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regulator: s5m8767: Fix unused variable warning in probe()
[deliverable/linux.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 inline int s5m8767_convert_voltage(
298 const struct s5m_voltage_desc *desc,
299 int min_vol, int max_vol)
300 {
301 int out_vol = 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 out_vol = (min_vol - desc->min) / desc->step;
310
311 if (desc->min + desc->step * out_vol > max_vol)
312 return -EINVAL;
313
314 return out_vol;
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 int min_vol = min_uV, max_vol = max_uV;
322 const struct s5m_voltage_desc *desc;
323 int reg_id = rdev_get_id(rdev);
324 int reg, mask, ret;
325 int i;
326 u8 val;
327
328 switch (reg_id) {
329 case S5M8767_LDO1 ... S5M8767_LDO28:
330 mask = 0x3f;
331 break;
332 case S5M8767_BUCK1 ... S5M8767_BUCK6:
333 mask = 0xff;
334 break;
335 case S5M8767_BUCK7 ... S5M8767_BUCK8:
336 return -EINVAL;
337 case S5M8767_BUCK9:
338 mask = 0xff;
339 break;
340 default:
341 return -EINVAL;
342 }
343
344 desc = reg_voltage_map[reg_id];
345
346 i = s5m8767_convert_voltage(desc, min_vol, max_vol);
347 if (i < 0)
348 return i;
349
350 ret = s5m8767_get_voltage_register(rdev, &reg);
351 if (ret)
352 return ret;
353
354 s5m_reg_read(s5m8767->iodev, reg, &val);
355 val = val & mask;
356
357 ret = s5m_reg_write(s5m8767->iodev, reg, val);
358 *selector = i;
359
360 return ret;
361 }
362
363 static inline void s5m8767_set_high(struct s5m8767_info *s5m8767)
364 {
365 int temp_index = s5m8767->buck_gpioindex;
366
367 gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
368 gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
369 gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
370 }
371
372 static inline void s5m8767_set_low(struct s5m8767_info *s5m8767)
373 {
374 int temp_index = s5m8767->buck_gpioindex;
375
376 gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
377 gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
378 gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
379 }
380
381 static int s5m8767_set_voltage_buck(struct regulator_dev *rdev,
382 int min_uV, int max_uV, unsigned *selector)
383 {
384 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
385 int reg_id = rdev_get_id(rdev);
386 const struct s5m_voltage_desc *desc;
387 int new_val, old_val, i = 0;
388 int min_vol = min_uV, max_vol = max_uV;
389
390 if (reg_id < S5M8767_BUCK1 || reg_id > S5M8767_BUCK6)
391 return -EINVAL;
392
393 switch (reg_id) {
394 case S5M8767_BUCK1:
395 return s5m8767_set_voltage(rdev, min_uV, max_uV, selector);
396 case S5M8767_BUCK2 ... S5M8767_BUCK4:
397 break;
398 case S5M8767_BUCK5 ... S5M8767_BUCK6:
399 return s5m8767_set_voltage(rdev, min_uV, max_uV, selector);
400 case S5M8767_BUCK9:
401 return s5m8767_set_voltage(rdev, min_uV, max_uV, selector);
402 }
403
404 desc = reg_voltage_map[reg_id];
405 new_val = s5m8767_convert_voltage(desc, min_vol, max_vol);
406 if (new_val < 0)
407 return new_val;
408
409 switch (reg_id) {
410 case S5M8767_BUCK2:
411 if (s5m8767->buck2_gpiodvs) {
412 while (s5m8767->buck2_vol[i] != new_val)
413 i++;
414 } else
415 return s5m8767_set_voltage(rdev, min_uV,
416 max_uV, selector);
417 break;
418 case S5M8767_BUCK3:
419 if (s5m8767->buck3_gpiodvs) {
420 while (s5m8767->buck3_vol[i] != new_val)
421 i++;
422 } else
423 return s5m8767_set_voltage(rdev, min_uV,
424 max_uV, selector);
425 break;
426 case S5M8767_BUCK4:
427 if (s5m8767->buck3_gpiodvs) {
428 while (s5m8767->buck4_vol[i] != new_val)
429 i++;
430 } else
431 return s5m8767_set_voltage(rdev, min_uV,
432 max_uV, selector);
433 break;
434 }
435
436 old_val = s5m8767->buck_gpioindex;
437 s5m8767->buck_gpioindex = i;
438
439 if (i > old_val)
440 s5m8767_set_high(s5m8767);
441 else
442 s5m8767_set_low(s5m8767);
443
444 *selector = new_val;
445 return 0;
446 }
447
448 static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
449 unsigned int old_sel,
450 unsigned int new_sel)
451 {
452 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
453 const struct s5m_voltage_desc *desc;
454 int reg_id = rdev_get_id(rdev);
455 int mask;
456 int new_val, old_val;
457
458 switch (reg_id) {
459 case S5M8767_LDO1 ... S5M8767_LDO28:
460 mask = 0x3f;
461 break;
462 case S5M8767_BUCK1 ... S5M8767_BUCK6:
463 mask = 0xff;
464 break;
465 case S5M8767_BUCK7 ... S5M8767_BUCK8:
466 return -EINVAL;
467 case S5M8767_BUCK9:
468 mask = 0xff;
469 break;
470 default:
471 return -EINVAL;
472 }
473 desc = reg_voltage_map[reg_id];
474
475 new_val = s5m8767_convert_voltage(desc, new_sel, new_sel);
476 if (new_val < 0)
477 return new_val;
478
479 old_val = s5m8767_convert_voltage(desc, old_sel, old_sel);
480 if (old_val < 0)
481 return old_val;
482
483 if (old_sel < new_sel)
484 return DIV_ROUND_UP(desc->step * (new_val - old_val),
485 s5m8767->ramp_delay);
486 else
487 return 0;
488 }
489
490 static struct regulator_ops s5m8767_ldo_ops = {
491 .list_voltage = s5m8767_list_voltage,
492 .is_enabled = s5m8767_reg_is_enabled,
493 .enable = s5m8767_reg_enable,
494 .disable = s5m8767_reg_disable,
495 .get_voltage_sel = s5m8767_get_voltage_sel,
496 .set_voltage = s5m8767_set_voltage,
497 .set_voltage_time_sel = s5m8767_set_voltage_time_sel,
498 };
499
500 static struct regulator_ops s5m8767_buck_ops = {
501 .list_voltage = s5m8767_list_voltage,
502 .is_enabled = s5m8767_reg_is_enabled,
503 .enable = s5m8767_reg_enable,
504 .disable = s5m8767_reg_disable,
505 .get_voltage_sel = s5m8767_get_voltage_sel,
506 .set_voltage = s5m8767_set_voltage_buck,
507 .set_voltage_time_sel = s5m8767_set_voltage_time_sel,
508 };
509
510 #define regulator_desc_ldo(num) { \
511 .name = "LDO"#num, \
512 .id = S5M8767_LDO##num, \
513 .ops = &s5m8767_ldo_ops, \
514 .type = REGULATOR_VOLTAGE, \
515 .owner = THIS_MODULE, \
516 }
517 #define regulator_desc_buck(num) { \
518 .name = "BUCK"#num, \
519 .id = S5M8767_BUCK##num, \
520 .ops = &s5m8767_buck_ops, \
521 .type = REGULATOR_VOLTAGE, \
522 .owner = THIS_MODULE, \
523 }
524
525 static struct regulator_desc regulators[] = {
526 regulator_desc_ldo(1),
527 regulator_desc_ldo(2),
528 regulator_desc_ldo(3),
529 regulator_desc_ldo(4),
530 regulator_desc_ldo(5),
531 regulator_desc_ldo(6),
532 regulator_desc_ldo(7),
533 regulator_desc_ldo(8),
534 regulator_desc_ldo(9),
535 regulator_desc_ldo(10),
536 regulator_desc_ldo(11),
537 regulator_desc_ldo(12),
538 regulator_desc_ldo(13),
539 regulator_desc_ldo(14),
540 regulator_desc_ldo(15),
541 regulator_desc_ldo(16),
542 regulator_desc_ldo(17),
543 regulator_desc_ldo(18),
544 regulator_desc_ldo(19),
545 regulator_desc_ldo(20),
546 regulator_desc_ldo(21),
547 regulator_desc_ldo(22),
548 regulator_desc_ldo(23),
549 regulator_desc_ldo(24),
550 regulator_desc_ldo(25),
551 regulator_desc_ldo(26),
552 regulator_desc_ldo(27),
553 regulator_desc_ldo(28),
554 regulator_desc_buck(1),
555 regulator_desc_buck(2),
556 regulator_desc_buck(3),
557 regulator_desc_buck(4),
558 regulator_desc_buck(5),
559 regulator_desc_buck(6),
560 regulator_desc_buck(7),
561 regulator_desc_buck(8),
562 regulator_desc_buck(9),
563 };
564
565 static __devinit int s5m8767_pmic_probe(struct platform_device *pdev)
566 {
567 struct s5m87xx_dev *iodev = dev_get_drvdata(pdev->dev.parent);
568 struct s5m_platform_data *pdata = dev_get_platdata(iodev->dev);
569 struct regulator_dev **rdev;
570 struct s5m8767_info *s5m8767;
571 struct i2c_client *i2c;
572 int i, ret, size;
573
574 if (!pdata) {
575 dev_err(pdev->dev.parent, "Platform data not supplied\n");
576 return -ENODEV;
577 }
578
579 s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
580 GFP_KERNEL);
581 if (!s5m8767)
582 return -ENOMEM;
583
584 size = sizeof(struct regulator_dev *) * (S5M8767_REG_MAX - 2);
585 s5m8767->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
586 if (!s5m8767->rdev)
587 return -ENOMEM;
588
589 rdev = s5m8767->rdev;
590 s5m8767->dev = &pdev->dev;
591 s5m8767->iodev = iodev;
592 s5m8767->num_regulators = S5M8767_REG_MAX - 2;
593 platform_set_drvdata(pdev, s5m8767);
594 i2c = s5m8767->iodev->i2c;
595
596 s5m8767->buck_gpioindex = pdata->buck_default_idx;
597 s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
598 s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
599 s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
600 s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
601 s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
602 s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
603 s5m8767->ramp_delay = pdata->buck_ramp_delay;
604 s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
605 s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
606 s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
607
608 for (i = 0; i < 8; i++) {
609 if (s5m8767->buck2_gpiodvs) {
610 s5m8767->buck2_vol[i] =
611 s5m8767_convert_voltage(
612 &buck_voltage_val2,
613 pdata->buck2_voltage[i],
614 pdata->buck2_voltage[i] +
615 buck_voltage_val2.step);
616 }
617
618 if (s5m8767->buck3_gpiodvs) {
619 s5m8767->buck3_vol[i] =
620 s5m8767_convert_voltage(
621 &buck_voltage_val2,
622 pdata->buck3_voltage[i],
623 pdata->buck3_voltage[i] +
624 buck_voltage_val2.step);
625 }
626
627 if (s5m8767->buck4_gpiodvs) {
628 s5m8767->buck4_vol[i] =
629 s5m8767_convert_voltage(
630 &buck_voltage_val2,
631 pdata->buck4_voltage[i],
632 pdata->buck4_voltage[i] +
633 buck_voltage_val2.step);
634 }
635 }
636
637 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
638 pdata->buck4_gpiodvs) {
639 if (gpio_is_valid(pdata->buck_gpios[0]) &&
640 gpio_is_valid(pdata->buck_gpios[1]) &&
641 gpio_is_valid(pdata->buck_gpios[2])) {
642 ret = gpio_request(pdata->buck_gpios[0],
643 "S5M8767 SET1");
644 if (ret == -EBUSY)
645 dev_warn(&pdev->dev, "Duplicated gpio request for SET1\n");
646
647 ret = gpio_request(pdata->buck_gpios[1],
648 "S5M8767 SET2");
649 if (ret == -EBUSY)
650 dev_warn(&pdev->dev, "Duplicated gpio request for SET2\n");
651
652 ret = gpio_request(pdata->buck_gpios[2],
653 "S5M8767 SET3");
654 if (ret == -EBUSY)
655 dev_warn(&pdev->dev, "Duplicated gpio request for SET3\n");
656 /* SET1 GPIO */
657 gpio_direction_output(pdata->buck_gpios[0],
658 (s5m8767->buck_gpioindex >> 2) & 0x1);
659 /* SET2 GPIO */
660 gpio_direction_output(pdata->buck_gpios[1],
661 (s5m8767->buck_gpioindex >> 1) & 0x1);
662 /* SET3 GPIO */
663 gpio_direction_output(pdata->buck_gpios[2],
664 (s5m8767->buck_gpioindex >> 0) & 0x1);
665 ret = 0;
666 } else {
667 dev_err(&pdev->dev, "GPIO NOT VALID\n");
668 ret = -EINVAL;
669 return ret;
670 }
671 }
672
673 if (pdata->buck2_gpiodvs) {
674 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
675 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
676 ret = -EINVAL;
677 return ret;
678 }
679 }
680
681 if (pdata->buck3_gpiodvs) {
682 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
683 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
684 ret = -EINVAL;
685 return ret;
686 }
687 }
688
689 if (pdata->buck4_gpiodvs) {
690 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
691 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
692 ret = -EINVAL;
693 return ret;
694 }
695 }
696
697 s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK2CTRL,
698 (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1);
699 s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK3CTRL,
700 (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1);
701 s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK4CTRL,
702 (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1);
703
704 /* Initialize GPIO DVS registers */
705 for (i = 0; i < 8; i++) {
706 if (s5m8767->buck2_gpiodvs) {
707 s5m_reg_write(s5m8767->iodev, S5M8767_REG_BUCK2DVS1 + i,
708 s5m8767->buck2_vol[i]);
709 }
710
711 if (s5m8767->buck3_gpiodvs) {
712 s5m_reg_write(s5m8767->iodev, S5M8767_REG_BUCK3DVS1 + i,
713 s5m8767->buck3_vol[i]);
714 }
715
716 if (s5m8767->buck4_gpiodvs) {
717 s5m_reg_write(s5m8767->iodev, S5M8767_REG_BUCK4DVS1 + i,
718 s5m8767->buck4_vol[i]);
719 }
720 }
721 s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK2CTRL, 0x78, 0xff);
722 s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK3CTRL, 0x58, 0xff);
723 s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK4CTRL, 0x78, 0xff);
724
725 if (s5m8767->buck2_ramp)
726 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x08, 0x08);
727
728 if (s5m8767->buck3_ramp)
729 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x04, 0x04);
730
731 if (s5m8767->buck4_ramp)
732 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x02, 0x02);
733
734 if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
735 || s5m8767->buck4_ramp) {
736 switch (s5m8767->ramp_delay) {
737 case 15:
738 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
739 0xc0, 0xf0);
740 break;
741 case 25:
742 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
743 0xd0, 0xf0);
744 break;
745 case 50:
746 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
747 0xe0, 0xf0);
748 break;
749 case 100:
750 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
751 0xf0, 0xf0);
752 break;
753 default:
754 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
755 0x90, 0xf0);
756 }
757 }
758
759 for (i = 0; i < pdata->num_regulators; i++) {
760 const struct s5m_voltage_desc *desc;
761 int id = pdata->regulators[i].id;
762
763 desc = reg_voltage_map[id];
764 if (desc)
765 regulators[id].n_voltages =
766 (desc->max - desc->min) / desc->step + 1;
767
768 rdev[i] = regulator_register(&regulators[id], s5m8767->dev,
769 pdata->regulators[i].initdata, s5m8767, NULL);
770 if (IS_ERR(rdev[i])) {
771 ret = PTR_ERR(rdev[i]);
772 dev_err(s5m8767->dev, "regulator init failed for %d\n",
773 id);
774 rdev[i] = NULL;
775 goto err;
776 }
777 }
778
779 return 0;
780 err:
781 for (i = 0; i < s5m8767->num_regulators; i++)
782 if (rdev[i])
783 regulator_unregister(rdev[i]);
784
785 return ret;
786 }
787
788 static int __devexit s5m8767_pmic_remove(struct platform_device *pdev)
789 {
790 struct s5m8767_info *s5m8767 = platform_get_drvdata(pdev);
791 struct regulator_dev **rdev = s5m8767->rdev;
792 int i;
793
794 for (i = 0; i < s5m8767->num_regulators; i++)
795 if (rdev[i])
796 regulator_unregister(rdev[i]);
797
798 return 0;
799 }
800
801 static const struct platform_device_id s5m8767_pmic_id[] = {
802 { "s5m8767-pmic", 0},
803 { },
804 };
805 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
806
807 static struct platform_driver s5m8767_pmic_driver = {
808 .driver = {
809 .name = "s5m8767-pmic",
810 .owner = THIS_MODULE,
811 },
812 .probe = s5m8767_pmic_probe,
813 .remove = __devexit_p(s5m8767_pmic_remove),
814 .id_table = s5m8767_pmic_id,
815 };
816
817 static int __init s5m8767_pmic_init(void)
818 {
819 return platform_driver_register(&s5m8767_pmic_driver);
820 }
821 subsys_initcall(s5m8767_pmic_init);
822
823 static void __exit s5m8767_pmic_exit(void)
824 {
825 platform_driver_unregister(&s5m8767_pmic_driver);
826 }
827 module_exit(s5m8767_pmic_exit);
828
829 /* Module information */
830 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
831 MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
832 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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