Version:  2.0.40 2.2.26 2.4.37 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6

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                 return -EINVAL;
207 
208         *enable_ctrl = s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT;
209 
210         return 0;
211 }
212 
213 static int s5m8767_get_vsel_reg(int reg_id, struct s5m8767_info *s5m8767)
214 {
215         int reg;
216 
217         switch (reg_id) {
218         case S5M8767_LDO1 ... S5M8767_LDO2:
219                 reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
220                 break;
221         case S5M8767_LDO3 ... S5M8767_LDO28:
222                 reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
223                 break;
224         case S5M8767_BUCK1:
225                 reg = S5M8767_REG_BUCK1CTRL2;
226                 break;
227         case S5M8767_BUCK2:
228                 reg = S5M8767_REG_BUCK2DVS1;
229                 if (s5m8767->buck2_gpiodvs)
230                         reg += s5m8767->buck_gpioindex;
231                 break;
232         case S5M8767_BUCK3:
233                 reg = S5M8767_REG_BUCK3DVS1;
234                 if (s5m8767->buck3_gpiodvs)
235                         reg += s5m8767->buck_gpioindex;
236                 break;
237         case S5M8767_BUCK4:
238                 reg = S5M8767_REG_BUCK4DVS1;
239                 if (s5m8767->buck4_gpiodvs)
240                         reg += s5m8767->buck_gpioindex;
241                 break;
242         case S5M8767_BUCK5:
243                 reg = S5M8767_REG_BUCK5CTRL2;
244                 break;
245         case S5M8767_BUCK6 ... S5M8767_BUCK9:
246                 reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
247                 break;
248         default:
249                 return -EINVAL;
250         }
251 
252         return reg;
253 }
254 
255 static int s5m8767_convert_voltage_to_sel(const struct sec_voltage_desc *desc,
256                                           int min_vol)
257 {
258         int selector = 0;
259 
260         if (desc == NULL)
261                 return -EINVAL;
262 
263         if (min_vol > desc->max)
264                 return -EINVAL;
265 
266         if (min_vol < desc->min)
267                 min_vol = desc->min;
268 
269         selector = DIV_ROUND_UP(min_vol - desc->min, desc->step);
270 
271         if (desc->min + desc->step * selector > desc->max)
272                 return -EINVAL;
273 
274         return selector;
275 }
276 
277 static inline int s5m8767_set_high(struct s5m8767_info *s5m8767)
278 {
279         int temp_index = s5m8767->buck_gpioindex;
280 
281         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
282         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
283         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
284 
285         return 0;
286 }
287 
288 static inline int s5m8767_set_low(struct s5m8767_info *s5m8767)
289 {
290         int temp_index = s5m8767->buck_gpioindex;
291 
292         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
293         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
294         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
295 
296         return 0;
297 }
298 
299 static int s5m8767_set_voltage_sel(struct regulator_dev *rdev,
300                                    unsigned selector)
301 {
302         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
303         int reg_id = rdev_get_id(rdev);
304         int old_index, index = 0;
305         u8 *buck234_vol = NULL;
306 
307         switch (reg_id) {
308         case S5M8767_LDO1 ... S5M8767_LDO28:
309                 break;
310         case S5M8767_BUCK1 ... S5M8767_BUCK6:
311                 if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs)
312                         buck234_vol = &s5m8767->buck2_vol[0];
313                 else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs)
314                         buck234_vol = &s5m8767->buck3_vol[0];
315                 else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs)
316                         buck234_vol = &s5m8767->buck4_vol[0];
317                 break;
318         case S5M8767_BUCK7 ... S5M8767_BUCK8:
319                 return -EINVAL;
320         case S5M8767_BUCK9:
321                 break;
322         default:
323                 return -EINVAL;
324         }
325 
326         /* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */
327         if (buck234_vol) {
328                 while (*buck234_vol != selector) {
329                         buck234_vol++;
330                         index++;
331                 }
332                 old_index = s5m8767->buck_gpioindex;
333                 s5m8767->buck_gpioindex = index;
334 
335                 if (index > old_index)
336                         return s5m8767_set_high(s5m8767);
337                 else
338                         return s5m8767_set_low(s5m8767);
339         } else {
340                 return regulator_set_voltage_sel_regmap(rdev, selector);
341         }
342 }
343 
344 static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
345                                              unsigned int old_sel,
346                                              unsigned int new_sel)
347 {
348         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
349         const struct sec_voltage_desc *desc;
350         int reg_id = rdev_get_id(rdev);
351 
352         desc = reg_voltage_map[reg_id];
353 
354         if ((old_sel < new_sel) && s5m8767->ramp_delay)
355                 return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
356                                         s5m8767->ramp_delay * 1000);
357         return 0;
358 }
359 
360 static struct regulator_ops s5m8767_ops = {
361         .list_voltage           = regulator_list_voltage_linear,
362         .is_enabled             = regulator_is_enabled_regmap,
363         .enable                 = regulator_enable_regmap,
364         .disable                = regulator_disable_regmap,
365         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
366         .set_voltage_sel        = s5m8767_set_voltage_sel,
367         .set_voltage_time_sel   = s5m8767_set_voltage_time_sel,
368 };
369 
370 static struct regulator_ops s5m8767_buck78_ops = {
371         .list_voltage           = regulator_list_voltage_linear,
372         .is_enabled             = regulator_is_enabled_regmap,
373         .enable                 = regulator_enable_regmap,
374         .disable                = regulator_disable_regmap,
375         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
376         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
377 };
378 
379 #define s5m8767_regulator_desc(_name) {         \
380         .name           = #_name,               \
381         .id             = S5M8767_##_name,      \
382         .ops            = &s5m8767_ops,         \
383         .type           = REGULATOR_VOLTAGE,    \
384         .owner          = THIS_MODULE,          \
385 }
386 
387 #define s5m8767_regulator_buck78_desc(_name) {  \
388         .name           = #_name,               \
389         .id             = S5M8767_##_name,      \
390         .ops            = &s5m8767_buck78_ops,  \
391         .type           = REGULATOR_VOLTAGE,    \
392         .owner          = THIS_MODULE,          \
393 }
394 
395 static struct regulator_desc regulators[] = {
396         s5m8767_regulator_desc(LDO1),
397         s5m8767_regulator_desc(LDO2),
398         s5m8767_regulator_desc(LDO3),
399         s5m8767_regulator_desc(LDO4),
400         s5m8767_regulator_desc(LDO5),
401         s5m8767_regulator_desc(LDO6),
402         s5m8767_regulator_desc(LDO7),
403         s5m8767_regulator_desc(LDO8),
404         s5m8767_regulator_desc(LDO9),
405         s5m8767_regulator_desc(LDO10),
406         s5m8767_regulator_desc(LDO11),
407         s5m8767_regulator_desc(LDO12),
408         s5m8767_regulator_desc(LDO13),
409         s5m8767_regulator_desc(LDO14),
410         s5m8767_regulator_desc(LDO15),
411         s5m8767_regulator_desc(LDO16),
412         s5m8767_regulator_desc(LDO17),
413         s5m8767_regulator_desc(LDO18),
414         s5m8767_regulator_desc(LDO19),
415         s5m8767_regulator_desc(LDO20),
416         s5m8767_regulator_desc(LDO21),
417         s5m8767_regulator_desc(LDO22),
418         s5m8767_regulator_desc(LDO23),
419         s5m8767_regulator_desc(LDO24),
420         s5m8767_regulator_desc(LDO25),
421         s5m8767_regulator_desc(LDO26),
422         s5m8767_regulator_desc(LDO27),
423         s5m8767_regulator_desc(LDO28),
424         s5m8767_regulator_desc(BUCK1),
425         s5m8767_regulator_desc(BUCK2),
426         s5m8767_regulator_desc(BUCK3),
427         s5m8767_regulator_desc(BUCK4),
428         s5m8767_regulator_desc(BUCK5),
429         s5m8767_regulator_desc(BUCK6),
430         s5m8767_regulator_buck78_desc(BUCK7),
431         s5m8767_regulator_buck78_desc(BUCK8),
432         s5m8767_regulator_desc(BUCK9),
433 };
434 
435 /*
436  * Enable GPIO control over BUCK9 in regulator_config for that regulator.
437  */
438 static void s5m8767_regulator_config_ext_control(struct s5m8767_info *s5m8767,
439                 struct sec_regulator_data *rdata,
440                 struct regulator_config *config)
441 {
442         int i, mode = 0;
443 
444         if (rdata->id != S5M8767_BUCK9)
445                 return;
446 
447         /* Check if opmode for regulator matches S5M8767_ENCTRL_USE_GPIO */
448         for (i = 0; i < s5m8767->num_regulators; i++) {
449                 const struct sec_opmode_data *opmode = &s5m8767->opmode[i];
450                 if (opmode->id == rdata->id) {
451                         mode = s5m8767_opmode_reg[rdata->id][opmode->mode];
452                         break;
453                 }
454         }
455         if (mode != S5M8767_ENCTRL_USE_GPIO) {
456                 dev_warn(s5m8767->dev,
457                                 "ext-control for %s: mismatched op_mode (%x), ignoring\n",
458                                 rdata->reg_node->name, mode);
459                 return;
460         }
461 
462         if (!gpio_is_valid(rdata->ext_control_gpio)) {
463                 dev_warn(s5m8767->dev,
464                                 "ext-control for %s: GPIO not valid, ignoring\n",
465                                 rdata->reg_node->name);
466                 return;
467         }
468 
469         config->ena_gpio = rdata->ext_control_gpio;
470         config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
471 }
472 
473 /*
474  * Turn on GPIO control over BUCK9.
475  */
476 static int s5m8767_enable_ext_control(struct s5m8767_info *s5m8767,
477                 struct regulator_dev *rdev)
478 {
479         int id = rdev_get_id(rdev);
480         int ret, reg, enable_ctrl;
481 
482         if (id != S5M8767_BUCK9)
483                 return -EINVAL;
484 
485         ret = s5m8767_get_register(s5m8767, id, &reg, &enable_ctrl);
486         if (ret)
487                 return ret;
488 
489         return regmap_update_bits(s5m8767->iodev->regmap_pmic,
490                         reg, S5M8767_ENCTRL_MASK,
491                         S5M8767_ENCTRL_USE_GPIO << S5M8767_ENCTRL_SHIFT);
492 }
493 
494 
495 #ifdef CONFIG_OF
496 static int s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev *iodev,
497                         struct sec_platform_data *pdata,
498                         struct device_node *pmic_np)
499 {
500         int i, gpio;
501 
502         for (i = 0; i < 3; i++) {
503                 gpio = of_get_named_gpio(pmic_np,
504                                         "s5m8767,pmic-buck-dvs-gpios", i);
505                 if (!gpio_is_valid(gpio)) {
506                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
507                         return -EINVAL;
508                 }
509                 pdata->buck_gpios[i] = gpio;
510         }
511         return 0;
512 }
513 
514 static int s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev *iodev,
515                         struct sec_platform_data *pdata,
516                         struct device_node *pmic_np)
517 {
518         int i, gpio;
519 
520         for (i = 0; i < 3; i++) {
521                 gpio = of_get_named_gpio(pmic_np,
522                                         "s5m8767,pmic-buck-ds-gpios", i);
523                 if (!gpio_is_valid(gpio)) {
524                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
525                         return -EINVAL;
526                 }
527                 pdata->buck_ds[i] = gpio;
528         }
529         return 0;
530 }
531 
532 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
533                                         struct sec_platform_data *pdata)
534 {
535         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
536         struct device_node *pmic_np, *regulators_np, *reg_np;
537         struct sec_regulator_data *rdata;
538         struct sec_opmode_data *rmode;
539         unsigned int i, dvs_voltage_nr = 8, ret;
540 
541         pmic_np = iodev->dev->of_node;
542         if (!pmic_np) {
543                 dev_err(iodev->dev, "could not find pmic sub-node\n");
544                 return -ENODEV;
545         }
546 
547         regulators_np = of_get_child_by_name(pmic_np, "regulators");
548         if (!regulators_np) {
549                 dev_err(iodev->dev, "could not find regulators sub-node\n");
550                 return -EINVAL;
551         }
552 
553         /* count the number of regulators to be supported in pmic */
554         pdata->num_regulators = of_get_child_count(regulators_np);
555 
556         rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
557                                 pdata->num_regulators, GFP_KERNEL);
558         if (!rdata)
559                 return -ENOMEM;
560 
561         rmode = devm_kzalloc(&pdev->dev, sizeof(*rmode) *
562                                 pdata->num_regulators, GFP_KERNEL);
563         if (!rmode)
564                 return -ENOMEM;
565 
566         pdata->regulators = rdata;
567         pdata->opmode = rmode;
568         for_each_child_of_node(regulators_np, reg_np) {
569                 for (i = 0; i < ARRAY_SIZE(regulators); i++)
570                         if (!of_node_cmp(reg_np->name, regulators[i].name))
571                                 break;
572 
573                 if (i == ARRAY_SIZE(regulators)) {
574                         dev_warn(iodev->dev,
575                         "don't know how to configure regulator %s\n",
576                         reg_np->name);
577                         continue;
578                 }
579 
580                 rdata->ext_control_gpio = of_get_named_gpio(reg_np,
581                         "s5m8767,pmic-ext-control-gpios", 0);
582 
583                 rdata->id = i;
584                 rdata->initdata = of_get_regulator_init_data(
585                                                 &pdev->dev, reg_np,
586                                                 &regulators[i]);
587                 rdata->reg_node = reg_np;
588                 rdata++;
589                 rmode->id = i;
590                 if (of_property_read_u32(reg_np, "op_mode",
591                                 &rmode->mode)) {
592                         dev_warn(iodev->dev,
593                                 "no op_mode property property at %s\n",
594                                 reg_np->full_name);
595 
596                         rmode->mode = S5M8767_OPMODE_NORMAL_MODE;
597                 }
598                 rmode++;
599         }
600 
601         of_node_put(regulators_np);
602 
603         if (of_get_property(pmic_np, "s5m8767,pmic-buck2-uses-gpio-dvs", NULL)) {
604                 pdata->buck2_gpiodvs = true;
605 
606                 if (of_property_read_u32_array(pmic_np,
607                                 "s5m8767,pmic-buck2-dvs-voltage",
608                                 pdata->buck2_voltage, dvs_voltage_nr)) {
609                         dev_err(iodev->dev, "buck2 voltages not specified\n");
610                         return -EINVAL;
611                 }
612         }
613 
614         if (of_get_property(pmic_np, "s5m8767,pmic-buck3-uses-gpio-dvs", NULL)) {
615                 pdata->buck3_gpiodvs = true;
616 
617                 if (of_property_read_u32_array(pmic_np,
618                                 "s5m8767,pmic-buck3-dvs-voltage",
619                                 pdata->buck3_voltage, dvs_voltage_nr)) {
620                         dev_err(iodev->dev, "buck3 voltages not specified\n");
621                         return -EINVAL;
622                 }
623         }
624 
625         if (of_get_property(pmic_np, "s5m8767,pmic-buck4-uses-gpio-dvs", NULL)) {
626                 pdata->buck4_gpiodvs = true;
627 
628                 if (of_property_read_u32_array(pmic_np,
629                                 "s5m8767,pmic-buck4-dvs-voltage",
630                                 pdata->buck4_voltage, dvs_voltage_nr)) {
631                         dev_err(iodev->dev, "buck4 voltages not specified\n");
632                         return -EINVAL;
633                 }
634         }
635 
636         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
637                                                 pdata->buck4_gpiodvs) {
638                 ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
639                 if (ret)
640                         return -EINVAL;
641 
642                 if (of_property_read_u32(pmic_np,
643                                 "s5m8767,pmic-buck-default-dvs-idx",
644                                 &pdata->buck_default_idx)) {
645                         pdata->buck_default_idx = 0;
646                 } else {
647                         if (pdata->buck_default_idx >= 8) {
648                                 pdata->buck_default_idx = 0;
649                                 dev_info(iodev->dev,
650                                 "invalid value for default dvs index, use 0\n");
651                         }
652                 }
653         }
654 
655         ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np);
656         if (ret)
657                 return -EINVAL;
658 
659         if (of_get_property(pmic_np, "s5m8767,pmic-buck2-ramp-enable", NULL))
660                 pdata->buck2_ramp_enable = true;
661 
662         if (of_get_property(pmic_np, "s5m8767,pmic-buck3-ramp-enable", NULL))
663                 pdata->buck3_ramp_enable = true;
664 
665         if (of_get_property(pmic_np, "s5m8767,pmic-buck4-ramp-enable", NULL))
666                 pdata->buck4_ramp_enable = true;
667 
668         if (pdata->buck2_ramp_enable || pdata->buck3_ramp_enable
669                         || pdata->buck4_ramp_enable) {
670                 if (of_property_read_u32(pmic_np, "s5m8767,pmic-buck-ramp-delay",
671                                 &pdata->buck_ramp_delay))
672                         pdata->buck_ramp_delay = 0;
673         }
674 
675         return 0;
676 }
677 #else
678 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
679                                         struct sec_platform_data *pdata)
680 {
681         return 0;
682 }
683 #endif /* CONFIG_OF */
684 
685 static int s5m8767_pmic_probe(struct platform_device *pdev)
686 {
687         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
688         struct sec_platform_data *pdata = iodev->pdata;
689         struct regulator_config config = { };
690         struct s5m8767_info *s5m8767;
691         int i, ret, buck_init;
692 
693         if (!pdata) {
694                 dev_err(pdev->dev.parent, "Platform data not supplied\n");
695                 return -ENODEV;
696         }
697 
698         if (iodev->dev->of_node) {
699                 ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata);
700                 if (ret)
701                         return ret;
702         }
703 
704         if (pdata->buck2_gpiodvs) {
705                 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
706                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
707                         return -EINVAL;
708                 }
709         }
710 
711         if (pdata->buck3_gpiodvs) {
712                 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
713                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
714                         return -EINVAL;
715                 }
716         }
717 
718         if (pdata->buck4_gpiodvs) {
719                 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
720                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
721                         return -EINVAL;
722                 }
723         }
724 
725         s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
726                                 GFP_KERNEL);
727         if (!s5m8767)
728                 return -ENOMEM;
729 
730         s5m8767->dev = &pdev->dev;
731         s5m8767->iodev = iodev;
732         s5m8767->num_regulators = pdata->num_regulators;
733         platform_set_drvdata(pdev, s5m8767);
734 
735         s5m8767->buck_gpioindex = pdata->buck_default_idx;
736         s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
737         s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
738         s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
739         s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
740         s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
741         s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
742         s5m8767->buck_ds[0] = pdata->buck_ds[0];
743         s5m8767->buck_ds[1] = pdata->buck_ds[1];
744         s5m8767->buck_ds[2] = pdata->buck_ds[2];
745 
746         s5m8767->ramp_delay = pdata->buck_ramp_delay;
747         s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
748         s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
749         s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
750         s5m8767->opmode = pdata->opmode;
751 
752         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
753                                                    pdata->buck2_init);
754 
755         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK2DVS2,
756                         buck_init);
757 
758         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
759                                                    pdata->buck3_init);
760 
761         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK3DVS2,
762                         buck_init);
763 
764         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
765                                                    pdata->buck4_init);
766 
767         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK4DVS2,
768                         buck_init);
769 
770         for (i = 0; i < 8; i++) {
771                 if (s5m8767->buck2_gpiodvs) {
772                         s5m8767->buck2_vol[i] =
773                                 s5m8767_convert_voltage_to_sel(
774                                                 &buck_voltage_val2,
775                                                 pdata->buck2_voltage[i]);
776                 }
777 
778                 if (s5m8767->buck3_gpiodvs) {
779                         s5m8767->buck3_vol[i] =
780                                 s5m8767_convert_voltage_to_sel(
781                                                 &buck_voltage_val2,
782                                                 pdata->buck3_voltage[i]);
783                 }
784 
785                 if (s5m8767->buck4_gpiodvs) {
786                         s5m8767->buck4_vol[i] =
787                                 s5m8767_convert_voltage_to_sel(
788                                                 &buck_voltage_val2,
789                                                 pdata->buck4_voltage[i]);
790                 }
791         }
792 
793         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
794                                                 pdata->buck4_gpiodvs) {
795 
796                 if (!gpio_is_valid(pdata->buck_gpios[0]) ||
797                         !gpio_is_valid(pdata->buck_gpios[1]) ||
798                         !gpio_is_valid(pdata->buck_gpios[2])) {
799                         dev_err(&pdev->dev, "GPIO NOT VALID\n");
800                         return -EINVAL;
801                 }
802 
803                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
804                                         "S5M8767 SET1");
805                 if (ret)
806                         return ret;
807 
808                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
809                                         "S5M8767 SET2");
810                 if (ret)
811                         return ret;
812 
813                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
814                                         "S5M8767 SET3");
815                 if (ret)
816                         return ret;
817 
818                 /* SET1 GPIO */
819                 gpio_direction_output(pdata->buck_gpios[0],
820                                 (s5m8767->buck_gpioindex >> 2) & 0x1);
821                 /* SET2 GPIO */
822                 gpio_direction_output(pdata->buck_gpios[1],
823                                 (s5m8767->buck_gpioindex >> 1) & 0x1);
824                 /* SET3 GPIO */
825                 gpio_direction_output(pdata->buck_gpios[2],
826                                 (s5m8767->buck_gpioindex >> 0) & 0x1);
827         }
828 
829         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
830         if (ret)
831                 return ret;
832 
833         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
834         if (ret)
835                 return ret;
836 
837         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
838         if (ret)
839                 return ret;
840 
841         /* DS2 GPIO */
842         gpio_direction_output(pdata->buck_ds[0], 0x0);
843         /* DS3 GPIO */
844         gpio_direction_output(pdata->buck_ds[1], 0x0);
845         /* DS4 GPIO */
846         gpio_direction_output(pdata->buck_ds[2], 0x0);
847 
848         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
849            pdata->buck4_gpiodvs) {
850                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
851                                 S5M8767_REG_BUCK2CTRL, 1 << 1,
852                                 (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1));
853                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
854                                 S5M8767_REG_BUCK3CTRL, 1 << 1,
855                                 (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1));
856                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
857                                 S5M8767_REG_BUCK4CTRL, 1 << 1,
858                                 (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1));
859         }
860 
861         /* Initialize GPIO DVS registers */
862         for (i = 0; i < 8; i++) {
863                 if (s5m8767->buck2_gpiodvs) {
864                         regmap_write(s5m8767->iodev->regmap_pmic,
865                                         S5M8767_REG_BUCK2DVS1 + i,
866                                         s5m8767->buck2_vol[i]);
867                 }
868 
869                 if (s5m8767->buck3_gpiodvs) {
870                         regmap_write(s5m8767->iodev->regmap_pmic,
871                                         S5M8767_REG_BUCK3DVS1 + i,
872                                         s5m8767->buck3_vol[i]);
873                 }
874 
875                 if (s5m8767->buck4_gpiodvs) {
876                         regmap_write(s5m8767->iodev->regmap_pmic,
877                                         S5M8767_REG_BUCK4DVS1 + i,
878                                         s5m8767->buck4_vol[i]);
879                 }
880         }
881 
882         if (s5m8767->buck2_ramp)
883                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
884                                 S5M8767_REG_DVSRAMP, 0x08, 0x08);
885 
886         if (s5m8767->buck3_ramp)
887                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
888                                 S5M8767_REG_DVSRAMP, 0x04, 0x04);
889 
890         if (s5m8767->buck4_ramp)
891                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
892                                 S5M8767_REG_DVSRAMP, 0x02, 0x02);
893 
894         if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
895                 || s5m8767->buck4_ramp) {
896                 unsigned int val;
897                 switch (s5m8767->ramp_delay) {
898                 case 5:
899                         val = S5M8767_DVS_BUCK_RAMP_5;
900                         break;
901                 case 10:
902                         val = S5M8767_DVS_BUCK_RAMP_10;
903                         break;
904                 case 25:
905                         val = S5M8767_DVS_BUCK_RAMP_25;
906                         break;
907                 case 50:
908                         val = S5M8767_DVS_BUCK_RAMP_50;
909                         break;
910                 case 100:
911                         val = S5M8767_DVS_BUCK_RAMP_100;
912                         break;
913                 default:
914                         val = S5M8767_DVS_BUCK_RAMP_10;
915                 }
916                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
917                                         S5M8767_REG_DVSRAMP,
918                                         S5M8767_DVS_BUCK_RAMP_MASK,
919                                         val << S5M8767_DVS_BUCK_RAMP_SHIFT);
920         }
921 
922         for (i = 0; i < pdata->num_regulators; i++) {
923                 const struct sec_voltage_desc *desc;
924                 int id = pdata->regulators[i].id;
925                 int enable_reg, enable_val;
926                 struct regulator_dev *rdev;
927 
928                 desc = reg_voltage_map[id];
929                 if (desc) {
930                         regulators[id].n_voltages =
931                                 (desc->max - desc->min) / desc->step + 1;
932                         regulators[id].min_uV = desc->min;
933                         regulators[id].uV_step = desc->step;
934                         regulators[id].vsel_reg =
935                                 s5m8767_get_vsel_reg(id, s5m8767);
936                         if (id < S5M8767_BUCK1)
937                                 regulators[id].vsel_mask = 0x3f;
938                         else
939                                 regulators[id].vsel_mask = 0xff;
940 
941                         ret = s5m8767_get_register(s5m8767, id, &enable_reg,
942                                              &enable_val);
943                         if (ret) {
944                                 dev_err(s5m8767->dev, "error reading registers\n");
945                                 return ret;
946                         }
947                         regulators[id].enable_reg = enable_reg;
948                         regulators[id].enable_mask = S5M8767_ENCTRL_MASK;
949                         regulators[id].enable_val = enable_val;
950                 }
951 
952                 config.dev = s5m8767->dev;
953                 config.init_data = pdata->regulators[i].initdata;
954                 config.driver_data = s5m8767;
955                 config.regmap = iodev->regmap_pmic;
956                 config.of_node = pdata->regulators[i].reg_node;
957                 config.ena_gpio = -EINVAL;
958                 config.ena_gpio_flags = 0;
959                 config.ena_gpio_initialized = true;
960                 if (gpio_is_valid(pdata->regulators[i].ext_control_gpio))
961                         s5m8767_regulator_config_ext_control(s5m8767,
962                                         &pdata->regulators[i], &config);
963 
964                 rdev = devm_regulator_register(&pdev->dev, &regulators[id],
965                                                   &config);
966                 if (IS_ERR(rdev)) {
967                         ret = PTR_ERR(rdev);
968                         dev_err(s5m8767->dev, "regulator init failed for %d\n",
969                                         id);
970                         return ret;
971                 }
972 
973                 if (gpio_is_valid(pdata->regulators[i].ext_control_gpio)) {
974                         ret = s5m8767_enable_ext_control(s5m8767, rdev);
975                         if (ret < 0) {
976                                 dev_err(s5m8767->dev,
977                                                 "failed to enable gpio control over %s: %d\n",
978                                                 rdev->desc->name, ret);
979                                 return ret;
980                         }
981                 }
982         }
983 
984         return 0;
985 }
986 
987 static const struct platform_device_id s5m8767_pmic_id[] = {
988         { "s5m8767-pmic", 0},
989         { },
990 };
991 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
992 
993 static struct platform_driver s5m8767_pmic_driver = {
994         .driver = {
995                 .name = "s5m8767-pmic",
996         },
997         .probe = s5m8767_pmic_probe,
998         .id_table = s5m8767_pmic_id,
999 };
1000 
1001 static int __init s5m8767_pmic_init(void)
1002 {
1003         return platform_driver_register(&s5m8767_pmic_driver);
1004 }
1005 subsys_initcall(s5m8767_pmic_init);
1006 
1007 static void __exit s5m8767_pmic_exit(void)
1008 {
1009         platform_driver_unregister(&s5m8767_pmic_driver);
1010 }
1011 module_exit(s5m8767_pmic_exit);
1012 
1013 /* Module information */
1014 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
1015 MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
1016 MODULE_LICENSE("GPL");
1017 

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