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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/err.h>
16#include <linux/gpio.h>
17#include <linux/slab.h>
18#include <linux/module.h>
19#include <linux/platform_device.h>
20#include <linux/regulator/driver.h>
21#include <linux/regulator/machine.h>
22#include <linux/mfd/s5m87xx/s5m-core.h>
23#include <linux/mfd/s5m87xx/s5m-pmic.h>
24
25struct s5m8767_info {
26 struct device *dev;
27 struct s5m87xx_dev *iodev;
28 int num_regulators;
29 struct regulator_dev **rdev;
30 struct s5m_opmode_data *opmode;
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
47struct s5m_voltage_desc {
48 int max;
49 int min;
50 int step;
51};
52
53static const struct s5m_voltage_desc buck_voltage_val1 = {
54 .max = 2225000,
55 .min = 650000,
56 .step = 6250,
57};
58
59static const struct s5m_voltage_desc buck_voltage_val2 = {
60 .max = 1600000,
61 .min = 600000,
62 .step = 6250,
63};
64
65static const struct s5m_voltage_desc buck_voltage_val3 = {
66 .max = 3000000,
67 .min = 750000,
68 .step = 12500,
69};
70
71static const struct s5m_voltage_desc ldo_voltage_val1 = {
72 .max = 3950000,
73 .min = 800000,
74 .step = 50000,
75};
76
77static const struct s5m_voltage_desc ldo_voltage_val2 = {
78 .max = 2375000,
79 .min = 800000,
80 .step = 25000,
81};
82
83static 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
123static 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
144static unsigned int s5m8767_opmode_reg[][4] = {
145 /* {OFF, ON, LOWPOWER, SUSPEND} */
146 /* LDO1 ... LDO28 */
147 {0x0, 0x3, 0x2, 0x1}, /* LDO1 */
148 {0x0, 0x3, 0x2, 0x1},
149 {0x0, 0x3, 0x2, 0x1},
150 {0x0, 0x0, 0x0, 0x0},
151 {0x0, 0x3, 0x2, 0x1}, /* LDO5 */
152 {0x0, 0x3, 0x2, 0x1},
153 {0x0, 0x3, 0x2, 0x1},
154 {0x0, 0x3, 0x2, 0x1},
155 {0x0, 0x3, 0x2, 0x1},
156 {0x0, 0x3, 0x2, 0x1}, /* LDO10 */
157 {0x0, 0x3, 0x2, 0x1},
158 {0x0, 0x3, 0x2, 0x1},
159 {0x0, 0x3, 0x2, 0x1},
160 {0x0, 0x3, 0x2, 0x1},
161 {0x0, 0x3, 0x2, 0x1}, /* LDO15 */
162 {0x0, 0x3, 0x2, 0x1},
163 {0x0, 0x3, 0x2, 0x1},
164 {0x0, 0x0, 0x0, 0x0},
165 {0x0, 0x3, 0x2, 0x1},
166 {0x0, 0x3, 0x2, 0x1}, /* LDO20 */
167 {0x0, 0x3, 0x2, 0x1},
168 {0x0, 0x3, 0x2, 0x1},
169 {0x0, 0x0, 0x0, 0x0},
170 {0x0, 0x3, 0x2, 0x1},
171 {0x0, 0x3, 0x2, 0x1}, /* LDO25 */
172 {0x0, 0x3, 0x2, 0x1},
173 {0x0, 0x3, 0x2, 0x1},
174 {0x0, 0x3, 0x2, 0x1}, /* LDO28 */
175
176 /* BUCK1 ... BUCK9 */
177 {0x0, 0x3, 0x1, 0x1}, /* BUCK1 */
178 {0x0, 0x3, 0x1, 0x1},
179 {0x0, 0x3, 0x1, 0x1},
180 {0x0, 0x3, 0x1, 0x1},
181 {0x0, 0x3, 0x2, 0x1}, /* BUCK5 */
182 {0x0, 0x3, 0x1, 0x1},
183 {0x0, 0x3, 0x1, 0x1},
184 {0x0, 0x3, 0x1, 0x1},
185 {0x0, 0x3, 0x1, 0x1}, /* BUCK9 */
186};
187
188static int s5m8767_get_register(struct regulator_dev *rdev, int *reg,
189 int *enable_ctrl)
190{
191 int reg_id = rdev_get_id(rdev);
192 unsigned int mode;
193 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
194
195 switch (reg_id) {
196 case S5M8767_LDO1 ... S5M8767_LDO2:
197 *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
198 break;
199 case S5M8767_LDO3 ... S5M8767_LDO28:
200 *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
201 break;
202 case S5M8767_BUCK1:
203 *reg = S5M8767_REG_BUCK1CTRL1;
204 break;
205 case S5M8767_BUCK2 ... S5M8767_BUCK4:
206 *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9;
207 break;
208 case S5M8767_BUCK5:
209 *reg = S5M8767_REG_BUCK5CTRL1;
210 break;
211 case S5M8767_BUCK6 ... S5M8767_BUCK9:
212 *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2;
213 break;
214 default:
215 return -EINVAL;
216 }
217
218 mode = s5m8767->opmode[reg_id].mode;
219 *enable_ctrl = s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT;
220 return 0;
221}
222
223static int s5m8767_reg_is_enabled(struct regulator_dev *rdev)
224{
225 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
226 int ret, reg;
227 int mask = 0xc0, enable_ctrl;
228 u8 val;
229
230 ret = s5m8767_get_register(rdev, ®, &enable_ctrl);
231 if (ret == -EINVAL)
232 return 1;
233 else if (ret)
234 return ret;
235
236 ret = s5m_reg_read(s5m8767->iodev, reg, &val);
237 if (ret)
238 return ret;
239
240 return (val & mask) == enable_ctrl;
241}
242
243static int s5m8767_reg_enable(struct regulator_dev *rdev)
244{
245 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
246 int ret, reg;
247 int mask = 0xc0, enable_ctrl;
248
249 ret = s5m8767_get_register(rdev, ®, &enable_ctrl);
250 if (ret)
251 return ret;
252
253 return s5m_reg_update(s5m8767->iodev, reg, enable_ctrl, mask);
254}
255
256static int s5m8767_reg_disable(struct regulator_dev *rdev)
257{
258 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
259 int ret, reg;
260 int mask = 0xc0, enable_ctrl;
261
262 ret = s5m8767_get_register(rdev, ®, &enable_ctrl);
263 if (ret)
264 return ret;
265
266 return s5m_reg_update(s5m8767->iodev, reg, ~mask, mask);
267}
268
269static int s5m8767_get_voltage_register(struct regulator_dev *rdev, int *_reg)
270{
271 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
272 int reg_id = rdev_get_id(rdev);
273 int reg;
274
275 switch (reg_id) {
276 case S5M8767_LDO1 ... S5M8767_LDO2:
277 reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
278 break;
279 case S5M8767_LDO3 ... S5M8767_LDO28:
280 reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
281 break;
282 case S5M8767_BUCK1:
283 reg = S5M8767_REG_BUCK1CTRL2;
284 break;
285 case S5M8767_BUCK2:
286 reg = S5M8767_REG_BUCK2DVS1;
287 if (s5m8767->buck2_gpiodvs)
288 reg += s5m8767->buck_gpioindex;
289 break;
290 case S5M8767_BUCK3:
291 reg = S5M8767_REG_BUCK3DVS1;
292 if (s5m8767->buck3_gpiodvs)
293 reg += s5m8767->buck_gpioindex;
294 break;
295 case S5M8767_BUCK4:
296 reg = S5M8767_REG_BUCK4DVS1;
297 if (s5m8767->buck4_gpiodvs)
298 reg += s5m8767->buck_gpioindex;
299 break;
300 case S5M8767_BUCK5:
301 reg = S5M8767_REG_BUCK5CTRL2;
302 break;
303 case S5M8767_BUCK6 ... S5M8767_BUCK9:
304 reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
305 break;
306 default:
307 return -EINVAL;
308 }
309
310 *_reg = reg;
311
312 return 0;
313}
314
315static int s5m8767_get_voltage_sel(struct regulator_dev *rdev)
316{
317 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
318 int reg, mask, ret;
319 int reg_id = rdev_get_id(rdev);
320 u8 val;
321
322 ret = s5m8767_get_voltage_register(rdev, ®);
323 if (ret)
324 return ret;
325
326 mask = (reg_id < S5M8767_BUCK1) ? 0x3f : 0xff;
327
328 ret = s5m_reg_read(s5m8767->iodev, reg, &val);
329 if (ret)
330 return ret;
331
332 val &= mask;
333
334 return val;
335}
336
337static int s5m8767_convert_voltage_to_sel(
338 const struct s5m_voltage_desc *desc,
339 int min_vol, int max_vol)
340{
341 int selector = 0;
342
343 if (desc == NULL)
344 return -EINVAL;
345
346 if (max_vol < desc->min || min_vol > desc->max)
347 return -EINVAL;
348
349 if (min_vol < desc->min)
350 min_vol = desc->min;
351
352 selector = DIV_ROUND_UP(min_vol - desc->min, desc->step);
353
354 if (desc->min + desc->step * selector > max_vol)
355 return -EINVAL;
356
357 return selector;
358}
359
360static inline void s5m8767_set_high(struct s5m8767_info *s5m8767)
361{
362 int temp_index = s5m8767->buck_gpioindex;
363
364 gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
365 gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
366 gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
367}
368
369static inline void s5m8767_set_low(struct s5m8767_info *s5m8767)
370{
371 int temp_index = s5m8767->buck_gpioindex;
372
373 gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
374 gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
375 gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
376}
377
378static int s5m8767_set_voltage(struct regulator_dev *rdev,
379 int min_uV, int max_uV, unsigned *selector)
380{
381 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
382 const struct s5m_voltage_desc *desc;
383 int reg_id = rdev_get_id(rdev);
384 int sel, reg, mask, ret = 0, old_index, index = 0;
385 u8 val;
386 u8 *buck234_vol = NULL;
387
388 switch (reg_id) {
389 case S5M8767_LDO1 ... S5M8767_LDO28:
390 mask = 0x3f;
391 break;
392 case S5M8767_BUCK1 ... S5M8767_BUCK6:
393 mask = 0xff;
394 if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs)
395 buck234_vol = &s5m8767->buck2_vol[0];
396 else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs)
397 buck234_vol = &s5m8767->buck3_vol[0];
398 else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs)
399 buck234_vol = &s5m8767->buck4_vol[0];
400 break;
401 case S5M8767_BUCK7 ... S5M8767_BUCK8:
402 return -EINVAL;
403 case S5M8767_BUCK9:
404 mask = 0xff;
405 break;
406 default:
407 return -EINVAL;
408 }
409
410 desc = reg_voltage_map[reg_id];
411
412 sel = s5m8767_convert_voltage_to_sel(desc, min_uV, max_uV);
413 if (sel < 0)
414 return sel;
415
416 /* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */
417 if (buck234_vol) {
418 while (*buck234_vol != sel) {
419 buck234_vol++;
420 index++;
421 }
422 old_index = s5m8767->buck_gpioindex;
423 s5m8767->buck_gpioindex = index;
424
425 if (index > old_index)
426 s5m8767_set_high(s5m8767);
427 else
428 s5m8767_set_low(s5m8767);
429 } else {
430 ret = s5m8767_get_voltage_register(rdev, ®);
431 if (ret)
432 return ret;
433
434 s5m_reg_read(s5m8767->iodev, reg, &val);
435 val = (val & ~mask) | sel;
436
437 ret = s5m_reg_write(s5m8767->iodev, reg, val);
438 }
439
440 *selector = sel;
441 return ret;
442}
443
444static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
445 unsigned int old_sel,
446 unsigned int new_sel)
447{
448 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
449 const struct s5m_voltage_desc *desc;
450 int reg_id = rdev_get_id(rdev);
451
452 desc = reg_voltage_map[reg_id];
453
454 if ((old_sel < new_sel) && s5m8767->ramp_delay)
455 return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
456 s5m8767->ramp_delay * 1000);
457 return 0;
458}
459
460static struct regulator_ops s5m8767_ops = {
461 .list_voltage = s5m8767_list_voltage,
462 .is_enabled = s5m8767_reg_is_enabled,
463 .enable = s5m8767_reg_enable,
464 .disable = s5m8767_reg_disable,
465 .get_voltage_sel = s5m8767_get_voltage_sel,
466 .set_voltage = s5m8767_set_voltage,
467 .set_voltage_time_sel = s5m8767_set_voltage_time_sel,
468};
469
470#define s5m8767_regulator_desc(_name) { \
471 .name = #_name, \
472 .id = S5M8767_##_name, \
473 .ops = &s5m8767_ops, \
474 .type = REGULATOR_VOLTAGE, \
475 .owner = THIS_MODULE, \
476}
477
478static struct regulator_desc regulators[] = {
479 s5m8767_regulator_desc(LDO1),
480 s5m8767_regulator_desc(LDO2),
481 s5m8767_regulator_desc(LDO3),
482 s5m8767_regulator_desc(LDO4),
483 s5m8767_regulator_desc(LDO5),
484 s5m8767_regulator_desc(LDO6),
485 s5m8767_regulator_desc(LDO7),
486 s5m8767_regulator_desc(LDO8),
487 s5m8767_regulator_desc(LDO9),
488 s5m8767_regulator_desc(LDO10),
489 s5m8767_regulator_desc(LDO11),
490 s5m8767_regulator_desc(LDO12),
491 s5m8767_regulator_desc(LDO13),
492 s5m8767_regulator_desc(LDO14),
493 s5m8767_regulator_desc(LDO15),
494 s5m8767_regulator_desc(LDO16),
495 s5m8767_regulator_desc(LDO17),
496 s5m8767_regulator_desc(LDO18),
497 s5m8767_regulator_desc(LDO19),
498 s5m8767_regulator_desc(LDO20),
499 s5m8767_regulator_desc(LDO21),
500 s5m8767_regulator_desc(LDO22),
501 s5m8767_regulator_desc(LDO23),
502 s5m8767_regulator_desc(LDO24),
503 s5m8767_regulator_desc(LDO25),
504 s5m8767_regulator_desc(LDO26),
505 s5m8767_regulator_desc(LDO27),
506 s5m8767_regulator_desc(LDO28),
507 s5m8767_regulator_desc(BUCK1),
508 s5m8767_regulator_desc(BUCK2),
509 s5m8767_regulator_desc(BUCK3),
510 s5m8767_regulator_desc(BUCK4),
511 s5m8767_regulator_desc(BUCK5),
512 s5m8767_regulator_desc(BUCK6),
513 s5m8767_regulator_desc(BUCK7),
514 s5m8767_regulator_desc(BUCK8),
515 s5m8767_regulator_desc(BUCK9),
516};
517
518static __devinit int s5m8767_pmic_probe(struct platform_device *pdev)
519{
520 struct s5m87xx_dev *iodev = dev_get_drvdata(pdev->dev.parent);
521 struct s5m_platform_data *pdata = dev_get_platdata(iodev->dev);
522 struct regulator_config config = { };
523 struct regulator_dev **rdev;
524 struct s5m8767_info *s5m8767;
525 int i, ret, size;
526
527 if (!pdata) {
528 dev_err(pdev->dev.parent, "Platform data not supplied\n");
529 return -ENODEV;
530 }
531
532 if (pdata->buck2_gpiodvs) {
533 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
534 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
535 return -EINVAL;
536 }
537 }
538
539 if (pdata->buck3_gpiodvs) {
540 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
541 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
542 return -EINVAL;
543 }
544 }
545
546 if (pdata->buck4_gpiodvs) {
547 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
548 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
549 return -EINVAL;
550 }
551 }
552
553 s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
554 GFP_KERNEL);
555 if (!s5m8767)
556 return -ENOMEM;
557
558 size = sizeof(struct regulator_dev *) * (S5M8767_REG_MAX - 2);
559 s5m8767->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
560 if (!s5m8767->rdev)
561 return -ENOMEM;
562
563 rdev = s5m8767->rdev;
564 s5m8767->dev = &pdev->dev;
565 s5m8767->iodev = iodev;
566 s5m8767->num_regulators = S5M8767_REG_MAX - 2;
567 platform_set_drvdata(pdev, s5m8767);
568
569 s5m8767->buck_gpioindex = pdata->buck_default_idx;
570 s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
571 s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
572 s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
573 s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
574 s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
575 s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
576 s5m8767->ramp_delay = pdata->buck_ramp_delay;
577 s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
578 s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
579 s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
580 s5m8767->opmode = pdata->opmode;
581
582 for (i = 0; i < 8; i++) {
583 if (s5m8767->buck2_gpiodvs) {
584 s5m8767->buck2_vol[i] =
585 s5m8767_convert_voltage_to_sel(
586 &buck_voltage_val2,
587 pdata->buck2_voltage[i],
588 pdata->buck2_voltage[i] +
589 buck_voltage_val2.step);
590 }
591
592 if (s5m8767->buck3_gpiodvs) {
593 s5m8767->buck3_vol[i] =
594 s5m8767_convert_voltage_to_sel(
595 &buck_voltage_val2,
596 pdata->buck3_voltage[i],
597 pdata->buck3_voltage[i] +
598 buck_voltage_val2.step);
599 }
600
601 if (s5m8767->buck4_gpiodvs) {
602 s5m8767->buck4_vol[i] =
603 s5m8767_convert_voltage_to_sel(
604 &buck_voltage_val2,
605 pdata->buck4_voltage[i],
606 pdata->buck4_voltage[i] +
607 buck_voltage_val2.step);
608 }
609 }
610
611 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
612 pdata->buck4_gpiodvs) {
613 if (gpio_is_valid(pdata->buck_gpios[0]) &&
614 gpio_is_valid(pdata->buck_gpios[1]) &&
615 gpio_is_valid(pdata->buck_gpios[2])) {
616 ret = gpio_request(pdata->buck_gpios[0],
617 "S5M8767 SET1");
618 if (ret == -EBUSY)
619 dev_warn(&pdev->dev, "Duplicated gpio request for SET1\n");
620
621 ret = gpio_request(pdata->buck_gpios[1],
622 "S5M8767 SET2");
623 if (ret == -EBUSY)
624 dev_warn(&pdev->dev, "Duplicated gpio request for SET2\n");
625
626 ret = gpio_request(pdata->buck_gpios[2],
627 "S5M8767 SET3");
628 if (ret == -EBUSY)
629 dev_warn(&pdev->dev, "Duplicated gpio request for SET3\n");
630 /* SET1 GPIO */
631 gpio_direction_output(pdata->buck_gpios[0],
632 (s5m8767->buck_gpioindex >> 2) & 0x1);
633 /* SET2 GPIO */
634 gpio_direction_output(pdata->buck_gpios[1],
635 (s5m8767->buck_gpioindex >> 1) & 0x1);
636 /* SET3 GPIO */
637 gpio_direction_output(pdata->buck_gpios[2],
638 (s5m8767->buck_gpioindex >> 0) & 0x1);
639 ret = 0;
640 } else {
641 dev_err(&pdev->dev, "GPIO NOT VALID\n");
642 ret = -EINVAL;
643 return ret;
644 }
645 }
646
647 s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK2CTRL,
648 (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1);
649 s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK3CTRL,
650 (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1);
651 s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK4CTRL,
652 (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1);
653
654 /* Initialize GPIO DVS registers */
655 for (i = 0; i < 8; i++) {
656 if (s5m8767->buck2_gpiodvs) {
657 s5m_reg_write(s5m8767->iodev, S5M8767_REG_BUCK2DVS1 + i,
658 s5m8767->buck2_vol[i]);
659 }
660
661 if (s5m8767->buck3_gpiodvs) {
662 s5m_reg_write(s5m8767->iodev, S5M8767_REG_BUCK3DVS1 + i,
663 s5m8767->buck3_vol[i]);
664 }
665
666 if (s5m8767->buck4_gpiodvs) {
667 s5m_reg_write(s5m8767->iodev, S5M8767_REG_BUCK4DVS1 + i,
668 s5m8767->buck4_vol[i]);
669 }
670 }
671 s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK2CTRL, 0x78, 0xff);
672 s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK3CTRL, 0x58, 0xff);
673 s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK4CTRL, 0x78, 0xff);
674
675 if (s5m8767->buck2_ramp)
676 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x08, 0x08);
677
678 if (s5m8767->buck3_ramp)
679 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x04, 0x04);
680
681 if (s5m8767->buck4_ramp)
682 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x02, 0x02);
683
684 if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
685 || s5m8767->buck4_ramp) {
686 switch (s5m8767->ramp_delay) {
687 case 15:
688 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
689 0xc0, 0xf0);
690 break;
691 case 25:
692 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
693 0xd0, 0xf0);
694 break;
695 case 50:
696 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
697 0xe0, 0xf0);
698 break;
699 case 100:
700 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
701 0xf0, 0xf0);
702 break;
703 default:
704 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
705 0x90, 0xf0);
706 }
707 }
708
709 for (i = 0; i < pdata->num_regulators; i++) {
710 const struct s5m_voltage_desc *desc;
711 int id = pdata->regulators[i].id;
712
713 desc = reg_voltage_map[id];
714 if (desc)
715 regulators[id].n_voltages =
716 (desc->max - desc->min) / desc->step + 1;
717
718 config.dev = s5m8767->dev;
719 config.init_data = pdata->regulators[i].initdata;
720 config.driver_data = s5m8767;
721
722 rdev[i] = regulator_register(®ulators[id], &config);
723 if (IS_ERR(rdev[i])) {
724 ret = PTR_ERR(rdev[i]);
725 dev_err(s5m8767->dev, "regulator init failed for %d\n",
726 id);
727 rdev[i] = NULL;
728 goto err;
729 }
730 }
731
732 return 0;
733err:
734 for (i = 0; i < s5m8767->num_regulators; i++)
735 if (rdev[i])
736 regulator_unregister(rdev[i]);
737
738 return ret;
739}
740
741static int __devexit s5m8767_pmic_remove(struct platform_device *pdev)
742{
743 struct s5m8767_info *s5m8767 = platform_get_drvdata(pdev);
744 struct regulator_dev **rdev = s5m8767->rdev;
745 int i;
746
747 for (i = 0; i < s5m8767->num_regulators; i++)
748 if (rdev[i])
749 regulator_unregister(rdev[i]);
750
751 return 0;
752}
753
754static const struct platform_device_id s5m8767_pmic_id[] = {
755 { "s5m8767-pmic", 0},
756 { },
757};
758MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
759
760static struct platform_driver s5m8767_pmic_driver = {
761 .driver = {
762 .name = "s5m8767-pmic",
763 .owner = THIS_MODULE,
764 },
765 .probe = s5m8767_pmic_probe,
766 .remove = __devexit_p(s5m8767_pmic_remove),
767 .id_table = s5m8767_pmic_id,
768};
769
770static int __init s5m8767_pmic_init(void)
771{
772 return platform_driver_register(&s5m8767_pmic_driver);
773}
774subsys_initcall(s5m8767_pmic_init);
775
776static void __exit s5m8767_pmic_exit(void)
777{
778 platform_driver_unregister(&s5m8767_pmic_driver);
779}
780module_exit(s5m8767_pmic_exit);
781
782/* Module information */
783MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
784MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
785MODULE_LICENSE("GPL");