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thp: avoid dumping huge zero page
[linux-2.6/libata-dev.git] / drivers / regulator / s5m8767.c
blob33b65c9ad5d5be4da31d725678faeb7c5dc2b031
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/samsung/core.h>
23 #include <linux/mfd/samsung/s5m8767.h>
24
25 struct s5m8767_info {
26 struct device *dev;
27 struct sec_pmic_dev *iodev;
28 int num_regulators;
29 struct regulator_dev **rdev;
30 struct sec_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_ds[3];
45 int buck_gpioindex;
46 };
47
48 struct sec_voltage_desc {
49 int max;
50 int min;
51 int step;
52 };
53
54 static const struct sec_voltage_desc buck_voltage_val1 = {
55 .max = 2225000,
56 .min = 650000,
57 .step = 6250,
58 };
59
60 static const struct sec_voltage_desc buck_voltage_val2 = {
61 .max = 1600000,
62 .min = 600000,
63 .step = 6250,
64 };
65
66 static const struct sec_voltage_desc buck_voltage_val3 = {
67 .max = 3000000,
68 .min = 750000,
69 .step = 12500,
70 };
71
72 static const struct sec_voltage_desc ldo_voltage_val1 = {
73 .max = 3950000,
74 .min = 800000,
75 .step = 50000,
76 };
77
78 static const struct sec_voltage_desc ldo_voltage_val2 = {
79 .max = 2375000,
80 .min = 800000,
81 .step = 25000,
82 };
83
84 static const struct sec_voltage_desc *reg_voltage_map[] = {
85 [S5M8767_LDO1] = &ldo_voltage_val2,
86 [S5M8767_LDO2] = &ldo_voltage_val2,
87 [S5M8767_LDO3] = &ldo_voltage_val1,
88 [S5M8767_LDO4] = &ldo_voltage_val1,
89 [S5M8767_LDO5] = &ldo_voltage_val1,
90 [S5M8767_LDO6] = &ldo_voltage_val2,
91 [S5M8767_LDO7] = &ldo_voltage_val2,
92 [S5M8767_LDO8] = &ldo_voltage_val2,
93 [S5M8767_LDO9] = &ldo_voltage_val1,
94 [S5M8767_LDO10] = &ldo_voltage_val1,
95 [S5M8767_LDO11] = &ldo_voltage_val1,
96 [S5M8767_LDO12] = &ldo_voltage_val1,
97 [S5M8767_LDO13] = &ldo_voltage_val1,
98 [S5M8767_LDO14] = &ldo_voltage_val1,
99 [S5M8767_LDO15] = &ldo_voltage_val2,
100 [S5M8767_LDO16] = &ldo_voltage_val1,
101 [S5M8767_LDO17] = &ldo_voltage_val1,
102 [S5M8767_LDO18] = &ldo_voltage_val1,
103 [S5M8767_LDO19] = &ldo_voltage_val1,
104 [S5M8767_LDO20] = &ldo_voltage_val1,
105 [S5M8767_LDO21] = &ldo_voltage_val1,
106 [S5M8767_LDO22] = &ldo_voltage_val1,
107 [S5M8767_LDO23] = &ldo_voltage_val1,
108 [S5M8767_LDO24] = &ldo_voltage_val1,
109 [S5M8767_LDO25] = &ldo_voltage_val1,
110 [S5M8767_LDO26] = &ldo_voltage_val1,
111 [S5M8767_LDO27] = &ldo_voltage_val1,
112 [S5M8767_LDO28] = &ldo_voltage_val1,
113 [S5M8767_BUCK1] = &buck_voltage_val1,
114 [S5M8767_BUCK2] = &buck_voltage_val2,
115 [S5M8767_BUCK3] = &buck_voltage_val2,
116 [S5M8767_BUCK4] = &buck_voltage_val2,
117 [S5M8767_BUCK5] = &buck_voltage_val1,
118 [S5M8767_BUCK6] = &buck_voltage_val1,
119 [S5M8767_BUCK7] = NULL,
120 [S5M8767_BUCK8] = NULL,
121 [S5M8767_BUCK9] = &buck_voltage_val3,
122 };
123
124 static unsigned int s5m8767_opmode_reg[][4] = {
125 /* {OFF, ON, LOWPOWER, SUSPEND} */
126 /* LDO1 ... LDO28 */
127 {0x0, 0x3, 0x2, 0x1}, /* LDO1 */
128 {0x0, 0x3, 0x2, 0x1},
129 {0x0, 0x3, 0x2, 0x1},
130 {0x0, 0x0, 0x0, 0x0},
131 {0x0, 0x3, 0x2, 0x1}, /* LDO5 */
132 {0x0, 0x3, 0x2, 0x1},
133 {0x0, 0x3, 0x2, 0x1},
134 {0x0, 0x3, 0x2, 0x1},
135 {0x0, 0x3, 0x2, 0x1},
136 {0x0, 0x3, 0x2, 0x1}, /* LDO10 */
137 {0x0, 0x3, 0x2, 0x1},
138 {0x0, 0x3, 0x2, 0x1},
139 {0x0, 0x3, 0x2, 0x1},
140 {0x0, 0x3, 0x2, 0x1},
141 {0x0, 0x3, 0x2, 0x1}, /* LDO15 */
142 {0x0, 0x3, 0x2, 0x1},
143 {0x0, 0x3, 0x2, 0x1},
144 {0x0, 0x0, 0x0, 0x0},
145 {0x0, 0x3, 0x2, 0x1},
146 {0x0, 0x3, 0x2, 0x1}, /* LDO20 */
147 {0x0, 0x3, 0x2, 0x1},
148 {0x0, 0x3, 0x2, 0x1},
149 {0x0, 0x0, 0x0, 0x0},
150 {0x0, 0x3, 0x2, 0x1},
151 {0x0, 0x3, 0x2, 0x1}, /* LDO25 */
152 {0x0, 0x3, 0x2, 0x1},
153 {0x0, 0x3, 0x2, 0x1},
154 {0x0, 0x3, 0x2, 0x1}, /* LDO28 */
155
156 /* BUCK1 ... BUCK9 */
157 {0x0, 0x3, 0x1, 0x1}, /* BUCK1 */
158 {0x0, 0x3, 0x1, 0x1},
159 {0x0, 0x3, 0x1, 0x1},
160 {0x0, 0x3, 0x1, 0x1},
161 {0x0, 0x3, 0x2, 0x1}, /* BUCK5 */
162 {0x0, 0x3, 0x1, 0x1},
163 {0x0, 0x3, 0x1, 0x1},
164 {0x0, 0x3, 0x1, 0x1},
165 {0x0, 0x3, 0x1, 0x1}, /* BUCK9 */
166 };
167
168 static int s5m8767_get_register(struct regulator_dev *rdev, int *reg,
169 int *enable_ctrl)
170 {
171 int i, reg_id = rdev_get_id(rdev);
172 unsigned int mode;
173 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
174
175 switch (reg_id) {
176 case S5M8767_LDO1 ... S5M8767_LDO2:
177 *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
178 break;
179 case S5M8767_LDO3 ... S5M8767_LDO28:
180 *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
181 break;
182 case S5M8767_BUCK1:
183 *reg = S5M8767_REG_BUCK1CTRL1;
184 break;
185 case S5M8767_BUCK2 ... S5M8767_BUCK4:
186 *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9;
187 break;
188 case S5M8767_BUCK5:
189 *reg = S5M8767_REG_BUCK5CTRL1;
190 break;
191 case S5M8767_BUCK6 ... S5M8767_BUCK9:
192 *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2;
193 break;
194 default:
195 return -EINVAL;
196 }
197
198 for (i = 0; i < s5m8767->num_regulators; i++) {
199 if (s5m8767->opmode[i].id == reg_id) {
200 mode = s5m8767->opmode[i].mode;
201 break;
202 }
203 }
204
205 if (i < s5m8767->num_regulators)
206 *enable_ctrl =
207 s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT;
208
209 return 0;
210 }
211
212 static int s5m8767_reg_is_enabled(struct regulator_dev *rdev)
213 {
214 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
215 int ret, reg;
216 int mask = 0xc0, enable_ctrl;
217 unsigned int val;
218
219 ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
220 if (ret == -EINVAL)
221 return 1;
222 else if (ret)
223 return ret;
224
225 ret = sec_reg_read(s5m8767->iodev, reg, &val);
226 if (ret)
227 return ret;
228
229 return (val & mask) == enable_ctrl;
230 }
231
232 static int s5m8767_reg_enable(struct regulator_dev *rdev)
233 {
234 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
235 int ret, reg;
236 int mask = 0xc0, enable_ctrl;
237
238 ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
239 if (ret)
240 return ret;
241
242 return sec_reg_update(s5m8767->iodev, reg, enable_ctrl, mask);
243 }
244
245 static int s5m8767_reg_disable(struct regulator_dev *rdev)
246 {
247 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
248 int ret, reg;
249 int mask = 0xc0, enable_ctrl;
250
251 ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
252 if (ret)
253 return ret;
254
255 return sec_reg_update(s5m8767->iodev, reg, ~mask, mask);
256 }
257
258 static int s5m8767_get_voltage_register(struct regulator_dev *rdev, int *_reg)
259 {
260 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
261 int reg_id = rdev_get_id(rdev);
262 int reg;
263
264 switch (reg_id) {
265 case S5M8767_LDO1 ... S5M8767_LDO2:
266 reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
267 break;
268 case S5M8767_LDO3 ... S5M8767_LDO28:
269 reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
270 break;
271 case S5M8767_BUCK1:
272 reg = S5M8767_REG_BUCK1CTRL2;
273 break;
274 case S5M8767_BUCK2:
275 reg = S5M8767_REG_BUCK2DVS1;
276 if (s5m8767->buck2_gpiodvs)
277 reg += s5m8767->buck_gpioindex;
278 break;
279 case S5M8767_BUCK3:
280 reg = S5M8767_REG_BUCK3DVS1;
281 if (s5m8767->buck3_gpiodvs)
282 reg += s5m8767->buck_gpioindex;
283 break;
284 case S5M8767_BUCK4:
285 reg = S5M8767_REG_BUCK4DVS1;
286 if (s5m8767->buck4_gpiodvs)
287 reg += s5m8767->buck_gpioindex;
288 break;
289 case S5M8767_BUCK5:
290 reg = S5M8767_REG_BUCK5CTRL2;
291 break;
292 case S5M8767_BUCK6 ... S5M8767_BUCK9:
293 reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
294 break;
295 default:
296 return -EINVAL;
297 }
298
299 *_reg = reg;
300
301 return 0;
302 }
303
304 static int s5m8767_get_voltage_sel(struct regulator_dev *rdev)
305 {
306 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
307 int reg, mask, ret;
308 int reg_id = rdev_get_id(rdev);
309 unsigned int val;
310
311 ret = s5m8767_get_voltage_register(rdev, &reg);
312 if (ret)
313 return ret;
314
315 mask = (reg_id < S5M8767_BUCK1) ? 0x3f : 0xff;
316
317 ret = sec_reg_read(s5m8767->iodev, reg, &val);
318 if (ret)
319 return ret;
320
321 val &= mask;
322
323 return val;
324 }
325
326 static int s5m8767_convert_voltage_to_sel(
327 const struct sec_voltage_desc *desc,
328 int min_vol, int max_vol)
329 {
330 int selector = 0;
331
332 if (desc == NULL)
333 return -EINVAL;
334
335 if (max_vol < desc->min || min_vol > desc->max)
336 return -EINVAL;
337
338 if (min_vol < desc->min)
339 min_vol = desc->min;
340
341 selector = DIV_ROUND_UP(min_vol - desc->min, desc->step);
342
343 if (desc->min + desc->step * selector > max_vol)
344 return -EINVAL;
345
346 return selector;
347 }
348
349 static inline int s5m8767_set_high(struct s5m8767_info *s5m8767)
350 {
351 int temp_index = s5m8767->buck_gpioindex;
352
353 gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
354 gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
355 gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
356
357 return 0;
358 }
359
360 static inline int s5m8767_set_low(struct s5m8767_info *s5m8767)
361 {
362 int temp_index = s5m8767->buck_gpioindex;
363
364 gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
365 gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
366 gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
367
368 return 0;
369 }
370
371 static int s5m8767_set_voltage_sel(struct regulator_dev *rdev,
372 unsigned selector)
373 {
374 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
375 int reg_id = rdev_get_id(rdev);
376 int reg, mask, ret = 0, old_index, index = 0;
377 u8 *buck234_vol = NULL;
378
379 switch (reg_id) {
380 case S5M8767_LDO1 ... S5M8767_LDO28:
381 mask = 0x3f;
382 break;
383 case S5M8767_BUCK1 ... S5M8767_BUCK6:
384 mask = 0xff;
385 if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs)
386 buck234_vol = &s5m8767->buck2_vol[0];
387 else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs)
388 buck234_vol = &s5m8767->buck3_vol[0];
389 else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs)
390 buck234_vol = &s5m8767->buck4_vol[0];
391 break;
392 case S5M8767_BUCK7 ... S5M8767_BUCK8:
393 return -EINVAL;
394 case S5M8767_BUCK9:
395 mask = 0xff;
396 break;
397 default:
398 return -EINVAL;
399 }
400
401 /* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */
402 if (buck234_vol) {
403 while (*buck234_vol != selector) {
404 buck234_vol++;
405 index++;
406 }
407 old_index = s5m8767->buck_gpioindex;
408 s5m8767->buck_gpioindex = index;
409
410 if (index > old_index)
411 return s5m8767_set_high(s5m8767);
412 else
413 return s5m8767_set_low(s5m8767);
414 } else {
415 ret = s5m8767_get_voltage_register(rdev, &reg);
416 if (ret)
417 return ret;
418
419 return sec_reg_update(s5m8767->iodev, reg, selector, mask);
420 }
421 }
422
423 static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
424 unsigned int old_sel,
425 unsigned int new_sel)
426 {
427 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
428 const struct sec_voltage_desc *desc;
429 int reg_id = rdev_get_id(rdev);
430
431 desc = reg_voltage_map[reg_id];
432
433 if ((old_sel < new_sel) && s5m8767->ramp_delay)
434 return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
435 s5m8767->ramp_delay * 1000);
436 return 0;
437 }
438
439 static struct regulator_ops s5m8767_ops = {
440 .list_voltage = regulator_list_voltage_linear,
441 .is_enabled = s5m8767_reg_is_enabled,
442 .enable = s5m8767_reg_enable,
443 .disable = s5m8767_reg_disable,
444 .get_voltage_sel = s5m8767_get_voltage_sel,
445 .set_voltage_sel = s5m8767_set_voltage_sel,
446 .set_voltage_time_sel = s5m8767_set_voltage_time_sel,
447 };
448
449 static struct regulator_ops s5m8767_buck78_ops = {
450 .is_enabled = s5m8767_reg_is_enabled,
451 .enable = s5m8767_reg_enable,
452 .disable = s5m8767_reg_disable,
453 };
454
455 #define s5m8767_regulator_desc(_name) { \
456 .name = #_name, \
457 .id = S5M8767_##_name, \
458 .ops = &s5m8767_ops, \
459 .type = REGULATOR_VOLTAGE, \
460 .owner = THIS_MODULE, \
461 }
462
463 #define s5m8767_regulator_buck78_desc(_name) { \
464 .name = #_name, \
465 .id = S5M8767_##_name, \
466 .ops = &s5m8767_buck78_ops, \
467 .type = REGULATOR_VOLTAGE, \
468 .owner = THIS_MODULE, \
469 }
470
471 static struct regulator_desc regulators[] = {
472 s5m8767_regulator_desc(LDO1),
473 s5m8767_regulator_desc(LDO2),
474 s5m8767_regulator_desc(LDO3),
475 s5m8767_regulator_desc(LDO4),
476 s5m8767_regulator_desc(LDO5),
477 s5m8767_regulator_desc(LDO6),
478 s5m8767_regulator_desc(LDO7),
479 s5m8767_regulator_desc(LDO8),
480 s5m8767_regulator_desc(LDO9),
481 s5m8767_regulator_desc(LDO10),
482 s5m8767_regulator_desc(LDO11),
483 s5m8767_regulator_desc(LDO12),
484 s5m8767_regulator_desc(LDO13),
485 s5m8767_regulator_desc(LDO14),
486 s5m8767_regulator_desc(LDO15),
487 s5m8767_regulator_desc(LDO16),
488 s5m8767_regulator_desc(LDO17),
489 s5m8767_regulator_desc(LDO18),
490 s5m8767_regulator_desc(LDO19),
491 s5m8767_regulator_desc(LDO20),
492 s5m8767_regulator_desc(LDO21),
493 s5m8767_regulator_desc(LDO22),
494 s5m8767_regulator_desc(LDO23),
495 s5m8767_regulator_desc(LDO24),
496 s5m8767_regulator_desc(LDO25),
497 s5m8767_regulator_desc(LDO26),
498 s5m8767_regulator_desc(LDO27),
499 s5m8767_regulator_desc(LDO28),
500 s5m8767_regulator_desc(BUCK1),
501 s5m8767_regulator_desc(BUCK2),
502 s5m8767_regulator_desc(BUCK3),
503 s5m8767_regulator_desc(BUCK4),
504 s5m8767_regulator_desc(BUCK5),
505 s5m8767_regulator_desc(BUCK6),
506 s5m8767_regulator_buck78_desc(BUCK7),
507 s5m8767_regulator_buck78_desc(BUCK8),
508 s5m8767_regulator_desc(BUCK9),
509 };
510
511 static int s5m8767_pmic_probe(struct platform_device *pdev)
512 {
513 struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
514 struct sec_platform_data *pdata = dev_get_platdata(iodev->dev);
515 struct regulator_config config = { };
516 struct regulator_dev **rdev;
517 struct s5m8767_info *s5m8767;
518 int i, ret, size, buck_init;
519
520 if (!pdata) {
521 dev_err(pdev->dev.parent, "Platform data not supplied\n");
522 return -ENODEV;
523 }
524
525 if (pdata->buck2_gpiodvs) {
526 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
527 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
528 return -EINVAL;
529 }
530 }
531
532 if (pdata->buck3_gpiodvs) {
533 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
534 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
535 return -EINVAL;
536 }
537 }
538
539 if (pdata->buck4_gpiodvs) {
540 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
541 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
542 return -EINVAL;
543 }
544 }
545
546 s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
547 GFP_KERNEL);
548 if (!s5m8767)
549 return -ENOMEM;
550
551 size = sizeof(struct regulator_dev *) * (S5M8767_REG_MAX - 2);
552 s5m8767->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
553 if (!s5m8767->rdev)
554 return -ENOMEM;
555
556 rdev = s5m8767->rdev;
557 s5m8767->dev = &pdev->dev;
558 s5m8767->iodev = iodev;
559 s5m8767->num_regulators = pdata->num_regulators;
560 platform_set_drvdata(pdev, s5m8767);
561
562 s5m8767->buck_gpioindex = pdata->buck_default_idx;
563 s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
564 s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
565 s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
566 s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
567 s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
568 s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
569 s5m8767->buck_ds[0] = pdata->buck_ds[0];
570 s5m8767->buck_ds[1] = pdata->buck_ds[1];
571 s5m8767->buck_ds[2] = pdata->buck_ds[2];
572
573 s5m8767->ramp_delay = pdata->buck_ramp_delay;
574 s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
575 s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
576 s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
577 s5m8767->opmode = pdata->opmode;
578
579 buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
580 pdata->buck2_init,
581 pdata->buck2_init +
582 buck_voltage_val2.step);
583
584 sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK2DVS2, buck_init);
585
586 buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
587 pdata->buck3_init,
588 pdata->buck3_init +
589 buck_voltage_val2.step);
590
591 sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK3DVS2, buck_init);
592
593 buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
594 pdata->buck4_init,
595 pdata->buck4_init +
596 buck_voltage_val2.step);
597
598 sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK4DVS2, buck_init);
599
600 for (i = 0; i < 8; i++) {
601 if (s5m8767->buck2_gpiodvs) {
602 s5m8767->buck2_vol[i] =
603 s5m8767_convert_voltage_to_sel(
604 &buck_voltage_val2,
605 pdata->buck2_voltage[i],
606 pdata->buck2_voltage[i] +
607 buck_voltage_val2.step);
608 }
609
610 if (s5m8767->buck3_gpiodvs) {
611 s5m8767->buck3_vol[i] =
612 s5m8767_convert_voltage_to_sel(
613 &buck_voltage_val2,
614 pdata->buck3_voltage[i],
615 pdata->buck3_voltage[i] +
616 buck_voltage_val2.step);
617 }
618
619 if (s5m8767->buck4_gpiodvs) {
620 s5m8767->buck4_vol[i] =
621 s5m8767_convert_voltage_to_sel(
622 &buck_voltage_val2,
623 pdata->buck4_voltage[i],
624 pdata->buck4_voltage[i] +
625 buck_voltage_val2.step);
626 }
627 }
628
629 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
630 pdata->buck4_gpiodvs) {
631
632 if (!gpio_is_valid(pdata->buck_gpios[0]) ||
633 !gpio_is_valid(pdata->buck_gpios[1]) ||
634 !gpio_is_valid(pdata->buck_gpios[2])) {
635 dev_err(&pdev->dev, "GPIO NOT VALID\n");
636 return -EINVAL;
637 }
638
639 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
640 "S5M8767 SET1");
641 if (ret)
642 return ret;
643
644 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
645 "S5M8767 SET2");
646 if (ret)
647 return ret;
648
649 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
650 "S5M8767 SET3");
651 if (ret)
652 return ret;
653
654 /* SET1 GPIO */
655 gpio_direction_output(pdata->buck_gpios[0],
656 (s5m8767->buck_gpioindex >> 2) & 0x1);
657 /* SET2 GPIO */
658 gpio_direction_output(pdata->buck_gpios[1],
659 (s5m8767->buck_gpioindex >> 1) & 0x1);
660 /* SET3 GPIO */
661 gpio_direction_output(pdata->buck_gpios[2],
662 (s5m8767->buck_gpioindex >> 0) & 0x1);
663 }
664
665 ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
666 if (ret)
667 return ret;
668
669 ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
670 if (ret)
671 return ret;
672
673 ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
674 if (ret)
675 return ret;
676
677 /* DS2 GPIO */
678 gpio_direction_output(pdata->buck_ds[0], 0x0);
679 /* DS3 GPIO */
680 gpio_direction_output(pdata->buck_ds[1], 0x0);
681 /* DS4 GPIO */
682 gpio_direction_output(pdata->buck_ds[2], 0x0);
683
684 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
685 pdata->buck4_gpiodvs) {
686 sec_reg_update(s5m8767->iodev, S5M8767_REG_BUCK2CTRL,
687 (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1),
688 1 << 1);
689 sec_reg_update(s5m8767->iodev, S5M8767_REG_BUCK3CTRL,
690 (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1),
691 1 << 1);
692 sec_reg_update(s5m8767->iodev, S5M8767_REG_BUCK4CTRL,
693 (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1),
694 1 << 1);
695 }
696
697 /* Initialize GPIO DVS registers */
698 for (i = 0; i < 8; i++) {
699 if (s5m8767->buck2_gpiodvs) {
700 sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK2DVS1 + i,
701 s5m8767->buck2_vol[i]);
702 }
703
704 if (s5m8767->buck3_gpiodvs) {
705 sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK3DVS1 + i,
706 s5m8767->buck3_vol[i]);
707 }
708
709 if (s5m8767->buck4_gpiodvs) {
710 sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK4DVS1 + i,
711 s5m8767->buck4_vol[i]);
712 }
713 }
714
715 if (s5m8767->buck2_ramp)
716 sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x08, 0x08);
717
718 if (s5m8767->buck3_ramp)
719 sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x04, 0x04);
720
721 if (s5m8767->buck4_ramp)
722 sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x02, 0x02);
723
724 if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
725 || s5m8767->buck4_ramp) {
726 switch (s5m8767->ramp_delay) {
727 case 5:
728 sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
729 0x40, 0xf0);
730 break;
731 case 10:
732 sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
733 0x90, 0xf0);
734 break;
735 case 25:
736 sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
737 0xd0, 0xf0);
738 break;
739 case 50:
740 sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
741 0xe0, 0xf0);
742 break;
743 case 100:
744 sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
745 0xf0, 0xf0);
746 break;
747 default:
748 sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
749 0x90, 0xf0);
750 }
751 }
752
753 for (i = 0; i < pdata->num_regulators; i++) {
754 const struct sec_voltage_desc *desc;
755 int id = pdata->regulators[i].id;
756
757 desc = reg_voltage_map[id];
758 if (desc) {
759 regulators[id].n_voltages =
760 (desc->max - desc->min) / desc->step + 1;
761 regulators[id].min_uV = desc->min;
762 regulators[id].uV_step = desc->step;
763 }
764
765 config.dev = s5m8767->dev;
766 config.init_data = pdata->regulators[i].initdata;
767 config.driver_data = s5m8767;
768
769 rdev[i] = regulator_register(&regulators[id], &config);
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 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 = 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 2.6 libata-dev (mirror)