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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; | |
f6130be6 AJ |
60 | int v_mask; |
61 | int v_shift; | |
62 | }; | |
63 | ||
64 | struct da9055_mode_reg { | |
65 | int reg; | |
66 | int mask; | |
67 | int shift; | |
68 | }; | |
69 | ||
70 | struct da9055_regulator_info { | |
71 | struct regulator_desc reg_desc; | |
72 | struct da9055_conf_reg conf; | |
73 | struct da9055_volt_reg volt; | |
74 | struct da9055_mode_reg mode; | |
75 | }; | |
76 | ||
77 | struct da9055_regulator { | |
78 | struct da9055 *da9055; | |
79 | struct da9055_regulator_info *info; | |
80 | struct regulator_dev *rdev; | |
81 | enum gpio_select reg_rselect; | |
82 | }; | |
83 | ||
84 | static unsigned int da9055_buck_get_mode(struct regulator_dev *rdev) | |
85 | { | |
86 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
87 | struct da9055_regulator_info *info = regulator->info; | |
88 | int ret, mode = 0; | |
89 | ||
90 | ret = da9055_reg_read(regulator->da9055, info->mode.reg); | |
91 | if (ret < 0) | |
92 | return ret; | |
93 | ||
94 | switch ((ret & info->mode.mask) >> info->mode.shift) { | |
95 | case DA9055_BUCK_MODE_SYNC: | |
96 | mode = REGULATOR_MODE_FAST; | |
97 | break; | |
98 | case DA9055_BUCK_MODE_AUTO: | |
99 | mode = REGULATOR_MODE_NORMAL; | |
100 | break; | |
101 | case DA9055_BUCK_MODE_SLEEP: | |
102 | mode = REGULATOR_MODE_STANDBY; | |
103 | break; | |
104 | } | |
105 | ||
106 | return mode; | |
107 | } | |
108 | ||
109 | static int da9055_buck_set_mode(struct regulator_dev *rdev, | |
110 | unsigned int mode) | |
111 | { | |
112 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
113 | struct da9055_regulator_info *info = regulator->info; | |
114 | int val = 0; | |
115 | ||
116 | switch (mode) { | |
117 | case REGULATOR_MODE_FAST: | |
118 | val = DA9055_BUCK_MODE_SYNC << info->mode.shift; | |
119 | break; | |
120 | case REGULATOR_MODE_NORMAL: | |
121 | val = DA9055_BUCK_MODE_AUTO << info->mode.shift; | |
122 | break; | |
123 | case REGULATOR_MODE_STANDBY: | |
124 | val = DA9055_BUCK_MODE_SLEEP << info->mode.shift; | |
125 | break; | |
126 | } | |
127 | ||
128 | return da9055_reg_update(regulator->da9055, info->mode.reg, | |
129 | info->mode.mask, val); | |
130 | } | |
131 | ||
132 | static unsigned int da9055_ldo_get_mode(struct regulator_dev *rdev) | |
133 | { | |
134 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
135 | struct da9055_regulator_info *info = regulator->info; | |
136 | int ret; | |
137 | ||
138 | ret = da9055_reg_read(regulator->da9055, info->volt.reg_b); | |
139 | if (ret < 0) | |
140 | return ret; | |
141 | ||
142 | if (ret >> info->volt.sl_shift) | |
143 | return REGULATOR_MODE_STANDBY; | |
144 | else | |
145 | return REGULATOR_MODE_NORMAL; | |
146 | } | |
147 | ||
148 | static int da9055_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode) | |
149 | { | |
150 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
151 | struct da9055_regulator_info *info = regulator->info; | |
152 | struct da9055_volt_reg volt = info->volt; | |
153 | int val = 0; | |
154 | ||
155 | switch (mode) { | |
156 | case REGULATOR_MODE_NORMAL: | |
157 | case REGULATOR_MODE_FAST: | |
158 | val = DA9055_LDO_MODE_SYNC; | |
159 | break; | |
160 | case REGULATOR_MODE_STANDBY: | |
161 | val = DA9055_LDO_MODE_SLEEP; | |
162 | break; | |
163 | } | |
164 | ||
165 | return da9055_reg_update(regulator->da9055, volt.reg_b, | |
166 | 1 << volt.sl_shift, | |
167 | val << volt.sl_shift); | |
168 | } | |
169 | ||
170 | static int da9055_buck_get_current_limit(struct regulator_dev *rdev) | |
171 | { | |
172 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
173 | struct da9055_regulator_info *info = regulator->info; | |
174 | int ret; | |
175 | ||
176 | ret = da9055_reg_read(regulator->da9055, DA9055_REG_BUCK_LIM); | |
177 | if (ret < 0) | |
178 | return ret; | |
179 | ||
180 | ret &= info->mode.mask; | |
181 | return da9055_current_limits[ret >> info->mode.shift]; | |
182 | } | |
183 | ||
184 | static int da9055_buck_set_current_limit(struct regulator_dev *rdev, int min_uA, | |
185 | int max_uA) | |
186 | { | |
187 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
188 | struct da9055_regulator_info *info = regulator->info; | |
f509fd46 AL |
189 | int i; |
190 | ||
191 | for (i = ARRAY_SIZE(da9055_current_limits) - 1; i >= 0; i--) { | |
192 | if ((min_uA <= da9055_current_limits[i]) && | |
193 | (da9055_current_limits[i] <= max_uA)) | |
194 | return da9055_reg_update(regulator->da9055, | |
195 | DA9055_REG_BUCK_LIM, | |
196 | info->mode.mask, | |
197 | i << info->mode.shift); | |
f6130be6 AJ |
198 | } |
199 | ||
f509fd46 | 200 | return -EINVAL; |
f6130be6 AJ |
201 | } |
202 | ||
203 | static int da9055_regulator_get_voltage_sel(struct regulator_dev *rdev) | |
204 | { | |
205 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
206 | struct da9055_regulator_info *info = regulator->info; | |
207 | struct da9055_volt_reg volt = info->volt; | |
208 | int ret, sel; | |
209 | ||
210 | /* | |
211 | * There are two voltage register set A & B for voltage ramping but | |
212 | * either one of then can be active therefore we first determine | |
213 | * the active register set. | |
214 | */ | |
215 | ret = da9055_reg_read(regulator->da9055, info->conf.reg); | |
216 | if (ret < 0) | |
217 | return ret; | |
218 | ||
219 | ret &= info->conf.sel_mask; | |
220 | ||
221 | /* Get the voltage for the active register set A/B */ | |
222 | if (ret == DA9055_REGUALTOR_SET_A) | |
223 | ret = da9055_reg_read(regulator->da9055, volt.reg_a); | |
224 | else | |
225 | ret = da9055_reg_read(regulator->da9055, volt.reg_b); | |
226 | ||
227 | if (ret < 0) | |
228 | return ret; | |
229 | ||
230 | sel = (ret & volt.v_mask); | |
6b1f8a45 | 231 | return sel; |
f6130be6 AJ |
232 | } |
233 | ||
f6130be6 AJ |
234 | static int da9055_regulator_set_voltage_sel(struct regulator_dev *rdev, |
235 | unsigned int selector) | |
236 | { | |
237 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
238 | struct da9055_regulator_info *info = regulator->info; | |
239 | int ret; | |
240 | ||
241 | /* | |
242 | * Regulator register set A/B is not selected through GPIO therefore | |
243 | * we use default register set A for voltage ramping. | |
244 | */ | |
245 | if (regulator->reg_rselect == NO_GPIO) { | |
246 | /* Select register set A */ | |
247 | ret = da9055_reg_update(regulator->da9055, info->conf.reg, | |
248 | info->conf.sel_mask, DA9055_SEL_REG_A); | |
249 | if (ret < 0) | |
250 | return ret; | |
251 | ||
252 | /* Set the voltage */ | |
369cf602 AL |
253 | return da9055_reg_update(regulator->da9055, info->volt.reg_a, |
254 | info->volt.v_mask, selector); | |
f6130be6 AJ |
255 | } |
256 | ||
257 | /* | |
258 | * Here regulator register set A/B is selected through GPIO. | |
259 | * Therefore we first determine the selected register set A/B and | |
260 | * then set the desired voltage for that register set A/B. | |
261 | */ | |
262 | ret = da9055_reg_read(regulator->da9055, info->conf.reg); | |
263 | if (ret < 0) | |
264 | return ret; | |
265 | ||
266 | ret &= info->conf.sel_mask; | |
267 | ||
268 | /* Set the voltage */ | |
269 | if (ret == DA9055_REGUALTOR_SET_A) | |
369cf602 AL |
270 | return da9055_reg_update(regulator->da9055, info->volt.reg_a, |
271 | info->volt.v_mask, selector); | |
f6130be6 | 272 | else |
369cf602 AL |
273 | return da9055_reg_update(regulator->da9055, info->volt.reg_b, |
274 | info->volt.v_mask, selector); | |
f6130be6 AJ |
275 | } |
276 | ||
277 | static int da9055_regulator_set_suspend_voltage(struct regulator_dev *rdev, | |
278 | int uV) | |
279 | { | |
280 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
281 | struct da9055_regulator_info *info = regulator->info; | |
282 | int ret; | |
283 | ||
284 | /* Select register set B for suspend voltage ramping. */ | |
285 | if (regulator->reg_rselect == NO_GPIO) { | |
286 | ret = da9055_reg_update(regulator->da9055, info->conf.reg, | |
287 | info->conf.sel_mask, DA9055_SEL_REG_B); | |
288 | if (ret < 0) | |
289 | return ret; | |
290 | } | |
291 | ||
6b1f8a45 | 292 | ret = regulator_map_voltage_linear(rdev, uV, uV); |
f6130be6 AJ |
293 | if (ret < 0) |
294 | return ret; | |
295 | ||
369cf602 AL |
296 | return da9055_reg_update(regulator->da9055, info->volt.reg_b, |
297 | info->volt.v_mask, ret); | |
f6130be6 AJ |
298 | } |
299 | ||
300 | static int da9055_suspend_enable(struct regulator_dev *rdev) | |
301 | { | |
302 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
303 | struct da9055_regulator_info *info = regulator->info; | |
304 | ||
305 | /* Select register set B for voltage ramping. */ | |
306 | if (regulator->reg_rselect == NO_GPIO) | |
307 | return da9055_reg_update(regulator->da9055, info->conf.reg, | |
308 | info->conf.sel_mask, DA9055_SEL_REG_B); | |
309 | else | |
310 | return 0; | |
311 | } | |
312 | ||
313 | static int da9055_suspend_disable(struct regulator_dev *rdev) | |
314 | { | |
315 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
316 | struct da9055_regulator_info *info = regulator->info; | |
317 | ||
318 | /* Diselect register set B. */ | |
319 | if (regulator->reg_rselect == NO_GPIO) | |
320 | return da9055_reg_update(regulator->da9055, info->conf.reg, | |
321 | info->conf.sel_mask, DA9055_SEL_REG_A); | |
322 | else | |
323 | return 0; | |
324 | } | |
325 | ||
326 | static struct regulator_ops da9055_buck_ops = { | |
327 | .get_mode = da9055_buck_get_mode, | |
328 | .set_mode = da9055_buck_set_mode, | |
329 | ||
330 | .get_current_limit = da9055_buck_get_current_limit, | |
331 | .set_current_limit = da9055_buck_set_current_limit, | |
332 | ||
333 | .get_voltage_sel = da9055_regulator_get_voltage_sel, | |
334 | .set_voltage_sel = da9055_regulator_set_voltage_sel, | |
6b1f8a45 AL |
335 | .list_voltage = regulator_list_voltage_linear, |
336 | .map_voltage = regulator_map_voltage_linear, | |
f6130be6 AJ |
337 | .is_enabled = regulator_is_enabled_regmap, |
338 | .enable = regulator_enable_regmap, | |
339 | .disable = regulator_disable_regmap, | |
340 | ||
341 | .set_suspend_voltage = da9055_regulator_set_suspend_voltage, | |
342 | .set_suspend_enable = da9055_suspend_enable, | |
343 | .set_suspend_disable = da9055_suspend_disable, | |
344 | .set_suspend_mode = da9055_buck_set_mode, | |
345 | }; | |
346 | ||
347 | static struct regulator_ops da9055_ldo_ops = { | |
348 | .get_mode = da9055_ldo_get_mode, | |
349 | .set_mode = da9055_ldo_set_mode, | |
350 | ||
351 | .get_voltage_sel = da9055_regulator_get_voltage_sel, | |
352 | .set_voltage_sel = da9055_regulator_set_voltage_sel, | |
6b1f8a45 AL |
353 | .list_voltage = regulator_list_voltage_linear, |
354 | .map_voltage = regulator_map_voltage_linear, | |
f6130be6 AJ |
355 | .is_enabled = regulator_is_enabled_regmap, |
356 | .enable = regulator_enable_regmap, | |
357 | .disable = regulator_disable_regmap, | |
358 | ||
359 | .set_suspend_voltage = da9055_regulator_set_suspend_voltage, | |
360 | .set_suspend_enable = da9055_suspend_enable, | |
361 | .set_suspend_disable = da9055_suspend_disable, | |
362 | .set_suspend_mode = da9055_ldo_set_mode, | |
363 | ||
364 | }; | |
365 | ||
366 | #define DA9055_LDO(_id, step, min, max, vbits, voffset) \ | |
367 | {\ | |
368 | .reg_desc = {\ | |
369 | .name = #_id,\ | |
370 | .ops = &da9055_ldo_ops,\ | |
371 | .type = REGULATOR_VOLTAGE,\ | |
372 | .id = DA9055_ID_##_id,\ | |
369cf602 | 373 | .n_voltages = (max - min) / step + 1 + (voffset), \ |
f6130be6 AJ |
374 | .enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ |
375 | .enable_mask = 1, \ | |
376 | .min_uV = (min) * 1000,\ | |
377 | .uV_step = (step) * 1000,\ | |
6b1f8a45 | 378 | .linear_min_sel = (voffset),\ |
f6130be6 AJ |
379 | .owner = THIS_MODULE,\ |
380 | },\ | |
381 | .conf = {\ | |
382 | .reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ | |
383 | .sel_mask = (1 << 4),\ | |
384 | .en_mask = 1,\ | |
385 | },\ | |
386 | .volt = {\ | |
387 | .reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \ | |
388 | .reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \ | |
389 | .sl_shift = 7,\ | |
f6130be6 AJ |
390 | .v_mask = (1 << (vbits)) - 1,\ |
391 | .v_shift = (vbits),\ | |
392 | },\ | |
393 | } | |
394 | ||
395 | #define DA9055_BUCK(_id, step, min, max, vbits, voffset, mbits, sbits) \ | |
396 | {\ | |
397 | .reg_desc = {\ | |
398 | .name = #_id,\ | |
399 | .ops = &da9055_buck_ops,\ | |
400 | .type = REGULATOR_VOLTAGE,\ | |
401 | .id = DA9055_ID_##_id,\ | |
369cf602 | 402 | .n_voltages = (max - min) / step + 1 + (voffset), \ |
f6130be6 AJ |
403 | .enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ |
404 | .enable_mask = 1,\ | |
405 | .min_uV = (min) * 1000,\ | |
406 | .uV_step = (step) * 1000,\ | |
6b1f8a45 | 407 | .linear_min_sel = (voffset),\ |
f6130be6 AJ |
408 | .owner = THIS_MODULE,\ |
409 | },\ | |
410 | .conf = {\ | |
411 | .reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ | |
412 | .sel_mask = (1 << 4),\ | |
413 | .en_mask = 1,\ | |
414 | },\ | |
415 | .volt = {\ | |
416 | .reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \ | |
417 | .reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \ | |
418 | .sl_shift = 7,\ | |
f6130be6 AJ |
419 | .v_mask = (1 << (vbits)) - 1,\ |
420 | .v_shift = (vbits),\ | |
421 | },\ | |
422 | .mode = {\ | |
423 | .reg = DA9055_REG_BCORE_MODE,\ | |
424 | .mask = (mbits),\ | |
425 | .shift = (sbits),\ | |
426 | },\ | |
427 | } | |
428 | ||
429 | static struct da9055_regulator_info da9055_regulator_info[] = { | |
430 | DA9055_BUCK(BUCK1, 25, 725, 2075, 6, 9, 0xc, 2), | |
431 | DA9055_BUCK(BUCK2, 25, 925, 2500, 6, 0, 3, 0), | |
432 | DA9055_LDO(LDO1, 50, 900, 3300, 6, 2), | |
433 | DA9055_LDO(LDO2, 50, 900, 3300, 6, 3), | |
434 | DA9055_LDO(LDO3, 50, 900, 3300, 6, 2), | |
435 | DA9055_LDO(LDO4, 50, 900, 3300, 6, 2), | |
436 | DA9055_LDO(LDO5, 50, 900, 2750, 6, 2), | |
437 | DA9055_LDO(LDO6, 20, 900, 3300, 7, 0), | |
438 | }; | |
439 | ||
440 | /* | |
441 | * Configures regulator to be controlled either through GPIO 1 or 2. | |
442 | * GPIO can control regulator state and/or select the regulator register | |
443 | * set A/B for voltage ramping. | |
444 | */ | |
445 | static __devinit int da9055_gpio_init(struct da9055_regulator *regulator, | |
446 | struct regulator_config *config, | |
447 | struct da9055_pdata *pdata, int id) | |
448 | { | |
449 | struct da9055_regulator_info *info = regulator->info; | |
450 | int ret = 0; | |
451 | ||
452 | if (pdata->gpio_ren && pdata->gpio_ren[id]) { | |
453 | char name[18]; | |
454 | int gpio_mux = pdata->gpio_ren[id]; | |
455 | ||
456 | config->ena_gpio = pdata->ena_gpio[id]; | |
457 | config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH; | |
458 | config->ena_gpio_invert = 1; | |
459 | ||
460 | /* | |
461 | * GPI pin is muxed with regulator to control the | |
462 | * regulator state. | |
463 | */ | |
464 | sprintf(name, "DA9055 GPI %d", gpio_mux); | |
465 | ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN, | |
466 | name); | |
467 | if (ret < 0) | |
468 | goto err; | |
469 | ||
470 | /* | |
471 | * Let the regulator know that its state is controlled | |
472 | * through GPI. | |
473 | */ | |
474 | ret = da9055_reg_update(regulator->da9055, info->conf.reg, | |
475 | DA9055_E_GPI_MASK, | |
476 | pdata->reg_ren[id] | |
477 | << DA9055_E_GPI_SHIFT); | |
478 | if (ret < 0) | |
479 | goto err; | |
480 | } | |
481 | ||
26cbd307 | 482 | if (pdata->gpio_rsel && pdata->gpio_rsel[id]) { |
f6130be6 AJ |
483 | char name[18]; |
484 | int gpio_mux = pdata->gpio_rsel[id]; | |
485 | ||
486 | regulator->reg_rselect = pdata->reg_rsel[id]; | |
487 | ||
488 | /* | |
489 | * GPI pin is muxed with regulator to select the | |
490 | * regulator register set A/B for voltage ramping. | |
491 | */ | |
492 | sprintf(name, "DA9055 GPI %d", gpio_mux); | |
493 | ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN, | |
494 | name); | |
495 | if (ret < 0) | |
496 | goto err; | |
497 | ||
498 | /* | |
499 | * Let the regulator know that its register set A/B | |
500 | * will be selected through GPI for voltage ramping. | |
501 | */ | |
502 | ret = da9055_reg_update(regulator->da9055, info->conf.reg, | |
503 | DA9055_V_GPI_MASK, | |
504 | pdata->reg_rsel[id] | |
505 | << DA9055_V_GPI_SHIFT); | |
506 | } | |
507 | ||
508 | err: | |
509 | return ret; | |
510 | } | |
511 | ||
512 | static irqreturn_t da9055_ldo5_6_oc_irq(int irq, void *data) | |
513 | { | |
514 | struct da9055_regulator *regulator = data; | |
515 | ||
516 | regulator_notifier_call_chain(regulator->rdev, | |
517 | REGULATOR_EVENT_OVER_CURRENT, NULL); | |
518 | ||
519 | return IRQ_HANDLED; | |
520 | } | |
521 | ||
522 | static inline struct da9055_regulator_info *find_regulator_info(int id) | |
523 | { | |
524 | struct da9055_regulator_info *info; | |
525 | int i; | |
526 | ||
527 | for (i = 0; i < ARRAY_SIZE(da9055_regulator_info); i++) { | |
528 | info = &da9055_regulator_info[i]; | |
529 | if (info->reg_desc.id == id) | |
530 | return info; | |
531 | } | |
532 | ||
533 | return NULL; | |
534 | } | |
535 | ||
536 | static int __devinit da9055_regulator_probe(struct platform_device *pdev) | |
537 | { | |
538 | struct regulator_config config = { }; | |
539 | struct da9055_regulator *regulator; | |
540 | struct da9055 *da9055 = dev_get_drvdata(pdev->dev.parent); | |
541 | struct da9055_pdata *pdata = da9055->dev->platform_data; | |
542 | int ret, irq; | |
543 | ||
544 | if (pdata == NULL || pdata->regulators[pdev->id] == NULL) | |
545 | return -ENODEV; | |
546 | ||
547 | regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9055_regulator), | |
548 | GFP_KERNEL); | |
549 | if (!regulator) | |
550 | return -ENOMEM; | |
551 | ||
552 | regulator->info = find_regulator_info(pdev->id); | |
553 | if (regulator->info == NULL) { | |
554 | dev_err(&pdev->dev, "invalid regulator ID specified\n"); | |
555 | return -EINVAL; | |
556 | } | |
557 | ||
558 | regulator->da9055 = da9055; | |
559 | config.dev = &pdev->dev; | |
560 | config.driver_data = regulator; | |
561 | config.regmap = da9055->regmap; | |
562 | ||
563 | if (pdata && pdata->regulators) | |
564 | config.init_data = pdata->regulators[pdev->id]; | |
565 | ||
566 | ret = da9055_gpio_init(regulator, &config, pdata, pdev->id); | |
567 | if (ret < 0) | |
568 | return ret; | |
569 | ||
570 | regulator->rdev = regulator_register(®ulator->info->reg_desc, | |
571 | &config); | |
572 | if (IS_ERR(regulator->rdev)) { | |
573 | dev_err(&pdev->dev, "Failed to register regulator %s\n", | |
574 | regulator->info->reg_desc.name); | |
575 | ret = PTR_ERR(regulator->rdev); | |
576 | return ret; | |
577 | } | |
578 | ||
579 | /* Only LDO 5 and 6 has got the over current interrupt */ | |
580 | if (pdev->id == DA9055_ID_LDO5 || pdev->id == DA9055_ID_LDO6) { | |
581 | irq = platform_get_irq_byname(pdev, "REGULATOR"); | |
582 | irq = regmap_irq_get_virq(da9055->irq_data, irq); | |
583 | ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, | |
584 | da9055_ldo5_6_oc_irq, | |
585 | IRQF_TRIGGER_HIGH | | |
586 | IRQF_ONESHOT | | |
587 | IRQF_PROBE_SHARED, | |
588 | pdev->name, regulator); | |
589 | if (ret != 0) { | |
590 | if (ret != -EBUSY) { | |
591 | dev_err(&pdev->dev, | |
592 | "Failed to request Regulator IRQ %d: %d\n", | |
593 | irq, ret); | |
594 | goto err_regulator; | |
595 | } | |
596 | } | |
597 | } | |
598 | ||
599 | platform_set_drvdata(pdev, regulator); | |
600 | ||
601 | return 0; | |
602 | ||
603 | err_regulator: | |
604 | regulator_unregister(regulator->rdev); | |
605 | return ret; | |
606 | } | |
607 | ||
608 | static int __devexit da9055_regulator_remove(struct platform_device *pdev) | |
609 | { | |
610 | struct da9055_regulator *regulator = platform_get_drvdata(pdev); | |
611 | ||
612 | regulator_unregister(regulator->rdev); | |
613 | ||
614 | return 0; | |
615 | } | |
616 | ||
617 | static struct platform_driver da9055_regulator_driver = { | |
618 | .probe = da9055_regulator_probe, | |
619 | .remove = __devexit_p(da9055_regulator_remove), | |
620 | .driver = { | |
621 | .name = "da9055-regulator", | |
622 | .owner = THIS_MODULE, | |
623 | }, | |
624 | }; | |
625 | ||
626 | static int __init da9055_regulator_init(void) | |
627 | { | |
628 | return platform_driver_register(&da9055_regulator_driver); | |
629 | } | |
630 | subsys_initcall(da9055_regulator_init); | |
631 | ||
632 | static void __exit da9055_regulator_exit(void) | |
633 | { | |
634 | platform_driver_unregister(&da9055_regulator_driver); | |
635 | } | |
636 | module_exit(da9055_regulator_exit); | |
637 | ||
638 | MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>"); | |
639 | MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9055 PMIC"); | |
640 | MODULE_LICENSE("GPL"); | |
641 | MODULE_ALIAS("platform:da9055-regulator"); |