ; i++) { | |
514 | gpio = pdata->buck2_dvs->gpio[i]; | |
515 | ret = _gpio_request(buck, gpio, b2_name[i]); | |
516 | if (ret) | |
517 | return ret; | |
518 | } | |
519 | buck->dvs = pdata->buck2_dvs; | |
520 | break; | |
521 | default: | |
522 | break; | |
523 | } | |
524 | ||
525 | return 0; | |
526 | } | |
527 | ||
528 | static int lp8788_init_dvs(struct lp8788_buck *buck, enum lp8788_buck_id id) | |
529 | { | |
530 | struct lp8788_platform_data *pdata = buck->lp->pdata; | |
531 | u8 mask[] = { LP8788_BUCK1_DVS_SEL_M, LP8788_BUCK2_DVS_SEL_M }; | |
532 | u8 val[] = { LP8788_BUCK1_DVS_PIN, LP8788_BUCK2_DVS_PIN }; | |
533 | ||
534 | /* no dvs for buck3, 4 */ | |
535 | if (id == BUCK3 || id == BUCK4) | |
536 | return 0; | |
537 | ||
538 | /* no dvs platform data, then dvs will be selected by I2C registers */ | |
539 | if (!pdata) | |
540 | goto set_default_dvs_mode; | |
541 | ||
542 | if ((id == BUCK1 && !pdata->buck1_dvs) || | |
543 | (id == BUCK2 && !pdata->buck2_dvs)) | |
544 | goto set_default_dvs_mode; | |
545 | ||
546 | if (lp8788_dvs_gpio_request(buck, id)) | |
547 | goto set_default_dvs_mode; | |
548 | ||
549 | return lp8788_update_bits(buck->lp, LP8788_BUCK_DVS_SEL, mask[id], | |
550 | val[id]); | |
551 | ||
552 | set_default_dvs_mode: | |
553 | return lp8788_set_default_dvs_ctrl_mode(buck->lp, id); | |
554 | } | |
555 | ||
556 | static __devinit int lp8788_buck_probe(struct platform_device *pdev) | |
557 | { | |
558 | struct lp8788 *lp = dev_get_drvdata(pdev->dev.parent); | |
559 | int id = pdev->id; | |
560 | struct lp8788_buck *buck; | |
561 | struct regulator_config cfg = { }; | |
562 | struct regulator_dev *rdev; | |
563 | int ret; | |
564 | ||
565 | buck = devm_kzalloc(lp->dev, sizeof(struct lp8788_buck), GFP_KERNEL); | |
566 | if (!buck) | |
567 | return -ENOMEM; | |
568 | ||
569 | buck->lp = lp; | |
570 | buck->pmap = &buck_pmap[id]; | |
571 | ||
572 | ret = lp8788_init_dvs(buck, id); | |
573 | if (ret) | |
574 | return ret; | |
575 | ||
576 | cfg.dev = lp->dev; | |
577 | cfg.init_data = lp->pdata ? lp->pdata->buck_data[id] : NULL; | |
578 | cfg.driver_data = buck; | |
579 | cfg.regmap = lp->regmap; | |
580 | ||
581 | rdev = regulator_register(&lp8788_buck_desc[id], &cfg); | |
582 | if (IS_ERR(rdev)) { | |
583 | ret = PTR_ERR(rdev); | |
584 | dev_err(lp->dev, "BUCK%d regulator register err = %d\n", | |
585 | id + 1, ret); | |
586 | return ret; | |
587 | } | |
588 | ||
589 | buck->regulator = rdev; | |
590 | platform_set_drvdata(pdev, buck); | |
591 | ||
592 | return 0; | |
593 | } | |
594 | ||
595 | static int __devexit lp8788_buck_remove(struct platform_device *pdev) | |
596 | { | |
597 | struct lp8788_buck *buck = platform_get_drvdata(pdev); | |
598 | ||
599 | platform_set_drvdata(pdev, NULL); | |
600 | regulator_unregister(buck->regulator); | |
601 | ||
602 | return 0; | |
603 | } | |
604 | ||
605 | static struct platform_driver lp8788_buck_driver = { | |
606 | .probe = lp8788_buck_probe, | |
607 | .remove = __devexit_p(lp8788_buck_remove), | |
608 | .driver = { | |
609 | .name = LP8788_DEV_BUCK, | |
610 | .owner = THIS_MODULE, | |
611 | }, | |
612 | }; | |
613 | ||
614 | static int __init lp8788_buck_init(void) | |
615 | { | |
616 | return platform_driver_register(&lp8788_buck_driver); | |
617 | } | |
618 | subsys_initcall(lp8788_buck_init); | |
619 | ||
620 | static void __exit lp8788_buck_exit(void) | |
621 | { | |
622 | platform_driver_unregister(&lp8788_buck_driver); | |
623 | } | |
624 | module_exit(lp8788_buck_exit); | |
625 | ||
626 | MODULE_DESCRIPTION("TI LP8788 BUCK Driver"); | |
627 | MODULE_AUTHOR("Milo Kim"); | |
628 | MODULE_LICENSE("GPL"); | |
629 | MODULE_ALIAS("platform:lp8788-buck"); |