1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // |
3 | // Regulator driver for DA9055 PMIC |
4 | // |
5 | // Copyright(c) 2012 Dialog Semiconductor Ltd. |
6 | // |
7 | // Author: David Dajun Chen <dchen@diasemi.com> |
8 | |
9 | #include <linux/module.h> |
10 | #include <linux/init.h> |
11 | #include <linux/err.h> |
12 | #include <linux/gpio.h> |
13 | #include <linux/gpio/consumer.h> |
14 | #include <linux/platform_device.h> |
15 | #include <linux/regulator/driver.h> |
16 | #include <linux/regulator/machine.h> |
17 | #include <linux/of.h> |
18 | #include <linux/regulator/of_regulator.h> |
19 | |
20 | #include <linux/mfd/da9055/core.h> |
21 | #include <linux/mfd/da9055/reg.h> |
22 | #include <linux/mfd/da9055/pdata.h> |
23 | |
24 | #define DA9055_MIN_UA 0 |
25 | #define DA9055_MAX_UA 3 |
26 | |
27 | #define DA9055_LDO_MODE_SYNC 0 |
28 | #define DA9055_LDO_MODE_SLEEP 1 |
29 | |
30 | #define DA9055_BUCK_MODE_SLEEP 1 |
31 | #define DA9055_BUCK_MODE_SYNC 2 |
32 | #define DA9055_BUCK_MODE_AUTO 3 |
33 | |
34 | /* DA9055 REGULATOR IDs */ |
35 | #define DA9055_ID_BUCK1 0 |
36 | #define DA9055_ID_BUCK2 1 |
37 | #define DA9055_ID_LDO1 2 |
38 | #define DA9055_ID_LDO2 3 |
39 | #define DA9055_ID_LDO3 4 |
40 | #define DA9055_ID_LDO4 5 |
41 | #define DA9055_ID_LDO5 6 |
42 | #define DA9055_ID_LDO6 7 |
43 | |
44 | /* DA9055 BUCK current limit */ |
45 | static const unsigned int da9055_current_limits[] = { |
46 | 500000, 600000, 700000, 800000 |
47 | }; |
48 | |
49 | struct da9055_conf_reg { |
50 | int reg; |
51 | int sel_mask; |
52 | int en_mask; |
53 | }; |
54 | |
55 | struct da9055_volt_reg { |
56 | int reg_a; |
57 | int reg_b; |
58 | int sl_shift; |
59 | int v_mask; |
60 | }; |
61 | |
62 | struct da9055_mode_reg { |
63 | int reg; |
64 | int mask; |
65 | int shift; |
66 | }; |
67 | |
68 | struct da9055_regulator_info { |
69 | struct regulator_desc reg_desc; |
70 | struct da9055_conf_reg conf; |
71 | struct da9055_volt_reg volt; |
72 | struct da9055_mode_reg mode; |
73 | }; |
74 | |
75 | struct da9055_regulator { |
76 | struct da9055 *da9055; |
77 | struct da9055_regulator_info *info; |
78 | struct regulator_dev *rdev; |
79 | enum gpio_select reg_rselect; |
80 | }; |
81 | |
82 | static unsigned int da9055_buck_get_mode(struct regulator_dev *rdev) |
83 | { |
84 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
85 | struct da9055_regulator_info *info = regulator->info; |
86 | int ret, mode = 0; |
87 | |
88 | ret = da9055_reg_read(da9055: regulator->da9055, reg: info->mode.reg); |
89 | if (ret < 0) |
90 | return ret; |
91 | |
92 | switch ((ret & info->mode.mask) >> info->mode.shift) { |
93 | case DA9055_BUCK_MODE_SYNC: |
94 | mode = REGULATOR_MODE_FAST; |
95 | break; |
96 | case DA9055_BUCK_MODE_AUTO: |
97 | mode = REGULATOR_MODE_NORMAL; |
98 | break; |
99 | case DA9055_BUCK_MODE_SLEEP: |
100 | mode = REGULATOR_MODE_STANDBY; |
101 | break; |
102 | } |
103 | |
104 | return mode; |
105 | } |
106 | |
107 | static int da9055_buck_set_mode(struct regulator_dev *rdev, |
108 | unsigned int mode) |
109 | { |
110 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
111 | struct da9055_regulator_info *info = regulator->info; |
112 | int val = 0; |
113 | |
114 | switch (mode) { |
115 | case REGULATOR_MODE_FAST: |
116 | val = DA9055_BUCK_MODE_SYNC << info->mode.shift; |
117 | break; |
118 | case REGULATOR_MODE_NORMAL: |
119 | val = DA9055_BUCK_MODE_AUTO << info->mode.shift; |
120 | break; |
121 | case REGULATOR_MODE_STANDBY: |
122 | val = DA9055_BUCK_MODE_SLEEP << info->mode.shift; |
123 | break; |
124 | } |
125 | |
126 | return da9055_reg_update(da9055: regulator->da9055, reg: info->mode.reg, |
127 | bit_mask: info->mode.mask, reg_val: val); |
128 | } |
129 | |
130 | static unsigned int da9055_ldo_get_mode(struct regulator_dev *rdev) |
131 | { |
132 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
133 | struct da9055_regulator_info *info = regulator->info; |
134 | int ret; |
135 | |
136 | ret = da9055_reg_read(da9055: regulator->da9055, reg: info->volt.reg_b); |
137 | if (ret < 0) |
138 | return ret; |
139 | |
140 | if (ret >> info->volt.sl_shift) |
141 | return REGULATOR_MODE_STANDBY; |
142 | else |
143 | return REGULATOR_MODE_NORMAL; |
144 | } |
145 | |
146 | static int da9055_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode) |
147 | { |
148 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
149 | struct da9055_regulator_info *info = regulator->info; |
150 | struct da9055_volt_reg volt = info->volt; |
151 | int val = 0; |
152 | |
153 | switch (mode) { |
154 | case REGULATOR_MODE_NORMAL: |
155 | case REGULATOR_MODE_FAST: |
156 | val = DA9055_LDO_MODE_SYNC; |
157 | break; |
158 | case REGULATOR_MODE_STANDBY: |
159 | val = DA9055_LDO_MODE_SLEEP; |
160 | break; |
161 | } |
162 | |
163 | return da9055_reg_update(da9055: regulator->da9055, reg: volt.reg_b, |
164 | bit_mask: 1 << volt.sl_shift, |
165 | reg_val: val << volt.sl_shift); |
166 | } |
167 | |
168 | static int da9055_regulator_get_voltage_sel(struct regulator_dev *rdev) |
169 | { |
170 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
171 | struct da9055_regulator_info *info = regulator->info; |
172 | struct da9055_volt_reg volt = info->volt; |
173 | int ret, sel; |
174 | |
175 | /* |
176 | * There are two voltage register set A & B for voltage ramping but |
177 | * either one of then can be active therefore we first determine |
178 | * the active register set. |
179 | */ |
180 | ret = da9055_reg_read(da9055: regulator->da9055, reg: info->conf.reg); |
181 | if (ret < 0) |
182 | return ret; |
183 | |
184 | ret &= info->conf.sel_mask; |
185 | |
186 | /* Get the voltage for the active register set A/B */ |
187 | if (ret == DA9055_REGUALTOR_SET_A) |
188 | ret = da9055_reg_read(da9055: regulator->da9055, reg: volt.reg_a); |
189 | else |
190 | ret = da9055_reg_read(da9055: regulator->da9055, reg: volt.reg_b); |
191 | |
192 | if (ret < 0) |
193 | return ret; |
194 | |
195 | sel = (ret & volt.v_mask); |
196 | return sel; |
197 | } |
198 | |
199 | static int da9055_regulator_set_voltage_sel(struct regulator_dev *rdev, |
200 | unsigned int selector) |
201 | { |
202 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
203 | struct da9055_regulator_info *info = regulator->info; |
204 | int ret; |
205 | |
206 | /* |
207 | * Regulator register set A/B is not selected through GPIO therefore |
208 | * we use default register set A for voltage ramping. |
209 | */ |
210 | if (regulator->reg_rselect == NO_GPIO) { |
211 | /* Select register set A */ |
212 | ret = da9055_reg_update(da9055: regulator->da9055, reg: info->conf.reg, |
213 | bit_mask: info->conf.sel_mask, DA9055_SEL_REG_A); |
214 | if (ret < 0) |
215 | return ret; |
216 | |
217 | /* Set the voltage */ |
218 | return da9055_reg_update(da9055: regulator->da9055, reg: info->volt.reg_a, |
219 | bit_mask: info->volt.v_mask, reg_val: selector); |
220 | } |
221 | |
222 | /* |
223 | * Here regulator register set A/B is selected through GPIO. |
224 | * Therefore we first determine the selected register set A/B and |
225 | * then set the desired voltage for that register set A/B. |
226 | */ |
227 | ret = da9055_reg_read(da9055: regulator->da9055, reg: info->conf.reg); |
228 | if (ret < 0) |
229 | return ret; |
230 | |
231 | ret &= info->conf.sel_mask; |
232 | |
233 | /* Set the voltage */ |
234 | if (ret == DA9055_REGUALTOR_SET_A) |
235 | return da9055_reg_update(da9055: regulator->da9055, reg: info->volt.reg_a, |
236 | bit_mask: info->volt.v_mask, reg_val: selector); |
237 | else |
238 | return da9055_reg_update(da9055: regulator->da9055, reg: info->volt.reg_b, |
239 | bit_mask: info->volt.v_mask, reg_val: selector); |
240 | } |
241 | |
242 | static int da9055_regulator_set_suspend_voltage(struct regulator_dev *rdev, |
243 | int uV) |
244 | { |
245 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
246 | struct da9055_regulator_info *info = regulator->info; |
247 | int ret; |
248 | |
249 | /* Select register set B for suspend voltage ramping. */ |
250 | if (regulator->reg_rselect == NO_GPIO) { |
251 | ret = da9055_reg_update(da9055: regulator->da9055, reg: info->conf.reg, |
252 | bit_mask: info->conf.sel_mask, DA9055_SEL_REG_B); |
253 | if (ret < 0) |
254 | return ret; |
255 | } |
256 | |
257 | ret = regulator_map_voltage_linear(rdev, min_uV: uV, max_uV: uV); |
258 | if (ret < 0) |
259 | return ret; |
260 | |
261 | return da9055_reg_update(da9055: regulator->da9055, reg: info->volt.reg_b, |
262 | bit_mask: info->volt.v_mask, reg_val: ret); |
263 | } |
264 | |
265 | static int da9055_suspend_enable(struct regulator_dev *rdev) |
266 | { |
267 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
268 | struct da9055_regulator_info *info = regulator->info; |
269 | |
270 | /* Select register set B for voltage ramping. */ |
271 | if (regulator->reg_rselect == NO_GPIO) |
272 | return da9055_reg_update(da9055: regulator->da9055, reg: info->conf.reg, |
273 | bit_mask: info->conf.sel_mask, DA9055_SEL_REG_B); |
274 | else |
275 | return 0; |
276 | } |
277 | |
278 | static int da9055_suspend_disable(struct regulator_dev *rdev) |
279 | { |
280 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
281 | struct da9055_regulator_info *info = regulator->info; |
282 | |
283 | /* Diselect register set B. */ |
284 | if (regulator->reg_rselect == NO_GPIO) |
285 | return da9055_reg_update(da9055: regulator->da9055, reg: info->conf.reg, |
286 | bit_mask: info->conf.sel_mask, DA9055_SEL_REG_A); |
287 | else |
288 | return 0; |
289 | } |
290 | |
291 | static const struct regulator_ops da9055_buck_ops = { |
292 | .get_mode = da9055_buck_get_mode, |
293 | .set_mode = da9055_buck_set_mode, |
294 | |
295 | .get_current_limit = regulator_get_current_limit_regmap, |
296 | .set_current_limit = regulator_set_current_limit_regmap, |
297 | |
298 | .get_voltage_sel = da9055_regulator_get_voltage_sel, |
299 | .set_voltage_sel = da9055_regulator_set_voltage_sel, |
300 | .list_voltage = regulator_list_voltage_linear, |
301 | .map_voltage = regulator_map_voltage_linear, |
302 | .is_enabled = regulator_is_enabled_regmap, |
303 | .enable = regulator_enable_regmap, |
304 | .disable = regulator_disable_regmap, |
305 | |
306 | .set_suspend_voltage = da9055_regulator_set_suspend_voltage, |
307 | .set_suspend_enable = da9055_suspend_enable, |
308 | .set_suspend_disable = da9055_suspend_disable, |
309 | .set_suspend_mode = da9055_buck_set_mode, |
310 | }; |
311 | |
312 | static const struct regulator_ops da9055_ldo_ops = { |
313 | .get_mode = da9055_ldo_get_mode, |
314 | .set_mode = da9055_ldo_set_mode, |
315 | |
316 | .get_voltage_sel = da9055_regulator_get_voltage_sel, |
317 | .set_voltage_sel = da9055_regulator_set_voltage_sel, |
318 | .list_voltage = regulator_list_voltage_linear, |
319 | .map_voltage = regulator_map_voltage_linear, |
320 | .is_enabled = regulator_is_enabled_regmap, |
321 | .enable = regulator_enable_regmap, |
322 | .disable = regulator_disable_regmap, |
323 | |
324 | .set_suspend_voltage = da9055_regulator_set_suspend_voltage, |
325 | .set_suspend_enable = da9055_suspend_enable, |
326 | .set_suspend_disable = da9055_suspend_disable, |
327 | .set_suspend_mode = da9055_ldo_set_mode, |
328 | |
329 | }; |
330 | |
331 | #define DA9055_LDO(_id, step, min, max, vbits, voffset) \ |
332 | {\ |
333 | .reg_desc = {\ |
334 | .name = #_id,\ |
335 | .of_match = of_match_ptr(#_id),\ |
336 | .regulators_node = of_match_ptr("regulators"),\ |
337 | .ops = &da9055_ldo_ops,\ |
338 | .type = REGULATOR_VOLTAGE,\ |
339 | .id = DA9055_ID_##_id,\ |
340 | .n_voltages = (max - min) / step + 1 + (voffset), \ |
341 | .enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ |
342 | .enable_mask = 1, \ |
343 | .min_uV = (min) * 1000,\ |
344 | .uV_step = (step) * 1000,\ |
345 | .linear_min_sel = (voffset),\ |
346 | .owner = THIS_MODULE,\ |
347 | },\ |
348 | .conf = {\ |
349 | .reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ |
350 | .sel_mask = (1 << 4),\ |
351 | .en_mask = 1,\ |
352 | },\ |
353 | .volt = {\ |
354 | .reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \ |
355 | .reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \ |
356 | .sl_shift = 7,\ |
357 | .v_mask = (1 << (vbits)) - 1,\ |
358 | },\ |
359 | } |
360 | |
361 | #define DA9055_BUCK(_id, step, min, max, vbits, voffset, mbits, sbits) \ |
362 | {\ |
363 | .reg_desc = {\ |
364 | .name = #_id,\ |
365 | .of_match = of_match_ptr(#_id),\ |
366 | .regulators_node = of_match_ptr("regulators"),\ |
367 | .ops = &da9055_buck_ops,\ |
368 | .type = REGULATOR_VOLTAGE,\ |
369 | .id = DA9055_ID_##_id,\ |
370 | .n_voltages = (max - min) / step + 1 + (voffset), \ |
371 | .enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ |
372 | .enable_mask = 1,\ |
373 | .min_uV = (min) * 1000,\ |
374 | .uV_step = (step) * 1000,\ |
375 | .linear_min_sel = (voffset),\ |
376 | .owner = THIS_MODULE,\ |
377 | .curr_table = da9055_current_limits,\ |
378 | .n_current_limits = ARRAY_SIZE(da9055_current_limits),\ |
379 | .csel_reg = DA9055_REG_BUCK_LIM,\ |
380 | .csel_mask = (mbits),\ |
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,\ |
391 | .v_mask = (1 << (vbits)) - 1,\ |
392 | },\ |
393 | .mode = {\ |
394 | .reg = DA9055_REG_BCORE_MODE,\ |
395 | .mask = (mbits),\ |
396 | .shift = (sbits),\ |
397 | },\ |
398 | } |
399 | |
400 | static struct da9055_regulator_info da9055_regulator_info[] = { |
401 | DA9055_BUCK(BUCK1, 25, 725, 2075, 6, 9, 0xc, 2), |
402 | DA9055_BUCK(BUCK2, 25, 925, 2500, 6, 0, 3, 0), |
403 | DA9055_LDO(LDO1, 50, 900, 3300, 6, 2), |
404 | DA9055_LDO(LDO2, 50, 900, 3300, 6, 3), |
405 | DA9055_LDO(LDO3, 50, 900, 3300, 6, 2), |
406 | DA9055_LDO(LDO4, 50, 900, 3300, 6, 2), |
407 | DA9055_LDO(LDO5, 50, 900, 2750, 6, 2), |
408 | DA9055_LDO(LDO6, 20, 900, 3300, 7, 0), |
409 | }; |
410 | |
411 | /* |
412 | * Configures regulator to be controlled either through GPIO 1 or 2. |
413 | * GPIO can control regulator state and/or select the regulator register |
414 | * set A/B for voltage ramping. |
415 | */ |
416 | static int da9055_gpio_init(struct da9055_regulator *regulator, |
417 | struct regulator_config *config, |
418 | struct da9055_pdata *pdata, int id) |
419 | { |
420 | struct da9055_regulator_info *info = regulator->info; |
421 | int ret = 0; |
422 | |
423 | if (!pdata) |
424 | return 0; |
425 | |
426 | if (pdata->gpio_ren && pdata->gpio_ren[id]) { |
427 | char name[18]; |
428 | int gpio_mux = pdata->gpio_ren[id]; |
429 | |
430 | config->ena_gpiod = pdata->ena_gpiods[id]; |
431 | |
432 | /* |
433 | * GPI pin is muxed with regulator to control the |
434 | * regulator state. |
435 | */ |
436 | sprintf(buf: name, fmt: "DA9055 GPI %d" , gpio_mux); |
437 | ret = devm_gpio_request_one(dev: config->dev, gpio: gpio_mux, GPIOF_DIR_IN, |
438 | label: name); |
439 | if (ret < 0) |
440 | goto err; |
441 | |
442 | /* |
443 | * Let the regulator know that its state is controlled |
444 | * through GPI. |
445 | */ |
446 | ret = da9055_reg_update(da9055: regulator->da9055, reg: info->conf.reg, |
447 | DA9055_E_GPI_MASK, |
448 | reg_val: pdata->reg_ren[id] |
449 | << DA9055_E_GPI_SHIFT); |
450 | if (ret < 0) |
451 | goto err; |
452 | } |
453 | |
454 | if (pdata->gpio_rsel && pdata->gpio_rsel[id]) { |
455 | char name[18]; |
456 | int gpio_mux = pdata->gpio_rsel[id]; |
457 | |
458 | regulator->reg_rselect = pdata->reg_rsel[id]; |
459 | |
460 | /* |
461 | * GPI pin is muxed with regulator to select the |
462 | * regulator register set A/B for voltage ramping. |
463 | */ |
464 | sprintf(buf: name, fmt: "DA9055 GPI %d" , gpio_mux); |
465 | ret = devm_gpio_request_one(dev: config->dev, gpio: gpio_mux, GPIOF_DIR_IN, |
466 | label: name); |
467 | if (ret < 0) |
468 | goto err; |
469 | |
470 | /* |
471 | * Let the regulator know that its register set A/B |
472 | * will be selected through GPI for voltage ramping. |
473 | */ |
474 | ret = da9055_reg_update(da9055: regulator->da9055, reg: info->conf.reg, |
475 | DA9055_V_GPI_MASK, |
476 | reg_val: pdata->reg_rsel[id] |
477 | << DA9055_V_GPI_SHIFT); |
478 | } |
479 | |
480 | err: |
481 | return ret; |
482 | } |
483 | |
484 | static irqreturn_t da9055_ldo5_6_oc_irq(int irq, void *data) |
485 | { |
486 | struct da9055_regulator *regulator = data; |
487 | |
488 | regulator_notifier_call_chain(rdev: regulator->rdev, |
489 | REGULATOR_EVENT_OVER_CURRENT, NULL); |
490 | |
491 | return IRQ_HANDLED; |
492 | } |
493 | |
494 | static inline struct da9055_regulator_info *find_regulator_info(int id) |
495 | { |
496 | struct da9055_regulator_info *info; |
497 | int i; |
498 | |
499 | for (i = 0; i < ARRAY_SIZE(da9055_regulator_info); i++) { |
500 | info = &da9055_regulator_info[i]; |
501 | if (info->reg_desc.id == id) |
502 | return info; |
503 | } |
504 | |
505 | return NULL; |
506 | } |
507 | |
508 | static int da9055_regulator_probe(struct platform_device *pdev) |
509 | { |
510 | struct regulator_config config = { }; |
511 | struct da9055_regulator *regulator; |
512 | struct da9055 *da9055 = dev_get_drvdata(dev: pdev->dev.parent); |
513 | struct da9055_pdata *pdata = dev_get_platdata(dev: da9055->dev); |
514 | int ret, irq; |
515 | |
516 | regulator = devm_kzalloc(dev: &pdev->dev, size: sizeof(struct da9055_regulator), |
517 | GFP_KERNEL); |
518 | if (!regulator) |
519 | return -ENOMEM; |
520 | |
521 | regulator->info = find_regulator_info(id: pdev->id); |
522 | if (regulator->info == NULL) { |
523 | dev_err(&pdev->dev, "invalid regulator ID specified\n" ); |
524 | return -EINVAL; |
525 | } |
526 | |
527 | regulator->da9055 = da9055; |
528 | config.dev = da9055->dev; |
529 | config.driver_data = regulator; |
530 | config.regmap = da9055->regmap; |
531 | |
532 | if (pdata) |
533 | config.init_data = pdata->regulators[pdev->id]; |
534 | |
535 | ret = da9055_gpio_init(regulator, config: &config, pdata, id: pdev->id); |
536 | if (ret < 0) |
537 | return ret; |
538 | |
539 | regulator->rdev = devm_regulator_register(dev: &pdev->dev, |
540 | regulator_desc: ®ulator->info->reg_desc, |
541 | config: &config); |
542 | if (IS_ERR(ptr: regulator->rdev)) { |
543 | dev_err(&pdev->dev, "Failed to register regulator %s\n" , |
544 | regulator->info->reg_desc.name); |
545 | return PTR_ERR(ptr: regulator->rdev); |
546 | } |
547 | |
548 | /* Only LDO 5 and 6 has got the over current interrupt */ |
549 | if (pdev->id == DA9055_ID_LDO5 || pdev->id == DA9055_ID_LDO6) { |
550 | irq = platform_get_irq_byname(pdev, "REGULATOR" ); |
551 | if (irq < 0) |
552 | return irq; |
553 | |
554 | ret = devm_request_threaded_irq(dev: &pdev->dev, irq, NULL, |
555 | thread_fn: da9055_ldo5_6_oc_irq, |
556 | IRQF_TRIGGER_HIGH | |
557 | IRQF_ONESHOT | |
558 | IRQF_PROBE_SHARED, |
559 | devname: pdev->name, dev_id: regulator); |
560 | if (ret != 0) { |
561 | if (ret != -EBUSY) { |
562 | dev_err(&pdev->dev, |
563 | "Failed to request Regulator IRQ %d: %d\n" , |
564 | irq, ret); |
565 | return ret; |
566 | } |
567 | } |
568 | } |
569 | |
570 | platform_set_drvdata(pdev, data: regulator); |
571 | |
572 | return 0; |
573 | } |
574 | |
575 | static struct platform_driver da9055_regulator_driver = { |
576 | .probe = da9055_regulator_probe, |
577 | .driver = { |
578 | .name = "da9055-regulator" , |
579 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
580 | }, |
581 | }; |
582 | |
583 | static int __init da9055_regulator_init(void) |
584 | { |
585 | return platform_driver_register(&da9055_regulator_driver); |
586 | } |
587 | subsys_initcall(da9055_regulator_init); |
588 | |
589 | static void __exit da9055_regulator_exit(void) |
590 | { |
591 | platform_driver_unregister(&da9055_regulator_driver); |
592 | } |
593 | module_exit(da9055_regulator_exit); |
594 | |
595 | MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>" ); |
596 | MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9055 PMIC" ); |
597 | MODULE_LICENSE("GPL" ); |
598 | MODULE_ALIAS("platform:da9055-regulator" ); |
599 | |