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Linux 4.18.10
[linux/fpc-iii.git] / drivers / regulator / s5m8767.c
blob0cbc980753c2f0fcb6151a67d60457e2daeadb93
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/gpio/consumer.h>
17 #include <linux/module.h>
18 #include <linux/platform_device.h>
19 #include <linux/regulator/driver.h>
20 #include <linux/regulator/machine.h>
21 #include <linux/mfd/samsung/core.h>
22 #include <linux/mfd/samsung/s5m8767.h>
23 #include <linux/regulator/of_regulator.h>
24 #include <linux/regmap.h>
25
26 #define S5M8767_OPMODE_NORMAL_MODE 0x1
27
28 struct s5m8767_info {
29 struct device *dev;
30 struct sec_pmic_dev *iodev;
31 int num_regulators;
32 struct sec_opmode_data *opmode;
33
34 int ramp_delay;
35 bool buck2_ramp;
36 bool buck3_ramp;
37 bool buck4_ramp;
38
39 bool buck2_gpiodvs;
40 bool buck3_gpiodvs;
41 bool buck4_gpiodvs;
42 u8 buck2_vol[8];
43 u8 buck3_vol[8];
44 u8 buck4_vol[8];
45 int buck_gpios[3];
46 int buck_ds[3];
47 int buck_gpioindex;
48 };
49
50 struct sec_voltage_desc {
51 int max;
52 int min;
53 int step;
54 };
55
56 static const struct sec_voltage_desc buck_voltage_val1 = {
57 .max = 2225000,
58 .min = 650000,
59 .step = 6250,
60 };
61
62 static const struct sec_voltage_desc buck_voltage_val2 = {
63 .max = 1600000,
64 .min = 600000,
65 .step = 6250,
66 };
67
68 static const struct sec_voltage_desc buck_voltage_val3 = {
69 .max = 3000000,
70 .min = 750000,
71 .step = 12500,
72 };
73
74 static const struct sec_voltage_desc ldo_voltage_val1 = {
75 .max = 3950000,
76 .min = 800000,
77 .step = 50000,
78 };
79
80 static const struct sec_voltage_desc ldo_voltage_val2 = {
81 .max = 2375000,
82 .min = 800000,
83 .step = 25000,
84 };
85
86 static const struct sec_voltage_desc *reg_voltage_map[] = {
87 [S5M8767_LDO1] = &ldo_voltage_val2,
88 [S5M8767_LDO2] = &ldo_voltage_val2,
89 [S5M8767_LDO3] = &ldo_voltage_val1,
90 [S5M8767_LDO4] = &ldo_voltage_val1,
91 [S5M8767_LDO5] = &ldo_voltage_val1,
92 [S5M8767_LDO6] = &ldo_voltage_val2,
93 [S5M8767_LDO7] = &ldo_voltage_val2,
94 [S5M8767_LDO8] = &ldo_voltage_val2,
95 [S5M8767_LDO9] = &ldo_voltage_val1,
96 [S5M8767_LDO10] = &ldo_voltage_val1,
97 [S5M8767_LDO11] = &ldo_voltage_val1,
98 [S5M8767_LDO12] = &ldo_voltage_val1,
99 [S5M8767_LDO13] = &ldo_voltage_val1,
100 [S5M8767_LDO14] = &ldo_voltage_val1,
101 [S5M8767_LDO15] = &ldo_voltage_val2,
102 [S5M8767_LDO16] = &ldo_voltage_val1,
103 [S5M8767_LDO17] = &ldo_voltage_val1,
104 [S5M8767_LDO18] = &ldo_voltage_val1,
105 [S5M8767_LDO19] = &ldo_voltage_val1,
106 [S5M8767_LDO20] = &ldo_voltage_val1,
107 [S5M8767_LDO21] = &ldo_voltage_val1,
108 [S5M8767_LDO22] = &ldo_voltage_val1,
109 [S5M8767_LDO23] = &ldo_voltage_val1,
110 [S5M8767_LDO24] = &ldo_voltage_val1,
111 [S5M8767_LDO25] = &ldo_voltage_val1,
112 [S5M8767_LDO26] = &ldo_voltage_val1,
113 [S5M8767_LDO27] = &ldo_voltage_val1,
114 [S5M8767_LDO28] = &ldo_voltage_val1,
115 [S5M8767_BUCK1] = &buck_voltage_val1,
116 [S5M8767_BUCK2] = &buck_voltage_val2,
117 [S5M8767_BUCK3] = &buck_voltage_val2,
118 [S5M8767_BUCK4] = &buck_voltage_val2,
119 [S5M8767_BUCK5] = &buck_voltage_val1,
120 [S5M8767_BUCK6] = &buck_voltage_val1,
121 [S5M8767_BUCK7] = &buck_voltage_val3,
122 [S5M8767_BUCK8] = &buck_voltage_val3,
123 [S5M8767_BUCK9] = &buck_voltage_val3,
124 };
125
126 static unsigned int s5m8767_opmode_reg[][4] = {
127 /* {OFF, ON, LOWPOWER, SUSPEND} */
128 /* LDO1 ... LDO28 */
129 {0x0, 0x3, 0x2, 0x1}, /* LDO1 */
130 {0x0, 0x3, 0x2, 0x1},
131 {0x0, 0x3, 0x2, 0x1},
132 {0x0, 0x0, 0x0, 0x0},
133 {0x0, 0x3, 0x2, 0x1}, /* LDO5 */
134 {0x0, 0x3, 0x2, 0x1},
135 {0x0, 0x3, 0x2, 0x1},
136 {0x0, 0x3, 0x2, 0x1},
137 {0x0, 0x3, 0x2, 0x1},
138 {0x0, 0x3, 0x2, 0x1}, /* LDO10 */
139 {0x0, 0x3, 0x2, 0x1},
140 {0x0, 0x3, 0x2, 0x1},
141 {0x0, 0x3, 0x2, 0x1},
142 {0x0, 0x3, 0x2, 0x1},
143 {0x0, 0x3, 0x2, 0x1}, /* LDO15 */
144 {0x0, 0x3, 0x2, 0x1},
145 {0x0, 0x3, 0x2, 0x1},
146 {0x0, 0x0, 0x0, 0x0},
147 {0x0, 0x3, 0x2, 0x1},
148 {0x0, 0x3, 0x2, 0x1}, /* LDO20 */
149 {0x0, 0x3, 0x2, 0x1},
150 {0x0, 0x3, 0x2, 0x1},
151 {0x0, 0x0, 0x0, 0x0},
152 {0x0, 0x3, 0x2, 0x1},
153 {0x0, 0x3, 0x2, 0x1}, /* LDO25 */
154 {0x0, 0x3, 0x2, 0x1},
155 {0x0, 0x3, 0x2, 0x1},
156 {0x0, 0x3, 0x2, 0x1}, /* LDO28 */
157
158 /* BUCK1 ... BUCK9 */
159 {0x0, 0x3, 0x1, 0x1}, /* BUCK1 */
160 {0x0, 0x3, 0x1, 0x1},
161 {0x0, 0x3, 0x1, 0x1},
162 {0x0, 0x3, 0x1, 0x1},
163 {0x0, 0x3, 0x2, 0x1}, /* BUCK5 */
164 {0x0, 0x3, 0x1, 0x1},
165 {0x0, 0x3, 0x1, 0x1},
166 {0x0, 0x3, 0x1, 0x1},
167 {0x0, 0x3, 0x1, 0x1}, /* BUCK9 */
168 };
169
170 static int s5m8767_get_register(struct s5m8767_info *s5m8767, int reg_id,
171 int *reg, int *enable_ctrl)
172 {
173 int i;
174 unsigned int mode;
175
176 switch (reg_id) {
177 case S5M8767_LDO1 ... S5M8767_LDO2:
178 *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
179 break;
180 case S5M8767_LDO3 ... S5M8767_LDO28:
181 *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
182 break;
183 case S5M8767_BUCK1:
184 *reg = S5M8767_REG_BUCK1CTRL1;
185 break;
186 case S5M8767_BUCK2 ... S5M8767_BUCK4:
187 *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9;
188 break;
189 case S5M8767_BUCK5:
190 *reg = S5M8767_REG_BUCK5CTRL1;
191 break;
192 case S5M8767_BUCK6 ... S5M8767_BUCK9:
193 *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2;
194 break;
195 default:
196 return -EINVAL;
197 }
198
199 for (i = 0; i < s5m8767->num_regulators; i++) {
200 if (s5m8767->opmode[i].id == reg_id) {
201 mode = s5m8767->opmode[i].mode;
202 break;
203 }
204 }
205
206 if (i >= s5m8767->num_regulators)
207 return -EINVAL;
208
209 *enable_ctrl = s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT;
210
211 return 0;
212 }
213
214 static int s5m8767_get_vsel_reg(int reg_id, struct s5m8767_info *s5m8767)
215 {
216 int reg;
217
218 switch (reg_id) {
219 case S5M8767_LDO1 ... S5M8767_LDO2:
220 reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
221 break;
222 case S5M8767_LDO3 ... S5M8767_LDO28:
223 reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
224 break;
225 case S5M8767_BUCK1:
226 reg = S5M8767_REG_BUCK1CTRL2;
227 break;
228 case S5M8767_BUCK2:
229 reg = S5M8767_REG_BUCK2DVS1;
230 if (s5m8767->buck2_gpiodvs)
231 reg += s5m8767->buck_gpioindex;
232 break;
233 case S5M8767_BUCK3:
234 reg = S5M8767_REG_BUCK3DVS1;
235 if (s5m8767->buck3_gpiodvs)
236 reg += s5m8767->buck_gpioindex;
237 break;
238 case S5M8767_BUCK4:
239 reg = S5M8767_REG_BUCK4DVS1;
240 if (s5m8767->buck4_gpiodvs)
241 reg += s5m8767->buck_gpioindex;
242 break;
243 case S5M8767_BUCK5:
244 reg = S5M8767_REG_BUCK5CTRL2;
245 break;
246 case S5M8767_BUCK6 ... S5M8767_BUCK9:
247 reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
248 break;
249 default:
250 return -EINVAL;
251 }
252
253 return reg;
254 }
255
256 static int s5m8767_convert_voltage_to_sel(const struct sec_voltage_desc *desc,
257 int min_vol)
258 {
259 int selector = 0;
260
261 if (desc == NULL)
262 return -EINVAL;
263
264 if (min_vol > desc->max)
265 return -EINVAL;
266
267 if (min_vol < desc->min)
268 min_vol = desc->min;
269
270 selector = DIV_ROUND_UP(min_vol - desc->min, desc->step);
271
272 if (desc->min + desc->step * selector > desc->max)
273 return -EINVAL;
274
275 return selector;
276 }
277
278 static inline int s5m8767_set_high(struct s5m8767_info *s5m8767)
279 {
280 int temp_index = s5m8767->buck_gpioindex;
281
282 gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
283 gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
284 gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
285
286 return 0;
287 }
288
289 static inline int s5m8767_set_low(struct s5m8767_info *s5m8767)
290 {
291 int temp_index = s5m8767->buck_gpioindex;
292
293 gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
294 gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
295 gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
296
297 return 0;
298 }
299
300 static int s5m8767_set_voltage_sel(struct regulator_dev *rdev,
301 unsigned selector)
302 {
303 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
304 int reg_id = rdev_get_id(rdev);
305 int old_index, index = 0;
306 u8 *buck234_vol = NULL;
307
308 switch (reg_id) {
309 case S5M8767_LDO1 ... S5M8767_LDO28:
310 break;
311 case S5M8767_BUCK1 ... S5M8767_BUCK6:
312 if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs)
313 buck234_vol = &s5m8767->buck2_vol[0];
314 else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs)
315 buck234_vol = &s5m8767->buck3_vol[0];
316 else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs)
317 buck234_vol = &s5m8767->buck4_vol[0];
318 break;
319 case S5M8767_BUCK7 ... S5M8767_BUCK8:
320 return -EINVAL;
321 case S5M8767_BUCK9:
322 break;
323 default:
324 return -EINVAL;
325 }
326
327 /* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */
328 if (buck234_vol) {
329 while (*buck234_vol != selector) {
330 buck234_vol++;
331 index++;
332 }
333 old_index = s5m8767->buck_gpioindex;
334 s5m8767->buck_gpioindex = index;
335
336 if (index > old_index)
337 return s5m8767_set_high(s5m8767);
338 else
339 return s5m8767_set_low(s5m8767);
340 } else {
341 return regulator_set_voltage_sel_regmap(rdev, selector);
342 }
343 }
344
345 static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
346 unsigned int old_sel,
347 unsigned int new_sel)
348 {
349 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
350 const struct sec_voltage_desc *desc;
351 int reg_id = rdev_get_id(rdev);
352
353 desc = reg_voltage_map[reg_id];
354
355 if ((old_sel < new_sel) && s5m8767->ramp_delay)
356 return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
357 s5m8767->ramp_delay * 1000);
358 return 0;
359 }
360
361 static const struct regulator_ops s5m8767_ops = {
362 .list_voltage = regulator_list_voltage_linear,
363 .is_enabled = regulator_is_enabled_regmap,
364 .enable = regulator_enable_regmap,
365 .disable = regulator_disable_regmap,
366 .get_voltage_sel = regulator_get_voltage_sel_regmap,
367 .set_voltage_sel = s5m8767_set_voltage_sel,
368 .set_voltage_time_sel = s5m8767_set_voltage_time_sel,
369 };
370
371 static const struct regulator_ops s5m8767_buck78_ops = {
372 .list_voltage = regulator_list_voltage_linear,
373 .is_enabled = regulator_is_enabled_regmap,
374 .enable = regulator_enable_regmap,
375 .disable = regulator_disable_regmap,
376 .get_voltage_sel = regulator_get_voltage_sel_regmap,
377 .set_voltage_sel = regulator_set_voltage_sel_regmap,
378 };
379
380 #define s5m8767_regulator_desc(_name) { \
381 .name = #_name, \
382 .id = S5M8767_##_name, \
383 .ops = &s5m8767_ops, \
384 .type = REGULATOR_VOLTAGE, \
385 .owner = THIS_MODULE, \
386 }
387
388 #define s5m8767_regulator_buck78_desc(_name) { \
389 .name = #_name, \
390 .id = S5M8767_##_name, \
391 .ops = &s5m8767_buck78_ops, \
392 .type = REGULATOR_VOLTAGE, \
393 .owner = THIS_MODULE, \
394 }
395
396 static struct regulator_desc regulators[] = {
397 s5m8767_regulator_desc(LDO1),
398 s5m8767_regulator_desc(LDO2),
399 s5m8767_regulator_desc(LDO3),
400 s5m8767_regulator_desc(LDO4),
401 s5m8767_regulator_desc(LDO5),
402 s5m8767_regulator_desc(LDO6),
403 s5m8767_regulator_desc(LDO7),
404 s5m8767_regulator_desc(LDO8),
405 s5m8767_regulator_desc(LDO9),
406 s5m8767_regulator_desc(LDO10),
407 s5m8767_regulator_desc(LDO11),
408 s5m8767_regulator_desc(LDO12),
409 s5m8767_regulator_desc(LDO13),
410 s5m8767_regulator_desc(LDO14),
411 s5m8767_regulator_desc(LDO15),
412 s5m8767_regulator_desc(LDO16),
413 s5m8767_regulator_desc(LDO17),
414 s5m8767_regulator_desc(LDO18),
415 s5m8767_regulator_desc(LDO19),
416 s5m8767_regulator_desc(LDO20),
417 s5m8767_regulator_desc(LDO21),
418 s5m8767_regulator_desc(LDO22),
419 s5m8767_regulator_desc(LDO23),
420 s5m8767_regulator_desc(LDO24),
421 s5m8767_regulator_desc(LDO25),
422 s5m8767_regulator_desc(LDO26),
423 s5m8767_regulator_desc(LDO27),
424 s5m8767_regulator_desc(LDO28),
425 s5m8767_regulator_desc(BUCK1),
426 s5m8767_regulator_desc(BUCK2),
427 s5m8767_regulator_desc(BUCK3),
428 s5m8767_regulator_desc(BUCK4),
429 s5m8767_regulator_desc(BUCK5),
430 s5m8767_regulator_desc(BUCK6),
431 s5m8767_regulator_buck78_desc(BUCK7),
432 s5m8767_regulator_buck78_desc(BUCK8),
433 s5m8767_regulator_desc(BUCK9),
434 };
435
436 /*
437 * Enable GPIO control over BUCK9 in regulator_config for that regulator.
438 */
439 static void s5m8767_regulator_config_ext_control(struct s5m8767_info *s5m8767,
440 struct sec_regulator_data *rdata,
441 struct regulator_config *config)
442 {
443 int i, mode = 0;
444
445 if (rdata->id != S5M8767_BUCK9)
446 return;
447
448 /* Check if opmode for regulator matches S5M8767_ENCTRL_USE_GPIO */
449 for (i = 0; i < s5m8767->num_regulators; i++) {
450 const struct sec_opmode_data *opmode = &s5m8767->opmode[i];
451 if (opmode->id == rdata->id) {
452 mode = s5m8767_opmode_reg[rdata->id][opmode->mode];
453 break;
454 }
455 }
456 if (mode != S5M8767_ENCTRL_USE_GPIO) {
457 dev_warn(s5m8767->dev,
458 "ext-control for %s: mismatched op_mode (%x), ignoring\n",
459 rdata->reg_node->name, mode);
460 return;
461 }
462
463 if (!rdata->ext_control_gpiod) {
464 dev_warn(s5m8767->dev,
465 "ext-control for %s: GPIO not valid, ignoring\n",
466 rdata->reg_node->name);
467 return;
468 }
469
470 config->ena_gpiod = rdata->ext_control_gpiod;
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_kcalloc(&pdev->dev,
557 pdata->num_regulators, sizeof(*rdata),
558 GFP_KERNEL);
559 if (!rdata)
560 return -ENOMEM;
561
562 rmode = devm_kcalloc(&pdev->dev,
563 pdata->num_regulators, sizeof(*rmode),
564 GFP_KERNEL);
565 if (!rmode)
566 return -ENOMEM;
567
568 pdata->regulators = rdata;
569 pdata->opmode = rmode;
570 for_each_child_of_node(regulators_np, reg_np) {
571 for (i = 0; i < ARRAY_SIZE(regulators); i++)
572 if (!of_node_cmp(reg_np->name, regulators[i].name))
573 break;
574
575 if (i == ARRAY_SIZE(regulators)) {
576 dev_warn(iodev->dev,
577 "don't know how to configure regulator %s\n",
578 reg_np->name);
579 continue;
580 }
581
582 rdata->ext_control_gpiod = devm_gpiod_get_from_of_node(&pdev->dev,
583 reg_np,
584 "s5m8767,pmic-ext-control-gpios",
585 0,
586 GPIOD_OUT_HIGH,
587 "s5m8767");
588 if (IS_ERR(rdata->ext_control_gpiod))
589 return PTR_ERR(rdata->ext_control_gpiod);
590
591 rdata->id = i;
592 rdata->initdata = of_get_regulator_init_data(
593 &pdev->dev, reg_np,
594 &regulators[i]);
595 rdata->reg_node = reg_np;
596 rdata++;
597 rmode->id = i;
598 if (of_property_read_u32(reg_np, "op_mode",
599 &rmode->mode)) {
600 dev_warn(iodev->dev,
601 "no op_mode property property at %pOF\n",
602 reg_np);
603
604 rmode->mode = S5M8767_OPMODE_NORMAL_MODE;
605 }
606 rmode++;
607 }
608
609 of_node_put(regulators_np);
610
611 if (of_get_property(pmic_np, "s5m8767,pmic-buck2-uses-gpio-dvs", NULL)) {
612 pdata->buck2_gpiodvs = true;
613
614 if (of_property_read_u32_array(pmic_np,
615 "s5m8767,pmic-buck2-dvs-voltage",
616 pdata->buck2_voltage, dvs_voltage_nr)) {
617 dev_err(iodev->dev, "buck2 voltages not specified\n");
618 return -EINVAL;
619 }
620 }
621
622 if (of_get_property(pmic_np, "s5m8767,pmic-buck3-uses-gpio-dvs", NULL)) {
623 pdata->buck3_gpiodvs = true;
624
625 if (of_property_read_u32_array(pmic_np,
626 "s5m8767,pmic-buck3-dvs-voltage",
627 pdata->buck3_voltage, dvs_voltage_nr)) {
628 dev_err(iodev->dev, "buck3 voltages not specified\n");
629 return -EINVAL;
630 }
631 }
632
633 if (of_get_property(pmic_np, "s5m8767,pmic-buck4-uses-gpio-dvs", NULL)) {
634 pdata->buck4_gpiodvs = true;
635
636 if (of_property_read_u32_array(pmic_np,
637 "s5m8767,pmic-buck4-dvs-voltage",
638 pdata->buck4_voltage, dvs_voltage_nr)) {
639 dev_err(iodev->dev, "buck4 voltages not specified\n");
640 return -EINVAL;
641 }
642 }
643
644 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
645 pdata->buck4_gpiodvs) {
646 ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
647 if (ret)
648 return -EINVAL;
649
650 if (of_property_read_u32(pmic_np,
651 "s5m8767,pmic-buck-default-dvs-idx",
652 &pdata->buck_default_idx)) {
653 pdata->buck_default_idx = 0;
654 } else {
655 if (pdata->buck_default_idx >= 8) {
656 pdata->buck_default_idx = 0;
657 dev_info(iodev->dev,
658 "invalid value for default dvs index, use 0\n");
659 }
660 }
661 }
662
663 ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np);
664 if (ret)
665 return -EINVAL;
666
667 if (of_get_property(pmic_np, "s5m8767,pmic-buck2-ramp-enable", NULL))
668 pdata->buck2_ramp_enable = true;
669
670 if (of_get_property(pmic_np, "s5m8767,pmic-buck3-ramp-enable", NULL))
671 pdata->buck3_ramp_enable = true;
672
673 if (of_get_property(pmic_np, "s5m8767,pmic-buck4-ramp-enable", NULL))
674 pdata->buck4_ramp_enable = true;
675
676 if (pdata->buck2_ramp_enable || pdata->buck3_ramp_enable
677 || pdata->buck4_ramp_enable) {
678 if (of_property_read_u32(pmic_np, "s5m8767,pmic-buck-ramp-delay",
679 &pdata->buck_ramp_delay))
680 pdata->buck_ramp_delay = 0;
681 }
682
683 return 0;
684 }
685 #else
686 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
687 struct sec_platform_data *pdata)
688 {
689 return 0;
690 }
691 #endif /* CONFIG_OF */
692
693 static int s5m8767_pmic_probe(struct platform_device *pdev)
694 {
695 struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
696 struct sec_platform_data *pdata = iodev->pdata;
697 struct regulator_config config = { };
698 struct s5m8767_info *s5m8767;
699 int i, ret, buck_init;
700
701 if (!pdata) {
702 dev_err(pdev->dev.parent, "Platform data not supplied\n");
703 return -ENODEV;
704 }
705
706 if (iodev->dev->of_node) {
707 ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata);
708 if (ret)
709 return ret;
710 }
711
712 if (pdata->buck2_gpiodvs) {
713 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
714 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
715 return -EINVAL;
716 }
717 }
718
719 if (pdata->buck3_gpiodvs) {
720 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
721 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
722 return -EINVAL;
723 }
724 }
725
726 if (pdata->buck4_gpiodvs) {
727 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
728 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
729 return -EINVAL;
730 }
731 }
732
733 s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
734 GFP_KERNEL);
735 if (!s5m8767)
736 return -ENOMEM;
737
738 s5m8767->dev = &pdev->dev;
739 s5m8767->iodev = iodev;
740 s5m8767->num_regulators = pdata->num_regulators;
741 platform_set_drvdata(pdev, s5m8767);
742
743 s5m8767->buck_gpioindex = pdata->buck_default_idx;
744 s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
745 s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
746 s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
747 s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
748 s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
749 s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
750 s5m8767->buck_ds[0] = pdata->buck_ds[0];
751 s5m8767->buck_ds[1] = pdata->buck_ds[1];
752 s5m8767->buck_ds[2] = pdata->buck_ds[2];
753
754 s5m8767->ramp_delay = pdata->buck_ramp_delay;
755 s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
756 s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
757 s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
758 s5m8767->opmode = pdata->opmode;
759
760 buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
761 pdata->buck2_init);
762
763 regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK2DVS2,
764 buck_init);
765
766 buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
767 pdata->buck3_init);
768
769 regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK3DVS2,
770 buck_init);
771
772 buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
773 pdata->buck4_init);
774
775 regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK4DVS2,
776 buck_init);
777
778 for (i = 0; i < 8; i++) {
779 if (s5m8767->buck2_gpiodvs) {
780 s5m8767->buck2_vol[i] =
781 s5m8767_convert_voltage_to_sel(
782 &buck_voltage_val2,
783 pdata->buck2_voltage[i]);
784 }
785
786 if (s5m8767->buck3_gpiodvs) {
787 s5m8767->buck3_vol[i] =
788 s5m8767_convert_voltage_to_sel(
789 &buck_voltage_val2,
790 pdata->buck3_voltage[i]);
791 }
792
793 if (s5m8767->buck4_gpiodvs) {
794 s5m8767->buck4_vol[i] =
795 s5m8767_convert_voltage_to_sel(
796 &buck_voltage_val2,
797 pdata->buck4_voltage[i]);
798 }
799 }
800
801 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
802 pdata->buck4_gpiodvs) {
803
804 if (!gpio_is_valid(pdata->buck_gpios[0]) ||
805 !gpio_is_valid(pdata->buck_gpios[1]) ||
806 !gpio_is_valid(pdata->buck_gpios[2])) {
807 dev_err(&pdev->dev, "GPIO NOT VALID\n");
808 return -EINVAL;
809 }
810
811 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
812 "S5M8767 SET1");
813 if (ret)
814 return ret;
815
816 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
817 "S5M8767 SET2");
818 if (ret)
819 return ret;
820
821 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
822 "S5M8767 SET3");
823 if (ret)
824 return ret;
825
826 /* SET1 GPIO */
827 gpio_direction_output(pdata->buck_gpios[0],
828 (s5m8767->buck_gpioindex >> 2) & 0x1);
829 /* SET2 GPIO */
830 gpio_direction_output(pdata->buck_gpios[1],
831 (s5m8767->buck_gpioindex >> 1) & 0x1);
832 /* SET3 GPIO */
833 gpio_direction_output(pdata->buck_gpios[2],
834 (s5m8767->buck_gpioindex >> 0) & 0x1);
835 }
836
837 ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
838 if (ret)
839 return ret;
840
841 ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
842 if (ret)
843 return ret;
844
845 ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
846 if (ret)
847 return ret;
848
849 /* DS2 GPIO */
850 gpio_direction_output(pdata->buck_ds[0], 0x0);
851 /* DS3 GPIO */
852 gpio_direction_output(pdata->buck_ds[1], 0x0);
853 /* DS4 GPIO */
854 gpio_direction_output(pdata->buck_ds[2], 0x0);
855
856 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
857 pdata->buck4_gpiodvs) {
858 regmap_update_bits(s5m8767->iodev->regmap_pmic,
859 S5M8767_REG_BUCK2CTRL, 1 << 1,
860 (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1));
861 regmap_update_bits(s5m8767->iodev->regmap_pmic,
862 S5M8767_REG_BUCK3CTRL, 1 << 1,
863 (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1));
864 regmap_update_bits(s5m8767->iodev->regmap_pmic,
865 S5M8767_REG_BUCK4CTRL, 1 << 1,
866 (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1));
867 }
868
869 /* Initialize GPIO DVS registers */
870 for (i = 0; i < 8; i++) {
871 if (s5m8767->buck2_gpiodvs) {
872 regmap_write(s5m8767->iodev->regmap_pmic,
873 S5M8767_REG_BUCK2DVS1 + i,
874 s5m8767->buck2_vol[i]);
875 }
876
877 if (s5m8767->buck3_gpiodvs) {
878 regmap_write(s5m8767->iodev->regmap_pmic,
879 S5M8767_REG_BUCK3DVS1 + i,
880 s5m8767->buck3_vol[i]);
881 }
882
883 if (s5m8767->buck4_gpiodvs) {
884 regmap_write(s5m8767->iodev->regmap_pmic,
885 S5M8767_REG_BUCK4DVS1 + i,
886 s5m8767->buck4_vol[i]);
887 }
888 }
889
890 if (s5m8767->buck2_ramp)
891 regmap_update_bits(s5m8767->iodev->regmap_pmic,
892 S5M8767_REG_DVSRAMP, 0x08, 0x08);
893
894 if (s5m8767->buck3_ramp)
895 regmap_update_bits(s5m8767->iodev->regmap_pmic,
896 S5M8767_REG_DVSRAMP, 0x04, 0x04);
897
898 if (s5m8767->buck4_ramp)
899 regmap_update_bits(s5m8767->iodev->regmap_pmic,
900 S5M8767_REG_DVSRAMP, 0x02, 0x02);
901
902 if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
903 || s5m8767->buck4_ramp) {
904 unsigned int val;
905 switch (s5m8767->ramp_delay) {
906 case 5:
907 val = S5M8767_DVS_BUCK_RAMP_5;
908 break;
909 case 10:
910 val = S5M8767_DVS_BUCK_RAMP_10;
911 break;
912 case 25:
913 val = S5M8767_DVS_BUCK_RAMP_25;
914 break;
915 case 50:
916 val = S5M8767_DVS_BUCK_RAMP_50;
917 break;
918 case 100:
919 val = S5M8767_DVS_BUCK_RAMP_100;
920 break;
921 default:
922 val = S5M8767_DVS_BUCK_RAMP_10;
923 }
924 regmap_update_bits(s5m8767->iodev->regmap_pmic,
925 S5M8767_REG_DVSRAMP,
926 S5M8767_DVS_BUCK_RAMP_MASK,
927 val << S5M8767_DVS_BUCK_RAMP_SHIFT);
928 }
929
930 for (i = 0; i < pdata->num_regulators; i++) {
931 const struct sec_voltage_desc *desc;
932 int id = pdata->regulators[i].id;
933 int enable_reg, enable_val;
934 struct regulator_dev *rdev;
935
936 desc = reg_voltage_map[id];
937 if (desc) {
938 regulators[id].n_voltages =
939 (desc->max - desc->min) / desc->step + 1;
940 regulators[id].min_uV = desc->min;
941 regulators[id].uV_step = desc->step;
942 regulators[id].vsel_reg =
943 s5m8767_get_vsel_reg(id, s5m8767);
944 if (id < S5M8767_BUCK1)
945 regulators[id].vsel_mask = 0x3f;
946 else
947 regulators[id].vsel_mask = 0xff;
948
949 ret = s5m8767_get_register(s5m8767, id, &enable_reg,
950 &enable_val);
951 if (ret) {
952 dev_err(s5m8767->dev, "error reading registers\n");
953 return ret;
954 }
955 regulators[id].enable_reg = enable_reg;
956 regulators[id].enable_mask = S5M8767_ENCTRL_MASK;
957 regulators[id].enable_val = enable_val;
958 }
959
960 config.dev = s5m8767->dev;
961 config.init_data = pdata->regulators[i].initdata;
962 config.driver_data = s5m8767;
963 config.regmap = iodev->regmap_pmic;
964 config.of_node = pdata->regulators[i].reg_node;
965 config.ena_gpiod = NULL;
966 if (pdata->regulators[i].ext_control_gpiod)
967 s5m8767_regulator_config_ext_control(s5m8767,
968 &pdata->regulators[i], &config);
969
970 rdev = devm_regulator_register(&pdev->dev, &regulators[id],
971 &config);
972 if (IS_ERR(rdev)) {
973 ret = PTR_ERR(rdev);
974 dev_err(s5m8767->dev, "regulator init failed for %d\n",
975 id);
976 return ret;
977 }
978
979 if (pdata->regulators[i].ext_control_gpiod) {
980 ret = s5m8767_enable_ext_control(s5m8767, rdev);
981 if (ret < 0) {
982 dev_err(s5m8767->dev,
983 "failed to enable gpio control over %s: %d\n",
984 rdev->desc->name, ret);
985 return ret;
986 }
987 }
988 }
989
990 return 0;
991 }
992
993 static const struct platform_device_id s5m8767_pmic_id[] = {
994 { "s5m8767-pmic", 0},
995 { },
996 };
997 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
998
999 static struct platform_driver s5m8767_pmic_driver = {
1000 .driver = {
1001 .name = "s5m8767-pmic",
1002 },
1003 .probe = s5m8767_pmic_probe,
1004 .id_table = s5m8767_pmic_id,
1005 };
1006
1007 static int __init s5m8767_pmic_init(void)
1008 {
1009 return platform_driver_register(&s5m8767_pmic_driver);
1010 }
1011 subsys_initcall(s5m8767_pmic_init);
1012
1013 static void __exit s5m8767_pmic_exit(void)
1014 {
1015 platform_driver_unregister(&s5m8767_pmic_driver);
1016 }
1017 module_exit(s5m8767_pmic_exit);
1018
1019 /* Module information */
1020 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
1021 MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
1022 MODULE_LICENSE("GPL");
Linux with added FPC-III support