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regulator: max8998: Convert to regulator_list_voltage_linear()
[deliverable/linux.git] / drivers / regulator / max8998.c
CommitLineData
156f2528
KP		 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
36struct max8998_data {
37 struct device *dev;
38 struct max8998_dev *iodev;
39 int num_regulators;
40 struct regulator_dev **rdev;
889cd5a6
LM		 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;
156f2528
KP		 46};
47
48struct voltage_map_desc {
49 int min;
50 int max;
51 int step;
52};
53
54/* Voltage maps */
55static const struct voltage_map_desc ldo23_voltage_map_desc = {
56 .min = 800, .step = 50, .max = 1300,
57};
58static const struct voltage_map_desc ldo456711_voltage_map_desc = {
59 .min = 1600, .step = 100, .max = 3600,
60};
61static const struct voltage_map_desc ldo8_voltage_map_desc = {
62 .min = 3000, .step = 100, .max = 3600,
63};
64static const struct voltage_map_desc ldo9_voltage_map_desc = {
65 .min = 2800, .step = 100, .max = 3100,
66};
67static const struct voltage_map_desc ldo10_voltage_map_desc = {
68 .min = 950, .step = 50, .max = 1300,
69};
70static const struct voltage_map_desc ldo1213_voltage_map_desc = {
71 .min = 800, .step = 100, .max = 3300,
72};
73static const struct voltage_map_desc ldo1415_voltage_map_desc = {
74 .min = 1200, .step = 100, .max = 3300,
75};
76static const struct voltage_map_desc ldo1617_voltage_map_desc = {
77 .min = 1600, .step = 100, .max = 3600,
78};
79static const struct voltage_map_desc buck12_voltage_map_desc = {
80 .min = 750, .step = 25, .max = 1525,
81};
82static const struct voltage_map_desc buck3_voltage_map_desc = {
83 .min = 1600, .step = 100, .max = 3600,
84};
85static const struct voltage_map_desc buck4_voltage_map_desc = {
86 .min = 800, .step = 100, .max = 2300,
87};
88
89static 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
156f2528
KP		 114static int max8998_get_enable_register(struct regulator_dev *rdev,
115 int *reg, int *shift)
116{
7b94791b 117 int ldo = rdev_get_id(rdev);
156f2528
KP		 118
119 switch (ldo) {
120 case MAX8998_LDO2 ... MAX8998_LDO5:
121 *reg = MAX8998_REG_ONOFF1;
122 *shift = 3 - (ldo - MAX8998_LDO2);
123 break;
124 case MAX8998_LDO6 ... MAX8998_LDO13:
125 *reg = MAX8998_REG_ONOFF2;
126 *shift = 7 - (ldo - MAX8998_LDO6);
127 break;
128 case MAX8998_LDO14 ... MAX8998_LDO17:
129 *reg = MAX8998_REG_ONOFF3;
130 *shift = 7 - (ldo - MAX8998_LDO14);
131 break;
132 case MAX8998_BUCK1 ... MAX8998_BUCK4:
133 *reg = MAX8998_REG_ONOFF1;
134 *shift = 7 - (ldo - MAX8998_BUCK1);
135 break;
136 case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG:
137 *reg = MAX8998_REG_ONOFF4;
138 *shift = 7 - (ldo - MAX8998_EN32KHZ_AP);
139 break;
140 case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2:
141 *reg = MAX8998_REG_CHGR2;
142 *shift = 7 - (ldo - MAX8998_ESAFEOUT1);
143 break;
144 default:
145 return -EINVAL;
146 }
147
148 return 0;
149}
150
151static int max8998_ldo_is_enabled(struct regulator_dev *rdev)
152{
153 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
676e02d7 154 struct i2c_client *i2c = max8998->iodev->i2c;
156f2528
KP		 155 int ret, reg, shift = 8;
156 u8 val;
157
158 ret = max8998_get_enable_register(rdev, &reg, &shift);
159 if (ret)
160 return ret;
161
676e02d7 162 ret = max8998_read_reg(i2c, reg, &val);
156f2528
KP		 163 if (ret)
164 return ret;
165
166 return val & (1 << shift);
167}
168
169static int max8998_ldo_enable(struct regulator_dev *rdev)
170{
171 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
676e02d7 172 struct i2c_client *i2c = max8998->iodev->i2c;
156f2528
KP		 173 int reg, shift = 8, ret;
174
175 ret = max8998_get_enable_register(rdev, &reg, &shift);
176 if (ret)
177 return ret;
178
676e02d7 179 return max8998_update_reg(i2c, reg, 1<<shift, 1<<shift);
156f2528
KP		 180}
181
182static int max8998_ldo_disable(struct regulator_dev *rdev)
183{
184 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
676e02d7 185 struct i2c_client *i2c = max8998->iodev->i2c;
156f2528
KP		 186 int reg, shift = 8, ret;
187
188 ret = max8998_get_enable_register(rdev, &reg, &shift);
189 if (ret)
190 return ret;
191
676e02d7 192 return max8998_update_reg(i2c, reg, 0, 1<<shift);
156f2528
KP		 193}
194
195static int max8998_get_voltage_register(struct regulator_dev *rdev,
196 int *_reg, int *_shift, int *_mask)
197{
7b94791b 198 int ldo = rdev_get_id(rdev);
889cd5a6 199 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
156f2528
KP		 200 int reg, shift = 0, mask = 0xff;
201
202 switch (ldo) {
203 case MAX8998_LDO2 ... MAX8998_LDO3:
204 reg = MAX8998_REG_LDO2_LDO3;
205 mask = 0xf;
206 if (ldo == MAX8998_LDO2)
207 shift = 4;
208 else
209 shift = 0;
210 break;
211 case MAX8998_LDO4 ... MAX8998_LDO7:
212 reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4);
213 break;
214 case MAX8998_LDO8 ... MAX8998_LDO9:
215 reg = MAX8998_REG_LDO8_LDO9;
216 mask = 0xf;
217 if (ldo == MAX8998_LDO8)
218 shift = 4;
219 else
220 shift = 0;
221 break;
222 case MAX8998_LDO10 ... MAX8998_LDO11:
223 reg = MAX8998_REG_LDO10_LDO11;
224 if (ldo == MAX8998_LDO10) {
225 shift = 5;
226 mask = 0x7;
227 } else {
228 shift = 0;
229 mask = 0x1f;
230 }
231 break;
232 case MAX8998_LDO12 ... MAX8998_LDO17:
233 reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12);
234 break;
235 case MAX8998_BUCK1:
889cd5a6 236 reg = MAX8998_REG_BUCK1_VOLTAGE1 + max8998->buck1_idx;
156f2528
KP		 237 break;
238 case MAX8998_BUCK2:
889cd5a6 239 reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx;
156f2528
KP		 240 break;
241 case MAX8998_BUCK3:
242 reg = MAX8998_REG_BUCK3;
243 break;
244 case MAX8998_BUCK4:
245 reg = MAX8998_REG_BUCK4;
246 break;
247 default:
248 return -EINVAL;
249 }
250
251 *_reg = reg;
252 *_shift = shift;
253 *_mask = mask;
254
255 return 0;
256}
257
7b4354b4 258static int max8998_get_voltage_sel(struct regulator_dev *rdev)
156f2528
KP		 259{
260 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
676e02d7 261 struct i2c_client *i2c = max8998->iodev->i2c;
156f2528
KP		 262 int reg, shift = 0, mask, ret;
263 u8 val;
264
265 ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
266 if (ret)
267 return ret;
268
676e02d7 269 ret = max8998_read_reg(i2c, reg, &val);
156f2528
KP		 270 if (ret)
271 return ret;
272
273 val >>= shift;
274 val &= mask;
275
7b4354b4 276 return val;
156f2528
KP		 277}
278
9d92492f 279static int max8998_set_voltage_ldo(struct regulator_dev *rdev,
3a93f2a9 280 int min_uV, int max_uV, unsigned *selector)
9d92492f
LM		 281{
282 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
283 struct i2c_client *i2c = max8998->iodev->i2c;
284 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
285 const struct voltage_map_desc *desc;
7b94791b 286 int ldo = rdev_get_id(rdev);
2e42a7dc 287 int reg, shift = 0, mask, ret, i;
9d92492f
LM		 288
289 if (ldo >= ARRAY_SIZE(ldo_voltage_map))
290 return -EINVAL;
291
292 desc = ldo_voltage_map[ldo];
293 if (desc == NULL)
294 return -EINVAL;
295
296 if (max_vol < desc->min || min_vol > desc->max)
297 return -EINVAL;
298
2e42a7dc
AL		 299 if (min_vol < desc->min)
300 min_vol = desc->min;
301
302 i = DIV_ROUND_UP(min_vol - desc->min, desc->step);
9d92492f
LM		 303
304 if (desc->min + desc->step*i > max_vol)
305 return -EINVAL;
306
3a93f2a9
MB		 307 *selector = i;
308
9d92492f
LM		 309 ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
310 if (ret)
311 return ret;
312
313 ret = max8998_update_reg(i2c, reg, i<<shift, mask<<shift);
314
315 return ret;
316}
317
50f19a45
LM		 318static inline void buck1_gpio_set(int gpio1, int gpio2, int v)
319{
320 gpio_set_value(gpio1, v & 0x1);
321 gpio_set_value(gpio2, (v >> 1) & 0x1);
322}
323
324static inline void buck2_gpio_set(int gpio, int v)
325{
326 gpio_set_value(gpio, v & 0x1);
327}
328
9d92492f 329static int max8998_set_voltage_buck(struct regulator_dev *rdev,
f4d6adf1 330 int min_uV, int max_uV, unsigned *selector)
156f2528
KP		 331{
332 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
50f19a45
LM		 333 struct max8998_platform_data *pdata =
334 dev_get_platdata(max8998->iodev->dev);
676e02d7 335 struct i2c_client *i2c = max8998->iodev->i2c;
156f2528
KP		 336 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
337 const struct voltage_map_desc *desc;
7b94791b 338 int buck = rdev_get_id(rdev);
156f2528 339 int reg, shift = 0, mask, ret;
276909d3 340 int i, j, previous_sel;
50f19a45 341 static u8 buck1_last_val;
156f2528 342
50f19a45 343 if (buck >= ARRAY_SIZE(ldo_voltage_map))
156f2528
KP		 344 return -EINVAL;
345
50f19a45
LM		 346 desc = ldo_voltage_map[buck];
347
156f2528
KP		 348 if (desc == NULL)
349 return -EINVAL;
350
351 if (max_vol < desc->min || min_vol > desc->max)
352 return -EINVAL;
353
2e42a7dc
AL		 354 if (min_vol < desc->min)
355 min_vol = desc->min;
356
357 i = DIV_ROUND_UP(min_vol - desc->min, desc->step);
156f2528 358
c5a4655d
MH		 359 if (desc->min + desc->step*i > max_vol)
360 return -EINVAL;
361
3a93f2a9
MB		 362 *selector = i;
363
156f2528
KP		 364 ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
365 if (ret)
366 return ret;
367
7b4354b4 368 previous_sel = max8998_get_voltage_sel(rdev);
50f19a45
LM		 369
370 /* Check if voltage needs to be changed */
371 /* if previous_voltage equal new voltage, return */
7b4354b4 372 if (previous_sel == i) {
50f19a45 373 dev_dbg(max8998->dev, "No voltage change, old:%d, new:%d\n",
9a0fbb62
AL		 374 regulator_list_voltage_linear(rdev, previous_sel),
375 regulator_list_voltage_linear(rdev, i));
50f19a45 376 return ret;
c5a4655d
MH		 377 }
378
50f19a45
LM		 379 switch (buck) {
380 case MAX8998_BUCK1:
381 dev_dbg(max8998->dev,
85ee7a1d
JP		 382 "BUCK1, i:%d, buck1_vol1:%d, buck1_vol2:%d\n"
383 "buck1_vol3:%d, buck1_vol4:%d\n",
50f19a45
LM		 384 i, max8998->buck1_vol[0], max8998->buck1_vol[1],
385 max8998->buck1_vol[2], max8998->buck1_vol[3]);
386
387 if (gpio_is_valid(pdata->buck1_set1) &&
388 gpio_is_valid(pdata->buck1_set2)) {
389
390 /* check if requested voltage */
391 /* value is already defined */
392 for (j = 0; j < ARRAY_SIZE(max8998->buck1_vol); j++) {
393 if (max8998->buck1_vol[j] == i) {
394 max8998->buck1_idx = j;
395 buck1_gpio_set(pdata->buck1_set1,
396 pdata->buck1_set2, j);
397 goto buck1_exit;
398 }
399 }
400
735a3d9e
MH		 401 if (pdata->buck_voltage_lock)
402 return -EINVAL;
403
50f19a45
LM		 404 /* no predefine regulator found */
405 max8998->buck1_idx = (buck1_last_val % 2) + 2;
406 dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n",
407 max8998->buck1_idx);
408 max8998->buck1_vol[max8998->buck1_idx] = i;
409 ret = max8998_get_voltage_register(rdev, &reg,
410 &shift,
411 &mask);
412 ret = max8998_write_reg(i2c, reg, i);
413 buck1_gpio_set(pdata->buck1_set1,
414 pdata->buck1_set2, max8998->buck1_idx);
415 buck1_last_val++;
416buck1_exit:
417 dev_dbg(max8998->dev, "%s: SET1:%d, SET2:%d\n",
418 i2c->name, gpio_get_value(pdata->buck1_set1),
419 gpio_get_value(pdata->buck1_set2));
420 break;
421 } else {
422 ret = max8998_write_reg(i2c, reg, i);
423 }
424 break;
c5a4655d 425
50f19a45
LM		 426 case MAX8998_BUCK2:
427 dev_dbg(max8998->dev,
428 "BUCK2, i:%d buck2_vol1:%d, buck2_vol2:%d\n"
429 , i, max8998->buck2_vol[0], max8998->buck2_vol[1]);
430 if (gpio_is_valid(pdata->buck2_set3)) {
735a3d9e
MH		 431
432 /* check if requested voltage */
433 /* value is already defined */
434 for (j = 0; j < ARRAY_SIZE(max8998->buck2_vol); j++) {
435 if (max8998->buck2_vol[j] == i) {
436 max8998->buck2_idx = j;
437 buck2_gpio_set(pdata->buck2_set3, j);
438 goto buck2_exit;
439 }
50f19a45 440 }
735a3d9e
MH		 441
442 if (pdata->buck_voltage_lock)
443 return -EINVAL;
444
445 max8998_get_voltage_register(rdev,
446 &reg, &shift, &mask);
447 ret = max8998_write_reg(i2c, reg, i);
448 max8998->buck2_vol[max8998->buck2_idx] = i;
449 buck2_gpio_set(pdata->buck2_set3, max8998->buck2_idx);
450buck2_exit:
50f19a45
LM		 451 dev_dbg(max8998->dev, "%s: SET3:%d\n", i2c->name,
452 gpio_get_value(pdata->buck2_set3));
453 } else {
454 ret = max8998_write_reg(i2c, reg, i);
455 }
456 break;
457
458 case MAX8998_BUCK3:
459 case MAX8998_BUCK4:
460 ret = max8998_update_reg(i2c, reg, i<<shift, mask<<shift);
461 break;
c5a4655d
MH		 462 }
463
276909d3
AL		 464 return ret;
465}
466
467static int max8998_set_voltage_buck_time_sel(struct regulator_dev *rdev,
468 unsigned int old_selector,
469 unsigned int new_selector)
470{
471 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
472 struct i2c_client *i2c = max8998->iodev->i2c;
473 const struct voltage_map_desc *desc;
474 int buck = rdev_get_id(rdev);
475 u8 val = 0;
476 int difference, ret;
477
478 if (buck < MAX8998_BUCK1 || buck > MAX8998_BUCK4)
479 return -EINVAL;
480
481 desc = ldo_voltage_map[buck];
482
50f19a45 483 /* Voltage stabilization */
276909d3
AL		 484 ret = max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val);
485 if (ret)
486 return ret;
50f19a45
LM		 487
488 /* lp3974 hasn't got ENRAMP bit - ramp is assumed as true */
489 /* MAX8998 has ENRAMP bit implemented, so test it*/
490 if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP))
276909d3 491 return 0;
50f19a45 492
276909d3 493 difference = (new_selector - old_selector) * desc->step;
50f19a45 494 if (difference > 0)
276909d3 495 return difference / ((val & 0x0f) + 1);
50f19a45 496
276909d3 497 return 0;
156f2528
KP		 498}
499
500static struct regulator_ops max8998_ldo_ops = {
9a0fbb62 501 .list_voltage = regulator_list_voltage_linear,
156f2528
KP		 502 .is_enabled = max8998_ldo_is_enabled,
503 .enable = max8998_ldo_enable,
504 .disable = max8998_ldo_disable,
7b4354b4 505 .get_voltage_sel = max8998_get_voltage_sel,
9d92492f 506 .set_voltage = max8998_set_voltage_ldo,
156f2528
KP		 507 .set_suspend_enable = max8998_ldo_enable,
508 .set_suspend_disable = max8998_ldo_disable,
509};
510
511static struct regulator_ops max8998_buck_ops = {
9a0fbb62 512 .list_voltage = regulator_list_voltage_linear,
156f2528
KP		 513 .is_enabled = max8998_ldo_is_enabled,
514 .enable = max8998_ldo_enable,
515 .disable = max8998_ldo_disable,
7b4354b4 516 .get_voltage_sel = max8998_get_voltage_sel,
9d92492f 517 .set_voltage = max8998_set_voltage_buck,
276909d3 518 .set_voltage_time_sel = max8998_set_voltage_buck_time_sel,
156f2528
KP		 519 .set_suspend_enable = max8998_ldo_enable,
520 .set_suspend_disable = max8998_ldo_disable,
521};
522
523static struct regulator_ops max8998_others_ops = {
524 .is_enabled = max8998_ldo_is_enabled,
525 .enable = max8998_ldo_enable,
526 .disable = max8998_ldo_disable,
527 .set_suspend_enable = max8998_ldo_enable,
528 .set_suspend_disable = max8998_ldo_disable,
529};
530
531static struct regulator_desc regulators[] = {
532 {
533 .name = "LDO2",
534 .id = MAX8998_LDO2,
535 .ops = &max8998_ldo_ops,
536 .type = REGULATOR_VOLTAGE,
537 .owner = THIS_MODULE,
538 }, {
539 .name = "LDO3",
540 .id = MAX8998_LDO3,
541 .ops = &max8998_ldo_ops,
542 .type = REGULATOR_VOLTAGE,
543 .owner = THIS_MODULE,
544 }, {
545 .name = "LDO4",
546 .id = MAX8998_LDO4,
547 .ops = &max8998_ldo_ops,
548 .type = REGULATOR_VOLTAGE,
549 .owner = THIS_MODULE,
550 }, {
551 .name = "LDO5",
552 .id = MAX8998_LDO5,
553 .ops = &max8998_ldo_ops,
554 .type = REGULATOR_VOLTAGE,
555 .owner = THIS_MODULE,
556 }, {
557 .name = "LDO6",
558 .id = MAX8998_LDO6,
559 .ops = &max8998_ldo_ops,
560 .type = REGULATOR_VOLTAGE,
561 .owner = THIS_MODULE,
562 }, {
563 .name = "LDO7",
564 .id = MAX8998_LDO7,
565 .ops = &max8998_ldo_ops,
566 .type = REGULATOR_VOLTAGE,
567 .owner = THIS_MODULE,
568 }, {
569 .name = "LDO8",
570 .id = MAX8998_LDO8,
571 .ops = &max8998_ldo_ops,
572 .type = REGULATOR_VOLTAGE,
573 .owner = THIS_MODULE,
574 }, {
575 .name = "LDO9",
576 .id = MAX8998_LDO9,
577 .ops = &max8998_ldo_ops,
578 .type = REGULATOR_VOLTAGE,
579 .owner = THIS_MODULE,
580 }, {
581 .name = "LDO10",
582 .id = MAX8998_LDO10,
583 .ops = &max8998_ldo_ops,
584 .type = REGULATOR_VOLTAGE,
585 .owner = THIS_MODULE,
586 }, {
587 .name = "LDO11",
588 .id = MAX8998_LDO11,
589 .ops = &max8998_ldo_ops,
590 .type = REGULATOR_VOLTAGE,
591 .owner = THIS_MODULE,
592 }, {
593 .name = "LDO12",
594 .id = MAX8998_LDO12,
595 .ops = &max8998_ldo_ops,
596 .type = REGULATOR_VOLTAGE,
597 .owner = THIS_MODULE,
598 }, {
599 .name = "LDO13",
600 .id = MAX8998_LDO13,
601 .ops = &max8998_ldo_ops,
602 .type = REGULATOR_VOLTAGE,
603 .owner = THIS_MODULE,
604 }, {
605 .name = "LDO14",
606 .id = MAX8998_LDO14,
607 .ops = &max8998_ldo_ops,
608 .type = REGULATOR_VOLTAGE,
609 .owner = THIS_MODULE,
610 }, {
611 .name = "LDO15",
612 .id = MAX8998_LDO15,
613 .ops = &max8998_ldo_ops,
614 .type = REGULATOR_VOLTAGE,
615 .owner = THIS_MODULE,
616 }, {
617 .name = "LDO16",
618 .id = MAX8998_LDO16,
619 .ops = &max8998_ldo_ops,
620 .type = REGULATOR_VOLTAGE,
621 .owner = THIS_MODULE,
622 }, {
623 .name = "LDO17",
624 .id = MAX8998_LDO17,
625 .ops = &max8998_ldo_ops,
626 .type = REGULATOR_VOLTAGE,
627 .owner = THIS_MODULE,
628 }, {
629 .name = "BUCK1",
630 .id = MAX8998_BUCK1,
631 .ops = &max8998_buck_ops,
632 .type = REGULATOR_VOLTAGE,
633 .owner = THIS_MODULE,
634 }, {
635 .name = "BUCK2",
636 .id = MAX8998_BUCK2,
637 .ops = &max8998_buck_ops,
638 .type = REGULATOR_VOLTAGE,
639 .owner = THIS_MODULE,
640 }, {
641 .name = "BUCK3",
642 .id = MAX8998_BUCK3,
643 .ops = &max8998_buck_ops,
644 .type = REGULATOR_VOLTAGE,
645 .owner = THIS_MODULE,
646 }, {
647 .name = "BUCK4",
648 .id = MAX8998_BUCK4,
649 .ops = &max8998_buck_ops,
650 .type = REGULATOR_VOLTAGE,
651 .owner = THIS_MODULE,
652 }, {
653 .name = "EN32KHz AP",
654 .id = MAX8998_EN32KHZ_AP,
655 .ops = &max8998_others_ops,
656 .type = REGULATOR_VOLTAGE,
657 .owner = THIS_MODULE,
658 }, {
659 .name = "EN32KHz CP",
660 .id = MAX8998_EN32KHZ_CP,
661 .ops = &max8998_others_ops,
662 .type = REGULATOR_VOLTAGE,
663 .owner = THIS_MODULE,
664 }, {
665 .name = "ENVICHG",
666 .id = MAX8998_ENVICHG,
667 .ops = &max8998_others_ops,
668 .type = REGULATOR_VOLTAGE,
669 .owner = THIS_MODULE,
670 }, {
671 .name = "ESAFEOUT1",
672 .id = MAX8998_ESAFEOUT1,
673 .ops = &max8998_others_ops,
674 .type = REGULATOR_VOLTAGE,
675 .owner = THIS_MODULE,
676 }, {
677 .name = "ESAFEOUT2",
678 .id = MAX8998_ESAFEOUT2,
679 .ops = &max8998_others_ops,
680 .type = REGULATOR_VOLTAGE,
681 .owner = THIS_MODULE,
682 }
683};
684
685static __devinit int max8998_pmic_probe(struct platform_device *pdev)
686{
687 struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
688 struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev);
c172708d 689 struct regulator_config config = { };
156f2528
KP		 690 struct regulator_dev **rdev;
691 struct max8998_data *max8998;
50f19a45 692 struct i2c_client *i2c;
156f2528
KP		 693 int i, ret, size;
694
695 if (!pdata) {
696 dev_err(pdev->dev.parent, "No platform init data supplied\n");
697 return -ENODEV;
698 }
699
0f80ea14
AL		 700 max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_data),
701 GFP_KERNEL);
156f2528
KP		 702 if (!max8998)
703 return -ENOMEM;
704
11fa0d1d 705 size = sizeof(struct regulator_dev *) * pdata->num_regulators;
0f80ea14
AL		 706 max8998->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
707 if (!max8998->rdev)
156f2528 708 return -ENOMEM;
156f2528
KP		 709
710 rdev = max8998->rdev;
747cc851 711 max8998->dev = &pdev->dev;
156f2528 712 max8998->iodev = iodev;
c356cbc2 713 max8998->num_regulators = pdata->num_regulators;
156f2528 714 platform_set_drvdata(pdev, max8998);
50f19a45
LM		 715 i2c = max8998->iodev->i2c;
716
735a3d9e
MH		 717 max8998->buck1_idx = pdata->buck1_default_idx;
718 max8998->buck2_idx = pdata->buck2_default_idx;
719
50f19a45
LM		 720 /* NOTE: */
721 /* For unused GPIO NOT marked as -1 (thereof equal to 0) WARN_ON */
722 /* will be displayed */
723
724 /* Check if MAX8998 voltage selection GPIOs are defined */
725 if (gpio_is_valid(pdata->buck1_set1) &&
726 gpio_is_valid(pdata->buck1_set2)) {
727 /* Check if SET1 is not equal to 0 */
728 if (!pdata->buck1_set1) {
729 printk(KERN_ERR "MAX8998 SET1 GPIO defined as 0 !\n");
730 WARN_ON(!pdata->buck1_set1);
6be6e96f 731 ret = -EIO;
0f80ea14 732 goto err_out;
50f19a45
LM		 733 }
734 /* Check if SET2 is not equal to 0 */
735 if (!pdata->buck1_set2) {
736 printk(KERN_ERR "MAX8998 SET2 GPIO defined as 0 !\n");
737 WARN_ON(!pdata->buck1_set2);
6be6e96f 738 ret = -EIO;
0f80ea14 739 goto err_out;
50f19a45
LM		 740 }
741
742 gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1");
743 gpio_direction_output(pdata->buck1_set1,
744 max8998->buck1_idx & 0x1);
745
746
747 gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2");
748 gpio_direction_output(pdata->buck1_set2,
749 (max8998->buck1_idx >> 1) & 0x1);
750 /* Set predefined value for BUCK1 register 1 */
751 i = 0;
752 while (buck12_voltage_map_desc.min +
753 buck12_voltage_map_desc.step*i
735a3d9e 754 < (pdata->buck1_voltage1 / 1000))
50f19a45 755 i++;
50f19a45
LM		 756 max8998->buck1_vol[0] = i;
757 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE1, i);
735a3d9e 758 if (ret)
0f80ea14 759 goto err_out;
50f19a45
LM		 760
761 /* Set predefined value for BUCK1 register 2 */
762 i = 0;
763 while (buck12_voltage_map_desc.min +
764 buck12_voltage_map_desc.step*i
735a3d9e 765 < (pdata->buck1_voltage2 / 1000))
50f19a45
LM		 766 i++;
767
768 max8998->buck1_vol[1] = i;
735a3d9e
MH		 769 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE2, i);
770 if (ret)
0f80ea14 771 goto err_out;
735a3d9e
MH		 772
773 /* Set predefined value for BUCK1 register 3 */
774 i = 0;
775 while (buck12_voltage_map_desc.min +
776 buck12_voltage_map_desc.step*i
777 < (pdata->buck1_voltage3 / 1000))
778 i++;
779
780 max8998->buck1_vol[2] = i;
781 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE3, i);
782 if (ret)
0f80ea14 783 goto err_out;
735a3d9e
MH		 784
785 /* Set predefined value for BUCK1 register 4 */
786 i = 0;
787 while (buck12_voltage_map_desc.min +
788 buck12_voltage_map_desc.step*i
789 < (pdata->buck1_voltage4 / 1000))
790 i++;
791
792 max8998->buck1_vol[3] = i;
793 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE4, i);
50f19a45 794 if (ret)
0f80ea14 795 goto err_out;
50f19a45
LM		 796
797 }
798
799 if (gpio_is_valid(pdata->buck2_set3)) {
800 /* Check if SET3 is not equal to 0 */
801 if (!pdata->buck2_set3) {
802 printk(KERN_ERR "MAX8998 SET3 GPIO defined as 0 !\n");
803 WARN_ON(!pdata->buck2_set3);
6be6e96f 804 ret = -EIO;
0f80ea14 805 goto err_out;
50f19a45
LM		 806 }
807 gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3");
808 gpio_direction_output(pdata->buck2_set3,
809 max8998->buck2_idx & 0x1);
810
735a3d9e 811 /* BUCK2 register 1 */
50f19a45
LM		 812 i = 0;
813 while (buck12_voltage_map_desc.min +
814 buck12_voltage_map_desc.step*i
735a3d9e 815 < (pdata->buck2_voltage1 / 1000))
50f19a45 816 i++;
50f19a45
LM		 817 max8998->buck2_vol[0] = i;
818 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE1, i);
819 if (ret)
0f80ea14 820 goto err_out;
50f19a45 821
735a3d9e
MH		 822 /* BUCK2 register 2 */
823 i = 0;
824 while (buck12_voltage_map_desc.min +
825 buck12_voltage_map_desc.step*i
826 < (pdata->buck2_voltage2 / 1000))
827 i++;
735a3d9e
MH		 828 max8998->buck2_vol[1] = i;
829 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE2, i);
830 if (ret)
0f80ea14 831 goto err_out;
50f19a45 832 }
156f2528
KP		 833
834 for (i = 0; i < pdata->num_regulators; i++) {
835 const struct voltage_map_desc *desc;
836 int id = pdata->regulators[i].id;
837 int index = id - MAX8998_LDO2;
838
839 desc = ldo_voltage_map[id];
840 if (desc && regulators[index].ops != &max8998_others_ops) {
841 int count = (desc->max - desc->min) / desc->step + 1;
9a0fbb62 842
156f2528 843 regulators[index].n_voltages = count;
9a0fbb62
AL		 844 regulators[index].min_uV = desc->min * 1000;
845 regulators[index].uV_step = desc->step * 1000;
156f2528 846 }
c172708d
MB		 847
848 config.dev = max8998->dev;
849 config.init_data = pdata->regulators[i].initdata;
850 config.driver_data = max8998;
851
852 rdev[i] = regulator_register(&regulators[index], &config);
156f2528
KP		 853 if (IS_ERR(rdev[i])) {
854 ret = PTR_ERR(rdev[i]);
855 dev_err(max8998->dev, "regulator init failed\n");
856 rdev[i] = NULL;
857 goto err;
858 }
859 }
860
861
862 return 0;
863err:
0f80ea14
AL		 864 while (--i >= 0)
865 regulator_unregister(rdev[i]);
866err_out:
156f2528
KP		 867 return ret;
868}
869
870static int __devexit max8998_pmic_remove(struct platform_device *pdev)
871{
872 struct max8998_data *max8998 = platform_get_drvdata(pdev);
873 struct regulator_dev **rdev = max8998->rdev;
874 int i;
875
11fa0d1d 876 for (i = 0; i < max8998->num_regulators; i++)
0f80ea14 877 regulator_unregister(rdev[i]);
156f2528
KP		 878 return 0;
879}
880
337ce5d1
MH		 881static const struct platform_device_id max8998_pmic_id[] = {
882 { "max8998-pmic", TYPE_MAX8998 },
883 { "lp3974-pmic", TYPE_LP3974 },
884 { }
885};
a51b907b 886MODULE_DEVICE_TABLE(platform, max8998_pmic_id);
337ce5d1 887
156f2528
KP		 888static struct platform_driver max8998_pmic_driver = {
889 .driver = {
890 .name = "max8998-pmic",
891 .owner = THIS_MODULE,
892 },
893 .probe = max8998_pmic_probe,
894 .remove = __devexit_p(max8998_pmic_remove),
337ce5d1 895 .id_table = max8998_pmic_id,
156f2528
KP		 896};
897
898static int __init max8998_pmic_init(void)
899{
900 return platform_driver_register(&max8998_pmic_driver);
901}
902subsys_initcall(max8998_pmic_init);
903
904static void __exit max8998_pmic_cleanup(void)
905{
906 platform_driver_unregister(&max8998_pmic_driver);
907}
908module_exit(max8998_pmic_cleanup);
909
910MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver");
911MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
912MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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