Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/drivers/regulator/da9055-regulator.c

  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 #include <linux/of.h>
 23 #include <linux/regulator/of_regulator.h>
 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;
 62         int v_mask;
 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;
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);
199         }
200 
201         return -EINVAL;
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);
232         return sel;
233 }
234 
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 */
254                 return da9055_reg_update(regulator->da9055, info->volt.reg_a,
255                                          info->volt.v_mask, selector);
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)
271                 return da9055_reg_update(regulator->da9055, info->volt.reg_a,
272                                          info->volt.v_mask, selector);
273         else
274                 return da9055_reg_update(regulator->da9055, info->volt.reg_b,
275                                          info->volt.v_mask, selector);
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 
293         ret = regulator_map_voltage_linear(rdev, uV, uV);
294         if (ret < 0)
295                 return ret;
296 
297         return da9055_reg_update(regulator->da9055, info->volt.reg_b,
298                                  info->volt.v_mask, ret);
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,
336         .list_voltage = regulator_list_voltage_linear,
337         .map_voltage = regulator_map_voltage_linear,
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,
354         .list_voltage = regulator_list_voltage_linear,
355         .map_voltage = regulator_map_voltage_linear,
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,\
374                 .n_voltages = (max - min) / step + 1 + (voffset), \
375                 .enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
376                 .enable_mask = 1, \
377                 .min_uV = (min) * 1000,\
378                 .uV_step = (step) * 1000,\
379                 .linear_min_sel = (voffset),\
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,\
391                 .v_mask = (1 << (vbits)) - 1,\
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,\
402                 .n_voltages = (max - min) / step + 1 + (voffset), \
403                 .enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
404                 .enable_mask = 1,\
405                 .min_uV = (min) * 1000,\
406                 .uV_step = (step) * 1000,\
407                 .linear_min_sel = (voffset),\
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,\
419                 .v_mask = (1 << (vbits)) - 1,\
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  */
444 static int da9055_gpio_init(struct da9055_regulator *regulator,
445                             struct regulator_config *config,
446                             struct da9055_pdata *pdata, int id)
447 {
448         struct da9055_regulator_info *info = regulator->info;
449         int ret = 0;
450 
451         if (!pdata)
452                 return 0;
453 
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 
484         if (pdata->gpio_rsel && pdata->gpio_rsel[id]) {
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 
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 
562         np = of_get_child_by_name(nproot, "regulators");
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);
570                 return ret;
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
582 static inline int da9055_regulator_dt_init(struct platform_device *pdev,
583                                        struct da9055_regulator *regulator,
584                                        struct regulator_config *config,
585                                        int regid)
586 {
587         return -ENODEV;
588 }
589 #endif /* CONFIG_OF */
590 
591 static int da9055_regulator_probe(struct platform_device *pdev)
592 {
593         struct regulator_config config = { };
594         struct da9055_regulator *regulator;
595         struct da9055 *da9055 = dev_get_drvdata(pdev->dev.parent);
596         struct da9055_pdata *pdata = dev_get_platdata(da9055->dev);
597         int ret, irq;
598 
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 
615         if (pdata && pdata->regulators) {
616                 config.init_data = pdata->regulators[pdev->id];
617         } else {
618                 ret = da9055_regulator_dt_init(pdev, regulator, &config,
619                                                pdev->id);
620                 if (ret < 0)
621                         return ret;
622         }
623 
624         ret = da9055_gpio_init(regulator, &config, pdata, pdev->id);
625         if (ret < 0)
626                 return ret;
627 
628         regulator->rdev = devm_regulator_register(&pdev->dev,
629                                                   &regulator->info->reg_desc,
630                                                   &config);
631         if (IS_ERR(regulator->rdev)) {
632                 dev_err(&pdev->dev, "Failed to register regulator %s\n",
633                         regulator->info->reg_desc.name);
634                 return PTR_ERR(regulator->rdev);
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");
640                 if (irq < 0)
641                         return irq;
642 
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);
654                                 return ret;
655                         }
656                 }
657         }
658 
659         platform_set_drvdata(pdev, regulator);
660 
661         return 0;
662 }
663 
664 static struct platform_driver da9055_regulator_driver = {
665         .probe = da9055_regulator_probe,
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");
688 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us