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f6130be6 AJ |
1 | /* |
2 | * Regulator driver for DA9055 PMIC | |
3 | * | |
4 | * Copyright(c) 2012 Dialog Semiconductor Ltd. | |
5 | * | |
6 | * Author: David Dajun Chen <dchen@diasemi.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 as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/err.h> | |
18 | #include <linux/gpio.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/regulator/driver.h> | |
21 | #include <linux/regulator/machine.h> | |
22 | ||
23 | #include <linux/mfd/da9055/core.h> | |
24 | #include <linux/mfd/da9055/reg.h> | |
25 | #include <linux/mfd/da9055/pdata.h> | |
26 | ||
27 | #define DA9055_MIN_UA 0 | |
28 | #define DA9055_MAX_UA 3 | |
29 | ||
30 | #define DA9055_LDO_MODE_SYNC 0 | |
31 | #define DA9055_LDO_MODE_SLEEP 1 | |
32 | ||
33 | #define DA9055_BUCK_MODE_SLEEP 1 | |
34 | #define DA9055_BUCK_MODE_SYNC 2 | |
35 | #define DA9055_BUCK_MODE_AUTO 3 | |
36 | ||
37 | /* DA9055 REGULATOR IDs */ | |
38 | #define DA9055_ID_BUCK1 0 | |
39 | #define DA9055_ID_BUCK2 1 | |
40 | #define DA9055_ID_LDO1 2 | |
41 | #define DA9055_ID_LDO2 3 | |
42 | #define DA9055_ID_LDO3 4 | |
43 | #define DA9055_ID_LDO4 5 | |
44 | #define DA9055_ID_LDO5 6 | |
45 | #define DA9055_ID_LDO6 7 | |
46 | ||
47 | /* DA9055 BUCK current limit */ | |
48 | static const int da9055_current_limits[] = { 500000, 600000, 700000, 800000 }; | |
49 | ||
50 | struct da9055_conf_reg { | |
51 | int reg; | |
52 | int sel_mask; | |
53 | int en_mask; | |
54 | }; | |
55 | ||
56 | struct da9055_volt_reg { | |
57 | int reg_a; | |
58 | int reg_b; | |
59 | int sl_shift; | |
60 | int v_offset; | |
61 | int v_mask; | |
62 | int v_shift; | |
63 | }; | |
64 | ||
65 | struct da9055_mode_reg { | |
66 | int reg; | |
67 | int mask; | |
68 | int shift; | |
69 | }; | |
70 | ||
71 | struct da9055_regulator_info { | |
72 | struct regulator_desc reg_desc; | |
73 | struct da9055_conf_reg conf; | |
74 | struct da9055_volt_reg volt; | |
75 | struct da9055_mode_reg mode; | |
76 | }; | |
77 | ||
78 | struct da9055_regulator { | |
79 | struct da9055 *da9055; | |
80 | struct da9055_regulator_info *info; | |
81 | struct regulator_dev *rdev; | |
82 | enum gpio_select reg_rselect; | |
83 | }; | |
84 | ||
85 | static unsigned int da9055_buck_get_mode(struct regulator_dev *rdev) | |
86 | { | |
87 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
88 | struct da9055_regulator_info *info = regulator->info; | |
89 | int ret, mode = 0; | |
90 | ||
91 | ret = da9055_reg_read(regulator->da9055, info->mode.reg); | |
92 | if (ret < 0) | |
93 | return ret; | |
94 | ||
95 | switch ((ret & info->mode.mask) >> info->mode.shift) { | |
96 | case DA9055_BUCK_MODE_SYNC: | |
97 | mode = REGULATOR_MODE_FAST; | |
98 | break; | |
99 | case DA9055_BUCK_MODE_AUTO: | |
100 | mode = REGULATOR_MODE_NORMAL; | |
101 | break; | |
102 | case DA9055_BUCK_MODE_SLEEP: | |
103 | mode = REGULATOR_MODE_STANDBY; | |
104 | break; | |
105 | } | |
106 | ||
107 | return mode; | |
108 | } | |
109 | ||
110 | static int da9055_buck_set_mode(struct regulator_dev *rdev, | |
111 | unsigned int mode) | |
112 | { | |
113 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
114 | struct da9055_regulator_info *info = regulator->info; | |
115 | int val = 0; | |
116 | ||
117 | switch (mode) { | |
118 | case REGULATOR_MODE_FAST: | |
119 | val = DA9055_BUCK_MODE_SYNC << info->mode.shift; | |
120 | break; | |
121 | case REGULATOR_MODE_NORMAL: | |
122 | val = DA9055_BUCK_MODE_AUTO << info->mode.shift; | |
123 | break; | |
124 | case REGULATOR_MODE_STANDBY: | |
125 | val = DA9055_BUCK_MODE_SLEEP << info->mode.shift; | |
126 | break; | |
127 | } | |
128 | ||
129 | return da9055_reg_update(regulator->da9055, info->mode.reg, | |
130 | info->mode.mask, val); | |
131 | } | |
132 | ||
133 | static unsigned int da9055_ldo_get_mode(struct regulator_dev *rdev) | |
134 | { | |
135 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
136 | struct da9055_regulator_info *info = regulator->info; | |
137 | int ret; | |
138 | ||
139 | ret = da9055_reg_read(regulator->da9055, info->volt.reg_b); | |
140 | if (ret < 0) | |
141 | return ret; | |
142 | ||
143 | if (ret >> info->volt.sl_shift) | |
144 | return REGULATOR_MODE_STANDBY; | |
145 | else | |
146 | return REGULATOR_MODE_NORMAL; | |
147 | } | |
148 | ||
149 | static int da9055_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode) | |
150 | { | |
151 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
152 | struct da9055_regulator_info *info = regulator->info; | |
153 | struct da9055_volt_reg volt = info->volt; | |
154 | int val = 0; | |
155 | ||
156 | switch (mode) { | |
157 | case REGULATOR_MODE_NORMAL: | |
158 | case REGULATOR_MODE_FAST: | |
159 | val = DA9055_LDO_MODE_SYNC; | |
160 | break; | |
161 | case REGULATOR_MODE_STANDBY: | |
162 | val = DA9055_LDO_MODE_SLEEP; | |
163 | break; | |
164 | } | |
165 | ||
166 | return da9055_reg_update(regulator->da9055, volt.reg_b, | |
167 | 1 << volt.sl_shift, | |
168 | val << volt.sl_shift); | |
169 | } | |
170 | ||
171 | static int da9055_buck_get_current_limit(struct regulator_dev *rdev) | |
172 | { | |
173 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
174 | struct da9055_regulator_info *info = regulator->info; | |
175 | int ret; | |
176 | ||
177 | ret = da9055_reg_read(regulator->da9055, DA9055_REG_BUCK_LIM); | |
178 | if (ret < 0) | |
179 | return ret; | |
180 | ||
181 | ret &= info->mode.mask; | |
182 | return da9055_current_limits[ret >> info->mode.shift]; | |
183 | } | |
184 | ||
185 | static int da9055_buck_set_current_limit(struct regulator_dev *rdev, int min_uA, | |
186 | int max_uA) | |
187 | { | |
188 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
189 | struct da9055_regulator_info *info = regulator->info; | |
190 | int i, val = 0; | |
191 | ||
192 | if (min_uA > da9055_current_limits[DA9055_MAX_UA] || | |
193 | max_uA < da9055_current_limits[DA9055_MIN_UA]) | |
194 | return -EINVAL; | |
195 | ||
196 | for (i = 0; i < ARRAY_SIZE(da9055_current_limits); i++) { | |
197 | if (min_uA <= da9055_current_limits[i]) { | |
198 | val = i; | |
199 | break; | |
200 | } | |
201 | } | |
202 | ||
203 | return da9055_reg_update(regulator->da9055, DA9055_REG_BUCK_LIM, | |
204 | info->mode.mask, val << info->mode.shift); | |
205 | } | |
206 | ||
369cf602 AL |
207 | static int da9055_list_voltage(struct regulator_dev *rdev, unsigned selector) |
208 | { | |
209 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
210 | struct da9055_regulator_info *info = regulator->info; | |
211 | ||
212 | if (selector >= rdev->desc->n_voltages) | |
213 | return -EINVAL; | |
214 | ||
215 | if (selector < info->volt.v_offset) | |
216 | return 0; | |
217 | ||
218 | selector -= info->volt.v_offset; | |
219 | return rdev->desc->min_uV + (rdev->desc->uV_step * selector); | |
220 | } | |
221 | ||
222 | static int da9055_map_voltage(struct regulator_dev *rdev, int min_uV, | |
223 | int max_uV) | |
224 | { | |
225 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
226 | struct da9055_regulator_info *info = regulator->info; | |
227 | int sel, voltage; | |
228 | ||
229 | if (min_uV < rdev->desc->min_uV) | |
230 | min_uV = rdev->desc->min_uV; | |
231 | ||
232 | sel = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step); | |
233 | sel += info->volt.v_offset; | |
234 | ||
235 | voltage = da9055_list_voltage(rdev, sel); | |
236 | if (voltage < min_uV || voltage > max_uV) | |
237 | return -EINVAL; | |
238 | ||
239 | return sel; | |
240 | } | |
241 | ||
f6130be6 AJ |
242 | static int da9055_regulator_get_voltage_sel(struct regulator_dev *rdev) |
243 | { | |
244 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
245 | struct da9055_regulator_info *info = regulator->info; | |
246 | struct da9055_volt_reg volt = info->volt; | |
247 | int ret, sel; | |
248 | ||
249 | /* | |
250 | * There are two voltage register set A & B for voltage ramping but | |
251 | * either one of then can be active therefore we first determine | |
252 | * the active register set. | |
253 | */ | |
254 | ret = da9055_reg_read(regulator->da9055, info->conf.reg); | |
255 | if (ret < 0) | |
256 | return ret; | |
257 | ||
258 | ret &= info->conf.sel_mask; | |
259 | ||
260 | /* Get the voltage for the active register set A/B */ | |
261 | if (ret == DA9055_REGUALTOR_SET_A) | |
262 | ret = da9055_reg_read(regulator->da9055, volt.reg_a); | |
263 | else | |
264 | ret = da9055_reg_read(regulator->da9055, volt.reg_b); | |
265 | ||
266 | if (ret < 0) | |
267 | return ret; | |
268 | ||
269 | sel = (ret & volt.v_mask); | |
270 | if (sel <= volt.v_offset) | |
271 | return 0; | |
272 | else | |
273 | return sel; | |
274 | } | |
275 | ||
f6130be6 AJ |
276 | static int da9055_regulator_set_voltage_sel(struct regulator_dev *rdev, |
277 | unsigned int selector) | |
278 | { | |
279 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
280 | struct da9055_regulator_info *info = regulator->info; | |
281 | int ret; | |
282 | ||
283 | /* | |
284 | * Regulator register set A/B is not selected through GPIO therefore | |
285 | * we use default register set A for voltage ramping. | |
286 | */ | |
287 | if (regulator->reg_rselect == NO_GPIO) { | |
288 | /* Select register set A */ | |
289 | ret = da9055_reg_update(regulator->da9055, info->conf.reg, | |
290 | info->conf.sel_mask, DA9055_SEL_REG_A); | |
291 | if (ret < 0) | |
292 | return ret; | |
293 | ||
294 | /* Set the voltage */ | |
369cf602 AL |
295 | return da9055_reg_update(regulator->da9055, info->volt.reg_a, |
296 | info->volt.v_mask, selector); | |
f6130be6 AJ |
297 | } |
298 | ||
299 | /* | |
300 | * Here regulator register set A/B is selected through GPIO. | |
301 | * Therefore we first determine the selected register set A/B and | |
302 | * then set the desired voltage for that register set A/B. | |
303 | */ | |
304 | ret = da9055_reg_read(regulator->da9055, info->conf.reg); | |
305 | if (ret < 0) | |
306 | return ret; | |
307 | ||
308 | ret &= info->conf.sel_mask; | |
309 | ||
310 | /* Set the voltage */ | |
311 | if (ret == DA9055_REGUALTOR_SET_A) | |
369cf602 AL |
312 | return da9055_reg_update(regulator->da9055, info->volt.reg_a, |
313 | info->volt.v_mask, selector); | |
f6130be6 | 314 | else |
369cf602 AL |
315 | return da9055_reg_update(regulator->da9055, info->volt.reg_b, |
316 | info->volt.v_mask, selector); | |
f6130be6 AJ |
317 | } |
318 | ||
319 | static int da9055_regulator_set_suspend_voltage(struct regulator_dev *rdev, | |
320 | int uV) | |
321 | { | |
322 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
323 | struct da9055_regulator_info *info = regulator->info; | |
324 | int ret; | |
325 | ||
326 | /* Select register set B for suspend voltage ramping. */ | |
327 | if (regulator->reg_rselect == NO_GPIO) { | |
328 | ret = da9055_reg_update(regulator->da9055, info->conf.reg, | |
329 | info->conf.sel_mask, DA9055_SEL_REG_B); | |
330 | if (ret < 0) | |
331 | return ret; | |
332 | } | |
333 | ||
369cf602 | 334 | ret = da9055_map_voltage(rdev, uV, uV); |
f6130be6 AJ |
335 | if (ret < 0) |
336 | return ret; | |
337 | ||
369cf602 AL |
338 | return da9055_reg_update(regulator->da9055, info->volt.reg_b, |
339 | info->volt.v_mask, ret); | |
f6130be6 AJ |
340 | } |
341 | ||
342 | static int da9055_suspend_enable(struct regulator_dev *rdev) | |
343 | { | |
344 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
345 | struct da9055_regulator_info *info = regulator->info; | |
346 | ||
347 | /* Select register set B for voltage ramping. */ | |
348 | if (regulator->reg_rselect == NO_GPIO) | |
349 | return da9055_reg_update(regulator->da9055, info->conf.reg, | |
350 | info->conf.sel_mask, DA9055_SEL_REG_B); | |
351 | else | |
352 | return 0; | |
353 | } | |
354 | ||
355 | static int da9055_suspend_disable(struct regulator_dev *rdev) | |
356 | { | |
357 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
358 | struct da9055_regulator_info *info = regulator->info; | |
359 | ||
360 | /* Diselect register set B. */ | |
361 | if (regulator->reg_rselect == NO_GPIO) | |
362 | return da9055_reg_update(regulator->da9055, info->conf.reg, | |
363 | info->conf.sel_mask, DA9055_SEL_REG_A); | |
364 | else | |
365 | return 0; | |
366 | } | |
367 | ||
368 | static struct regulator_ops da9055_buck_ops = { | |
369 | .get_mode = da9055_buck_get_mode, | |
370 | .set_mode = da9055_buck_set_mode, | |
371 | ||
372 | .get_current_limit = da9055_buck_get_current_limit, | |
373 | .set_current_limit = da9055_buck_set_current_limit, | |
374 | ||
375 | .get_voltage_sel = da9055_regulator_get_voltage_sel, | |
376 | .set_voltage_sel = da9055_regulator_set_voltage_sel, | |
369cf602 AL |
377 | .list_voltage = da9055_list_voltage, |
378 | .map_voltage = da9055_map_voltage, | |
f6130be6 AJ |
379 | .is_enabled = regulator_is_enabled_regmap, |
380 | .enable = regulator_enable_regmap, | |
381 | .disable = regulator_disable_regmap, | |
382 | ||
383 | .set_suspend_voltage = da9055_regulator_set_suspend_voltage, | |
384 | .set_suspend_enable = da9055_suspend_enable, | |
385 | .set_suspend_disable = da9055_suspend_disable, | |
386 | .set_suspend_mode = da9055_buck_set_mode, | |
387 | }; | |
388 | ||
389 | static struct regulator_ops da9055_ldo_ops = { | |
390 | .get_mode = da9055_ldo_get_mode, | |
391 | .set_mode = da9055_ldo_set_mode, | |
392 | ||
393 | .get_voltage_sel = da9055_regulator_get_voltage_sel, | |
394 | .set_voltage_sel = da9055_regulator_set_voltage_sel, | |
369cf602 AL |
395 | .list_voltage = da9055_list_voltage, |
396 | .map_voltage = da9055_map_voltage, | |
f6130be6 AJ |
397 | .is_enabled = regulator_is_enabled_regmap, |
398 | .enable = regulator_enable_regmap, | |
399 | .disable = regulator_disable_regmap, | |
400 | ||
401 | .set_suspend_voltage = da9055_regulator_set_suspend_voltage, | |
402 | .set_suspend_enable = da9055_suspend_enable, | |
403 | .set_suspend_disable = da9055_suspend_disable, | |
404 | .set_suspend_mode = da9055_ldo_set_mode, | |
405 | ||
406 | }; | |
407 | ||
408 | #define DA9055_LDO(_id, step, min, max, vbits, voffset) \ | |
409 | {\ | |
410 | .reg_desc = {\ | |
411 | .name = #_id,\ | |
412 | .ops = &da9055_ldo_ops,\ | |
413 | .type = REGULATOR_VOLTAGE,\ | |
414 | .id = DA9055_ID_##_id,\ | |
369cf602 | 415 | .n_voltages = (max - min) / step + 1 + (voffset), \ |
f6130be6 AJ |
416 | .enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ |
417 | .enable_mask = 1, \ | |
418 | .min_uV = (min) * 1000,\ | |
419 | .uV_step = (step) * 1000,\ | |
420 | .owner = THIS_MODULE,\ | |
421 | },\ | |
422 | .conf = {\ | |
423 | .reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ | |
424 | .sel_mask = (1 << 4),\ | |
425 | .en_mask = 1,\ | |
426 | },\ | |
427 | .volt = {\ | |
428 | .reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \ | |
429 | .reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \ | |
430 | .sl_shift = 7,\ | |
431 | .v_offset = (voffset),\ | |
432 | .v_mask = (1 << (vbits)) - 1,\ | |
433 | .v_shift = (vbits),\ | |
434 | },\ | |
435 | } | |
436 | ||
437 | #define DA9055_BUCK(_id, step, min, max, vbits, voffset, mbits, sbits) \ | |
438 | {\ | |
439 | .reg_desc = {\ | |
440 | .name = #_id,\ | |
441 | .ops = &da9055_buck_ops,\ | |
442 | .type = REGULATOR_VOLTAGE,\ | |
443 | .id = DA9055_ID_##_id,\ | |
369cf602 | 444 | .n_voltages = (max - min) / step + 1 + (voffset), \ |
f6130be6 AJ |
445 | .enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ |
446 | .enable_mask = 1,\ | |
447 | .min_uV = (min) * 1000,\ | |
448 | .uV_step = (step) * 1000,\ | |
449 | .owner = THIS_MODULE,\ | |
450 | },\ | |
451 | .conf = {\ | |
452 | .reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ | |
453 | .sel_mask = (1 << 4),\ | |
454 | .en_mask = 1,\ | |
455 | },\ | |
456 | .volt = {\ | |
457 | .reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \ | |
458 | .reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \ | |
459 | .sl_shift = 7,\ | |
460 | .v_offset = (voffset),\ | |
461 | .v_mask = (1 << (vbits)) - 1,\ | |
462 | .v_shift = (vbits),\ | |
463 | },\ | |
464 | .mode = {\ | |
465 | .reg = DA9055_REG_BCORE_MODE,\ | |
466 | .mask = (mbits),\ | |
467 | .shift = (sbits),\ | |
468 | },\ | |
469 | } | |
470 | ||
471 | static struct da9055_regulator_info da9055_regulator_info[] = { | |
472 | DA9055_BUCK(BUCK1, 25, 725, 2075, 6, 9, 0xc, 2), | |
473 | DA9055_BUCK(BUCK2, 25, 925, 2500, 6, 0, 3, 0), | |
474 | DA9055_LDO(LDO1, 50, 900, 3300, 6, 2), | |
475 | DA9055_LDO(LDO2, 50, 900, 3300, 6, 3), | |
476 | DA9055_LDO(LDO3, 50, 900, 3300, 6, 2), | |
477 | DA9055_LDO(LDO4, 50, 900, 3300, 6, 2), | |
478 | DA9055_LDO(LDO5, 50, 900, 2750, 6, 2), | |
479 | DA9055_LDO(LDO6, 20, 900, 3300, 7, 0), | |
480 | }; | |
481 | ||
482 | /* | |
483 | * Configures regulator to be controlled either through GPIO 1 or 2. | |
484 | * GPIO can control regulator state and/or select the regulator register | |
485 | * set A/B for voltage ramping. | |
486 | */ | |
487 | static __devinit int da9055_gpio_init(struct da9055_regulator *regulator, | |
488 | struct regulator_config *config, | |
489 | struct da9055_pdata *pdata, int id) | |
490 | { | |
491 | struct da9055_regulator_info *info = regulator->info; | |
492 | int ret = 0; | |
493 | ||
494 | if (pdata->gpio_ren && pdata->gpio_ren[id]) { | |
495 | char name[18]; | |
496 | int gpio_mux = pdata->gpio_ren[id]; | |
497 | ||
498 | config->ena_gpio = pdata->ena_gpio[id]; | |
499 | config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH; | |
500 | config->ena_gpio_invert = 1; | |
501 | ||
502 | /* | |
503 | * GPI pin is muxed with regulator to control the | |
504 | * regulator state. | |
505 | */ | |
506 | sprintf(name, "DA9055 GPI %d", gpio_mux); | |
507 | ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN, | |
508 | name); | |
509 | if (ret < 0) | |
510 | goto err; | |
511 | ||
512 | /* | |
513 | * Let the regulator know that its state is controlled | |
514 | * through GPI. | |
515 | */ | |
516 | ret = da9055_reg_update(regulator->da9055, info->conf.reg, | |
517 | DA9055_E_GPI_MASK, | |
518 | pdata->reg_ren[id] | |
519 | << DA9055_E_GPI_SHIFT); | |
520 | if (ret < 0) | |
521 | goto err; | |
522 | } | |
523 | ||
26cbd307 | 524 | if (pdata->gpio_rsel && pdata->gpio_rsel[id]) { |
f6130be6 AJ |
525 | char name[18]; |
526 | int gpio_mux = pdata->gpio_rsel[id]; | |
527 | ||
528 | regulator->reg_rselect = pdata->reg_rsel[id]; | |
529 | ||
530 | /* | |
531 | * GPI pin is muxed with regulator to select the | |
532 | * regulator register set A/B for voltage ramping. | |
533 | */ | |
534 | sprintf(name, "DA9055 GPI %d", gpio_mux); | |
535 | ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN, | |
536 | name); | |
537 | if (ret < 0) | |
538 | goto err; | |
539 | ||
540 | /* | |
541 | * Let the regulator know that its register set A/B | |
542 | * will be selected through GPI for voltage ramping. | |
543 | */ | |
544 | ret = da9055_reg_update(regulator->da9055, info->conf.reg, | |
545 | DA9055_V_GPI_MASK, | |
546 | pdata->reg_rsel[id] | |
547 | << DA9055_V_GPI_SHIFT); | |
548 | } | |
549 | ||
550 | err: | |
551 | return ret; | |
552 | } | |
553 | ||
554 | static irqreturn_t da9055_ldo5_6_oc_irq(int irq, void *data) | |
555 | { | |
556 | struct da9055_regulator *regulator = data; | |
557 | ||
558 | regulator_notifier_call_chain(regulator->rdev, | |
559 | REGULATOR_EVENT_OVER_CURRENT, NULL); | |
560 | ||
561 | return IRQ_HANDLED; | |
562 | } | |
563 | ||
564 | static inline struct da9055_regulator_info *find_regulator_info(int id) | |
565 | { | |
566 | struct da9055_regulator_info *info; | |
567 | int i; | |
568 | ||
569 | for (i = 0; i < ARRAY_SIZE(da9055_regulator_info); i++) { | |
570 | info = &da9055_regulator_info[i]; | |
571 | if (info->reg_desc.id == id) | |
572 | return info; | |
573 | } | |
574 | ||
575 | return NULL; | |
576 | } | |
577 | ||
578 | static int __devinit da9055_regulator_probe(struct platform_device *pdev) | |
579 | { | |
580 | struct regulator_config config = { }; | |
581 | struct da9055_regulator *regulator; | |
582 | struct da9055 *da9055 = dev_get_drvdata(pdev->dev.parent); | |
583 | struct da9055_pdata *pdata = da9055->dev->platform_data; | |
584 | int ret, irq; | |
585 | ||
586 | if (pdata == NULL || pdata->regulators[pdev->id] == NULL) | |
587 | return -ENODEV; | |
588 | ||
589 | regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9055_regulator), | |
590 | GFP_KERNEL); | |
591 | if (!regulator) | |
592 | return -ENOMEM; | |
593 | ||
594 | regulator->info = find_regulator_info(pdev->id); | |
595 | if (regulator->info == NULL) { | |
596 | dev_err(&pdev->dev, "invalid regulator ID specified\n"); | |
597 | return -EINVAL; | |
598 | } | |
599 | ||
600 | regulator->da9055 = da9055; | |
601 | config.dev = &pdev->dev; | |
602 | config.driver_data = regulator; | |
603 | config.regmap = da9055->regmap; | |
604 | ||
605 | if (pdata && pdata->regulators) | |
606 | config.init_data = pdata->regulators[pdev->id]; | |
607 | ||
608 | ret = da9055_gpio_init(regulator, &config, pdata, pdev->id); | |
609 | if (ret < 0) | |
610 | return ret; | |
611 | ||
612 | regulator->rdev = regulator_register(®ulator->info->reg_desc, | |
613 | &config); | |
614 | if (IS_ERR(regulator->rdev)) { | |
615 | dev_err(&pdev->dev, "Failed to register regulator %s\n", | |
616 | regulator->info->reg_desc.name); | |
617 | ret = PTR_ERR(regulator->rdev); | |
618 | return ret; | |
619 | } | |
620 | ||
621 | /* Only LDO 5 and 6 has got the over current interrupt */ | |
622 | if (pdev->id == DA9055_ID_LDO5 || pdev->id == DA9055_ID_LDO6) { | |
623 | irq = platform_get_irq_byname(pdev, "REGULATOR"); | |
624 | irq = regmap_irq_get_virq(da9055->irq_data, irq); | |
625 | ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, | |
626 | da9055_ldo5_6_oc_irq, | |
627 | IRQF_TRIGGER_HIGH | | |
628 | IRQF_ONESHOT | | |
629 | IRQF_PROBE_SHARED, | |
630 | pdev->name, regulator); | |
631 | if (ret != 0) { | |
632 | if (ret != -EBUSY) { | |
633 | dev_err(&pdev->dev, | |
634 | "Failed to request Regulator IRQ %d: %d\n", | |
635 | irq, ret); | |
636 | goto err_regulator; | |
637 | } | |
638 | } | |
639 | } | |
640 | ||
641 | platform_set_drvdata(pdev, regulator); | |
642 | ||
643 | return 0; | |
644 | ||
645 | err_regulator: | |
646 | regulator_unregister(regulator->rdev); | |
647 | return ret; | |
648 | } | |
649 | ||
650 | static int __devexit da9055_regulator_remove(struct platform_device *pdev) | |
651 | { | |
652 | struct da9055_regulator *regulator = platform_get_drvdata(pdev); | |
653 | ||
654 | regulator_unregister(regulator->rdev); | |
655 | ||
656 | return 0; | |
657 | } | |
658 | ||
659 | static struct platform_driver da9055_regulator_driver = { | |
660 | .probe = da9055_regulator_probe, | |
661 | .remove = __devexit_p(da9055_regulator_remove), | |
662 | .driver = { | |
663 | .name = "da9055-regulator", | |
664 | .owner = THIS_MODULE, | |
665 | }, | |
666 | }; | |
667 | ||
668 | static int __init da9055_regulator_init(void) | |
669 | { | |
670 | return platform_driver_register(&da9055_regulator_driver); | |
671 | } | |
672 | subsys_initcall(da9055_regulator_init); | |
673 | ||
674 | static void __exit da9055_regulator_exit(void) | |
675 | { | |
676 | platform_driver_unregister(&da9055_regulator_driver); | |
677 | } | |
678 | module_exit(da9055_regulator_exit); | |
679 | ||
680 | MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>"); | |
681 | MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9055 PMIC"); | |
682 | MODULE_LICENSE("GPL"); | |
683 | MODULE_ALIAS("platform:da9055-regulator"); |