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/consumer.h> |
13 | #include <linux/platform_device.h> |
14 | #include <linux/regulator/driver.h> |
15 | #include <linux/regulator/machine.h> |
16 | #include <linux/of.h> |
17 | #include <linux/regulator/of_regulator.h> |
18 | |
19 | #include <linux/mfd/da9055/core.h> |
20 | #include <linux/mfd/da9055/reg.h> |
21 | #include <linux/mfd/da9055/pdata.h> |
22 | |
23 | #define DA9055_MIN_UA 0 |
24 | #define DA9055_MAX_UA 3 |
25 | |
26 | #define DA9055_LDO_MODE_SYNC 0 |
27 | #define DA9055_LDO_MODE_SLEEP 1 |
28 | |
29 | #define DA9055_BUCK_MODE_SLEEP 1 |
30 | #define DA9055_BUCK_MODE_SYNC 2 |
31 | #define DA9055_BUCK_MODE_AUTO 3 |
32 | |
33 | /* DA9055 REGULATOR IDs */ |
34 | #define DA9055_ID_BUCK1 0 |
35 | #define DA9055_ID_BUCK2 1 |
36 | #define DA9055_ID_LDO1 2 |
37 | #define DA9055_ID_LDO2 3 |
38 | #define DA9055_ID_LDO3 4 |
39 | #define DA9055_ID_LDO4 5 |
40 | #define DA9055_ID_LDO5 6 |
41 | #define DA9055_ID_LDO6 7 |
42 | |
43 | /* DA9055 BUCK current limit */ |
44 | static const unsigned int da9055_current_limits[] = { |
45 | 500000, 600000, 700000, 800000 |
46 | }; |
47 | |
48 | struct da9055_conf_reg { |
49 | int reg; |
50 | int sel_mask; |
51 | int en_mask; |
52 | }; |
53 | |
54 | struct da9055_volt_reg { |
55 | int reg_a; |
56 | int reg_b; |
57 | int sl_shift; |
58 | int v_mask; |
59 | }; |
60 | |
61 | struct da9055_mode_reg { |
62 | int reg; |
63 | int mask; |
64 | int shift; |
65 | }; |
66 | |
67 | struct da9055_regulator_info { |
68 | struct regulator_desc reg_desc; |
69 | struct da9055_conf_reg conf; |
70 | struct da9055_volt_reg volt; |
71 | struct da9055_mode_reg mode; |
72 | }; |
73 | |
74 | struct da9055_regulator { |
75 | struct da9055 *da9055; |
76 | struct da9055_regulator_info *info; |
77 | struct regulator_dev *rdev; |
78 | enum gpio_select reg_rselect; |
79 | }; |
80 | |
81 | static unsigned int da9055_buck_get_mode(struct regulator_dev *rdev) |
82 | { |
83 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
84 | struct da9055_regulator_info *info = regulator->info; |
85 | int ret, mode = 0; |
86 | |
87 | ret = da9055_reg_read(da9055: regulator->da9055, reg: info->mode.reg); |
88 | if (ret < 0) |
89 | return ret; |
90 | |
91 | switch ((ret & info->mode.mask) >> info->mode.shift) { |
92 | case DA9055_BUCK_MODE_SYNC: |
93 | mode = REGULATOR_MODE_FAST; |
94 | break; |
95 | case DA9055_BUCK_MODE_AUTO: |
96 | mode = REGULATOR_MODE_NORMAL; |
97 | break; |
98 | case DA9055_BUCK_MODE_SLEEP: |
99 | mode = REGULATOR_MODE_STANDBY; |
100 | break; |
101 | } |
102 | |
103 | return mode; |
104 | } |
105 | |
106 | static int da9055_buck_set_mode(struct regulator_dev *rdev, |
107 | unsigned int mode) |
108 | { |
109 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
110 | struct da9055_regulator_info *info = regulator->info; |
111 | int val = 0; |
112 | |
113 | switch (mode) { |
114 | case REGULATOR_MODE_FAST: |
115 | val = DA9055_BUCK_MODE_SYNC << info->mode.shift; |
116 | break; |
117 | case REGULATOR_MODE_NORMAL: |
118 | val = DA9055_BUCK_MODE_AUTO << info->mode.shift; |
119 | break; |
120 | case REGULATOR_MODE_STANDBY: |
121 | val = DA9055_BUCK_MODE_SLEEP << info->mode.shift; |
122 | break; |
123 | } |
124 | |
125 | return da9055_reg_update(da9055: regulator->da9055, reg: info->mode.reg, |
126 | bit_mask: info->mode.mask, reg_val: val); |
127 | } |
128 | |
129 | static unsigned int da9055_ldo_get_mode(struct regulator_dev *rdev) |
130 | { |
131 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
132 | struct da9055_regulator_info *info = regulator->info; |
133 | int ret; |
134 | |
135 | ret = da9055_reg_read(da9055: regulator->da9055, reg: info->volt.reg_b); |
136 | if (ret < 0) |
137 | return ret; |
138 | |
139 | if (ret >> info->volt.sl_shift) |
140 | return REGULATOR_MODE_STANDBY; |
141 | else |
142 | return REGULATOR_MODE_NORMAL; |
143 | } |
144 | |
145 | static int da9055_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode) |
146 | { |
147 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
148 | struct da9055_regulator_info *info = regulator->info; |
149 | struct da9055_volt_reg volt = info->volt; |
150 | int val = 0; |
151 | |
152 | switch (mode) { |
153 | case REGULATOR_MODE_NORMAL: |
154 | case REGULATOR_MODE_FAST: |
155 | val = DA9055_LDO_MODE_SYNC; |
156 | break; |
157 | case REGULATOR_MODE_STANDBY: |
158 | val = DA9055_LDO_MODE_SLEEP; |
159 | break; |
160 | } |
161 | |
162 | return da9055_reg_update(da9055: regulator->da9055, reg: volt.reg_b, |
163 | bit_mask: 1 << volt.sl_shift, |
164 | reg_val: val << volt.sl_shift); |
165 | } |
166 | |
167 | static int da9055_regulator_get_voltage_sel(struct regulator_dev *rdev) |
168 | { |
169 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
170 | struct da9055_regulator_info *info = regulator->info; |
171 | struct da9055_volt_reg volt = info->volt; |
172 | int ret, sel; |
173 | |
174 | /* |
175 | * There are two voltage register set A & B for voltage ramping but |
176 | * either one of then can be active therefore we first determine |
177 | * the active register set. |
178 | */ |
179 | ret = da9055_reg_read(da9055: regulator->da9055, reg: info->conf.reg); |
180 | if (ret < 0) |
181 | return ret; |
182 | |
183 | ret &= info->conf.sel_mask; |
184 | |
185 | /* Get the voltage for the active register set A/B */ |
186 | if (ret == DA9055_REGUALTOR_SET_A) |
187 | ret = da9055_reg_read(da9055: regulator->da9055, reg: volt.reg_a); |
188 | else |
189 | ret = da9055_reg_read(da9055: regulator->da9055, reg: volt.reg_b); |
190 | |
191 | if (ret < 0) |
192 | return ret; |
193 | |
194 | sel = (ret & volt.v_mask); |
195 | return sel; |
196 | } |
197 | |
198 | static int da9055_regulator_set_voltage_sel(struct regulator_dev *rdev, |
199 | unsigned int selector) |
200 | { |
201 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
202 | struct da9055_regulator_info *info = regulator->info; |
203 | int ret; |
204 | |
205 | /* |
206 | * Regulator register set A/B is not selected through GPIO therefore |
207 | * we use default register set A for voltage ramping. |
208 | */ |
209 | if (regulator->reg_rselect == NO_GPIO) { |
210 | /* Select register set A */ |
211 | ret = da9055_reg_update(da9055: regulator->da9055, reg: info->conf.reg, |
212 | bit_mask: info->conf.sel_mask, DA9055_SEL_REG_A); |
213 | if (ret < 0) |
214 | return ret; |
215 | |
216 | /* Set the voltage */ |
217 | return da9055_reg_update(da9055: regulator->da9055, reg: info->volt.reg_a, |
218 | bit_mask: info->volt.v_mask, reg_val: selector); |
219 | } |
220 | |
221 | /* |
222 | * Here regulator register set A/B is selected through GPIO. |
223 | * Therefore we first determine the selected register set A/B and |
224 | * then set the desired voltage for that register set A/B. |
225 | */ |
226 | ret = da9055_reg_read(da9055: regulator->da9055, reg: info->conf.reg); |
227 | if (ret < 0) |
228 | return ret; |
229 | |
230 | ret &= info->conf.sel_mask; |
231 | |
232 | /* Set the voltage */ |
233 | if (ret == DA9055_REGUALTOR_SET_A) |
234 | return da9055_reg_update(da9055: regulator->da9055, reg: info->volt.reg_a, |
235 | bit_mask: info->volt.v_mask, reg_val: selector); |
236 | else |
237 | return da9055_reg_update(da9055: regulator->da9055, reg: info->volt.reg_b, |
238 | bit_mask: info->volt.v_mask, reg_val: selector); |
239 | } |
240 | |
241 | static int da9055_regulator_set_suspend_voltage(struct regulator_dev *rdev, |
242 | int uV) |
243 | { |
244 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
245 | struct da9055_regulator_info *info = regulator->info; |
246 | int ret; |
247 | |
248 | /* Select register set B for suspend voltage ramping. */ |
249 | if (regulator->reg_rselect == NO_GPIO) { |
250 | ret = da9055_reg_update(da9055: regulator->da9055, reg: info->conf.reg, |
251 | bit_mask: info->conf.sel_mask, DA9055_SEL_REG_B); |
252 | if (ret < 0) |
253 | return ret; |
254 | } |
255 | |
256 | ret = regulator_map_voltage_linear(rdev, min_uV: uV, max_uV: uV); |
257 | if (ret < 0) |
258 | return ret; |
259 | |
260 | return da9055_reg_update(da9055: regulator->da9055, reg: info->volt.reg_b, |
261 | bit_mask: info->volt.v_mask, reg_val: ret); |
262 | } |
263 | |
264 | static int da9055_suspend_enable(struct regulator_dev *rdev) |
265 | { |
266 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
267 | struct da9055_regulator_info *info = regulator->info; |
268 | |
269 | /* Select register set B for voltage ramping. */ |
270 | if (regulator->reg_rselect == NO_GPIO) |
271 | return da9055_reg_update(da9055: regulator->da9055, reg: info->conf.reg, |
272 | bit_mask: info->conf.sel_mask, DA9055_SEL_REG_B); |
273 | else |
274 | return 0; |
275 | } |
276 | |
277 | static int da9055_suspend_disable(struct regulator_dev *rdev) |
278 | { |
279 | struct da9055_regulator *regulator = rdev_get_drvdata(rdev); |
280 | struct da9055_regulator_info *info = regulator->info; |
281 | |
282 | /* Diselect register set B. */ |
283 | if (regulator->reg_rselect == NO_GPIO) |
284 | return da9055_reg_update(da9055: regulator->da9055, reg: info->conf.reg, |
285 | bit_mask: info->conf.sel_mask, DA9055_SEL_REG_A); |
286 | else |
287 | return 0; |
288 | } |
289 | |
290 | static const struct regulator_ops da9055_buck_ops = { |
291 | .get_mode = da9055_buck_get_mode, |
292 | .set_mode = da9055_buck_set_mode, |
293 | |
294 | .get_current_limit = regulator_get_current_limit_regmap, |
295 | .set_current_limit = regulator_set_current_limit_regmap, |
296 | |
297 | .get_voltage_sel = da9055_regulator_get_voltage_sel, |
298 | .set_voltage_sel = da9055_regulator_set_voltage_sel, |
299 | .list_voltage = regulator_list_voltage_linear, |
300 | .map_voltage = regulator_map_voltage_linear, |
301 | .is_enabled = regulator_is_enabled_regmap, |
302 | .enable = regulator_enable_regmap, |
303 | .disable = regulator_disable_regmap, |
304 | |
305 | .set_suspend_voltage = da9055_regulator_set_suspend_voltage, |
306 | .set_suspend_enable = da9055_suspend_enable, |
307 | .set_suspend_disable = da9055_suspend_disable, |
308 | .set_suspend_mode = da9055_buck_set_mode, |
309 | }; |
310 | |
311 | static const struct regulator_ops da9055_ldo_ops = { |
312 | .get_mode = da9055_ldo_get_mode, |
313 | .set_mode = da9055_ldo_set_mode, |
314 | |
315 | .get_voltage_sel = da9055_regulator_get_voltage_sel, |
316 | .set_voltage_sel = da9055_regulator_set_voltage_sel, |
317 | .list_voltage = regulator_list_voltage_linear, |
318 | .map_voltage = regulator_map_voltage_linear, |
319 | .is_enabled = regulator_is_enabled_regmap, |
320 | .enable = regulator_enable_regmap, |
321 | .disable = regulator_disable_regmap, |
322 | |
323 | .set_suspend_voltage = da9055_regulator_set_suspend_voltage, |
324 | .set_suspend_enable = da9055_suspend_enable, |
325 | .set_suspend_disable = da9055_suspend_disable, |
326 | .set_suspend_mode = da9055_ldo_set_mode, |
327 | |
328 | }; |
329 | |
330 | #define DA9055_LDO(_id, step, min, max, vbits, voffset) \ |
331 | {\ |
332 | .reg_desc = {\ |
333 | .name = #_id,\ |
334 | .of_match = of_match_ptr(#_id),\ |
335 | .regulators_node = of_match_ptr("regulators"),\ |
336 | .ops = &da9055_ldo_ops,\ |
337 | .type = REGULATOR_VOLTAGE,\ |
338 | .id = DA9055_ID_##_id,\ |
339 | .n_voltages = (max - min) / step + 1 + (voffset), \ |
340 | .enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ |
341 | .enable_mask = 1, \ |
342 | .min_uV = (min) * 1000,\ |
343 | .uV_step = (step) * 1000,\ |
344 | .linear_min_sel = (voffset),\ |
345 | .owner = THIS_MODULE,\ |
346 | },\ |
347 | .conf = {\ |
348 | .reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ |
349 | .sel_mask = (1 << 4),\ |
350 | .en_mask = 1,\ |
351 | },\ |
352 | .volt = {\ |
353 | .reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \ |
354 | .reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \ |
355 | .sl_shift = 7,\ |
356 | .v_mask = (1 << (vbits)) - 1,\ |
357 | },\ |
358 | } |
359 | |
360 | #define DA9055_BUCK(_id, step, min, max, vbits, voffset, mbits, sbits) \ |
361 | {\ |
362 | .reg_desc = {\ |
363 | .name = #_id,\ |
364 | .of_match = of_match_ptr(#_id),\ |
365 | .regulators_node = of_match_ptr("regulators"),\ |
366 | .ops = &da9055_buck_ops,\ |
367 | .type = REGULATOR_VOLTAGE,\ |
368 | .id = DA9055_ID_##_id,\ |
369 | .n_voltages = (max - min) / step + 1 + (voffset), \ |
370 | .enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ |
371 | .enable_mask = 1,\ |
372 | .min_uV = (min) * 1000,\ |
373 | .uV_step = (step) * 1000,\ |
374 | .linear_min_sel = (voffset),\ |
375 | .owner = THIS_MODULE,\ |
376 | .curr_table = da9055_current_limits,\ |
377 | .n_current_limits = ARRAY_SIZE(da9055_current_limits),\ |
378 | .csel_reg = DA9055_REG_BUCK_LIM,\ |
379 | .csel_mask = (mbits),\ |
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,\ |
390 | .v_mask = (1 << (vbits)) - 1,\ |
391 | },\ |
392 | .mode = {\ |
393 | .reg = DA9055_REG_BCORE_MODE,\ |
394 | .mask = (mbits),\ |
395 | .shift = (sbits),\ |
396 | },\ |
397 | } |
398 | |
399 | static struct da9055_regulator_info da9055_regulator_info[] = { |
400 | DA9055_BUCK(BUCK1, 25, 725, 2075, 6, 9, 0xc, 2), |
401 | DA9055_BUCK(BUCK2, 25, 925, 2500, 6, 0, 3, 0), |
402 | DA9055_LDO(LDO1, 50, 900, 3300, 6, 2), |
403 | DA9055_LDO(LDO2, 50, 900, 3300, 6, 3), |
404 | DA9055_LDO(LDO3, 50, 900, 3300, 6, 2), |
405 | DA9055_LDO(LDO4, 50, 900, 3300, 6, 2), |
406 | DA9055_LDO(LDO5, 50, 900, 2750, 6, 2), |
407 | DA9055_LDO(LDO6, 20, 900, 3300, 7, 0), |
408 | }; |
409 | |
410 | /* |
411 | * Configures regulator to be controlled either through GPIO 1 or 2. |
412 | * GPIO can control regulator state and/or select the regulator register |
413 | * set A/B for voltage ramping. |
414 | */ |
415 | static int da9055_gpio_init(struct device *dev, |
416 | 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 | struct gpio_desc *ren; |
422 | struct gpio_desc *ena; |
423 | struct gpio_desc *rsel; |
424 | int ret = 0; |
425 | |
426 | /* Look for "regulator-enable-gpios" GPIOs in the regulator node */ |
427 | ren = devm_gpiod_get_optional(dev, con_id: "regulator-enable" , flags: GPIOD_IN); |
428 | if (IS_ERR(ptr: ren)) |
429 | return PTR_ERR(ptr: ren); |
430 | |
431 | if (ren) { |
432 | /* This GPIO is not optional at this point */ |
433 | ena = devm_gpiod_get(dev, con_id: "enable" , flags: GPIOD_OUT_HIGH); |
434 | if (IS_ERR(ptr: ena)) |
435 | return PTR_ERR(ptr: ena); |
436 | |
437 | config->ena_gpiod = ena; |
438 | |
439 | /* |
440 | * GPI pin is muxed with regulator to control the |
441 | * regulator state. |
442 | */ |
443 | gpiod_set_consumer_name(desc: ren, name: "DA9055 ren GPI" ); |
444 | |
445 | /* |
446 | * Let the regulator know that its state is controlled |
447 | * through GPI. |
448 | */ |
449 | ret = da9055_reg_update(da9055: regulator->da9055, reg: info->conf.reg, |
450 | DA9055_E_GPI_MASK, |
451 | reg_val: pdata->reg_ren[id] |
452 | << DA9055_E_GPI_SHIFT); |
453 | if (ret < 0) |
454 | return ret; |
455 | } |
456 | |
457 | /* Look for "regulator-select-gpios" GPIOs in the regulator node */ |
458 | rsel = devm_gpiod_get_optional(dev, con_id: "regulator-select" , flags: GPIOD_IN); |
459 | if (IS_ERR(ptr: rsel)) |
460 | return PTR_ERR(ptr: rsel); |
461 | |
462 | if (rsel) { |
463 | regulator->reg_rselect = pdata->reg_rsel[id]; |
464 | |
465 | /* |
466 | * GPI pin is muxed with regulator to select the |
467 | * regulator register set A/B for voltage ramping. |
468 | */ |
469 | gpiod_set_consumer_name(desc: rsel, name: "DA9055 rsel GPI" ); |
470 | |
471 | /* |
472 | * Let the regulator know that its register set A/B |
473 | * will be selected through GPI for voltage ramping. |
474 | */ |
475 | ret = da9055_reg_update(da9055: regulator->da9055, reg: info->conf.reg, |
476 | DA9055_V_GPI_MASK, |
477 | reg_val: pdata->reg_rsel[id] |
478 | << DA9055_V_GPI_SHIFT); |
479 | } |
480 | |
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(dev: &pdev->dev, 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 | |