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regulator: s5m8767: Check pdata->buck[2|3|4]_gpiodvs earlier
[mirror_ubuntu-artful-kernel.git] / drivers / regulator / s5m8767.c
1 /*
2 * s5m8767.c
3 *
4 * Copyright (c) 2011 Samsung Electronics Co., Ltd
5 * http://www.samsung.com
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 */
13
14 #include <linux/bug.h>
15 #include <linux/delay.h>
16 #include <linux/err.h>
17 #include <linux/gpio.h>
18 #include <linux/slab.h>
19 #include <linux/module.h>
20 #include <linux/platform_device.h>
21 #include <linux/regulator/driver.h>
22 #include <linux/regulator/machine.h>
23 #include <linux/mfd/s5m87xx/s5m-core.h>
24 #include <linux/mfd/s5m87xx/s5m-pmic.h>
25
26 struct s5m8767_info {
27 struct device *dev;
28 struct s5m87xx_dev *iodev;
29 int num_regulators;
30 struct regulator_dev **rdev;
31
32 int ramp_delay;
33 bool buck2_ramp;
34 bool buck3_ramp;
35 bool buck4_ramp;
36
37 bool buck2_gpiodvs;
38 bool buck3_gpiodvs;
39 bool buck4_gpiodvs;
40 u8 buck2_vol[8];
41 u8 buck3_vol[8];
42 u8 buck4_vol[8];
43 int buck_gpios[3];
44 int buck_gpioindex;
45 };
46
47 struct s5m_voltage_desc {
48 int max;
49 int min;
50 int step;
51 };
52
53 static const struct s5m_voltage_desc buck_voltage_val1 = {
54 .max = 2225000,
55 .min = 650000,
56 .step = 6250,
57 };
58
59 static const struct s5m_voltage_desc buck_voltage_val2 = {
60 .max = 1600000,
61 .min = 600000,
62 .step = 6250,
63 };
64
65 static const struct s5m_voltage_desc buck_voltage_val3 = {
66 .max = 3000000,
67 .min = 750000,
68 .step = 12500,
69 };
70
71 static const struct s5m_voltage_desc ldo_voltage_val1 = {
72 .max = 3950000,
73 .min = 800000,
74 .step = 50000,
75 };
76
77 static const struct s5m_voltage_desc ldo_voltage_val2 = {
78 .max = 2375000,
79 .min = 800000,
80 .step = 25000,
81 };
82
83 static const struct s5m_voltage_desc *reg_voltage_map[] = {
84 [S5M8767_LDO1] = &ldo_voltage_val2,
85 [S5M8767_LDO2] = &ldo_voltage_val2,
86 [S5M8767_LDO3] = &ldo_voltage_val1,
87 [S5M8767_LDO4] = &ldo_voltage_val1,
88 [S5M8767_LDO5] = &ldo_voltage_val1,
89 [S5M8767_LDO6] = &ldo_voltage_val2,
90 [S5M8767_LDO7] = &ldo_voltage_val2,
91 [S5M8767_LDO8] = &ldo_voltage_val2,
92 [S5M8767_LDO9] = &ldo_voltage_val1,
93 [S5M8767_LDO10] = &ldo_voltage_val1,
94 [S5M8767_LDO11] = &ldo_voltage_val1,
95 [S5M8767_LDO12] = &ldo_voltage_val1,
96 [S5M8767_LDO13] = &ldo_voltage_val1,
97 [S5M8767_LDO14] = &ldo_voltage_val1,
98 [S5M8767_LDO15] = &ldo_voltage_val2,
99 [S5M8767_LDO16] = &ldo_voltage_val1,
100 [S5M8767_LDO17] = &ldo_voltage_val1,
101 [S5M8767_LDO18] = &ldo_voltage_val1,
102 [S5M8767_LDO19] = &ldo_voltage_val1,
103 [S5M8767_LDO20] = &ldo_voltage_val1,
104 [S5M8767_LDO21] = &ldo_voltage_val1,
105 [S5M8767_LDO22] = &ldo_voltage_val1,
106 [S5M8767_LDO23] = &ldo_voltage_val1,
107 [S5M8767_LDO24] = &ldo_voltage_val1,
108 [S5M8767_LDO25] = &ldo_voltage_val1,
109 [S5M8767_LDO26] = &ldo_voltage_val1,
110 [S5M8767_LDO27] = &ldo_voltage_val1,
111 [S5M8767_LDO28] = &ldo_voltage_val1,
112 [S5M8767_BUCK1] = &buck_voltage_val1,
113 [S5M8767_BUCK2] = &buck_voltage_val2,
114 [S5M8767_BUCK3] = &buck_voltage_val2,
115 [S5M8767_BUCK4] = &buck_voltage_val2,
116 [S5M8767_BUCK5] = &buck_voltage_val1,
117 [S5M8767_BUCK6] = &buck_voltage_val1,
118 [S5M8767_BUCK7] = NULL,
119 [S5M8767_BUCK8] = NULL,
120 [S5M8767_BUCK9] = &buck_voltage_val3,
121 };
122
123 static int s5m8767_list_voltage(struct regulator_dev *rdev,
124 unsigned int selector)
125 {
126 const struct s5m_voltage_desc *desc;
127 int reg_id = rdev_get_id(rdev);
128 int val;
129
130 if (reg_id >= ARRAY_SIZE(reg_voltage_map) || reg_id < 0)
131 return -EINVAL;
132
133 desc = reg_voltage_map[reg_id];
134 if (desc == NULL)
135 return -EINVAL;
136
137 val = desc->min + desc->step * selector;
138 if (val > desc->max)
139 return -EINVAL;
140
141 return val;
142 }
143
144 static int s5m8767_get_register(struct regulator_dev *rdev, int *reg)
145 {
146 int reg_id = rdev_get_id(rdev);
147
148 switch (reg_id) {
149 case S5M8767_LDO1 ... S5M8767_LDO2:
150 *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
151 break;
152 case S5M8767_LDO3 ... S5M8767_LDO28:
153 *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
154 break;
155 case S5M8767_BUCK1:
156 *reg = S5M8767_REG_BUCK1CTRL1;
157 break;
158 case S5M8767_BUCK2 ... S5M8767_BUCK4:
159 *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9;
160 break;
161 case S5M8767_BUCK5:
162 *reg = S5M8767_REG_BUCK5CTRL1;
163 break;
164 case S5M8767_BUCK6 ... S5M8767_BUCK9:
165 *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2;
166 break;
167 default:
168 return -EINVAL;
169 }
170
171 return 0;
172 }
173
174 static int s5m8767_reg_is_enabled(struct regulator_dev *rdev)
175 {
176 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
177 int ret, reg;
178 int mask = 0xc0, pattern = 0xc0;
179 u8 val;
180
181 ret = s5m8767_get_register(rdev, &reg);
182 if (ret == -EINVAL)
183 return 1;
184 else if (ret)
185 return ret;
186
187 ret = s5m_reg_read(s5m8767->iodev, reg, &val);
188 if (ret)
189 return ret;
190
191 return (val & mask) == pattern;
192 }
193
194 static int s5m8767_reg_enable(struct regulator_dev *rdev)
195 {
196 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
197 int ret, reg;
198 int mask = 0xc0, pattern = 0xc0;
199
200 ret = s5m8767_get_register(rdev, &reg);
201 if (ret)
202 return ret;
203
204 return s5m_reg_update(s5m8767->iodev, reg, pattern, mask);
205 }
206
207 static int s5m8767_reg_disable(struct regulator_dev *rdev)
208 {
209 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
210 int ret, reg;
211 int mask = 0xc0, pattern = 0xc0;
212
213 ret = s5m8767_get_register(rdev, &reg);
214 if (ret)
215 return ret;
216
217 return s5m_reg_update(s5m8767->iodev, reg, ~pattern, mask);
218 }
219
220 static int s5m8767_get_voltage_register(struct regulator_dev *rdev, int *_reg)
221 {
222 int reg_id = rdev_get_id(rdev);
223 int reg;
224
225 switch (reg_id) {
226 case S5M8767_LDO1 ... S5M8767_LDO2:
227 reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
228 break;
229 case S5M8767_LDO3 ... S5M8767_LDO28:
230 reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
231 break;
232 case S5M8767_BUCK1:
233 reg = S5M8767_REG_BUCK1CTRL2;
234 break;
235 case S5M8767_BUCK2:
236 reg = S5M8767_REG_BUCK2DVS1;
237 break;
238 case S5M8767_BUCK3:
239 reg = S5M8767_REG_BUCK3DVS1;
240 break;
241 case S5M8767_BUCK4:
242 reg = S5M8767_REG_BUCK4DVS1;
243 break;
244 case S5M8767_BUCK5:
245 reg = S5M8767_REG_BUCK5CTRL2;
246 break;
247 case S5M8767_BUCK6 ... S5M8767_BUCK9:
248 reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
249 break;
250 default:
251 return -EINVAL;
252 }
253
254 *_reg = reg;
255
256 return 0;
257 }
258
259 static int s5m8767_get_voltage_sel(struct regulator_dev *rdev)
260 {
261 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
262 int reg, mask = 0xff, ret;
263 int reg_id = rdev_get_id(rdev);
264 u8 val;
265
266 ret = s5m8767_get_voltage_register(rdev, &reg);
267 if (ret)
268 return ret;
269
270 switch (reg_id) {
271 case S5M8767_LDO1 ... S5M8767_LDO28:
272 mask = 0x3f;
273 break;
274 case S5M8767_BUCK2:
275 if (s5m8767->buck2_gpiodvs)
276 reg += s5m8767->buck_gpioindex;
277 break;
278 case S5M8767_BUCK3:
279 if (s5m8767->buck3_gpiodvs)
280 reg += s5m8767->buck_gpioindex;
281 break;
282 case S5M8767_BUCK4:
283 if (s5m8767->buck4_gpiodvs)
284 reg += s5m8767->buck_gpioindex;
285 break;
286 }
287
288 ret = s5m_reg_read(s5m8767->iodev, reg, &val);
289 if (ret)
290 return ret;
291
292 val &= mask;
293
294 return val;
295 }
296
297 static int s5m8767_convert_voltage_to_sel(
298 const struct s5m_voltage_desc *desc,
299 int min_vol, int max_vol)
300 {
301 int selector = 0;
302
303 if (desc == NULL)
304 return -EINVAL;
305
306 if (max_vol < desc->min || min_vol > desc->max)
307 return -EINVAL;
308
309 selector = (min_vol - desc->min) / desc->step;
310
311 if (desc->min + desc->step * selector > max_vol)
312 return -EINVAL;
313
314 return selector;
315 }
316
317 static int s5m8767_set_voltage(struct regulator_dev *rdev,
318 int min_uV, int max_uV, unsigned *selector)
319 {
320 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
321 const struct s5m_voltage_desc *desc;
322 int reg_id = rdev_get_id(rdev);
323 int reg, mask, ret;
324 int i;
325 u8 val;
326
327 switch (reg_id) {
328 case S5M8767_LDO1 ... S5M8767_LDO28:
329 mask = 0x3f;
330 break;
331 case S5M8767_BUCK1 ... S5M8767_BUCK6:
332 mask = 0xff;
333 break;
334 case S5M8767_BUCK7 ... S5M8767_BUCK8:
335 return -EINVAL;
336 case S5M8767_BUCK9:
337 mask = 0xff;
338 break;
339 default:
340 return -EINVAL;
341 }
342
343 desc = reg_voltage_map[reg_id];
344
345 i = s5m8767_convert_voltage_to_sel(desc, min_uV, max_uV);
346 if (i < 0)
347 return i;
348
349 ret = s5m8767_get_voltage_register(rdev, &reg);
350 if (ret)
351 return ret;
352
353 s5m_reg_read(s5m8767->iodev, reg, &val);
354 val = val & mask;
355
356 ret = s5m_reg_write(s5m8767->iodev, reg, val);
357 *selector = i;
358
359 return ret;
360 }
361
362 static inline void s5m8767_set_high(struct s5m8767_info *s5m8767)
363 {
364 int temp_index = s5m8767->buck_gpioindex;
365
366 gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
367 gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
368 gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
369 }
370
371 static inline void s5m8767_set_low(struct s5m8767_info *s5m8767)
372 {
373 int temp_index = s5m8767->buck_gpioindex;
374
375 gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
376 gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
377 gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
378 }
379
380 static int s5m8767_set_voltage_buck(struct regulator_dev *rdev,
381 int min_uV, int max_uV, unsigned *selector)
382 {
383 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
384 int reg_id = rdev_get_id(rdev);
385 const struct s5m_voltage_desc *desc;
386 int new_val, old_val, i = 0;
387
388 if (reg_id < S5M8767_BUCK1 || reg_id > S5M8767_BUCK6)
389 return -EINVAL;
390
391 switch (reg_id) {
392 case S5M8767_BUCK1:
393 return s5m8767_set_voltage(rdev, min_uV, max_uV, selector);
394 case S5M8767_BUCK2 ... S5M8767_BUCK4:
395 break;
396 case S5M8767_BUCK5 ... S5M8767_BUCK6:
397 return s5m8767_set_voltage(rdev, min_uV, max_uV, selector);
398 case S5M8767_BUCK9:
399 return s5m8767_set_voltage(rdev, min_uV, max_uV, selector);
400 }
401
402 desc = reg_voltage_map[reg_id];
403 new_val = s5m8767_convert_voltage_to_sel(desc, min_uV, max_uV);
404 if (new_val < 0)
405 return new_val;
406
407 switch (reg_id) {
408 case S5M8767_BUCK2:
409 if (s5m8767->buck2_gpiodvs) {
410 while (s5m8767->buck2_vol[i] != new_val)
411 i++;
412 } else
413 return s5m8767_set_voltage(rdev, min_uV,
414 max_uV, selector);
415 break;
416 case S5M8767_BUCK3:
417 if (s5m8767->buck3_gpiodvs) {
418 while (s5m8767->buck3_vol[i] != new_val)
419 i++;
420 } else
421 return s5m8767_set_voltage(rdev, min_uV,
422 max_uV, selector);
423 break;
424 case S5M8767_BUCK4:
425 if (s5m8767->buck3_gpiodvs) {
426 while (s5m8767->buck4_vol[i] != new_val)
427 i++;
428 } else
429 return s5m8767_set_voltage(rdev, min_uV,
430 max_uV, selector);
431 break;
432 }
433
434 old_val = s5m8767->buck_gpioindex;
435 s5m8767->buck_gpioindex = i;
436
437 if (i > old_val)
438 s5m8767_set_high(s5m8767);
439 else
440 s5m8767_set_low(s5m8767);
441
442 *selector = new_val;
443 return 0;
444 }
445
446 static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
447 unsigned int old_sel,
448 unsigned int new_sel)
449 {
450 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
451 const struct s5m_voltage_desc *desc;
452 int reg_id = rdev_get_id(rdev);
453
454 desc = reg_voltage_map[reg_id];
455
456 if (old_sel < new_sel)
457 return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
458 s5m8767->ramp_delay * 1000);
459 return 0;
460 }
461
462 static struct regulator_ops s5m8767_ldo_ops = {
463 .list_voltage = s5m8767_list_voltage,
464 .is_enabled = s5m8767_reg_is_enabled,
465 .enable = s5m8767_reg_enable,
466 .disable = s5m8767_reg_disable,
467 .get_voltage_sel = s5m8767_get_voltage_sel,
468 .set_voltage = s5m8767_set_voltage,
469 .set_voltage_time_sel = s5m8767_set_voltage_time_sel,
470 };
471
472 static struct regulator_ops s5m8767_buck_ops = {
473 .list_voltage = s5m8767_list_voltage,
474 .is_enabled = s5m8767_reg_is_enabled,
475 .enable = s5m8767_reg_enable,
476 .disable = s5m8767_reg_disable,
477 .get_voltage_sel = s5m8767_get_voltage_sel,
478 .set_voltage = s5m8767_set_voltage_buck,
479 .set_voltage_time_sel = s5m8767_set_voltage_time_sel,
480 };
481
482 #define regulator_desc_ldo(num) { \
483 .name = "LDO"#num, \
484 .id = S5M8767_LDO##num, \
485 .ops = &s5m8767_ldo_ops, \
486 .type = REGULATOR_VOLTAGE, \
487 .owner = THIS_MODULE, \
488 }
489 #define regulator_desc_buck(num) { \
490 .name = "BUCK"#num, \
491 .id = S5M8767_BUCK##num, \
492 .ops = &s5m8767_buck_ops, \
493 .type = REGULATOR_VOLTAGE, \
494 .owner = THIS_MODULE, \
495 }
496
497 static struct regulator_desc regulators[] = {
498 regulator_desc_ldo(1),
499 regulator_desc_ldo(2),
500 regulator_desc_ldo(3),
501 regulator_desc_ldo(4),
502 regulator_desc_ldo(5),
503 regulator_desc_ldo(6),
504 regulator_desc_ldo(7),
505 regulator_desc_ldo(8),
506 regulator_desc_ldo(9),
507 regulator_desc_ldo(10),
508 regulator_desc_ldo(11),
509 regulator_desc_ldo(12),
510 regulator_desc_ldo(13),
511 regulator_desc_ldo(14),
512 regulator_desc_ldo(15),
513 regulator_desc_ldo(16),
514 regulator_desc_ldo(17),
515 regulator_desc_ldo(18),
516 regulator_desc_ldo(19),
517 regulator_desc_ldo(20),
518 regulator_desc_ldo(21),
519 regulator_desc_ldo(22),
520 regulator_desc_ldo(23),
521 regulator_desc_ldo(24),
522 regulator_desc_ldo(25),
523 regulator_desc_ldo(26),
524 regulator_desc_ldo(27),
525 regulator_desc_ldo(28),
526 regulator_desc_buck(1),
527 regulator_desc_buck(2),
528 regulator_desc_buck(3),
529 regulator_desc_buck(4),
530 regulator_desc_buck(5),
531 regulator_desc_buck(6),
532 regulator_desc_buck(7),
533 regulator_desc_buck(8),
534 regulator_desc_buck(9),
535 };
536
537 static __devinit int s5m8767_pmic_probe(struct platform_device *pdev)
538 {
539 struct s5m87xx_dev *iodev = dev_get_drvdata(pdev->dev.parent);
540 struct s5m_platform_data *pdata = dev_get_platdata(iodev->dev);
541 struct regulator_dev **rdev;
542 struct s5m8767_info *s5m8767;
543 int i, ret, size;
544
545 if (!pdata) {
546 dev_err(pdev->dev.parent, "Platform data not supplied\n");
547 return -ENODEV;
548 }
549
550 if (pdata->buck2_gpiodvs) {
551 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
552 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
553 return -EINVAL;
554 }
555 }
556
557 if (pdata->buck3_gpiodvs) {
558 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
559 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
560 return -EINVAL;
561 }
562 }
563
564 if (pdata->buck4_gpiodvs) {
565 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
566 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
567 return -EINVAL;
568 }
569 }
570
571 s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
572 GFP_KERNEL);
573 if (!s5m8767)
574 return -ENOMEM;
575
576 size = sizeof(struct regulator_dev *) * (S5M8767_REG_MAX - 2);
577 s5m8767->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
578 if (!s5m8767->rdev)
579 return -ENOMEM;
580
581 rdev = s5m8767->rdev;
582 s5m8767->dev = &pdev->dev;
583 s5m8767->iodev = iodev;
584 s5m8767->num_regulators = S5M8767_REG_MAX - 2;
585 platform_set_drvdata(pdev, s5m8767);
586
587 s5m8767->buck_gpioindex = pdata->buck_default_idx;
588 s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
589 s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
590 s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
591 s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
592 s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
593 s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
594 s5m8767->ramp_delay = pdata->buck_ramp_delay;
595 s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
596 s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
597 s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
598
599 for (i = 0; i < 8; i++) {
600 if (s5m8767->buck2_gpiodvs) {
601 s5m8767->buck2_vol[i] =
602 s5m8767_convert_voltage_to_sel(
603 &buck_voltage_val2,
604 pdata->buck2_voltage[i],
605 pdata->buck2_voltage[i] +
606 buck_voltage_val2.step);
607 }
608
609 if (s5m8767->buck3_gpiodvs) {
610 s5m8767->buck3_vol[i] =
611 s5m8767_convert_voltage_to_sel(
612 &buck_voltage_val2,
613 pdata->buck3_voltage[i],
614 pdata->buck3_voltage[i] +
615 buck_voltage_val2.step);
616 }
617
618 if (s5m8767->buck4_gpiodvs) {
619 s5m8767->buck4_vol[i] =
620 s5m8767_convert_voltage_to_sel(
621 &buck_voltage_val2,
622 pdata->buck4_voltage[i],
623 pdata->buck4_voltage[i] +
624 buck_voltage_val2.step);
625 }
626 }
627
628 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
629 pdata->buck4_gpiodvs) {
630 if (gpio_is_valid(pdata->buck_gpios[0]) &&
631 gpio_is_valid(pdata->buck_gpios[1]) &&
632 gpio_is_valid(pdata->buck_gpios[2])) {
633 ret = gpio_request(pdata->buck_gpios[0],
634 "S5M8767 SET1");
635 if (ret == -EBUSY)
636 dev_warn(&pdev->dev, "Duplicated gpio request for SET1\n");
637
638 ret = gpio_request(pdata->buck_gpios[1],
639 "S5M8767 SET2");
640 if (ret == -EBUSY)
641 dev_warn(&pdev->dev, "Duplicated gpio request for SET2\n");
642
643 ret = gpio_request(pdata->buck_gpios[2],
644 "S5M8767 SET3");
645 if (ret == -EBUSY)
646 dev_warn(&pdev->dev, "Duplicated gpio request for SET3\n");
647 /* SET1 GPIO */
648 gpio_direction_output(pdata->buck_gpios[0],
649 (s5m8767->buck_gpioindex >> 2) & 0x1);
650 /* SET2 GPIO */
651 gpio_direction_output(pdata->buck_gpios[1],
652 (s5m8767->buck_gpioindex >> 1) & 0x1);
653 /* SET3 GPIO */
654 gpio_direction_output(pdata->buck_gpios[2],
655 (s5m8767->buck_gpioindex >> 0) & 0x1);
656 ret = 0;
657 } else {
658 dev_err(&pdev->dev, "GPIO NOT VALID\n");
659 ret = -EINVAL;
660 return ret;
661 }
662 }
663
664 s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK2CTRL,
665 (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1);
666 s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK3CTRL,
667 (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1);
668 s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK4CTRL,
669 (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1);
670
671 /* Initialize GPIO DVS registers */
672 for (i = 0; i < 8; i++) {
673 if (s5m8767->buck2_gpiodvs) {
674 s5m_reg_write(s5m8767->iodev, S5M8767_REG_BUCK2DVS1 + i,
675 s5m8767->buck2_vol[i]);
676 }
677
678 if (s5m8767->buck3_gpiodvs) {
679 s5m_reg_write(s5m8767->iodev, S5M8767_REG_BUCK3DVS1 + i,
680 s5m8767->buck3_vol[i]);
681 }
682
683 if (s5m8767->buck4_gpiodvs) {
684 s5m_reg_write(s5m8767->iodev, S5M8767_REG_BUCK4DVS1 + i,
685 s5m8767->buck4_vol[i]);
686 }
687 }
688 s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK2CTRL, 0x78, 0xff);
689 s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK3CTRL, 0x58, 0xff);
690 s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK4CTRL, 0x78, 0xff);
691
692 if (s5m8767->buck2_ramp)
693 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x08, 0x08);
694
695 if (s5m8767->buck3_ramp)
696 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x04, 0x04);
697
698 if (s5m8767->buck4_ramp)
699 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x02, 0x02);
700
701 if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
702 || s5m8767->buck4_ramp) {
703 switch (s5m8767->ramp_delay) {
704 case 15:
705 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
706 0xc0, 0xf0);
707 break;
708 case 25:
709 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
710 0xd0, 0xf0);
711 break;
712 case 50:
713 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
714 0xe0, 0xf0);
715 break;
716 case 100:
717 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
718 0xf0, 0xf0);
719 break;
720 default:
721 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
722 0x90, 0xf0);
723 }
724 }
725
726 for (i = 0; i < pdata->num_regulators; i++) {
727 const struct s5m_voltage_desc *desc;
728 int id = pdata->regulators[i].id;
729
730 desc = reg_voltage_map[id];
731 if (desc)
732 regulators[id].n_voltages =
733 (desc->max - desc->min) / desc->step + 1;
734
735 rdev[i] = regulator_register(&regulators[id], s5m8767->dev,
736 pdata->regulators[i].initdata, s5m8767, NULL);
737 if (IS_ERR(rdev[i])) {
738 ret = PTR_ERR(rdev[i]);
739 dev_err(s5m8767->dev, "regulator init failed for %d\n",
740 id);
741 rdev[i] = NULL;
742 goto err;
743 }
744 }
745
746 return 0;
747 err:
748 for (i = 0; i < s5m8767->num_regulators; i++)
749 if (rdev[i])
750 regulator_unregister(rdev[i]);
751
752 return ret;
753 }
754
755 static int __devexit s5m8767_pmic_remove(struct platform_device *pdev)
756 {
757 struct s5m8767_info *s5m8767 = platform_get_drvdata(pdev);
758 struct regulator_dev **rdev = s5m8767->rdev;
759 int i;
760
761 for (i = 0; i < s5m8767->num_regulators; i++)
762 if (rdev[i])
763 regulator_unregister(rdev[i]);
764
765 return 0;
766 }
767
768 static const struct platform_device_id s5m8767_pmic_id[] = {
769 { "s5m8767-pmic", 0},
770 { },
771 };
772 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
773
774 static struct platform_driver s5m8767_pmic_driver = {
775 .driver = {
776 .name = "s5m8767-pmic",
777 .owner = THIS_MODULE,
778 },
779 .probe = s5m8767_pmic_probe,
780 .remove = __devexit_p(s5m8767_pmic_remove),
781 .id_table = s5m8767_pmic_id,
782 };
783
784 static int __init s5m8767_pmic_init(void)
785 {
786 return platform_driver_register(&s5m8767_pmic_driver);
787 }
788 subsys_initcall(s5m8767_pmic_init);
789
790 static void __exit s5m8767_pmic_exit(void)
791 {
792 platform_driver_unregister(&s5m8767_pmic_driver);
793 }
794 module_exit(s5m8767_pmic_exit);
795
796 /* Module information */
797 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
798 MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
799 MODULE_LICENSE("GPL");
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