GNU Linux-libre 5.10.219-gnu1
[releases.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 const 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
343         if ((old_sel < new_sel) && s5m8767->ramp_delay)
344                 return DIV_ROUND_UP(rdev->desc->uV_step * (new_sel - old_sel),
345                                         s5m8767->ramp_delay * 1000);
346         return 0;
347 }
348
349 static const struct regulator_ops s5m8767_ops = {
350         .list_voltage           = regulator_list_voltage_linear,
351         .is_enabled             = regulator_is_enabled_regmap,
352         .enable                 = regulator_enable_regmap,
353         .disable                = regulator_disable_regmap,
354         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
355         .set_voltage_sel        = s5m8767_set_voltage_sel,
356         .set_voltage_time_sel   = s5m8767_set_voltage_time_sel,
357 };
358
359 static const struct regulator_ops s5m8767_buck78_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        = regulator_set_voltage_sel_regmap,
366 };
367
368 #define s5m8767_regulator_desc(_name) {         \
369         .name           = #_name,               \
370         .id             = S5M8767_##_name,      \
371         .ops            = &s5m8767_ops,         \
372         .type           = REGULATOR_VOLTAGE,    \
373         .owner          = THIS_MODULE,          \
374 }
375
376 #define s5m8767_regulator_buck78_desc(_name) {  \
377         .name           = #_name,               \
378         .id             = S5M8767_##_name,      \
379         .ops            = &s5m8767_buck78_ops,  \
380         .type           = REGULATOR_VOLTAGE,    \
381         .owner          = THIS_MODULE,          \
382 }
383
384 static struct regulator_desc regulators[] = {
385         s5m8767_regulator_desc(LDO1),
386         s5m8767_regulator_desc(LDO2),
387         s5m8767_regulator_desc(LDO3),
388         s5m8767_regulator_desc(LDO4),
389         s5m8767_regulator_desc(LDO5),
390         s5m8767_regulator_desc(LDO6),
391         s5m8767_regulator_desc(LDO7),
392         s5m8767_regulator_desc(LDO8),
393         s5m8767_regulator_desc(LDO9),
394         s5m8767_regulator_desc(LDO10),
395         s5m8767_regulator_desc(LDO11),
396         s5m8767_regulator_desc(LDO12),
397         s5m8767_regulator_desc(LDO13),
398         s5m8767_regulator_desc(LDO14),
399         s5m8767_regulator_desc(LDO15),
400         s5m8767_regulator_desc(LDO16),
401         s5m8767_regulator_desc(LDO17),
402         s5m8767_regulator_desc(LDO18),
403         s5m8767_regulator_desc(LDO19),
404         s5m8767_regulator_desc(LDO20),
405         s5m8767_regulator_desc(LDO21),
406         s5m8767_regulator_desc(LDO22),
407         s5m8767_regulator_desc(LDO23),
408         s5m8767_regulator_desc(LDO24),
409         s5m8767_regulator_desc(LDO25),
410         s5m8767_regulator_desc(LDO26),
411         s5m8767_regulator_desc(LDO27),
412         s5m8767_regulator_desc(LDO28),
413         s5m8767_regulator_desc(BUCK1),
414         s5m8767_regulator_desc(BUCK2),
415         s5m8767_regulator_desc(BUCK3),
416         s5m8767_regulator_desc(BUCK4),
417         s5m8767_regulator_desc(BUCK5),
418         s5m8767_regulator_desc(BUCK6),
419         s5m8767_regulator_buck78_desc(BUCK7),
420         s5m8767_regulator_buck78_desc(BUCK8),
421         s5m8767_regulator_desc(BUCK9),
422 };
423
424 /*
425  * Enable GPIO control over BUCK9 in regulator_config for that regulator.
426  */
427 static void s5m8767_regulator_config_ext_control(struct s5m8767_info *s5m8767,
428                 struct sec_regulator_data *rdata,
429                 struct regulator_config *config)
430 {
431         int i, mode = 0;
432
433         if (rdata->id != S5M8767_BUCK9)
434                 return;
435
436         /* Check if opmode for regulator matches S5M8767_ENCTRL_USE_GPIO */
437         for (i = 0; i < s5m8767->num_regulators; i++) {
438                 const struct sec_opmode_data *opmode = &s5m8767->opmode[i];
439                 if (opmode->id == rdata->id) {
440                         mode = s5m8767_opmode_reg[rdata->id][opmode->mode];
441                         break;
442                 }
443         }
444         if (mode != S5M8767_ENCTRL_USE_GPIO) {
445                 dev_warn(s5m8767->dev,
446                                 "ext-control for %pOFn: mismatched op_mode (%x), ignoring\n",
447                                 rdata->reg_node, mode);
448                 return;
449         }
450
451         if (!rdata->ext_control_gpiod) {
452                 dev_warn(s5m8767->dev,
453                                 "ext-control for %pOFn: GPIO not valid, ignoring\n",
454                          rdata->reg_node);
455                 return;
456         }
457
458         config->ena_gpiod = rdata->ext_control_gpiod;
459 }
460
461 /*
462  * Turn on GPIO control over BUCK9.
463  */
464 static int s5m8767_enable_ext_control(struct s5m8767_info *s5m8767,
465                 struct regulator_dev *rdev)
466 {
467         int id = rdev_get_id(rdev);
468         int ret, reg, enable_ctrl;
469
470         if (id != S5M8767_BUCK9)
471                 return -EINVAL;
472
473         ret = s5m8767_get_register(s5m8767, id, &reg, &enable_ctrl);
474         if (ret)
475                 return ret;
476
477         return regmap_update_bits(s5m8767->iodev->regmap_pmic,
478                         reg, S5M8767_ENCTRL_MASK,
479                         S5M8767_ENCTRL_USE_GPIO << S5M8767_ENCTRL_SHIFT);
480 }
481
482
483 #ifdef CONFIG_OF
484 static int s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev *iodev,
485                         struct sec_platform_data *pdata,
486                         struct device_node *pmic_np)
487 {
488         int i, gpio;
489
490         for (i = 0; i < 3; i++) {
491                 gpio = of_get_named_gpio(pmic_np,
492                                         "s5m8767,pmic-buck-dvs-gpios", i);
493                 if (!gpio_is_valid(gpio)) {
494                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
495                         return -EINVAL;
496                 }
497                 pdata->buck_gpios[i] = gpio;
498         }
499         return 0;
500 }
501
502 static int s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev *iodev,
503                         struct sec_platform_data *pdata,
504                         struct device_node *pmic_np)
505 {
506         int i, gpio;
507
508         for (i = 0; i < 3; i++) {
509                 gpio = of_get_named_gpio(pmic_np,
510                                         "s5m8767,pmic-buck-ds-gpios", i);
511                 if (!gpio_is_valid(gpio)) {
512                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
513                         return -EINVAL;
514                 }
515                 pdata->buck_ds[i] = gpio;
516         }
517         return 0;
518 }
519
520 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
521                                         struct sec_platform_data *pdata)
522 {
523         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
524         struct device_node *pmic_np, *regulators_np, *reg_np;
525         struct sec_regulator_data *rdata;
526         struct sec_opmode_data *rmode;
527         unsigned int i, dvs_voltage_nr = 8, ret;
528
529         pmic_np = iodev->dev->of_node;
530         if (!pmic_np) {
531                 dev_err(iodev->dev, "could not find pmic sub-node\n");
532                 return -ENODEV;
533         }
534
535         regulators_np = of_get_child_by_name(pmic_np, "regulators");
536         if (!regulators_np) {
537                 dev_err(iodev->dev, "could not find regulators sub-node\n");
538                 return -EINVAL;
539         }
540
541         /* count the number of regulators to be supported in pmic */
542         pdata->num_regulators = of_get_child_count(regulators_np);
543
544         rdata = devm_kcalloc(&pdev->dev,
545                              pdata->num_regulators, sizeof(*rdata),
546                              GFP_KERNEL);
547         if (!rdata) {
548                 of_node_put(regulators_np);
549                 return -ENOMEM;
550         }
551
552         rmode = devm_kcalloc(&pdev->dev,
553                              pdata->num_regulators, sizeof(*rmode),
554                              GFP_KERNEL);
555         if (!rmode) {
556                 of_node_put(regulators_np);
557                 return -ENOMEM;
558         }
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_name_eq(reg_np, 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 %pOFn\n",
570                         reg_np);
571                         continue;
572                 }
573
574                 rdata->ext_control_gpiod = devm_fwnode_gpiod_get(
575                         &pdev->dev,
576                         of_fwnode_handle(reg_np),
577                         "s5m8767,pmic-ext-control",
578                         GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE,
579                         "s5m8767");
580                 if (PTR_ERR(rdata->ext_control_gpiod) == -ENOENT) {
581                         rdata->ext_control_gpiod = NULL;
582                 } else if (IS_ERR(rdata->ext_control_gpiod)) {
583                         of_node_put(reg_np);
584                         of_node_put(regulators_np);
585                         return PTR_ERR(rdata->ext_control_gpiod);
586                 }
587
588                 rdata->id = i;
589                 rdata->initdata = of_get_regulator_init_data(
590                                                 &pdev->dev, reg_np,
591                                                 &regulators[i]);
592                 rdata->reg_node = reg_np;
593                 rdata++;
594                 rmode->id = i;
595                 if (of_property_read_u32(reg_np, "op_mode",
596                                 &rmode->mode)) {
597                         dev_warn(iodev->dev,
598                                 "no op_mode property at %pOF\n",
599                                 reg_np);
600
601                         rmode->mode = S5M8767_OPMODE_NORMAL_MODE;
602                 }
603                 rmode++;
604         }
605
606         of_node_put(regulators_np);
607
608         if (of_get_property(pmic_np, "s5m8767,pmic-buck2-uses-gpio-dvs", NULL)) {
609                 pdata->buck2_gpiodvs = true;
610
611                 if (of_property_read_u32_array(pmic_np,
612                                 "s5m8767,pmic-buck2-dvs-voltage",
613                                 pdata->buck2_voltage, dvs_voltage_nr)) {
614                         dev_err(iodev->dev, "buck2 voltages not specified\n");
615                         return -EINVAL;
616                 }
617         }
618
619         if (of_get_property(pmic_np, "s5m8767,pmic-buck3-uses-gpio-dvs", NULL)) {
620                 pdata->buck3_gpiodvs = true;
621
622                 if (of_property_read_u32_array(pmic_np,
623                                 "s5m8767,pmic-buck3-dvs-voltage",
624                                 pdata->buck3_voltage, dvs_voltage_nr)) {
625                         dev_err(iodev->dev, "buck3 voltages not specified\n");
626                         return -EINVAL;
627                 }
628         }
629
630         if (of_get_property(pmic_np, "s5m8767,pmic-buck4-uses-gpio-dvs", NULL)) {
631                 pdata->buck4_gpiodvs = true;
632
633                 if (of_property_read_u32_array(pmic_np,
634                                 "s5m8767,pmic-buck4-dvs-voltage",
635                                 pdata->buck4_voltage, dvs_voltage_nr)) {
636                         dev_err(iodev->dev, "buck4 voltages not specified\n");
637                         return -EINVAL;
638                 }
639         }
640
641         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
642                                                 pdata->buck4_gpiodvs) {
643                 ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
644                 if (ret)
645                         return -EINVAL;
646
647                 if (of_property_read_u32(pmic_np,
648                                 "s5m8767,pmic-buck-default-dvs-idx",
649                                 &pdata->buck_default_idx)) {
650                         pdata->buck_default_idx = 0;
651                 } else {
652                         if (pdata->buck_default_idx >= 8) {
653                                 pdata->buck_default_idx = 0;
654                                 dev_info(iodev->dev,
655                                 "invalid value for default dvs index, use 0\n");
656                         }
657                 }
658         }
659
660         ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np);
661         if (ret)
662                 return -EINVAL;
663
664         if (of_get_property(pmic_np, "s5m8767,pmic-buck2-ramp-enable", NULL))
665                 pdata->buck2_ramp_enable = true;
666
667         if (of_get_property(pmic_np, "s5m8767,pmic-buck3-ramp-enable", NULL))
668                 pdata->buck3_ramp_enable = true;
669
670         if (of_get_property(pmic_np, "s5m8767,pmic-buck4-ramp-enable", NULL))
671                 pdata->buck4_ramp_enable = true;
672
673         if (pdata->buck2_ramp_enable || pdata->buck3_ramp_enable
674                         || pdata->buck4_ramp_enable) {
675                 if (of_property_read_u32(pmic_np, "s5m8767,pmic-buck-ramp-delay",
676                                 &pdata->buck_ramp_delay))
677                         pdata->buck_ramp_delay = 0;
678         }
679
680         return 0;
681 }
682 #else
683 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
684                                         struct sec_platform_data *pdata)
685 {
686         return 0;
687 }
688 #endif /* CONFIG_OF */
689
690 static int s5m8767_pmic_probe(struct platform_device *pdev)
691 {
692         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
693         struct sec_platform_data *pdata = iodev->pdata;
694         struct regulator_config config = { };
695         struct s5m8767_info *s5m8767;
696         int i, ret, buck_init;
697
698         if (!pdata) {
699                 dev_err(pdev->dev.parent, "Platform data not supplied\n");
700                 return -ENODEV;
701         }
702
703         if (iodev->dev->of_node) {
704                 ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata);
705                 if (ret)
706                         return ret;
707         }
708
709         if (pdata->buck2_gpiodvs) {
710                 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
711                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
712                         return -EINVAL;
713                 }
714         }
715
716         if (pdata->buck3_gpiodvs) {
717                 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
718                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
719                         return -EINVAL;
720                 }
721         }
722
723         if (pdata->buck4_gpiodvs) {
724                 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
725                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
726                         return -EINVAL;
727                 }
728         }
729
730         s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
731                                 GFP_KERNEL);
732         if (!s5m8767)
733                 return -ENOMEM;
734
735         s5m8767->dev = &pdev->dev;
736         s5m8767->iodev = iodev;
737         s5m8767->num_regulators = pdata->num_regulators;
738         platform_set_drvdata(pdev, s5m8767);
739
740         s5m8767->buck_gpioindex = pdata->buck_default_idx;
741         s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
742         s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
743         s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
744         s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
745         s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
746         s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
747         s5m8767->buck_ds[0] = pdata->buck_ds[0];
748         s5m8767->buck_ds[1] = pdata->buck_ds[1];
749         s5m8767->buck_ds[2] = pdata->buck_ds[2];
750
751         s5m8767->ramp_delay = pdata->buck_ramp_delay;
752         s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
753         s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
754         s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
755         s5m8767->opmode = pdata->opmode;
756
757         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
758                                                    pdata->buck2_init);
759
760         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK2DVS2,
761                         buck_init);
762
763         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
764                                                    pdata->buck3_init);
765
766         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK3DVS2,
767                         buck_init);
768
769         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
770                                                    pdata->buck4_init);
771
772         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK4DVS2,
773                         buck_init);
774
775         for (i = 0; i < 8; i++) {
776                 if (s5m8767->buck2_gpiodvs) {
777                         s5m8767->buck2_vol[i] =
778                                 s5m8767_convert_voltage_to_sel(
779                                                 &buck_voltage_val2,
780                                                 pdata->buck2_voltage[i]);
781                 }
782
783                 if (s5m8767->buck3_gpiodvs) {
784                         s5m8767->buck3_vol[i] =
785                                 s5m8767_convert_voltage_to_sel(
786                                                 &buck_voltage_val2,
787                                                 pdata->buck3_voltage[i]);
788                 }
789
790                 if (s5m8767->buck4_gpiodvs) {
791                         s5m8767->buck4_vol[i] =
792                                 s5m8767_convert_voltage_to_sel(
793                                                 &buck_voltage_val2,
794                                                 pdata->buck4_voltage[i]);
795                 }
796         }
797
798         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
799                                                 pdata->buck4_gpiodvs) {
800
801                 if (!gpio_is_valid(pdata->buck_gpios[0]) ||
802                         !gpio_is_valid(pdata->buck_gpios[1]) ||
803                         !gpio_is_valid(pdata->buck_gpios[2])) {
804                         dev_err(&pdev->dev, "GPIO NOT VALID\n");
805                         return -EINVAL;
806                 }
807
808                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
809                                         "S5M8767 SET1");
810                 if (ret)
811                         return ret;
812
813                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
814                                         "S5M8767 SET2");
815                 if (ret)
816                         return ret;
817
818                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
819                                         "S5M8767 SET3");
820                 if (ret)
821                         return ret;
822
823                 /* SET1 GPIO */
824                 gpio_direction_output(pdata->buck_gpios[0],
825                                 (s5m8767->buck_gpioindex >> 2) & 0x1);
826                 /* SET2 GPIO */
827                 gpio_direction_output(pdata->buck_gpios[1],
828                                 (s5m8767->buck_gpioindex >> 1) & 0x1);
829                 /* SET3 GPIO */
830                 gpio_direction_output(pdata->buck_gpios[2],
831                                 (s5m8767->buck_gpioindex >> 0) & 0x1);
832         }
833
834         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
835         if (ret)
836                 return ret;
837
838         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
839         if (ret)
840                 return ret;
841
842         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
843         if (ret)
844                 return ret;
845
846         /* DS2 GPIO */
847         gpio_direction_output(pdata->buck_ds[0], 0x0);
848         /* DS3 GPIO */
849         gpio_direction_output(pdata->buck_ds[1], 0x0);
850         /* DS4 GPIO */
851         gpio_direction_output(pdata->buck_ds[2], 0x0);
852
853         regmap_update_bits(s5m8767->iodev->regmap_pmic,
854                            S5M8767_REG_BUCK2CTRL, 1 << 1,
855                            (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1));
856         regmap_update_bits(s5m8767->iodev->regmap_pmic,
857                            S5M8767_REG_BUCK3CTRL, 1 << 1,
858                            (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1));
859         regmap_update_bits(s5m8767->iodev->regmap_pmic,
860                            S5M8767_REG_BUCK4CTRL, 1 << 1,
861                            (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1));
862
863         /* Initialize GPIO DVS registers */
864         for (i = 0; i < 8; i++) {
865                 if (s5m8767->buck2_gpiodvs) {
866                         regmap_write(s5m8767->iodev->regmap_pmic,
867                                         S5M8767_REG_BUCK2DVS1 + i,
868                                         s5m8767->buck2_vol[i]);
869                 }
870
871                 if (s5m8767->buck3_gpiodvs) {
872                         regmap_write(s5m8767->iodev->regmap_pmic,
873                                         S5M8767_REG_BUCK3DVS1 + i,
874                                         s5m8767->buck3_vol[i]);
875                 }
876
877                 if (s5m8767->buck4_gpiodvs) {
878                         regmap_write(s5m8767->iodev->regmap_pmic,
879                                         S5M8767_REG_BUCK4DVS1 + i,
880                                         s5m8767->buck4_vol[i]);
881                 }
882         }
883
884         if (s5m8767->buck2_ramp)
885                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
886                                 S5M8767_REG_DVSRAMP, 0x08, 0x08);
887
888         if (s5m8767->buck3_ramp)
889                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
890                                 S5M8767_REG_DVSRAMP, 0x04, 0x04);
891
892         if (s5m8767->buck4_ramp)
893                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
894                                 S5M8767_REG_DVSRAMP, 0x02, 0x02);
895
896         if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
897                 || s5m8767->buck4_ramp) {
898                 unsigned int val;
899                 switch (s5m8767->ramp_delay) {
900                 case 5:
901                         val = S5M8767_DVS_BUCK_RAMP_5;
902                         break;
903                 case 10:
904                         val = S5M8767_DVS_BUCK_RAMP_10;
905                         break;
906                 case 25:
907                         val = S5M8767_DVS_BUCK_RAMP_25;
908                         break;
909                 case 50:
910                         val = S5M8767_DVS_BUCK_RAMP_50;
911                         break;
912                 case 100:
913                         val = S5M8767_DVS_BUCK_RAMP_100;
914                         break;
915                 default:
916                         val = S5M8767_DVS_BUCK_RAMP_10;
917                 }
918                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
919                                         S5M8767_REG_DVSRAMP,
920                                         S5M8767_DVS_BUCK_RAMP_MASK,
921                                         val << S5M8767_DVS_BUCK_RAMP_SHIFT);
922         }
923
924         for (i = 0; i < pdata->num_regulators; i++) {
925                 const struct sec_voltage_desc *desc;
926                 unsigned int id = pdata->regulators[i].id;
927                 int enable_reg, enable_val;
928                 struct regulator_dev *rdev;
929
930                 BUILD_BUG_ON(ARRAY_SIZE(regulators) != ARRAY_SIZE(reg_voltage_map));
931                 if (WARN_ON_ONCE(id >= ARRAY_SIZE(regulators)))
932                         continue;
933
934                 desc = reg_voltage_map[id];
935                 if (desc) {
936                         regulators[id].n_voltages =
937                                 (desc->max - desc->min) / desc->step + 1;
938                         regulators[id].min_uV = desc->min;
939                         regulators[id].uV_step = desc->step;
940                         regulators[id].vsel_reg =
941                                 s5m8767_get_vsel_reg(id, s5m8767);
942                         if (id < S5M8767_BUCK1)
943                                 regulators[id].vsel_mask = 0x3f;
944                         else
945                                 regulators[id].vsel_mask = 0xff;
946
947                         ret = s5m8767_get_register(s5m8767, id, &enable_reg,
948                                              &enable_val);
949                         if (ret) {
950                                 dev_err(s5m8767->dev, "error reading registers\n");
951                                 return ret;
952                         }
953                         regulators[id].enable_reg = enable_reg;
954                         regulators[id].enable_mask = S5M8767_ENCTRL_MASK;
955                         regulators[id].enable_val = enable_val;
956                 }
957
958                 config.dev = s5m8767->dev;
959                 config.init_data = pdata->regulators[i].initdata;
960                 config.driver_data = s5m8767;
961                 config.regmap = iodev->regmap_pmic;
962                 config.of_node = pdata->regulators[i].reg_node;
963                 config.ena_gpiod = NULL;
964                 if (pdata->regulators[i].ext_control_gpiod) {
965                         /* Assigns config.ena_gpiod */
966                         s5m8767_regulator_config_ext_control(s5m8767,
967                                         &pdata->regulators[i], &config);
968
969                         /*
970                          * Hand the GPIO descriptor management over to the
971                          * regulator core, remove it from devres management.
972                          */
973                         devm_gpiod_unhinge(s5m8767->dev, config.ena_gpiod);
974                 }
975                 rdev = devm_regulator_register(&pdev->dev, &regulators[id],
976                                                   &config);
977                 if (IS_ERR(rdev)) {
978                         ret = PTR_ERR(rdev);
979                         dev_err(s5m8767->dev, "regulator init failed for %d\n",
980                                         id);
981                         return ret;
982                 }
983
984                 if (pdata->regulators[i].ext_control_gpiod) {
985                         ret = s5m8767_enable_ext_control(s5m8767, rdev);
986                         if (ret < 0) {
987                                 dev_err(s5m8767->dev,
988                                                 "failed to enable gpio control over %s: %d\n",
989                                                 rdev->desc->name, ret);
990                                 return ret;
991                         }
992                 }
993         }
994
995         return 0;
996 }
997
998 static const struct platform_device_id s5m8767_pmic_id[] = {
999         { "s5m8767-pmic", 0},
1000         { },
1001 };
1002 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
1003
1004 static struct platform_driver s5m8767_pmic_driver = {
1005         .driver = {
1006                 .name = "s5m8767-pmic",
1007         },
1008         .probe = s5m8767_pmic_probe,
1009         .id_table = s5m8767_pmic_id,
1010 };
1011 module_platform_driver(s5m8767_pmic_driver);
1012
1013 /* Module information */
1014 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
1015 MODULE_DESCRIPTION("Samsung S5M8767 Regulator Driver");
1016 MODULE_LICENSE("GPL");