Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
[linux-2.6-microblaze.git] / drivers / regulator / s5m8767.c
1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // Copyright (c) 2011 Samsung Electronics Co., Ltd
4 //              http://www.samsung.com
5
6 #include <linux/err.h>
7 #include <linux/of_gpio.h>
8 #include <linux/gpio/consumer.h>
9 #include <linux/module.h>
10 #include <linux/platform_device.h>
11 #include <linux/regulator/driver.h>
12 #include <linux/regulator/machine.h>
13 #include <linux/mfd/samsung/core.h>
14 #include <linux/mfd/samsung/s5m8767.h>
15 #include <linux/regulator/of_regulator.h>
16 #include <linux/regmap.h>
17
18 #define S5M8767_OPMODE_NORMAL_MODE 0x1
19
20 struct s5m8767_info {
21         struct device *dev;
22         struct sec_pmic_dev *iodev;
23         int num_regulators;
24         struct sec_opmode_data *opmode;
25
26         int ramp_delay;
27         bool buck2_ramp;
28         bool buck3_ramp;
29         bool buck4_ramp;
30
31         bool buck2_gpiodvs;
32         bool buck3_gpiodvs;
33         bool buck4_gpiodvs;
34         u8 buck2_vol[8];
35         u8 buck3_vol[8];
36         u8 buck4_vol[8];
37         int buck_gpios[3];
38         int buck_ds[3];
39         int buck_gpioindex;
40 };
41
42 struct sec_voltage_desc {
43         int max;
44         int min;
45         int step;
46 };
47
48 static const struct sec_voltage_desc buck_voltage_val1 = {
49         .max = 2225000,
50         .min =  650000,
51         .step =   6250,
52 };
53
54 static const struct sec_voltage_desc buck_voltage_val2 = {
55         .max = 1600000,
56         .min =  600000,
57         .step =   6250,
58 };
59
60 static const struct sec_voltage_desc buck_voltage_val3 = {
61         .max = 3000000,
62         .min =  750000,
63         .step =  12500,
64 };
65
66 static const struct sec_voltage_desc ldo_voltage_val1 = {
67         .max = 3950000,
68         .min =  800000,
69         .step =  50000,
70 };
71
72 static const struct sec_voltage_desc ldo_voltage_val2 = {
73         .max = 2375000,
74         .min =  800000,
75         .step =  25000,
76 };
77
78 static const struct sec_voltage_desc *reg_voltage_map[] = {
79         [S5M8767_LDO1] = &ldo_voltage_val2,
80         [S5M8767_LDO2] = &ldo_voltage_val2,
81         [S5M8767_LDO3] = &ldo_voltage_val1,
82         [S5M8767_LDO4] = &ldo_voltage_val1,
83         [S5M8767_LDO5] = &ldo_voltage_val1,
84         [S5M8767_LDO6] = &ldo_voltage_val2,
85         [S5M8767_LDO7] = &ldo_voltage_val2,
86         [S5M8767_LDO8] = &ldo_voltage_val2,
87         [S5M8767_LDO9] = &ldo_voltage_val1,
88         [S5M8767_LDO10] = &ldo_voltage_val1,
89         [S5M8767_LDO11] = &ldo_voltage_val1,
90         [S5M8767_LDO12] = &ldo_voltage_val1,
91         [S5M8767_LDO13] = &ldo_voltage_val1,
92         [S5M8767_LDO14] = &ldo_voltage_val1,
93         [S5M8767_LDO15] = &ldo_voltage_val2,
94         [S5M8767_LDO16] = &ldo_voltage_val1,
95         [S5M8767_LDO17] = &ldo_voltage_val1,
96         [S5M8767_LDO18] = &ldo_voltage_val1,
97         [S5M8767_LDO19] = &ldo_voltage_val1,
98         [S5M8767_LDO20] = &ldo_voltage_val1,
99         [S5M8767_LDO21] = &ldo_voltage_val1,
100         [S5M8767_LDO22] = &ldo_voltage_val1,
101         [S5M8767_LDO23] = &ldo_voltage_val1,
102         [S5M8767_LDO24] = &ldo_voltage_val1,
103         [S5M8767_LDO25] = &ldo_voltage_val1,
104         [S5M8767_LDO26] = &ldo_voltage_val1,
105         [S5M8767_LDO27] = &ldo_voltage_val1,
106         [S5M8767_LDO28] = &ldo_voltage_val1,
107         [S5M8767_BUCK1] = &buck_voltage_val1,
108         [S5M8767_BUCK2] = &buck_voltage_val2,
109         [S5M8767_BUCK3] = &buck_voltage_val2,
110         [S5M8767_BUCK4] = &buck_voltage_val2,
111         [S5M8767_BUCK5] = &buck_voltage_val1,
112         [S5M8767_BUCK6] = &buck_voltage_val1,
113         [S5M8767_BUCK7] = &buck_voltage_val3,
114         [S5M8767_BUCK8] = &buck_voltage_val3,
115         [S5M8767_BUCK9] = &buck_voltage_val3,
116 };
117
118 static unsigned int s5m8767_opmode_reg[][4] = {
119         /* {OFF, ON, LOWPOWER, SUSPEND} */
120         /* LDO1 ... LDO28 */
121         {0x0, 0x3, 0x2, 0x1}, /* LDO1 */
122         {0x0, 0x3, 0x2, 0x1},
123         {0x0, 0x3, 0x2, 0x1},
124         {0x0, 0x0, 0x0, 0x0},
125         {0x0, 0x3, 0x2, 0x1}, /* LDO5 */
126         {0x0, 0x3, 0x2, 0x1},
127         {0x0, 0x3, 0x2, 0x1},
128         {0x0, 0x3, 0x2, 0x1},
129         {0x0, 0x3, 0x2, 0x1},
130         {0x0, 0x3, 0x2, 0x1}, /* LDO10 */
131         {0x0, 0x3, 0x2, 0x1},
132         {0x0, 0x3, 0x2, 0x1},
133         {0x0, 0x3, 0x2, 0x1},
134         {0x0, 0x3, 0x2, 0x1},
135         {0x0, 0x3, 0x2, 0x1}, /* LDO15 */
136         {0x0, 0x3, 0x2, 0x1},
137         {0x0, 0x3, 0x2, 0x1},
138         {0x0, 0x0, 0x0, 0x0},
139         {0x0, 0x3, 0x2, 0x1},
140         {0x0, 0x3, 0x2, 0x1}, /* LDO20 */
141         {0x0, 0x3, 0x2, 0x1},
142         {0x0, 0x3, 0x2, 0x1},
143         {0x0, 0x0, 0x0, 0x0},
144         {0x0, 0x3, 0x2, 0x1},
145         {0x0, 0x3, 0x2, 0x1}, /* LDO25 */
146         {0x0, 0x3, 0x2, 0x1},
147         {0x0, 0x3, 0x2, 0x1},
148         {0x0, 0x3, 0x2, 0x1}, /* LDO28 */
149
150         /* BUCK1 ... BUCK9 */
151         {0x0, 0x3, 0x1, 0x1}, /* BUCK1 */
152         {0x0, 0x3, 0x1, 0x1},
153         {0x0, 0x3, 0x1, 0x1},
154         {0x0, 0x3, 0x1, 0x1},
155         {0x0, 0x3, 0x2, 0x1}, /* BUCK5 */
156         {0x0, 0x3, 0x1, 0x1},
157         {0x0, 0x3, 0x1, 0x1},
158         {0x0, 0x3, 0x1, 0x1},
159         {0x0, 0x3, 0x1, 0x1}, /* BUCK9 */
160 };
161
162 static int s5m8767_get_register(struct s5m8767_info *s5m8767, int reg_id,
163                                 int *reg, int *enable_ctrl)
164 {
165         int i;
166         unsigned int mode;
167
168         switch (reg_id) {
169         case S5M8767_LDO1 ... S5M8767_LDO2:
170                 *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
171                 break;
172         case S5M8767_LDO3 ... S5M8767_LDO28:
173                 *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
174                 break;
175         case S5M8767_BUCK1:
176                 *reg = S5M8767_REG_BUCK1CTRL1;
177                 break;
178         case S5M8767_BUCK2 ... S5M8767_BUCK4:
179                 *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9;
180                 break;
181         case S5M8767_BUCK5:
182                 *reg = S5M8767_REG_BUCK5CTRL1;
183                 break;
184         case S5M8767_BUCK6 ... S5M8767_BUCK9:
185                 *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2;
186                 break;
187         default:
188                 return -EINVAL;
189         }
190
191         for (i = 0; i < s5m8767->num_regulators; i++) {
192                 if (s5m8767->opmode[i].id == reg_id) {
193                         mode = s5m8767->opmode[i].mode;
194                         break;
195                 }
196         }
197
198         if (i >= s5m8767->num_regulators)
199                 return -EINVAL;
200
201         *enable_ctrl = s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT;
202
203         return 0;
204 }
205
206 static int s5m8767_get_vsel_reg(int reg_id, struct s5m8767_info *s5m8767)
207 {
208         int reg;
209
210         switch (reg_id) {
211         case S5M8767_LDO1 ... S5M8767_LDO2:
212                 reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
213                 break;
214         case S5M8767_LDO3 ... S5M8767_LDO28:
215                 reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
216                 break;
217         case S5M8767_BUCK1:
218                 reg = S5M8767_REG_BUCK1CTRL2;
219                 break;
220         case S5M8767_BUCK2:
221                 reg = S5M8767_REG_BUCK2DVS1;
222                 if (s5m8767->buck2_gpiodvs)
223                         reg += s5m8767->buck_gpioindex;
224                 break;
225         case S5M8767_BUCK3:
226                 reg = S5M8767_REG_BUCK3DVS1;
227                 if (s5m8767->buck3_gpiodvs)
228                         reg += s5m8767->buck_gpioindex;
229                 break;
230         case S5M8767_BUCK4:
231                 reg = S5M8767_REG_BUCK4DVS1;
232                 if (s5m8767->buck4_gpiodvs)
233                         reg += s5m8767->buck_gpioindex;
234                 break;
235         case S5M8767_BUCK5:
236                 reg = S5M8767_REG_BUCK5CTRL2;
237                 break;
238         case S5M8767_BUCK6 ... S5M8767_BUCK9:
239                 reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
240                 break;
241         default:
242                 return -EINVAL;
243         }
244
245         return reg;
246 }
247
248 static int s5m8767_convert_voltage_to_sel(const struct sec_voltage_desc *desc,
249                                           int min_vol)
250 {
251         int selector = 0;
252
253         if (desc == NULL)
254                 return -EINVAL;
255
256         if (min_vol > desc->max)
257                 return -EINVAL;
258
259         if (min_vol < desc->min)
260                 min_vol = desc->min;
261
262         selector = DIV_ROUND_UP(min_vol - desc->min, desc->step);
263
264         if (desc->min + desc->step * selector > desc->max)
265                 return -EINVAL;
266
267         return selector;
268 }
269
270 static inline int s5m8767_set_high(struct s5m8767_info *s5m8767)
271 {
272         int temp_index = s5m8767->buck_gpioindex;
273
274         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
275         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
276         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
277
278         return 0;
279 }
280
281 static inline int s5m8767_set_low(struct s5m8767_info *s5m8767)
282 {
283         int temp_index = s5m8767->buck_gpioindex;
284
285         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
286         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
287         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
288
289         return 0;
290 }
291
292 static int s5m8767_set_voltage_sel(struct regulator_dev *rdev,
293                                    unsigned selector)
294 {
295         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
296         int reg_id = rdev_get_id(rdev);
297         int old_index, index = 0;
298         u8 *buck234_vol = NULL;
299
300         switch (reg_id) {
301         case S5M8767_LDO1 ... S5M8767_LDO28:
302                 break;
303         case S5M8767_BUCK1 ... S5M8767_BUCK6:
304                 if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs)
305                         buck234_vol = &s5m8767->buck2_vol[0];
306                 else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs)
307                         buck234_vol = &s5m8767->buck3_vol[0];
308                 else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs)
309                         buck234_vol = &s5m8767->buck4_vol[0];
310                 break;
311         case S5M8767_BUCK7 ... S5M8767_BUCK8:
312                 return -EINVAL;
313         case S5M8767_BUCK9:
314                 break;
315         default:
316                 return -EINVAL;
317         }
318
319         /* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */
320         if (buck234_vol) {
321                 while (*buck234_vol != selector) {
322                         buck234_vol++;
323                         index++;
324                 }
325                 old_index = s5m8767->buck_gpioindex;
326                 s5m8767->buck_gpioindex = index;
327
328                 if (index > old_index)
329                         return s5m8767_set_high(s5m8767);
330                 else
331                         return s5m8767_set_low(s5m8767);
332         } else {
333                 return regulator_set_voltage_sel_regmap(rdev, selector);
334         }
335 }
336
337 static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
338                                              unsigned int old_sel,
339                                              unsigned int new_sel)
340 {
341         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
342         const struct sec_voltage_desc *desc;
343         int reg_id = rdev_get_id(rdev);
344
345         desc = reg_voltage_map[reg_id];
346
347         if ((old_sel < new_sel) && s5m8767->ramp_delay)
348                 return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
349                                         s5m8767->ramp_delay * 1000);
350         return 0;
351 }
352
353 static const struct regulator_ops s5m8767_ops = {
354         .list_voltage           = regulator_list_voltage_linear,
355         .is_enabled             = regulator_is_enabled_regmap,
356         .enable                 = regulator_enable_regmap,
357         .disable                = regulator_disable_regmap,
358         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
359         .set_voltage_sel        = s5m8767_set_voltage_sel,
360         .set_voltage_time_sel   = s5m8767_set_voltage_time_sel,
361 };
362
363 static const struct regulator_ops s5m8767_buck78_ops = {
364         .list_voltage           = regulator_list_voltage_linear,
365         .is_enabled             = regulator_is_enabled_regmap,
366         .enable                 = regulator_enable_regmap,
367         .disable                = regulator_disable_regmap,
368         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
369         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
370 };
371
372 #define s5m8767_regulator_desc(_name) {         \
373         .name           = #_name,               \
374         .id             = S5M8767_##_name,      \
375         .ops            = &s5m8767_ops,         \
376         .type           = REGULATOR_VOLTAGE,    \
377         .owner          = THIS_MODULE,          \
378 }
379
380 #define s5m8767_regulator_buck78_desc(_name) {  \
381         .name           = #_name,               \
382         .id             = S5M8767_##_name,      \
383         .ops            = &s5m8767_buck78_ops,  \
384         .type           = REGULATOR_VOLTAGE,    \
385         .owner          = THIS_MODULE,          \
386 }
387
388 static struct regulator_desc regulators[] = {
389         s5m8767_regulator_desc(LDO1),
390         s5m8767_regulator_desc(LDO2),
391         s5m8767_regulator_desc(LDO3),
392         s5m8767_regulator_desc(LDO4),
393         s5m8767_regulator_desc(LDO5),
394         s5m8767_regulator_desc(LDO6),
395         s5m8767_regulator_desc(LDO7),
396         s5m8767_regulator_desc(LDO8),
397         s5m8767_regulator_desc(LDO9),
398         s5m8767_regulator_desc(LDO10),
399         s5m8767_regulator_desc(LDO11),
400         s5m8767_regulator_desc(LDO12),
401         s5m8767_regulator_desc(LDO13),
402         s5m8767_regulator_desc(LDO14),
403         s5m8767_regulator_desc(LDO15),
404         s5m8767_regulator_desc(LDO16),
405         s5m8767_regulator_desc(LDO17),
406         s5m8767_regulator_desc(LDO18),
407         s5m8767_regulator_desc(LDO19),
408         s5m8767_regulator_desc(LDO20),
409         s5m8767_regulator_desc(LDO21),
410         s5m8767_regulator_desc(LDO22),
411         s5m8767_regulator_desc(LDO23),
412         s5m8767_regulator_desc(LDO24),
413         s5m8767_regulator_desc(LDO25),
414         s5m8767_regulator_desc(LDO26),
415         s5m8767_regulator_desc(LDO27),
416         s5m8767_regulator_desc(LDO28),
417         s5m8767_regulator_desc(BUCK1),
418         s5m8767_regulator_desc(BUCK2),
419         s5m8767_regulator_desc(BUCK3),
420         s5m8767_regulator_desc(BUCK4),
421         s5m8767_regulator_desc(BUCK5),
422         s5m8767_regulator_desc(BUCK6),
423         s5m8767_regulator_buck78_desc(BUCK7),
424         s5m8767_regulator_buck78_desc(BUCK8),
425         s5m8767_regulator_desc(BUCK9),
426 };
427
428 /*
429  * Enable GPIO control over BUCK9 in regulator_config for that regulator.
430  */
431 static void s5m8767_regulator_config_ext_control(struct s5m8767_info *s5m8767,
432                 struct sec_regulator_data *rdata,
433                 struct regulator_config *config)
434 {
435         int i, mode = 0;
436
437         if (rdata->id != S5M8767_BUCK9)
438                 return;
439
440         /* Check if opmode for regulator matches S5M8767_ENCTRL_USE_GPIO */
441         for (i = 0; i < s5m8767->num_regulators; i++) {
442                 const struct sec_opmode_data *opmode = &s5m8767->opmode[i];
443                 if (opmode->id == rdata->id) {
444                         mode = s5m8767_opmode_reg[rdata->id][opmode->mode];
445                         break;
446                 }
447         }
448         if (mode != S5M8767_ENCTRL_USE_GPIO) {
449                 dev_warn(s5m8767->dev,
450                                 "ext-control for %s: mismatched op_mode (%x), ignoring\n",
451                                 rdata->reg_node->name, mode);
452                 return;
453         }
454
455         if (!rdata->ext_control_gpiod) {
456                 dev_warn(s5m8767->dev,
457                                 "ext-control for %s: GPIO not valid, ignoring\n",
458                          rdata->reg_node->name);
459                 return;
460         }
461
462         config->ena_gpiod = rdata->ext_control_gpiod;
463 }
464
465 /*
466  * Turn on GPIO control over BUCK9.
467  */
468 static int s5m8767_enable_ext_control(struct s5m8767_info *s5m8767,
469                 struct regulator_dev *rdev)
470 {
471         int id = rdev_get_id(rdev);
472         int ret, reg, enable_ctrl;
473
474         if (id != S5M8767_BUCK9)
475                 return -EINVAL;
476
477         ret = s5m8767_get_register(s5m8767, id, &reg, &enable_ctrl);
478         if (ret)
479                 return ret;
480
481         return regmap_update_bits(s5m8767->iodev->regmap_pmic,
482                         reg, S5M8767_ENCTRL_MASK,
483                         S5M8767_ENCTRL_USE_GPIO << S5M8767_ENCTRL_SHIFT);
484 }
485
486
487 #ifdef CONFIG_OF
488 static int s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev *iodev,
489                         struct sec_platform_data *pdata,
490                         struct device_node *pmic_np)
491 {
492         int i, gpio;
493
494         for (i = 0; i < 3; i++) {
495                 gpio = of_get_named_gpio(pmic_np,
496                                         "s5m8767,pmic-buck-dvs-gpios", i);
497                 if (!gpio_is_valid(gpio)) {
498                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
499                         return -EINVAL;
500                 }
501                 pdata->buck_gpios[i] = gpio;
502         }
503         return 0;
504 }
505
506 static int s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev *iodev,
507                         struct sec_platform_data *pdata,
508                         struct device_node *pmic_np)
509 {
510         int i, gpio;
511
512         for (i = 0; i < 3; i++) {
513                 gpio = of_get_named_gpio(pmic_np,
514                                         "s5m8767,pmic-buck-ds-gpios", i);
515                 if (!gpio_is_valid(gpio)) {
516                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
517                         return -EINVAL;
518                 }
519                 pdata->buck_ds[i] = gpio;
520         }
521         return 0;
522 }
523
524 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
525                                         struct sec_platform_data *pdata)
526 {
527         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
528         struct device_node *pmic_np, *regulators_np, *reg_np;
529         struct sec_regulator_data *rdata;
530         struct sec_opmode_data *rmode;
531         unsigned int i, dvs_voltage_nr = 8, ret;
532
533         pmic_np = iodev->dev->of_node;
534         if (!pmic_np) {
535                 dev_err(iodev->dev, "could not find pmic sub-node\n");
536                 return -ENODEV;
537         }
538
539         regulators_np = of_get_child_by_name(pmic_np, "regulators");
540         if (!regulators_np) {
541                 dev_err(iodev->dev, "could not find regulators sub-node\n");
542                 return -EINVAL;
543         }
544
545         /* count the number of regulators to be supported in pmic */
546         pdata->num_regulators = of_get_child_count(regulators_np);
547
548         rdata = devm_kcalloc(&pdev->dev,
549                              pdata->num_regulators, sizeof(*rdata),
550                              GFP_KERNEL);
551         if (!rdata)
552                 return -ENOMEM;
553
554         rmode = devm_kcalloc(&pdev->dev,
555                              pdata->num_regulators, sizeof(*rmode),
556                              GFP_KERNEL);
557         if (!rmode)
558                 return -ENOMEM;
559
560         pdata->regulators = rdata;
561         pdata->opmode = rmode;
562         for_each_child_of_node(regulators_np, reg_np) {
563                 for (i = 0; i < ARRAY_SIZE(regulators); i++)
564                         if (!of_node_cmp(reg_np->name, regulators[i].name))
565                                 break;
566
567                 if (i == ARRAY_SIZE(regulators)) {
568                         dev_warn(iodev->dev,
569                         "don't know how to configure regulator %s\n",
570                         reg_np->name);
571                         continue;
572                 }
573
574                 rdata->ext_control_gpiod = devm_gpiod_get_from_of_node(&pdev->dev,
575                                                                        reg_np,
576                                                                        "s5m8767,pmic-ext-control-gpios",
577                                                                        0,
578                                                                        GPIOD_OUT_HIGH,
579                                                                        "s5m8767");
580                 if (IS_ERR(rdata->ext_control_gpiod))
581                         return PTR_ERR(rdata->ext_control_gpiod);
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 %pOF\n",
594                                 reg_np);
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_gpiod = NULL;
958                 if (pdata->regulators[i].ext_control_gpiod)
959                         s5m8767_regulator_config_ext_control(s5m8767,
960                                         &pdata->regulators[i], &config);
961
962                 rdev = devm_regulator_register(&pdev->dev, &regulators[id],
963                                                   &config);
964                 if (IS_ERR(rdev)) {
965                         ret = PTR_ERR(rdev);
966                         dev_err(s5m8767->dev, "regulator init failed for %d\n",
967                                         id);
968                         return ret;
969                 }
970
971                 if (pdata->regulators[i].ext_control_gpiod) {
972                         ret = s5m8767_enable_ext_control(s5m8767, rdev);
973                         if (ret < 0) {
974                                 dev_err(s5m8767->dev,
975                                                 "failed to enable gpio control over %s: %d\n",
976                                                 rdev->desc->name, ret);
977                                 return ret;
978                         }
979                 }
980         }
981
982         return 0;
983 }
984
985 static const struct platform_device_id s5m8767_pmic_id[] = {
986         { "s5m8767-pmic", 0},
987         { },
988 };
989 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
990
991 static struct platform_driver s5m8767_pmic_driver = {
992         .driver = {
993                 .name = "s5m8767-pmic",
994         },
995         .probe = s5m8767_pmic_probe,
996         .id_table = s5m8767_pmic_id,
997 };
998
999 static int __init s5m8767_pmic_init(void)
1000 {
1001         return platform_driver_register(&s5m8767_pmic_driver);
1002 }
1003 subsys_initcall(s5m8767_pmic_init);
1004
1005 static void __exit s5m8767_pmic_exit(void)
1006 {
1007         platform_driver_unregister(&s5m8767_pmic_driver);
1008 }
1009 module_exit(s5m8767_pmic_exit);
1010
1011 /* Module information */
1012 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
1013 MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
1014 MODULE_LICENSE("GPL");