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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> | |
8b61a28d AT |
22 | #include <linux/of.h> |
23 | #include <linux/regulator/of_regulator.h> | |
f6130be6 AJ |
24 | |
25 | #include <linux/mfd/da9055/core.h> | |
26 | #include <linux/mfd/da9055/reg.h> | |
27 | #include <linux/mfd/da9055/pdata.h> | |
28 | ||
29 | #define DA9055_MIN_UA 0 | |
30 | #define DA9055_MAX_UA 3 | |
31 | ||
32 | #define DA9055_LDO_MODE_SYNC 0 | |
33 | #define DA9055_LDO_MODE_SLEEP 1 | |
34 | ||
35 | #define DA9055_BUCK_MODE_SLEEP 1 | |
36 | #define DA9055_BUCK_MODE_SYNC 2 | |
37 | #define DA9055_BUCK_MODE_AUTO 3 | |
38 | ||
39 | /* DA9055 REGULATOR IDs */ | |
40 | #define DA9055_ID_BUCK1 0 | |
41 | #define DA9055_ID_BUCK2 1 | |
42 | #define DA9055_ID_LDO1 2 | |
43 | #define DA9055_ID_LDO2 3 | |
44 | #define DA9055_ID_LDO3 4 | |
45 | #define DA9055_ID_LDO4 5 | |
46 | #define DA9055_ID_LDO5 6 | |
47 | #define DA9055_ID_LDO6 7 | |
48 | ||
49 | /* DA9055 BUCK current limit */ | |
50 | static const int da9055_current_limits[] = { 500000, 600000, 700000, 800000 }; | |
51 | ||
52 | struct da9055_conf_reg { | |
53 | int reg; | |
54 | int sel_mask; | |
55 | int en_mask; | |
56 | }; | |
57 | ||
58 | struct da9055_volt_reg { | |
59 | int reg_a; | |
60 | int reg_b; | |
61 | int sl_shift; | |
f6130be6 | 62 | int v_mask; |
f6130be6 AJ |
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; | |
f509fd46 AL |
190 | int i; |
191 | ||
192 | for (i = ARRAY_SIZE(da9055_current_limits) - 1; i >= 0; i--) { | |
193 | if ((min_uA <= da9055_current_limits[i]) && | |
194 | (da9055_current_limits[i] <= max_uA)) | |
195 | return da9055_reg_update(regulator->da9055, | |
196 | DA9055_REG_BUCK_LIM, | |
197 | info->mode.mask, | |
198 | i << info->mode.shift); | |
f6130be6 AJ |
199 | } |
200 | ||
f509fd46 | 201 | return -EINVAL; |
f6130be6 AJ |
202 | } |
203 | ||
204 | static int da9055_regulator_get_voltage_sel(struct regulator_dev *rdev) | |
205 | { | |
206 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
207 | struct da9055_regulator_info *info = regulator->info; | |
208 | struct da9055_volt_reg volt = info->volt; | |
209 | int ret, sel; | |
210 | ||
211 | /* | |
212 | * There are two voltage register set A & B for voltage ramping but | |
213 | * either one of then can be active therefore we first determine | |
214 | * the active register set. | |
215 | */ | |
216 | ret = da9055_reg_read(regulator->da9055, info->conf.reg); | |
217 | if (ret < 0) | |
218 | return ret; | |
219 | ||
220 | ret &= info->conf.sel_mask; | |
221 | ||
222 | /* Get the voltage for the active register set A/B */ | |
223 | if (ret == DA9055_REGUALTOR_SET_A) | |
224 | ret = da9055_reg_read(regulator->da9055, volt.reg_a); | |
225 | else | |
226 | ret = da9055_reg_read(regulator->da9055, volt.reg_b); | |
227 | ||
228 | if (ret < 0) | |
229 | return ret; | |
230 | ||
231 | sel = (ret & volt.v_mask); | |
6b1f8a45 | 232 | return sel; |
f6130be6 AJ |
233 | } |
234 | ||
f6130be6 AJ |
235 | static int da9055_regulator_set_voltage_sel(struct regulator_dev *rdev, |
236 | unsigned int selector) | |
237 | { | |
238 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
239 | struct da9055_regulator_info *info = regulator->info; | |
240 | int ret; | |
241 | ||
242 | /* | |
243 | * Regulator register set A/B is not selected through GPIO therefore | |
244 | * we use default register set A for voltage ramping. | |
245 | */ | |
246 | if (regulator->reg_rselect == NO_GPIO) { | |
247 | /* Select register set A */ | |
248 | ret = da9055_reg_update(regulator->da9055, info->conf.reg, | |
249 | info->conf.sel_mask, DA9055_SEL_REG_A); | |
250 | if (ret < 0) | |
251 | return ret; | |
252 | ||
253 | /* Set the voltage */ | |
369cf602 AL |
254 | return da9055_reg_update(regulator->da9055, info->volt.reg_a, |
255 | info->volt.v_mask, selector); | |
f6130be6 AJ |
256 | } |
257 | ||
258 | /* | |
259 | * Here regulator register set A/B is selected through GPIO. | |
260 | * Therefore we first determine the selected register set A/B and | |
261 | * then set the desired voltage for that register set A/B. | |
262 | */ | |
263 | ret = da9055_reg_read(regulator->da9055, info->conf.reg); | |
264 | if (ret < 0) | |
265 | return ret; | |
266 | ||
267 | ret &= info->conf.sel_mask; | |
268 | ||
269 | /* Set the voltage */ | |
270 | if (ret == DA9055_REGUALTOR_SET_A) | |
369cf602 AL |
271 | return da9055_reg_update(regulator->da9055, info->volt.reg_a, |
272 | info->volt.v_mask, selector); | |
f6130be6 | 273 | else |
369cf602 AL |
274 | return da9055_reg_update(regulator->da9055, info->volt.reg_b, |
275 | info->volt.v_mask, selector); | |
f6130be6 AJ |
276 | } |
277 | ||
278 | static int da9055_regulator_set_suspend_voltage(struct regulator_dev *rdev, | |
279 | int uV) | |
280 | { | |
281 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
282 | struct da9055_regulator_info *info = regulator->info; | |
283 | int ret; | |
284 | ||
285 | /* Select register set B for suspend voltage ramping. */ | |
286 | if (regulator->reg_rselect == NO_GPIO) { | |
287 | ret = da9055_reg_update(regulator->da9055, info->conf.reg, | |
288 | info->conf.sel_mask, DA9055_SEL_REG_B); | |
289 | if (ret < 0) | |
290 | return ret; | |
291 | } | |
292 | ||
6b1f8a45 | 293 | ret = regulator_map_voltage_linear(rdev, uV, uV); |
f6130be6 AJ |
294 | if (ret < 0) |
295 | return ret; | |
296 | ||
369cf602 AL |
297 | return da9055_reg_update(regulator->da9055, info->volt.reg_b, |
298 | info->volt.v_mask, ret); | |
f6130be6 AJ |
299 | } |
300 | ||
301 | static int da9055_suspend_enable(struct regulator_dev *rdev) | |
302 | { | |
303 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
304 | struct da9055_regulator_info *info = regulator->info; | |
305 | ||
306 | /* Select register set B for voltage ramping. */ | |
307 | if (regulator->reg_rselect == NO_GPIO) | |
308 | return da9055_reg_update(regulator->da9055, info->conf.reg, | |
309 | info->conf.sel_mask, DA9055_SEL_REG_B); | |
310 | else | |
311 | return 0; | |
312 | } | |
313 | ||
314 | static int da9055_suspend_disable(struct regulator_dev *rdev) | |
315 | { | |
316 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); | |
317 | struct da9055_regulator_info *info = regulator->info; | |
318 | ||
319 | /* Diselect register set B. */ | |
320 | if (regulator->reg_rselect == NO_GPIO) | |
321 | return da9055_reg_update(regulator->da9055, info->conf.reg, | |
322 | info->conf.sel_mask, DA9055_SEL_REG_A); | |
323 | else | |
324 | return 0; | |
325 | } | |
326 | ||
327 | static struct regulator_ops da9055_buck_ops = { | |
328 | .get_mode = da9055_buck_get_mode, | |
329 | .set_mode = da9055_buck_set_mode, | |
330 | ||
331 | .get_current_limit = da9055_buck_get_current_limit, | |
332 | .set_current_limit = da9055_buck_set_current_limit, | |
333 | ||
334 | .get_voltage_sel = da9055_regulator_get_voltage_sel, | |
335 | .set_voltage_sel = da9055_regulator_set_voltage_sel, | |
6b1f8a45 AL |
336 | .list_voltage = regulator_list_voltage_linear, |
337 | .map_voltage = regulator_map_voltage_linear, | |
f6130be6 AJ |
338 | .is_enabled = regulator_is_enabled_regmap, |
339 | .enable = regulator_enable_regmap, | |
340 | .disable = regulator_disable_regmap, | |
341 | ||
342 | .set_suspend_voltage = da9055_regulator_set_suspend_voltage, | |
343 | .set_suspend_enable = da9055_suspend_enable, | |
344 | .set_suspend_disable = da9055_suspend_disable, | |
345 | .set_suspend_mode = da9055_buck_set_mode, | |
346 | }; | |
347 | ||
348 | static struct regulator_ops da9055_ldo_ops = { | |
349 | .get_mode = da9055_ldo_get_mode, | |
350 | .set_mode = da9055_ldo_set_mode, | |
351 | ||
352 | .get_voltage_sel = da9055_regulator_get_voltage_sel, | |
353 | .set_voltage_sel = da9055_regulator_set_voltage_sel, | |
6b1f8a45 AL |
354 | .list_voltage = regulator_list_voltage_linear, |
355 | .map_voltage = regulator_map_voltage_linear, | |
f6130be6 AJ |
356 | .is_enabled = regulator_is_enabled_regmap, |
357 | .enable = regulator_enable_regmap, | |
358 | .disable = regulator_disable_regmap, | |
359 | ||
360 | .set_suspend_voltage = da9055_regulator_set_suspend_voltage, | |
361 | .set_suspend_enable = da9055_suspend_enable, | |
362 | .set_suspend_disable = da9055_suspend_disable, | |
363 | .set_suspend_mode = da9055_ldo_set_mode, | |
364 | ||
365 | }; | |
366 | ||
367 | #define DA9055_LDO(_id, step, min, max, vbits, voffset) \ | |
368 | {\ | |
369 | .reg_desc = {\ | |
370 | .name = #_id,\ | |
371 | .ops = &da9055_ldo_ops,\ | |
372 | .type = REGULATOR_VOLTAGE,\ | |
373 | .id = DA9055_ID_##_id,\ | |
369cf602 | 374 | .n_voltages = (max - min) / step + 1 + (voffset), \ |
f6130be6 AJ |
375 | .enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ |
376 | .enable_mask = 1, \ | |
377 | .min_uV = (min) * 1000,\ | |
378 | .uV_step = (step) * 1000,\ | |
6b1f8a45 | 379 | .linear_min_sel = (voffset),\ |
f6130be6 AJ |
380 | .owner = THIS_MODULE,\ |
381 | },\ | |
382 | .conf = {\ | |
383 | .reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ | |
384 | .sel_mask = (1 << 4),\ | |
385 | .en_mask = 1,\ | |
386 | },\ | |
387 | .volt = {\ | |
388 | .reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \ | |
389 | .reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \ | |
390 | .sl_shift = 7,\ | |
f6130be6 | 391 | .v_mask = (1 << (vbits)) - 1,\ |
f6130be6 AJ |
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 | 419 | .v_mask = (1 << (vbits)) - 1,\ |
f6130be6 AJ |
420 | },\ |
421 | .mode = {\ | |
422 | .reg = DA9055_REG_BCORE_MODE,\ | |
423 | .mask = (mbits),\ | |
424 | .shift = (sbits),\ | |
425 | },\ | |
426 | } | |
427 | ||
428 | static struct da9055_regulator_info da9055_regulator_info[] = { | |
429 | DA9055_BUCK(BUCK1, 25, 725, 2075, 6, 9, 0xc, 2), | |
430 | DA9055_BUCK(BUCK2, 25, 925, 2500, 6, 0, 3, 0), | |
431 | DA9055_LDO(LDO1, 50, 900, 3300, 6, 2), | |
432 | DA9055_LDO(LDO2, 50, 900, 3300, 6, 3), | |
433 | DA9055_LDO(LDO3, 50, 900, 3300, 6, 2), | |
434 | DA9055_LDO(LDO4, 50, 900, 3300, 6, 2), | |
435 | DA9055_LDO(LDO5, 50, 900, 2750, 6, 2), | |
436 | DA9055_LDO(LDO6, 20, 900, 3300, 7, 0), | |
437 | }; | |
438 | ||
439 | /* | |
440 | * Configures regulator to be controlled either through GPIO 1 or 2. | |
441 | * GPIO can control regulator state and/or select the regulator register | |
442 | * set A/B for voltage ramping. | |
443 | */ | |
3d68dfe3 GKH |
444 | static int da9055_gpio_init(struct da9055_regulator *regulator, |
445 | struct regulator_config *config, | |
446 | struct da9055_pdata *pdata, int id) | |
f6130be6 AJ |
447 | { |
448 | struct da9055_regulator_info *info = regulator->info; | |
449 | int ret = 0; | |
450 | ||
8b61a28d AT |
451 | if (!pdata) |
452 | return 0; | |
453 | ||
f6130be6 AJ |
454 | if (pdata->gpio_ren && pdata->gpio_ren[id]) { |
455 | char name[18]; | |
456 | int gpio_mux = pdata->gpio_ren[id]; | |
457 | ||
458 | config->ena_gpio = pdata->ena_gpio[id]; | |
459 | config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH; | |
460 | config->ena_gpio_invert = 1; | |
461 | ||
462 | /* | |
463 | * GPI pin is muxed with regulator to control the | |
464 | * regulator state. | |
465 | */ | |
466 | sprintf(name, "DA9055 GPI %d", gpio_mux); | |
467 | ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN, | |
468 | name); | |
469 | if (ret < 0) | |
470 | goto err; | |
471 | ||
472 | /* | |
473 | * Let the regulator know that its state is controlled | |
474 | * through GPI. | |
475 | */ | |
476 | ret = da9055_reg_update(regulator->da9055, info->conf.reg, | |
477 | DA9055_E_GPI_MASK, | |
478 | pdata->reg_ren[id] | |
479 | << DA9055_E_GPI_SHIFT); | |
480 | if (ret < 0) | |
481 | goto err; | |
482 | } | |
483 | ||
26cbd307 | 484 | if (pdata->gpio_rsel && pdata->gpio_rsel[id]) { |
f6130be6 AJ |
485 | char name[18]; |
486 | int gpio_mux = pdata->gpio_rsel[id]; | |
487 | ||
488 | regulator->reg_rselect = pdata->reg_rsel[id]; | |
489 | ||
490 | /* | |
491 | * GPI pin is muxed with regulator to select the | |
492 | * regulator register set A/B for voltage ramping. | |
493 | */ | |
494 | sprintf(name, "DA9055 GPI %d", gpio_mux); | |
495 | ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN, | |
496 | name); | |
497 | if (ret < 0) | |
498 | goto err; | |
499 | ||
500 | /* | |
501 | * Let the regulator know that its register set A/B | |
502 | * will be selected through GPI for voltage ramping. | |
503 | */ | |
504 | ret = da9055_reg_update(regulator->da9055, info->conf.reg, | |
505 | DA9055_V_GPI_MASK, | |
506 | pdata->reg_rsel[id] | |
507 | << DA9055_V_GPI_SHIFT); | |
508 | } | |
509 | ||
510 | err: | |
511 | return ret; | |
512 | } | |
513 | ||
514 | static irqreturn_t da9055_ldo5_6_oc_irq(int irq, void *data) | |
515 | { | |
516 | struct da9055_regulator *regulator = data; | |
517 | ||
518 | regulator_notifier_call_chain(regulator->rdev, | |
519 | REGULATOR_EVENT_OVER_CURRENT, NULL); | |
520 | ||
521 | return IRQ_HANDLED; | |
522 | } | |
523 | ||
524 | static inline struct da9055_regulator_info *find_regulator_info(int id) | |
525 | { | |
526 | struct da9055_regulator_info *info; | |
527 | int i; | |
528 | ||
529 | for (i = 0; i < ARRAY_SIZE(da9055_regulator_info); i++) { | |
530 | info = &da9055_regulator_info[i]; | |
531 | if (info->reg_desc.id == id) | |
532 | return info; | |
533 | } | |
534 | ||
535 | return NULL; | |
536 | } | |
537 | ||
8b61a28d AT |
538 | #ifdef CONFIG_OF |
539 | static struct of_regulator_match da9055_reg_matches[] = { | |
540 | { .name = "BUCK1", }, | |
541 | { .name = "BUCK2", }, | |
542 | { .name = "LDO1", }, | |
543 | { .name = "LDO2", }, | |
544 | { .name = "LDO3", }, | |
545 | { .name = "LDO4", }, | |
546 | { .name = "LDO5", }, | |
547 | { .name = "LDO6", }, | |
548 | }; | |
549 | ||
550 | static int da9055_regulator_dt_init(struct platform_device *pdev, | |
551 | struct da9055_regulator *regulator, | |
552 | struct regulator_config *config, | |
553 | int regid) | |
554 | { | |
555 | struct device_node *nproot, *np; | |
556 | int ret; | |
557 | ||
558 | nproot = of_node_get(pdev->dev.parent->of_node); | |
559 | if (!nproot) | |
560 | return -ENODEV; | |
561 | ||
a4b4e66a | 562 | np = of_get_child_by_name(nproot, "regulators"); |
8b61a28d AT |
563 | if (!np) |
564 | return -ENODEV; | |
565 | ||
566 | ret = of_regulator_match(&pdev->dev, np, &da9055_reg_matches[regid], 1); | |
567 | of_node_put(nproot); | |
568 | if (ret < 0) { | |
569 | dev_err(&pdev->dev, "Error matching regulator: %d\n", ret); | |
fe2eb722 | 570 | return ret; |
8b61a28d AT |
571 | } |
572 | ||
573 | config->init_data = da9055_reg_matches[regid].init_data; | |
574 | config->of_node = da9055_reg_matches[regid].of_node; | |
575 | ||
576 | if (!config->of_node) | |
577 | return -ENODEV; | |
578 | ||
579 | return 0; | |
580 | } | |
581 | #else | |
dae6cdb4 | 582 | static inline int da9055_regulator_dt_init(struct platform_device *pdev, |
8b61a28d AT |
583 | struct da9055_regulator *regulator, |
584 | struct regulator_config *config, | |
585 | int regid) | |
586 | { | |
587 | return -ENODEV; | |
588 | } | |
589 | #endif /* CONFIG_OF */ | |
590 | ||
3d68dfe3 | 591 | static int da9055_regulator_probe(struct platform_device *pdev) |
f6130be6 AJ |
592 | { |
593 | struct regulator_config config = { }; | |
594 | struct da9055_regulator *regulator; | |
595 | struct da9055 *da9055 = dev_get_drvdata(pdev->dev.parent); | |
dff91d0b | 596 | struct da9055_pdata *pdata = dev_get_platdata(da9055->dev); |
f6130be6 AJ |
597 | int ret, irq; |
598 | ||
f6130be6 AJ |
599 | regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9055_regulator), |
600 | GFP_KERNEL); | |
601 | if (!regulator) | |
602 | return -ENOMEM; | |
603 | ||
604 | regulator->info = find_regulator_info(pdev->id); | |
605 | if (regulator->info == NULL) { | |
606 | dev_err(&pdev->dev, "invalid regulator ID specified\n"); | |
607 | return -EINVAL; | |
608 | } | |
609 | ||
610 | regulator->da9055 = da9055; | |
611 | config.dev = &pdev->dev; | |
612 | config.driver_data = regulator; | |
613 | config.regmap = da9055->regmap; | |
614 | ||
8b61a28d | 615 | if (pdata && pdata->regulators) { |
f6130be6 | 616 | config.init_data = pdata->regulators[pdev->id]; |
8b61a28d AT |
617 | } else { |
618 | ret = da9055_regulator_dt_init(pdev, regulator, &config, | |
619 | pdev->id); | |
620 | if (ret < 0) | |
621 | return ret; | |
622 | } | |
f6130be6 AJ |
623 | |
624 | ret = da9055_gpio_init(regulator, &config, pdata, pdev->id); | |
625 | if (ret < 0) | |
626 | return ret; | |
627 | ||
0d328806 AL |
628 | regulator->rdev = devm_regulator_register(&pdev->dev, |
629 | ®ulator->info->reg_desc, | |
630 | &config); | |
f6130be6 AJ |
631 | if (IS_ERR(regulator->rdev)) { |
632 | dev_err(&pdev->dev, "Failed to register regulator %s\n", | |
633 | regulator->info->reg_desc.name); | |
0d328806 | 634 | return PTR_ERR(regulator->rdev); |
f6130be6 AJ |
635 | } |
636 | ||
637 | /* Only LDO 5 and 6 has got the over current interrupt */ | |
638 | if (pdev->id == DA9055_ID_LDO5 || pdev->id == DA9055_ID_LDO6) { | |
639 | irq = platform_get_irq_byname(pdev, "REGULATOR"); | |
f17083c3 AT |
640 | if (irq < 0) |
641 | return irq; | |
642 | ||
f6130be6 AJ |
643 | ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
644 | da9055_ldo5_6_oc_irq, | |
645 | IRQF_TRIGGER_HIGH | | |
646 | IRQF_ONESHOT | | |
647 | IRQF_PROBE_SHARED, | |
648 | pdev->name, regulator); | |
649 | if (ret != 0) { | |
650 | if (ret != -EBUSY) { | |
651 | dev_err(&pdev->dev, | |
652 | "Failed to request Regulator IRQ %d: %d\n", | |
653 | irq, ret); | |
0d328806 | 654 | return ret; |
f6130be6 AJ |
655 | } |
656 | } | |
657 | } | |
658 | ||
659 | platform_set_drvdata(pdev, regulator); | |
660 | ||
f6130be6 AJ |
661 | return 0; |
662 | } | |
663 | ||
664 | static struct platform_driver da9055_regulator_driver = { | |
665 | .probe = da9055_regulator_probe, | |
f6130be6 AJ |
666 | .driver = { |
667 | .name = "da9055-regulator", | |
668 | .owner = THIS_MODULE, | |
669 | }, | |
670 | }; | |
671 | ||
672 | static int __init da9055_regulator_init(void) | |
673 | { | |
674 | return platform_driver_register(&da9055_regulator_driver); | |
675 | } | |
676 | subsys_initcall(da9055_regulator_init); | |
677 | ||
678 | static void __exit da9055_regulator_exit(void) | |
679 | { | |
680 | platform_driver_unregister(&da9055_regulator_driver); | |
681 | } | |
682 | module_exit(da9055_regulator_exit); | |
683 | ||
684 | MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>"); | |
685 | MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9055 PMIC"); | |
686 | MODULE_LICENSE("GPL"); | |
687 | MODULE_ALIAS("platform:da9055-regulator"); |