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hfs: get rid of hfs_sync_super
[linux/fpc-iii.git] / drivers / regulator / max8998.c
blob18bb58b9b96e04836464f86e345310ba1f86227a
1 /*
2 * max8998.c - Voltage regulator driver for the Maxim 8998
3 *
4 * Copyright (C) 2009-2010 Samsung Electronics
5 * Kyungmin Park <kyungmin.park@samsung.com>
6 * Marek Szyprowski <m.szyprowski@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23 #include <linux/module.h>
24 #include <linux/init.h>
25 #include <linux/i2c.h>
26 #include <linux/err.h>
27 #include <linux/gpio.h>
28 #include <linux/slab.h>
29 #include <linux/interrupt.h>
30 #include <linux/mutex.h>
31 #include <linux/platform_device.h>
32 #include <linux/regulator/driver.h>
33 #include <linux/mfd/max8998.h>
34 #include <linux/mfd/max8998-private.h>
35
36 struct max8998_data {
37 struct device *dev;
38 struct max8998_dev *iodev;
39 int num_regulators;
40 struct regulator_dev **rdev;
41 u8 buck1_vol[4]; /* voltages for selection */
42 u8 buck2_vol[2];
43 unsigned int buck1_idx; /* index to last changed voltage */
44 /* value in a set */
45 unsigned int buck2_idx;
46 };
47
48 struct voltage_map_desc {
49 int min;
50 int max;
51 int step;
52 };
53
54 /* Voltage maps */
55 static const struct voltage_map_desc ldo23_voltage_map_desc = {
56 .min = 800, .step = 50, .max = 1300,
57 };
58 static const struct voltage_map_desc ldo456711_voltage_map_desc = {
59 .min = 1600, .step = 100, .max = 3600,
60 };
61 static const struct voltage_map_desc ldo8_voltage_map_desc = {
62 .min = 3000, .step = 100, .max = 3600,
63 };
64 static const struct voltage_map_desc ldo9_voltage_map_desc = {
65 .min = 2800, .step = 100, .max = 3100,
66 };
67 static const struct voltage_map_desc ldo10_voltage_map_desc = {
68 .min = 950, .step = 50, .max = 1300,
69 };
70 static const struct voltage_map_desc ldo1213_voltage_map_desc = {
71 .min = 800, .step = 100, .max = 3300,
72 };
73 static const struct voltage_map_desc ldo1415_voltage_map_desc = {
74 .min = 1200, .step = 100, .max = 3300,
75 };
76 static const struct voltage_map_desc ldo1617_voltage_map_desc = {
77 .min = 1600, .step = 100, .max = 3600,
78 };
79 static const struct voltage_map_desc buck12_voltage_map_desc = {
80 .min = 750, .step = 25, .max = 1525,
81 };
82 static const struct voltage_map_desc buck3_voltage_map_desc = {
83 .min = 1600, .step = 100, .max = 3600,
84 };
85 static const struct voltage_map_desc buck4_voltage_map_desc = {
86 .min = 800, .step = 100, .max = 2300,
87 };
88
89 static const struct voltage_map_desc *ldo_voltage_map[] = {
90 NULL,
91 NULL,
92 &ldo23_voltage_map_desc, /* LDO2 */
93 &ldo23_voltage_map_desc, /* LDO3 */
94 &ldo456711_voltage_map_desc, /* LDO4 */
95 &ldo456711_voltage_map_desc, /* LDO5 */
96 &ldo456711_voltage_map_desc, /* LDO6 */
97 &ldo456711_voltage_map_desc, /* LDO7 */
98 &ldo8_voltage_map_desc, /* LDO8 */
99 &ldo9_voltage_map_desc, /* LDO9 */
100 &ldo10_voltage_map_desc, /* LDO10 */
101 &ldo456711_voltage_map_desc, /* LDO11 */
102 &ldo1213_voltage_map_desc, /* LDO12 */
103 &ldo1213_voltage_map_desc, /* LDO13 */
104 &ldo1415_voltage_map_desc, /* LDO14 */
105 &ldo1415_voltage_map_desc, /* LDO15 */
106 &ldo1617_voltage_map_desc, /* LDO16 */
107 &ldo1617_voltage_map_desc, /* LDO17 */
108 &buck12_voltage_map_desc, /* BUCK1 */
109 &buck12_voltage_map_desc, /* BUCK2 */
110 &buck3_voltage_map_desc, /* BUCK3 */
111 &buck4_voltage_map_desc, /* BUCK4 */
112 };
113
114 static int max8998_list_voltage(struct regulator_dev *rdev,
115 unsigned int selector)
116 {
117 const struct voltage_map_desc *desc;
118 int ldo = rdev_get_id(rdev);
119 int val;
120
121 if (ldo >= ARRAY_SIZE(ldo_voltage_map))
122 return -EINVAL;
123
124 desc = ldo_voltage_map[ldo];
125 if (desc == NULL)
126 return -EINVAL;
127
128 val = desc->min + desc->step * selector;
129 if (val > desc->max)
130 return -EINVAL;
131
132 return val * 1000;
133 }
134
135 static int max8998_get_enable_register(struct regulator_dev *rdev,
136 int *reg, int *shift)
137 {
138 int ldo = rdev_get_id(rdev);
139
140 switch (ldo) {
141 case MAX8998_LDO2 ... MAX8998_LDO5:
142 *reg = MAX8998_REG_ONOFF1;
143 *shift = 3 - (ldo - MAX8998_LDO2);
144 break;
145 case MAX8998_LDO6 ... MAX8998_LDO13:
146 *reg = MAX8998_REG_ONOFF2;
147 *shift = 7 - (ldo - MAX8998_LDO6);
148 break;
149 case MAX8998_LDO14 ... MAX8998_LDO17:
150 *reg = MAX8998_REG_ONOFF3;
151 *shift = 7 - (ldo - MAX8998_LDO14);
152 break;
153 case MAX8998_BUCK1 ... MAX8998_BUCK4:
154 *reg = MAX8998_REG_ONOFF1;
155 *shift = 7 - (ldo - MAX8998_BUCK1);
156 break;
157 case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG:
158 *reg = MAX8998_REG_ONOFF4;
159 *shift = 7 - (ldo - MAX8998_EN32KHZ_AP);
160 break;
161 case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2:
162 *reg = MAX8998_REG_CHGR2;
163 *shift = 7 - (ldo - MAX8998_ESAFEOUT1);
164 break;
165 default:
166 return -EINVAL;
167 }
168
169 return 0;
170 }
171
172 static int max8998_ldo_is_enabled(struct regulator_dev *rdev)
173 {
174 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
175 struct i2c_client *i2c = max8998->iodev->i2c;
176 int ret, reg, shift = 8;
177 u8 val;
178
179 ret = max8998_get_enable_register(rdev, &reg, &shift);
180 if (ret)
181 return ret;
182
183 ret = max8998_read_reg(i2c, reg, &val);
184 if (ret)
185 return ret;
186
187 return val & (1 << shift);
188 }
189
190 static int max8998_ldo_enable(struct regulator_dev *rdev)
191 {
192 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
193 struct i2c_client *i2c = max8998->iodev->i2c;
194 int reg, shift = 8, ret;
195
196 ret = max8998_get_enable_register(rdev, &reg, &shift);
197 if (ret)
198 return ret;
199
200 return max8998_update_reg(i2c, reg, 1<<shift, 1<<shift);
201 }
202
203 static int max8998_ldo_disable(struct regulator_dev *rdev)
204 {
205 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
206 struct i2c_client *i2c = max8998->iodev->i2c;
207 int reg, shift = 8, ret;
208
209 ret = max8998_get_enable_register(rdev, &reg, &shift);
210 if (ret)
211 return ret;
212
213 return max8998_update_reg(i2c, reg, 0, 1<<shift);
214 }
215
216 static int max8998_get_voltage_register(struct regulator_dev *rdev,
217 int *_reg, int *_shift, int *_mask)
218 {
219 int ldo = rdev_get_id(rdev);
220 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
221 int reg, shift = 0, mask = 0xff;
222
223 switch (ldo) {
224 case MAX8998_LDO2 ... MAX8998_LDO3:
225 reg = MAX8998_REG_LDO2_LDO3;
226 mask = 0xf;
227 if (ldo == MAX8998_LDO2)
228 shift = 4;
229 else
230 shift = 0;
231 break;
232 case MAX8998_LDO4 ... MAX8998_LDO7:
233 reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4);
234 break;
235 case MAX8998_LDO8 ... MAX8998_LDO9:
236 reg = MAX8998_REG_LDO8_LDO9;
237 mask = 0xf;
238 if (ldo == MAX8998_LDO8)
239 shift = 4;
240 else
241 shift = 0;
242 break;
243 case MAX8998_LDO10 ... MAX8998_LDO11:
244 reg = MAX8998_REG_LDO10_LDO11;
245 if (ldo == MAX8998_LDO10) {
246 shift = 5;
247 mask = 0x7;
248 } else {
249 shift = 0;
250 mask = 0x1f;
251 }
252 break;
253 case MAX8998_LDO12 ... MAX8998_LDO17:
254 reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12);
255 break;
256 case MAX8998_BUCK1:
257 reg = MAX8998_REG_BUCK1_VOLTAGE1 + max8998->buck1_idx;
258 break;
259 case MAX8998_BUCK2:
260 reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx;
261 break;
262 case MAX8998_BUCK3:
263 reg = MAX8998_REG_BUCK3;
264 break;
265 case MAX8998_BUCK4:
266 reg = MAX8998_REG_BUCK4;
267 break;
268 default:
269 return -EINVAL;
270 }
271
272 *_reg = reg;
273 *_shift = shift;
274 *_mask = mask;
275
276 return 0;
277 }
278
279 static int max8998_get_voltage_sel(struct regulator_dev *rdev)
280 {
281 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
282 struct i2c_client *i2c = max8998->iodev->i2c;
283 int reg, shift = 0, mask, ret;
284 u8 val;
285
286 ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
287 if (ret)
288 return ret;
289
290 ret = max8998_read_reg(i2c, reg, &val);
291 if (ret)
292 return ret;
293
294 val >>= shift;
295 val &= mask;
296
297 return val;
298 }
299
300 static int max8998_set_voltage_ldo(struct regulator_dev *rdev,
301 int min_uV, int max_uV, unsigned *selector)
302 {
303 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
304 struct i2c_client *i2c = max8998->iodev->i2c;
305 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
306 const struct voltage_map_desc *desc;
307 int ldo = rdev_get_id(rdev);
308 int reg, shift = 0, mask, ret, i;
309
310 if (ldo >= ARRAY_SIZE(ldo_voltage_map))
311 return -EINVAL;
312
313 desc = ldo_voltage_map[ldo];
314 if (desc == NULL)
315 return -EINVAL;
316
317 if (max_vol < desc->min || min_vol > desc->max)
318 return -EINVAL;
319
320 if (min_vol < desc->min)
321 min_vol = desc->min;
322
323 i = DIV_ROUND_UP(min_vol - desc->min, desc->step);
324
325 if (desc->min + desc->step*i > max_vol)
326 return -EINVAL;
327
328 *selector = i;
329
330 ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
331 if (ret)
332 return ret;
333
334 ret = max8998_update_reg(i2c, reg, i<<shift, mask<<shift);
335
336 return ret;
337 }
338
339 static inline void buck1_gpio_set(int gpio1, int gpio2, int v)
340 {
341 gpio_set_value(gpio1, v & 0x1);
342 gpio_set_value(gpio2, (v >> 1) & 0x1);
343 }
344
345 static inline void buck2_gpio_set(int gpio, int v)
346 {
347 gpio_set_value(gpio, v & 0x1);
348 }
349
350 static int max8998_set_voltage_buck(struct regulator_dev *rdev,
351 int min_uV, int max_uV, unsigned *selector)
352 {
353 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
354 struct max8998_platform_data *pdata =
355 dev_get_platdata(max8998->iodev->dev);
356 struct i2c_client *i2c = max8998->iodev->i2c;
357 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
358 const struct voltage_map_desc *desc;
359 int buck = rdev_get_id(rdev);
360 int reg, shift = 0, mask, ret;
361 int i, j, previous_sel;
362 static u8 buck1_last_val;
363
364 if (buck >= ARRAY_SIZE(ldo_voltage_map))
365 return -EINVAL;
366
367 desc = ldo_voltage_map[buck];
368
369 if (desc == NULL)
370 return -EINVAL;
371
372 if (max_vol < desc->min || min_vol > desc->max)
373 return -EINVAL;
374
375 if (min_vol < desc->min)
376 min_vol = desc->min;
377
378 i = DIV_ROUND_UP(min_vol - desc->min, desc->step);
379
380 if (desc->min + desc->step*i > max_vol)
381 return -EINVAL;
382
383 *selector = i;
384
385 ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
386 if (ret)
387 return ret;
388
389 previous_sel = max8998_get_voltage_sel(rdev);
390
391 /* Check if voltage needs to be changed */
392 /* if previous_voltage equal new voltage, return */
393 if (previous_sel == i) {
394 dev_dbg(max8998->dev, "No voltage change, old:%d, new:%d\n",
395 max8998_list_voltage(rdev, previous_sel),
396 max8998_list_voltage(rdev, i));
397 return ret;
398 }
399
400 switch (buck) {
401 case MAX8998_BUCK1:
402 dev_dbg(max8998->dev,
403 "BUCK1, i:%d, buck1_vol1:%d, buck1_vol2:%d\n"
404 "buck1_vol3:%d, buck1_vol4:%d\n",
405 i, max8998->buck1_vol[0], max8998->buck1_vol[1],
406 max8998->buck1_vol[2], max8998->buck1_vol[3]);
407
408 if (gpio_is_valid(pdata->buck1_set1) &&
409 gpio_is_valid(pdata->buck1_set2)) {
410
411 /* check if requested voltage */
412 /* value is already defined */
413 for (j = 0; j < ARRAY_SIZE(max8998->buck1_vol); j++) {
414 if (max8998->buck1_vol[j] == i) {
415 max8998->buck1_idx = j;
416 buck1_gpio_set(pdata->buck1_set1,
417 pdata->buck1_set2, j);
418 goto buck1_exit;
419 }
420 }
421
422 if (pdata->buck_voltage_lock)
423 return -EINVAL;
424
425 /* no predefine regulator found */
426 max8998->buck1_idx = (buck1_last_val % 2) + 2;
427 dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n",
428 max8998->buck1_idx);
429 max8998->buck1_vol[max8998->buck1_idx] = i;
430 ret = max8998_get_voltage_register(rdev, &reg,
431 &shift,
432 &mask);
433 ret = max8998_write_reg(i2c, reg, i);
434 buck1_gpio_set(pdata->buck1_set1,
435 pdata->buck1_set2, max8998->buck1_idx);
436 buck1_last_val++;
437 buck1_exit:
438 dev_dbg(max8998->dev, "%s: SET1:%d, SET2:%d\n",
439 i2c->name, gpio_get_value(pdata->buck1_set1),
440 gpio_get_value(pdata->buck1_set2));
441 break;
442 } else {
443 ret = max8998_write_reg(i2c, reg, i);
444 }
445 break;
446
447 case MAX8998_BUCK2:
448 dev_dbg(max8998->dev,
449 "BUCK2, i:%d buck2_vol1:%d, buck2_vol2:%d\n"
450 , i, max8998->buck2_vol[0], max8998->buck2_vol[1]);
451 if (gpio_is_valid(pdata->buck2_set3)) {
452
453 /* check if requested voltage */
454 /* value is already defined */
455 for (j = 0; j < ARRAY_SIZE(max8998->buck2_vol); j++) {
456 if (max8998->buck2_vol[j] == i) {
457 max8998->buck2_idx = j;
458 buck2_gpio_set(pdata->buck2_set3, j);
459 goto buck2_exit;
460 }
461 }
462
463 if (pdata->buck_voltage_lock)
464 return -EINVAL;
465
466 max8998_get_voltage_register(rdev,
467 &reg, &shift, &mask);
468 ret = max8998_write_reg(i2c, reg, i);
469 max8998->buck2_vol[max8998->buck2_idx] = i;
470 buck2_gpio_set(pdata->buck2_set3, max8998->buck2_idx);
471 buck2_exit:
472 dev_dbg(max8998->dev, "%s: SET3:%d\n", i2c->name,
473 gpio_get_value(pdata->buck2_set3));
474 } else {
475 ret = max8998_write_reg(i2c, reg, i);
476 }
477 break;
478
479 case MAX8998_BUCK3:
480 case MAX8998_BUCK4:
481 ret = max8998_update_reg(i2c, reg, i<<shift, mask<<shift);
482 break;
483 }
484
485 return ret;
486 }
487
488 static int max8998_set_voltage_buck_time_sel(struct regulator_dev *rdev,
489 unsigned int old_selector,
490 unsigned int new_selector)
491 {
492 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
493 struct i2c_client *i2c = max8998->iodev->i2c;
494 const struct voltage_map_desc *desc;
495 int buck = rdev_get_id(rdev);
496 u8 val = 0;
497 int difference, ret;
498
499 if (buck < MAX8998_BUCK1 || buck > MAX8998_BUCK4)
500 return -EINVAL;
501
502 desc = ldo_voltage_map[buck];
503
504 /* Voltage stabilization */
505 ret = max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val);
506 if (ret)
507 return ret;
508
509 /* lp3974 hasn't got ENRAMP bit - ramp is assumed as true */
510 /* MAX8998 has ENRAMP bit implemented, so test it*/
511 if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP))
512 return 0;
513
514 difference = (new_selector - old_selector) * desc->step;
515 if (difference > 0)
516 return difference / ((val & 0x0f) + 1);
517
518 return 0;
519 }
520
521 static struct regulator_ops max8998_ldo_ops = {
522 .list_voltage = max8998_list_voltage,
523 .is_enabled = max8998_ldo_is_enabled,
524 .enable = max8998_ldo_enable,
525 .disable = max8998_ldo_disable,
526 .get_voltage_sel = max8998_get_voltage_sel,
527 .set_voltage = max8998_set_voltage_ldo,
528 .set_suspend_enable = max8998_ldo_enable,
529 .set_suspend_disable = max8998_ldo_disable,
530 };
531
532 static struct regulator_ops max8998_buck_ops = {
533 .list_voltage = max8998_list_voltage,
534 .is_enabled = max8998_ldo_is_enabled,
535 .enable = max8998_ldo_enable,
536 .disable = max8998_ldo_disable,
537 .get_voltage_sel = max8998_get_voltage_sel,
538 .set_voltage = max8998_set_voltage_buck,
539 .set_voltage_time_sel = max8998_set_voltage_buck_time_sel,
540 .set_suspend_enable = max8998_ldo_enable,
541 .set_suspend_disable = max8998_ldo_disable,
542 };
543
544 static struct regulator_ops max8998_others_ops = {
545 .is_enabled = max8998_ldo_is_enabled,
546 .enable = max8998_ldo_enable,
547 .disable = max8998_ldo_disable,
548 .set_suspend_enable = max8998_ldo_enable,
549 .set_suspend_disable = max8998_ldo_disable,
550 };
551
552 static struct regulator_desc regulators[] = {
553 {
554 .name = "LDO2",
555 .id = MAX8998_LDO2,
556 .ops = &max8998_ldo_ops,
557 .type = REGULATOR_VOLTAGE,
558 .owner = THIS_MODULE,
559 }, {
560 .name = "LDO3",
561 .id = MAX8998_LDO3,
562 .ops = &max8998_ldo_ops,
563 .type = REGULATOR_VOLTAGE,
564 .owner = THIS_MODULE,
565 }, {
566 .name = "LDO4",
567 .id = MAX8998_LDO4,
568 .ops = &max8998_ldo_ops,
569 .type = REGULATOR_VOLTAGE,
570 .owner = THIS_MODULE,
571 }, {
572 .name = "LDO5",
573 .id = MAX8998_LDO5,
574 .ops = &max8998_ldo_ops,
575 .type = REGULATOR_VOLTAGE,
576 .owner = THIS_MODULE,
577 }, {
578 .name = "LDO6",
579 .id = MAX8998_LDO6,
580 .ops = &max8998_ldo_ops,
581 .type = REGULATOR_VOLTAGE,
582 .owner = THIS_MODULE,
583 }, {
584 .name = "LDO7",
585 .id = MAX8998_LDO7,
586 .ops = &max8998_ldo_ops,
587 .type = REGULATOR_VOLTAGE,
588 .owner = THIS_MODULE,
589 }, {
590 .name = "LDO8",
591 .id = MAX8998_LDO8,
592 .ops = &max8998_ldo_ops,
593 .type = REGULATOR_VOLTAGE,
594 .owner = THIS_MODULE,
595 }, {
596 .name = "LDO9",
597 .id = MAX8998_LDO9,
598 .ops = &max8998_ldo_ops,
599 .type = REGULATOR_VOLTAGE,
600 .owner = THIS_MODULE,
601 }, {
602 .name = "LDO10",
603 .id = MAX8998_LDO10,
604 .ops = &max8998_ldo_ops,
605 .type = REGULATOR_VOLTAGE,
606 .owner = THIS_MODULE,
607 }, {
608 .name = "LDO11",
609 .id = MAX8998_LDO11,
610 .ops = &max8998_ldo_ops,
611 .type = REGULATOR_VOLTAGE,
612 .owner = THIS_MODULE,
613 }, {
614 .name = "LDO12",
615 .id = MAX8998_LDO12,
616 .ops = &max8998_ldo_ops,
617 .type = REGULATOR_VOLTAGE,
618 .owner = THIS_MODULE,
619 }, {
620 .name = "LDO13",
621 .id = MAX8998_LDO13,
622 .ops = &max8998_ldo_ops,
623 .type = REGULATOR_VOLTAGE,
624 .owner = THIS_MODULE,
625 }, {
626 .name = "LDO14",
627 .id = MAX8998_LDO14,
628 .ops = &max8998_ldo_ops,
629 .type = REGULATOR_VOLTAGE,
630 .owner = THIS_MODULE,
631 }, {
632 .name = "LDO15",
633 .id = MAX8998_LDO15,
634 .ops = &max8998_ldo_ops,
635 .type = REGULATOR_VOLTAGE,
636 .owner = THIS_MODULE,
637 }, {
638 .name = "LDO16",
639 .id = MAX8998_LDO16,
640 .ops = &max8998_ldo_ops,
641 .type = REGULATOR_VOLTAGE,
642 .owner = THIS_MODULE,
643 }, {
644 .name = "LDO17",
645 .id = MAX8998_LDO17,
646 .ops = &max8998_ldo_ops,
647 .type = REGULATOR_VOLTAGE,
648 .owner = THIS_MODULE,
649 }, {
650 .name = "BUCK1",
651 .id = MAX8998_BUCK1,
652 .ops = &max8998_buck_ops,
653 .type = REGULATOR_VOLTAGE,
654 .owner = THIS_MODULE,
655 }, {
656 .name = "BUCK2",
657 .id = MAX8998_BUCK2,
658 .ops = &max8998_buck_ops,
659 .type = REGULATOR_VOLTAGE,
660 .owner = THIS_MODULE,
661 }, {
662 .name = "BUCK3",
663 .id = MAX8998_BUCK3,
664 .ops = &max8998_buck_ops,
665 .type = REGULATOR_VOLTAGE,
666 .owner = THIS_MODULE,
667 }, {
668 .name = "BUCK4",
669 .id = MAX8998_BUCK4,
670 .ops = &max8998_buck_ops,
671 .type = REGULATOR_VOLTAGE,
672 .owner = THIS_MODULE,
673 }, {
674 .name = "EN32KHz AP",
675 .id = MAX8998_EN32KHZ_AP,
676 .ops = &max8998_others_ops,
677 .type = REGULATOR_VOLTAGE,
678 .owner = THIS_MODULE,
679 }, {
680 .name = "EN32KHz CP",
681 .id = MAX8998_EN32KHZ_CP,
682 .ops = &max8998_others_ops,
683 .type = REGULATOR_VOLTAGE,
684 .owner = THIS_MODULE,
685 }, {
686 .name = "ENVICHG",
687 .id = MAX8998_ENVICHG,
688 .ops = &max8998_others_ops,
689 .type = REGULATOR_VOLTAGE,
690 .owner = THIS_MODULE,
691 }, {
692 .name = "ESAFEOUT1",
693 .id = MAX8998_ESAFEOUT1,
694 .ops = &max8998_others_ops,
695 .type = REGULATOR_VOLTAGE,
696 .owner = THIS_MODULE,
697 }, {
698 .name = "ESAFEOUT2",
699 .id = MAX8998_ESAFEOUT2,
700 .ops = &max8998_others_ops,
701 .type = REGULATOR_VOLTAGE,
702 .owner = THIS_MODULE,
703 }
704 };
705
706 static __devinit int max8998_pmic_probe(struct platform_device *pdev)
707 {
708 struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
709 struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev);
710 struct regulator_config config = { };
711 struct regulator_dev **rdev;
712 struct max8998_data *max8998;
713 struct i2c_client *i2c;
714 int i, ret, size;
715
716 if (!pdata) {
717 dev_err(pdev->dev.parent, "No platform init data supplied\n");
718 return -ENODEV;
719 }
720
721 max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_data),
722 GFP_KERNEL);
723 if (!max8998)
724 return -ENOMEM;
725
726 size = sizeof(struct regulator_dev *) * pdata->num_regulators;
727 max8998->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
728 if (!max8998->rdev)
729 return -ENOMEM;
730
731 rdev = max8998->rdev;
732 max8998->dev = &pdev->dev;
733 max8998->iodev = iodev;
734 max8998->num_regulators = pdata->num_regulators;
735 platform_set_drvdata(pdev, max8998);
736 i2c = max8998->iodev->i2c;
737
738 max8998->buck1_idx = pdata->buck1_default_idx;
739 max8998->buck2_idx = pdata->buck2_default_idx;
740
741 /* NOTE: */
742 /* For unused GPIO NOT marked as -1 (thereof equal to 0) WARN_ON */
743 /* will be displayed */
744
745 /* Check if MAX8998 voltage selection GPIOs are defined */
746 if (gpio_is_valid(pdata->buck1_set1) &&
747 gpio_is_valid(pdata->buck1_set2)) {
748 /* Check if SET1 is not equal to 0 */
749 if (!pdata->buck1_set1) {
750 printk(KERN_ERR "MAX8998 SET1 GPIO defined as 0 !\n");
751 WARN_ON(!pdata->buck1_set1);
752 ret = -EIO;
753 goto err_out;
754 }
755 /* Check if SET2 is not equal to 0 */
756 if (!pdata->buck1_set2) {
757 printk(KERN_ERR "MAX8998 SET2 GPIO defined as 0 !\n");
758 WARN_ON(!pdata->buck1_set2);
759 ret = -EIO;
760 goto err_out;
761 }
762
763 gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1");
764 gpio_direction_output(pdata->buck1_set1,
765 max8998->buck1_idx & 0x1);
766
767
768 gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2");
769 gpio_direction_output(pdata->buck1_set2,
770 (max8998->buck1_idx >> 1) & 0x1);
771 /* Set predefined value for BUCK1 register 1 */
772 i = 0;
773 while (buck12_voltage_map_desc.min +
774 buck12_voltage_map_desc.step*i
775 < (pdata->buck1_voltage1 / 1000))
776 i++;
777 max8998->buck1_vol[0] = i;
778 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE1, i);
779 if (ret)
780 goto err_out;
781
782 /* Set predefined value for BUCK1 register 2 */
783 i = 0;
784 while (buck12_voltage_map_desc.min +
785 buck12_voltage_map_desc.step*i
786 < (pdata->buck1_voltage2 / 1000))
787 i++;
788
789 max8998->buck1_vol[1] = i;
790 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE2, i);
791 if (ret)
792 goto err_out;
793
794 /* Set predefined value for BUCK1 register 3 */
795 i = 0;
796 while (buck12_voltage_map_desc.min +
797 buck12_voltage_map_desc.step*i
798 < (pdata->buck1_voltage3 / 1000))
799 i++;
800
801 max8998->buck1_vol[2] = i;
802 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE3, i);
803 if (ret)
804 goto err_out;
805
806 /* Set predefined value for BUCK1 register 4 */
807 i = 0;
808 while (buck12_voltage_map_desc.min +
809 buck12_voltage_map_desc.step*i
810 < (pdata->buck1_voltage4 / 1000))
811 i++;
812
813 max8998->buck1_vol[3] = i;
814 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE4, i);
815 if (ret)
816 goto err_out;
817
818 }
819
820 if (gpio_is_valid(pdata->buck2_set3)) {
821 /* Check if SET3 is not equal to 0 */
822 if (!pdata->buck2_set3) {
823 printk(KERN_ERR "MAX8998 SET3 GPIO defined as 0 !\n");
824 WARN_ON(!pdata->buck2_set3);
825 ret = -EIO;
826 goto err_out;
827 }
828 gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3");
829 gpio_direction_output(pdata->buck2_set3,
830 max8998->buck2_idx & 0x1);
831
832 /* BUCK2 register 1 */
833 i = 0;
834 while (buck12_voltage_map_desc.min +
835 buck12_voltage_map_desc.step*i
836 < (pdata->buck2_voltage1 / 1000))
837 i++;
838 max8998->buck2_vol[0] = i;
839 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE1, i);
840 if (ret)
841 goto err_out;
842
843 /* BUCK2 register 2 */
844 i = 0;
845 while (buck12_voltage_map_desc.min +
846 buck12_voltage_map_desc.step*i
847 < (pdata->buck2_voltage2 / 1000))
848 i++;
849 max8998->buck2_vol[1] = i;
850 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE2, i);
851 if (ret)
852 goto err_out;
853 }
854
855 for (i = 0; i < pdata->num_regulators; i++) {
856 const struct voltage_map_desc *desc;
857 int id = pdata->regulators[i].id;
858 int index = id - MAX8998_LDO2;
859
860 desc = ldo_voltage_map[id];
861 if (desc && regulators[index].ops != &max8998_others_ops) {
862 int count = (desc->max - desc->min) / desc->step + 1;
863 regulators[index].n_voltages = count;
864 }
865
866 config.dev = max8998->dev;
867 config.init_data = pdata->regulators[i].initdata;
868 config.driver_data = max8998;
869
870 rdev[i] = regulator_register(&regulators[index], &config);
871 if (IS_ERR(rdev[i])) {
872 ret = PTR_ERR(rdev[i]);
873 dev_err(max8998->dev, "regulator init failed\n");
874 rdev[i] = NULL;
875 goto err;
876 }
877 }
878
879
880 return 0;
881 err:
882 while (--i >= 0)
883 regulator_unregister(rdev[i]);
884 err_out:
885 return ret;
886 }
887
888 static int __devexit max8998_pmic_remove(struct platform_device *pdev)
889 {
890 struct max8998_data *max8998 = platform_get_drvdata(pdev);
891 struct regulator_dev **rdev = max8998->rdev;
892 int i;
893
894 for (i = 0; i < max8998->num_regulators; i++)
895 regulator_unregister(rdev[i]);
896 return 0;
897 }
898
899 static const struct platform_device_id max8998_pmic_id[] = {
900 { "max8998-pmic", TYPE_MAX8998 },
901 { "lp3974-pmic", TYPE_LP3974 },
902 { }
903 };
904 MODULE_DEVICE_TABLE(platform, max8998_pmic_id);
905
906 static struct platform_driver max8998_pmic_driver = {
907 .driver = {
908 .name = "max8998-pmic",
909 .owner = THIS_MODULE,
910 },
911 .probe = max8998_pmic_probe,
912 .remove = __devexit_p(max8998_pmic_remove),
913 .id_table = max8998_pmic_id,
914 };
915
916 static int __init max8998_pmic_init(void)
917 {
918 return platform_driver_register(&max8998_pmic_driver);
919 }
920 subsys_initcall(max8998_pmic_init);
921
922 static void __exit max8998_pmic_cleanup(void)
923 {
924 platform_driver_unregister(&max8998_pmic_driver);
925 }
926 module_exit(max8998_pmic_cleanup);
927
928 MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver");
929 MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
930 MODULE_LICENSE("GPL");
Linux with added FPC-III support