Version:  2.0.40 2.2.26 2.4.37 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 3.16 3.17

Linux/drivers/regulator/s5m8767.c

  1 /*
  2  * s5m8767.c
  3  *
  4  * Copyright (c) 2011 Samsung Electronics Co., Ltd
  5  *              http://www.samsung.com
  6  *
  7  *  This program is free software; you can redistribute  it and/or modify it
  8  *  under  the terms of  the GNU General  Public License as published by the
  9  *  Free Software Foundation;  either version 2 of the  License, or (at your
 10  *  option) any later version.
 11  *
 12  */
 13 
 14 #include <linux/err.h>
 15 #include <linux/of_gpio.h>
 16 #include <linux/module.h>
 17 #include <linux/platform_device.h>
 18 #include <linux/regulator/driver.h>
 19 #include <linux/regulator/machine.h>
 20 #include <linux/mfd/samsung/core.h>
 21 #include <linux/mfd/samsung/s5m8767.h>
 22 #include <linux/regulator/of_regulator.h>
 23 #include <linux/regmap.h>
 24 
 25 #define S5M8767_OPMODE_NORMAL_MODE 0x1
 26 
 27 struct s5m8767_info {
 28         struct device *dev;
 29         struct sec_pmic_dev *iodev;
 30         int num_regulators;
 31         struct sec_opmode_data *opmode;
 32 
 33         int ramp_delay;
 34         bool buck2_ramp;
 35         bool buck3_ramp;
 36         bool buck4_ramp;
 37 
 38         bool buck2_gpiodvs;
 39         bool buck3_gpiodvs;
 40         bool buck4_gpiodvs;
 41         u8 buck2_vol[8];
 42         u8 buck3_vol[8];
 43         u8 buck4_vol[8];
 44         int buck_gpios[3];
 45         int buck_ds[3];
 46         int buck_gpioindex;
 47 };
 48 
 49 struct sec_voltage_desc {
 50         int max;
 51         int min;
 52         int step;
 53 };
 54 
 55 static const struct sec_voltage_desc buck_voltage_val1 = {
 56         .max = 2225000,
 57         .min =  650000,
 58         .step =   6250,
 59 };
 60 
 61 static const struct sec_voltage_desc buck_voltage_val2 = {
 62         .max = 1600000,
 63         .min =  600000,
 64         .step =   6250,
 65 };
 66 
 67 static const struct sec_voltage_desc buck_voltage_val3 = {
 68         .max = 3000000,
 69         .min =  750000,
 70         .step =  12500,
 71 };
 72 
 73 static const struct sec_voltage_desc ldo_voltage_val1 = {
 74         .max = 3950000,
 75         .min =  800000,
 76         .step =  50000,
 77 };
 78 
 79 static const struct sec_voltage_desc ldo_voltage_val2 = {
 80         .max = 2375000,
 81         .min =  800000,
 82         .step =  25000,
 83 };
 84 
 85 static const struct sec_voltage_desc *reg_voltage_map[] = {
 86         [S5M8767_LDO1] = &ldo_voltage_val2,
 87         [S5M8767_LDO2] = &ldo_voltage_val2,
 88         [S5M8767_LDO3] = &ldo_voltage_val1,
 89         [S5M8767_LDO4] = &ldo_voltage_val1,
 90         [S5M8767_LDO5] = &ldo_voltage_val1,
 91         [S5M8767_LDO6] = &ldo_voltage_val2,
 92         [S5M8767_LDO7] = &ldo_voltage_val2,
 93         [S5M8767_LDO8] = &ldo_voltage_val2,
 94         [S5M8767_LDO9] = &ldo_voltage_val1,
 95         [S5M8767_LDO10] = &ldo_voltage_val1,
 96         [S5M8767_LDO11] = &ldo_voltage_val1,
 97         [S5M8767_LDO12] = &ldo_voltage_val1,
 98         [S5M8767_LDO13] = &ldo_voltage_val1,
 99         [S5M8767_LDO14] = &ldo_voltage_val1,
100         [S5M8767_LDO15] = &ldo_voltage_val2,
101         [S5M8767_LDO16] = &ldo_voltage_val1,
102         [S5M8767_LDO17] = &ldo_voltage_val1,
103         [S5M8767_LDO18] = &ldo_voltage_val1,
104         [S5M8767_LDO19] = &ldo_voltage_val1,
105         [S5M8767_LDO20] = &ldo_voltage_val1,
106         [S5M8767_LDO21] = &ldo_voltage_val1,
107         [S5M8767_LDO22] = &ldo_voltage_val1,
108         [S5M8767_LDO23] = &ldo_voltage_val1,
109         [S5M8767_LDO24] = &ldo_voltage_val1,
110         [S5M8767_LDO25] = &ldo_voltage_val1,
111         [S5M8767_LDO26] = &ldo_voltage_val1,
112         [S5M8767_LDO27] = &ldo_voltage_val1,
113         [S5M8767_LDO28] = &ldo_voltage_val1,
114         [S5M8767_BUCK1] = &buck_voltage_val1,
115         [S5M8767_BUCK2] = &buck_voltage_val2,
116         [S5M8767_BUCK3] = &buck_voltage_val2,
117         [S5M8767_BUCK4] = &buck_voltage_val2,
118         [S5M8767_BUCK5] = &buck_voltage_val1,
119         [S5M8767_BUCK6] = &buck_voltage_val1,
120         [S5M8767_BUCK7] = &buck_voltage_val3,
121         [S5M8767_BUCK8] = &buck_voltage_val3,
122         [S5M8767_BUCK9] = &buck_voltage_val3,
123 };
124 
125 static unsigned int s5m8767_opmode_reg[][4] = {
126         /* {OFF, ON, LOWPOWER, SUSPEND} */
127         /* LDO1 ... LDO28 */
128         {0x0, 0x3, 0x2, 0x1}, /* LDO1 */
129         {0x0, 0x3, 0x2, 0x1},
130         {0x0, 0x3, 0x2, 0x1},
131         {0x0, 0x0, 0x0, 0x0},
132         {0x0, 0x3, 0x2, 0x1}, /* LDO5 */
133         {0x0, 0x3, 0x2, 0x1},
134         {0x0, 0x3, 0x2, 0x1},
135         {0x0, 0x3, 0x2, 0x1},
136         {0x0, 0x3, 0x2, 0x1},
137         {0x0, 0x3, 0x2, 0x1}, /* LDO10 */
138         {0x0, 0x3, 0x2, 0x1},
139         {0x0, 0x3, 0x2, 0x1},
140         {0x0, 0x3, 0x2, 0x1},
141         {0x0, 0x3, 0x2, 0x1},
142         {0x0, 0x3, 0x2, 0x1}, /* LDO15 */
143         {0x0, 0x3, 0x2, 0x1},
144         {0x0, 0x3, 0x2, 0x1},
145         {0x0, 0x0, 0x0, 0x0},
146         {0x0, 0x3, 0x2, 0x1},
147         {0x0, 0x3, 0x2, 0x1}, /* LDO20 */
148         {0x0, 0x3, 0x2, 0x1},
149         {0x0, 0x3, 0x2, 0x1},
150         {0x0, 0x0, 0x0, 0x0},
151         {0x0, 0x3, 0x2, 0x1},
152         {0x0, 0x3, 0x2, 0x1}, /* LDO25 */
153         {0x0, 0x3, 0x2, 0x1},
154         {0x0, 0x3, 0x2, 0x1},
155         {0x0, 0x3, 0x2, 0x1}, /* LDO28 */
156 
157         /* BUCK1 ... BUCK9 */
158         {0x0, 0x3, 0x1, 0x1}, /* BUCK1 */
159         {0x0, 0x3, 0x1, 0x1},
160         {0x0, 0x3, 0x1, 0x1},
161         {0x0, 0x3, 0x1, 0x1},
162         {0x0, 0x3, 0x2, 0x1}, /* BUCK5 */
163         {0x0, 0x3, 0x1, 0x1},
164         {0x0, 0x3, 0x1, 0x1},
165         {0x0, 0x3, 0x1, 0x1},
166         {0x0, 0x3, 0x1, 0x1}, /* BUCK9 */
167 };
168 
169 static int s5m8767_get_register(struct s5m8767_info *s5m8767, int reg_id,
170                                 int *reg, int *enable_ctrl)
171 {
172         int i;
173         unsigned int mode;
174 
175         switch (reg_id) {
176         case S5M8767_LDO1 ... S5M8767_LDO2:
177                 *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
178                 break;
179         case S5M8767_LDO3 ... S5M8767_LDO28:
180                 *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
181                 break;
182         case S5M8767_BUCK1:
183                 *reg = S5M8767_REG_BUCK1CTRL1;
184                 break;
185         case S5M8767_BUCK2 ... S5M8767_BUCK4:
186                 *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9;
187                 break;
188         case S5M8767_BUCK5:
189                 *reg = S5M8767_REG_BUCK5CTRL1;
190                 break;
191         case S5M8767_BUCK6 ... S5M8767_BUCK9:
192                 *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2;
193                 break;
194         default:
195                 return -EINVAL;
196         }
197 
198         for (i = 0; i < s5m8767->num_regulators; i++) {
199                 if (s5m8767->opmode[i].id == reg_id) {
200                         mode = s5m8767->opmode[i].mode;
201                         break;
202                 }
203         }
204 
205         if (i < s5m8767->num_regulators)
206                 *enable_ctrl =
207                 s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT;
208 
209         return 0;
210 }
211 
212 static int s5m8767_get_vsel_reg(int reg_id, struct s5m8767_info *s5m8767)
213 {
214         int reg;
215 
216         switch (reg_id) {
217         case S5M8767_LDO1 ... S5M8767_LDO2:
218                 reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
219                 break;
220         case S5M8767_LDO3 ... S5M8767_LDO28:
221                 reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
222                 break;
223         case S5M8767_BUCK1:
224                 reg = S5M8767_REG_BUCK1CTRL2;
225                 break;
226         case S5M8767_BUCK2:
227                 reg = S5M8767_REG_BUCK2DVS1;
228                 if (s5m8767->buck2_gpiodvs)
229                         reg += s5m8767->buck_gpioindex;
230                 break;
231         case S5M8767_BUCK3:
232                 reg = S5M8767_REG_BUCK3DVS1;
233                 if (s5m8767->buck3_gpiodvs)
234                         reg += s5m8767->buck_gpioindex;
235                 break;
236         case S5M8767_BUCK4:
237                 reg = S5M8767_REG_BUCK4DVS1;
238                 if (s5m8767->buck4_gpiodvs)
239                         reg += s5m8767->buck_gpioindex;
240                 break;
241         case S5M8767_BUCK5:
242                 reg = S5M8767_REG_BUCK5CTRL2;
243                 break;
244         case S5M8767_BUCK6 ... S5M8767_BUCK9:
245                 reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
246                 break;
247         default:
248                 return -EINVAL;
249         }
250 
251         return reg;
252 }
253 
254 static int s5m8767_convert_voltage_to_sel(const struct sec_voltage_desc *desc,
255                                           int min_vol)
256 {
257         int selector = 0;
258 
259         if (desc == NULL)
260                 return -EINVAL;
261 
262         if (min_vol > desc->max)
263                 return -EINVAL;
264 
265         if (min_vol < desc->min)
266                 min_vol = desc->min;
267 
268         selector = DIV_ROUND_UP(min_vol - desc->min, desc->step);
269 
270         if (desc->min + desc->step * selector > desc->max)
271                 return -EINVAL;
272 
273         return selector;
274 }
275 
276 static inline int s5m8767_set_high(struct s5m8767_info *s5m8767)
277 {
278         int temp_index = s5m8767->buck_gpioindex;
279 
280         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
281         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
282         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
283 
284         return 0;
285 }
286 
287 static inline int s5m8767_set_low(struct s5m8767_info *s5m8767)
288 {
289         int temp_index = s5m8767->buck_gpioindex;
290 
291         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
292         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
293         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
294 
295         return 0;
296 }
297 
298 static int s5m8767_set_voltage_sel(struct regulator_dev *rdev,
299                                    unsigned selector)
300 {
301         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
302         int reg_id = rdev_get_id(rdev);
303         int old_index, index = 0;
304         u8 *buck234_vol = NULL;
305 
306         switch (reg_id) {
307         case S5M8767_LDO1 ... S5M8767_LDO28:
308                 break;
309         case S5M8767_BUCK1 ... S5M8767_BUCK6:
310                 if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs)
311                         buck234_vol = &s5m8767->buck2_vol[0];
312                 else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs)
313                         buck234_vol = &s5m8767->buck3_vol[0];
314                 else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs)
315                         buck234_vol = &s5m8767->buck4_vol[0];
316                 break;
317         case S5M8767_BUCK7 ... S5M8767_BUCK8:
318                 return -EINVAL;
319         case S5M8767_BUCK9:
320                 break;
321         default:
322                 return -EINVAL;
323         }
324 
325         /* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */
326         if (buck234_vol) {
327                 while (*buck234_vol != selector) {
328                         buck234_vol++;
329                         index++;
330                 }
331                 old_index = s5m8767->buck_gpioindex;
332                 s5m8767->buck_gpioindex = index;
333 
334                 if (index > old_index)
335                         return s5m8767_set_high(s5m8767);
336                 else
337                         return s5m8767_set_low(s5m8767);
338         } else {
339                 return regulator_set_voltage_sel_regmap(rdev, selector);
340         }
341 }
342 
343 static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
344                                              unsigned int old_sel,
345                                              unsigned int new_sel)
346 {
347         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
348         const struct sec_voltage_desc *desc;
349         int reg_id = rdev_get_id(rdev);
350 
351         desc = reg_voltage_map[reg_id];
352 
353         if ((old_sel < new_sel) && s5m8767->ramp_delay)
354                 return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
355                                         s5m8767->ramp_delay * 1000);
356         return 0;
357 }
358 
359 static struct regulator_ops s5m8767_ops = {
360         .list_voltage           = regulator_list_voltage_linear,
361         .is_enabled             = regulator_is_enabled_regmap,
362         .enable                 = regulator_enable_regmap,
363         .disable                = regulator_disable_regmap,
364         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
365         .set_voltage_sel        = s5m8767_set_voltage_sel,
366         .set_voltage_time_sel   = s5m8767_set_voltage_time_sel,
367 };
368 
369 static struct regulator_ops s5m8767_buck78_ops = {
370         .list_voltage           = regulator_list_voltage_linear,
371         .is_enabled             = regulator_is_enabled_regmap,
372         .enable                 = regulator_enable_regmap,
373         .disable                = regulator_disable_regmap,
374         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
375         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
376 };
377 
378 #define s5m8767_regulator_desc(_name) {         \
379         .name           = #_name,               \
380         .id             = S5M8767_##_name,      \
381         .ops            = &s5m8767_ops,         \
382         .type           = REGULATOR_VOLTAGE,    \
383         .owner          = THIS_MODULE,          \
384 }
385 
386 #define s5m8767_regulator_buck78_desc(_name) {  \
387         .name           = #_name,               \
388         .id             = S5M8767_##_name,      \
389         .ops            = &s5m8767_buck78_ops,  \
390         .type           = REGULATOR_VOLTAGE,    \
391         .owner          = THIS_MODULE,          \
392 }
393 
394 static struct regulator_desc regulators[] = {
395         s5m8767_regulator_desc(LDO1),
396         s5m8767_regulator_desc(LDO2),
397         s5m8767_regulator_desc(LDO3),
398         s5m8767_regulator_desc(LDO4),
399         s5m8767_regulator_desc(LDO5),
400         s5m8767_regulator_desc(LDO6),
401         s5m8767_regulator_desc(LDO7),
402         s5m8767_regulator_desc(LDO8),
403         s5m8767_regulator_desc(LDO9),
404         s5m8767_regulator_desc(LDO10),
405         s5m8767_regulator_desc(LDO11),
406         s5m8767_regulator_desc(LDO12),
407         s5m8767_regulator_desc(LDO13),
408         s5m8767_regulator_desc(LDO14),
409         s5m8767_regulator_desc(LDO15),
410         s5m8767_regulator_desc(LDO16),
411         s5m8767_regulator_desc(LDO17),
412         s5m8767_regulator_desc(LDO18),
413         s5m8767_regulator_desc(LDO19),
414         s5m8767_regulator_desc(LDO20),
415         s5m8767_regulator_desc(LDO21),
416         s5m8767_regulator_desc(LDO22),
417         s5m8767_regulator_desc(LDO23),
418         s5m8767_regulator_desc(LDO24),
419         s5m8767_regulator_desc(LDO25),
420         s5m8767_regulator_desc(LDO26),
421         s5m8767_regulator_desc(LDO27),
422         s5m8767_regulator_desc(LDO28),
423         s5m8767_regulator_desc(BUCK1),
424         s5m8767_regulator_desc(BUCK2),
425         s5m8767_regulator_desc(BUCK3),
426         s5m8767_regulator_desc(BUCK4),
427         s5m8767_regulator_desc(BUCK5),
428         s5m8767_regulator_desc(BUCK6),
429         s5m8767_regulator_buck78_desc(BUCK7),
430         s5m8767_regulator_buck78_desc(BUCK8),
431         s5m8767_regulator_desc(BUCK9),
432 };
433 
434 /*
435  * Enable GPIO control over BUCK9 in regulator_config for that regulator.
436  */
437 static void s5m8767_regulator_config_ext_control(struct s5m8767_info *s5m8767,
438                 struct sec_regulator_data *rdata,
439                 struct regulator_config *config)
440 {
441         int i, mode = 0;
442 
443         if (rdata->id != S5M8767_BUCK9)
444                 return;
445 
446         /* Check if opmode for regulator matches S5M8767_ENCTRL_USE_GPIO */
447         for (i = 0; i < s5m8767->num_regulators; i++) {
448                 const struct sec_opmode_data *opmode = &s5m8767->opmode[i];
449                 if (opmode->id == rdata->id) {
450                         mode = s5m8767_opmode_reg[rdata->id][opmode->mode];
451                         break;
452                 }
453         }
454         if (mode != S5M8767_ENCTRL_USE_GPIO) {
455                 dev_warn(s5m8767->dev,
456                                 "ext-control for %s: mismatched op_mode (%x), ignoring\n",
457                                 rdata->reg_node->name, mode);
458                 return;
459         }
460 
461         if (!gpio_is_valid(rdata->ext_control_gpio)) {
462                 dev_warn(s5m8767->dev,
463                                 "ext-control for %s: GPIO not valid, ignoring\n",
464                                 rdata->reg_node->name);
465                 return;
466         }
467 
468         config->ena_gpio = rdata->ext_control_gpio;
469         config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
470 }
471 
472 /*
473  * Turn on GPIO control over BUCK9.
474  */
475 static int s5m8767_enable_ext_control(struct s5m8767_info *s5m8767,
476                 struct regulator_dev *rdev)
477 {
478         int id = rdev_get_id(rdev);
479         int ret, reg, enable_ctrl;
480 
481         if (id != S5M8767_BUCK9)
482                 return -EINVAL;
483 
484         ret = s5m8767_get_register(s5m8767, id, &reg, &enable_ctrl);
485         if (ret)
486                 return ret;
487 
488         return regmap_update_bits(s5m8767->iodev->regmap_pmic,
489                         reg, S5M8767_ENCTRL_MASK,
490                         S5M8767_ENCTRL_USE_GPIO << S5M8767_ENCTRL_SHIFT);
491 }
492 
493 
494 #ifdef CONFIG_OF
495 static int s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev *iodev,
496                         struct sec_platform_data *pdata,
497                         struct device_node *pmic_np)
498 {
499         int i, gpio;
500 
501         for (i = 0; i < 3; i++) {
502                 gpio = of_get_named_gpio(pmic_np,
503                                         "s5m8767,pmic-buck-dvs-gpios", i);
504                 if (!gpio_is_valid(gpio)) {
505                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
506                         return -EINVAL;
507                 }
508                 pdata->buck_gpios[i] = gpio;
509         }
510         return 0;
511 }
512 
513 static int s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev *iodev,
514                         struct sec_platform_data *pdata,
515                         struct device_node *pmic_np)
516 {
517         int i, gpio;
518 
519         for (i = 0; i < 3; i++) {
520                 gpio = of_get_named_gpio(pmic_np,
521                                         "s5m8767,pmic-buck-ds-gpios", i);
522                 if (!gpio_is_valid(gpio)) {
523                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
524                         return -EINVAL;
525                 }
526                 pdata->buck_ds[i] = gpio;
527         }
528         return 0;
529 }
530 
531 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
532                                         struct sec_platform_data *pdata)
533 {
534         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
535         struct device_node *pmic_np, *regulators_np, *reg_np;
536         struct sec_regulator_data *rdata;
537         struct sec_opmode_data *rmode;
538         unsigned int i, dvs_voltage_nr = 8, ret;
539 
540         pmic_np = iodev->dev->of_node;
541         if (!pmic_np) {
542                 dev_err(iodev->dev, "could not find pmic sub-node\n");
543                 return -ENODEV;
544         }
545 
546         regulators_np = of_get_child_by_name(pmic_np, "regulators");
547         if (!regulators_np) {
548                 dev_err(iodev->dev, "could not find regulators sub-node\n");
549                 return -EINVAL;
550         }
551 
552         /* count the number of regulators to be supported in pmic */
553         pdata->num_regulators = of_get_child_count(regulators_np);
554 
555         rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
556                                 pdata->num_regulators, GFP_KERNEL);
557         if (!rdata)
558                 return -ENOMEM;
559 
560         rmode = devm_kzalloc(&pdev->dev, sizeof(*rmode) *
561                                 pdata->num_regulators, GFP_KERNEL);
562         if (!rmode)
563                 return -ENOMEM;
564 
565         pdata->regulators = rdata;
566         pdata->opmode = rmode;
567         for_each_child_of_node(regulators_np, reg_np) {
568                 for (i = 0; i < ARRAY_SIZE(regulators); i++)
569                         if (!of_node_cmp(reg_np->name, regulators[i].name))
570                                 break;
571 
572                 if (i == ARRAY_SIZE(regulators)) {
573                         dev_warn(iodev->dev,
574                         "don't know how to configure regulator %s\n",
575                         reg_np->name);
576                         continue;
577                 }
578 
579                 rdata->ext_control_gpio = of_get_named_gpio(reg_np,
580                         "s5m8767,pmic-ext-control-gpios", 0);
581 
582                 rdata->id = i;
583                 rdata->initdata = of_get_regulator_init_data(
584                                                 &pdev->dev, reg_np);
585                 rdata->reg_node = reg_np;
586                 rdata++;
587                 rmode->id = i;
588                 if (of_property_read_u32(reg_np, "op_mode",
589                                 &rmode->mode)) {
590                         dev_warn(iodev->dev,
591                                 "no op_mode property property at %s\n",
592                                 reg_np->full_name);
593 
594                         rmode->mode = S5M8767_OPMODE_NORMAL_MODE;
595                 }
596                 rmode++;
597         }
598 
599         of_node_put(regulators_np);
600 
601         if (of_get_property(pmic_np, "s5m8767,pmic-buck2-uses-gpio-dvs", NULL)) {
602                 pdata->buck2_gpiodvs = true;
603 
604                 if (of_property_read_u32_array(pmic_np,
605                                 "s5m8767,pmic-buck2-dvs-voltage",
606                                 pdata->buck2_voltage, dvs_voltage_nr)) {
607                         dev_err(iodev->dev, "buck2 voltages not specified\n");
608                         return -EINVAL;
609                 }
610         }
611 
612         if (of_get_property(pmic_np, "s5m8767,pmic-buck3-uses-gpio-dvs", NULL)) {
613                 pdata->buck3_gpiodvs = true;
614 
615                 if (of_property_read_u32_array(pmic_np,
616                                 "s5m8767,pmic-buck3-dvs-voltage",
617                                 pdata->buck3_voltage, dvs_voltage_nr)) {
618                         dev_err(iodev->dev, "buck3 voltages not specified\n");
619                         return -EINVAL;
620                 }
621         }
622 
623         if (of_get_property(pmic_np, "s5m8767,pmic-buck4-uses-gpio-dvs", NULL)) {
624                 pdata->buck4_gpiodvs = true;
625 
626                 if (of_property_read_u32_array(pmic_np,
627                                 "s5m8767,pmic-buck4-dvs-voltage",
628                                 pdata->buck4_voltage, dvs_voltage_nr)) {
629                         dev_err(iodev->dev, "buck4 voltages not specified\n");
630                         return -EINVAL;
631                 }
632         }
633 
634         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
635                                                 pdata->buck4_gpiodvs) {
636                 ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
637                 if (ret)
638                         return -EINVAL;
639 
640                 if (of_property_read_u32(pmic_np,
641                                 "s5m8767,pmic-buck-default-dvs-idx",
642                                 &pdata->buck_default_idx)) {
643                         pdata->buck_default_idx = 0;
644                 } else {
645                         if (pdata->buck_default_idx >= 8) {
646                                 pdata->buck_default_idx = 0;
647                                 dev_info(iodev->dev,
648                                 "invalid value for default dvs index, use 0\n");
649                         }
650                 }
651         }
652 
653         ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np);
654         if (ret)
655                 return -EINVAL;
656 
657         if (of_get_property(pmic_np, "s5m8767,pmic-buck2-ramp-enable", NULL))
658                 pdata->buck2_ramp_enable = true;
659 
660         if (of_get_property(pmic_np, "s5m8767,pmic-buck3-ramp-enable", NULL))
661                 pdata->buck3_ramp_enable = true;
662 
663         if (of_get_property(pmic_np, "s5m8767,pmic-buck4-ramp-enable", NULL))
664                 pdata->buck4_ramp_enable = true;
665 
666         if (pdata->buck2_ramp_enable || pdata->buck3_ramp_enable
667                         || pdata->buck4_ramp_enable) {
668                 if (of_property_read_u32(pmic_np, "s5m8767,pmic-buck-ramp-delay",
669                                 &pdata->buck_ramp_delay))
670                         pdata->buck_ramp_delay = 0;
671         }
672 
673         return 0;
674 }
675 #else
676 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
677                                         struct sec_platform_data *pdata)
678 {
679         return 0;
680 }
681 #endif /* CONFIG_OF */
682 
683 static int s5m8767_pmic_probe(struct platform_device *pdev)
684 {
685         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
686         struct sec_platform_data *pdata = iodev->pdata;
687         struct regulator_config config = { };
688         struct s5m8767_info *s5m8767;
689         int i, ret, buck_init;
690 
691         if (!pdata) {
692                 dev_err(pdev->dev.parent, "Platform data not supplied\n");
693                 return -ENODEV;
694         }
695 
696         if (iodev->dev->of_node) {
697                 ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata);
698                 if (ret)
699                         return ret;
700         }
701 
702         if (pdata->buck2_gpiodvs) {
703                 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
704                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
705                         return -EINVAL;
706                 }
707         }
708 
709         if (pdata->buck3_gpiodvs) {
710                 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
711                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
712                         return -EINVAL;
713                 }
714         }
715 
716         if (pdata->buck4_gpiodvs) {
717                 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
718                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
719                         return -EINVAL;
720                 }
721         }
722 
723         s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
724                                 GFP_KERNEL);
725         if (!s5m8767)
726                 return -ENOMEM;
727 
728         s5m8767->dev = &pdev->dev;
729         s5m8767->iodev = iodev;
730         s5m8767->num_regulators = pdata->num_regulators;
731         platform_set_drvdata(pdev, s5m8767);
732 
733         s5m8767->buck_gpioindex = pdata->buck_default_idx;
734         s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
735         s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
736         s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
737         s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
738         s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
739         s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
740         s5m8767->buck_ds[0] = pdata->buck_ds[0];
741         s5m8767->buck_ds[1] = pdata->buck_ds[1];
742         s5m8767->buck_ds[2] = pdata->buck_ds[2];
743 
744         s5m8767->ramp_delay = pdata->buck_ramp_delay;
745         s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
746         s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
747         s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
748         s5m8767->opmode = pdata->opmode;
749 
750         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
751                                                    pdata->buck2_init);
752 
753         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK2DVS2,
754                         buck_init);
755 
756         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
757                                                    pdata->buck3_init);
758 
759         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK3DVS2,
760                         buck_init);
761 
762         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
763                                                    pdata->buck4_init);
764 
765         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK4DVS2,
766                         buck_init);
767 
768         for (i = 0; i < 8; i++) {
769                 if (s5m8767->buck2_gpiodvs) {
770                         s5m8767->buck2_vol[i] =
771                                 s5m8767_convert_voltage_to_sel(
772                                                 &buck_voltage_val2,
773                                                 pdata->buck2_voltage[i]);
774                 }
775 
776                 if (s5m8767->buck3_gpiodvs) {
777                         s5m8767->buck3_vol[i] =
778                                 s5m8767_convert_voltage_to_sel(
779                                                 &buck_voltage_val2,
780                                                 pdata->buck3_voltage[i]);
781                 }
782 
783                 if (s5m8767->buck4_gpiodvs) {
784                         s5m8767->buck4_vol[i] =
785                                 s5m8767_convert_voltage_to_sel(
786                                                 &buck_voltage_val2,
787                                                 pdata->buck4_voltage[i]);
788                 }
789         }
790 
791         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
792                                                 pdata->buck4_gpiodvs) {
793 
794                 if (!gpio_is_valid(pdata->buck_gpios[0]) ||
795                         !gpio_is_valid(pdata->buck_gpios[1]) ||
796                         !gpio_is_valid(pdata->buck_gpios[2])) {
797                         dev_err(&pdev->dev, "GPIO NOT VALID\n");
798                         return -EINVAL;
799                 }
800 
801                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
802                                         "S5M8767 SET1");
803                 if (ret)
804                         return ret;
805 
806                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
807                                         "S5M8767 SET2");
808                 if (ret)
809                         return ret;
810 
811                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
812                                         "S5M8767 SET3");
813                 if (ret)
814                         return ret;
815 
816                 /* SET1 GPIO */
817                 gpio_direction_output(pdata->buck_gpios[0],
818                                 (s5m8767->buck_gpioindex >> 2) & 0x1);
819                 /* SET2 GPIO */
820                 gpio_direction_output(pdata->buck_gpios[1],
821                                 (s5m8767->buck_gpioindex >> 1) & 0x1);
822                 /* SET3 GPIO */
823                 gpio_direction_output(pdata->buck_gpios[2],
824                                 (s5m8767->buck_gpioindex >> 0) & 0x1);
825         }
826 
827         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
828         if (ret)
829                 return ret;
830 
831         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
832         if (ret)
833                 return ret;
834 
835         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
836         if (ret)
837                 return ret;
838 
839         /* DS2 GPIO */
840         gpio_direction_output(pdata->buck_ds[0], 0x0);
841         /* DS3 GPIO */
842         gpio_direction_output(pdata->buck_ds[1], 0x0);
843         /* DS4 GPIO */
844         gpio_direction_output(pdata->buck_ds[2], 0x0);
845 
846         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
847            pdata->buck4_gpiodvs) {
848                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
849                                 S5M8767_REG_BUCK2CTRL, 1 << 1,
850                                 (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1));
851                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
852                                 S5M8767_REG_BUCK3CTRL, 1 << 1,
853                                 (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1));
854                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
855                                 S5M8767_REG_BUCK4CTRL, 1 << 1,
856                                 (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1));
857         }
858 
859         /* Initialize GPIO DVS registers */
860         for (i = 0; i < 8; i++) {
861                 if (s5m8767->buck2_gpiodvs) {
862                         regmap_write(s5m8767->iodev->regmap_pmic,
863                                         S5M8767_REG_BUCK2DVS1 + i,
864                                         s5m8767->buck2_vol[i]);
865                 }
866 
867                 if (s5m8767->buck3_gpiodvs) {
868                         regmap_write(s5m8767->iodev->regmap_pmic,
869                                         S5M8767_REG_BUCK3DVS1 + i,
870                                         s5m8767->buck3_vol[i]);
871                 }
872 
873                 if (s5m8767->buck4_gpiodvs) {
874                         regmap_write(s5m8767->iodev->regmap_pmic,
875                                         S5M8767_REG_BUCK4DVS1 + i,
876                                         s5m8767->buck4_vol[i]);
877                 }
878         }
879 
880         if (s5m8767->buck2_ramp)
881                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
882                                 S5M8767_REG_DVSRAMP, 0x08, 0x08);
883 
884         if (s5m8767->buck3_ramp)
885                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
886                                 S5M8767_REG_DVSRAMP, 0x04, 0x04);
887 
888         if (s5m8767->buck4_ramp)
889                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
890                                 S5M8767_REG_DVSRAMP, 0x02, 0x02);
891 
892         if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
893                 || s5m8767->buck4_ramp) {
894                 unsigned int val;
895                 switch (s5m8767->ramp_delay) {
896                 case 5:
897                         val = S5M8767_DVS_BUCK_RAMP_5;
898                         break;
899                 case 10:
900                         val = S5M8767_DVS_BUCK_RAMP_10;
901                         break;
902                 case 25:
903                         val = S5M8767_DVS_BUCK_RAMP_25;
904                         break;
905                 case 50:
906                         val = S5M8767_DVS_BUCK_RAMP_50;
907                         break;
908                 case 100:
909                         val = S5M8767_DVS_BUCK_RAMP_100;
910                         break;
911                 default:
912                         val = S5M8767_DVS_BUCK_RAMP_10;
913                 }
914                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
915                                         S5M8767_REG_DVSRAMP,
916                                         S5M8767_DVS_BUCK_RAMP_MASK,
917                                         val << S5M8767_DVS_BUCK_RAMP_SHIFT);
918         }
919 
920         for (i = 0; i < pdata->num_regulators; i++) {
921                 const struct sec_voltage_desc *desc;
922                 int id = pdata->regulators[i].id;
923                 int enable_reg, enable_val;
924                 struct regulator_dev *rdev;
925 
926                 desc = reg_voltage_map[id];
927                 if (desc) {
928                         regulators[id].n_voltages =
929                                 (desc->max - desc->min) / desc->step + 1;
930                         regulators[id].min_uV = desc->min;
931                         regulators[id].uV_step = desc->step;
932                         regulators[id].vsel_reg =
933                                 s5m8767_get_vsel_reg(id, s5m8767);
934                         if (id < S5M8767_BUCK1)
935                                 regulators[id].vsel_mask = 0x3f;
936                         else
937                                 regulators[id].vsel_mask = 0xff;
938 
939                         s5m8767_get_register(s5m8767, id, &enable_reg,
940                                              &enable_val);
941                         regulators[id].enable_reg = enable_reg;
942                         regulators[id].enable_mask = S5M8767_ENCTRL_MASK;
943                         regulators[id].enable_val = enable_val;
944                 }
945 
946                 config.dev = s5m8767->dev;
947                 config.init_data = pdata->regulators[i].initdata;
948                 config.driver_data = s5m8767;
949                 config.regmap = iodev->regmap_pmic;
950                 config.of_node = pdata->regulators[i].reg_node;
951                 config.ena_gpio = -EINVAL;
952                 config.ena_gpio_flags = 0;
953                 if (gpio_is_valid(pdata->regulators[i].ext_control_gpio))
954                         s5m8767_regulator_config_ext_control(s5m8767,
955                                         &pdata->regulators[i], &config);
956 
957                 rdev = devm_regulator_register(&pdev->dev, &regulators[id],
958                                                   &config);
959                 if (IS_ERR(rdev)) {
960                         ret = PTR_ERR(rdev);
961                         dev_err(s5m8767->dev, "regulator init failed for %d\n",
962                                         id);
963                         return ret;
964                 }
965 
966                 if (gpio_is_valid(pdata->regulators[i].ext_control_gpio)) {
967                         ret = s5m8767_enable_ext_control(s5m8767, rdev);
968                         if (ret < 0) {
969                                 dev_err(s5m8767->dev,
970                                                 "failed to enable gpio control over %s: %d\n",
971                                                 rdev->desc->name, ret);
972                                 return ret;
973                         }
974                 }
975         }
976 
977         return 0;
978 }
979 
980 static const struct platform_device_id s5m8767_pmic_id[] = {
981         { "s5m8767-pmic", 0},
982         { },
983 };
984 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
985 
986 static struct platform_driver s5m8767_pmic_driver = {
987         .driver = {
988                 .name = "s5m8767-pmic",
989                 .owner = THIS_MODULE,
990         },
991         .probe = s5m8767_pmic_probe,
992         .id_table = s5m8767_pmic_id,
993 };
994 
995 static int __init s5m8767_pmic_init(void)
996 {
997         return platform_driver_register(&s5m8767_pmic_driver);
998 }
999 subsys_initcall(s5m8767_pmic_init);
1000 
1001 static void __exit s5m8767_pmic_exit(void)
1002 {
1003         platform_driver_unregister(&s5m8767_pmic_driver);
1004 }
1005 module_exit(s5m8767_pmic_exit);
1006 
1007 /* Module information */
1008 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
1009 MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
1010 MODULE_LICENSE("GPL");
1011 

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