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regulator: core: Use a struct to pass in regulator runtime configuration
[linux-2.6-block.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>
c5a4655d 31#include <linux/delay.h>
156f2528
KP		 32#include <linux/platform_device.h>
33#include <linux/regulator/driver.h>
34#include <linux/mfd/max8998.h>
35#include <linux/mfd/max8998-private.h>
36
37struct max8998_data {
38 struct device *dev;
39 struct max8998_dev *iodev;
40 int num_regulators;
41 struct regulator_dev **rdev;
889cd5a6
LM		 42 u8 buck1_vol[4]; /* voltages for selection */
43 u8 buck2_vol[2];
44 unsigned int buck1_idx; /* index to last changed voltage */
45 /* value in a set */
46 unsigned int buck2_idx;
156f2528
KP		 47};
48
49struct voltage_map_desc {
50 int min;
51 int max;
52 int step;
53};
54
55/* Voltage maps */
56static const struct voltage_map_desc ldo23_voltage_map_desc = {
57 .min = 800, .step = 50, .max = 1300,
58};
59static const struct voltage_map_desc ldo456711_voltage_map_desc = {
60 .min = 1600, .step = 100, .max = 3600,
61};
62static const struct voltage_map_desc ldo8_voltage_map_desc = {
63 .min = 3000, .step = 100, .max = 3600,
64};
65static const struct voltage_map_desc ldo9_voltage_map_desc = {
66 .min = 2800, .step = 100, .max = 3100,
67};
68static const struct voltage_map_desc ldo10_voltage_map_desc = {
69 .min = 950, .step = 50, .max = 1300,
70};
71static const struct voltage_map_desc ldo1213_voltage_map_desc = {
72 .min = 800, .step = 100, .max = 3300,
73};
74static const struct voltage_map_desc ldo1415_voltage_map_desc = {
75 .min = 1200, .step = 100, .max = 3300,
76};
77static const struct voltage_map_desc ldo1617_voltage_map_desc = {
78 .min = 1600, .step = 100, .max = 3600,
79};
80static const struct voltage_map_desc buck12_voltage_map_desc = {
81 .min = 750, .step = 25, .max = 1525,
82};
83static const struct voltage_map_desc buck3_voltage_map_desc = {
84 .min = 1600, .step = 100, .max = 3600,
85};
86static const struct voltage_map_desc buck4_voltage_map_desc = {
87 .min = 800, .step = 100, .max = 2300,
88};
89
90static const struct voltage_map_desc *ldo_voltage_map[] = {
91 NULL,
92 NULL,
93 &ldo23_voltage_map_desc, /* LDO2 */
94 &ldo23_voltage_map_desc, /* LDO3 */
95 &ldo456711_voltage_map_desc, /* LDO4 */
96 &ldo456711_voltage_map_desc, /* LDO5 */
97 &ldo456711_voltage_map_desc, /* LDO6 */
98 &ldo456711_voltage_map_desc, /* LDO7 */
99 &ldo8_voltage_map_desc, /* LDO8 */
100 &ldo9_voltage_map_desc, /* LDO9 */
101 &ldo10_voltage_map_desc, /* LDO10 */
102 &ldo456711_voltage_map_desc, /* LDO11 */
103 &ldo1213_voltage_map_desc, /* LDO12 */
104 &ldo1213_voltage_map_desc, /* LDO13 */
105 &ldo1415_voltage_map_desc, /* LDO14 */
106 &ldo1415_voltage_map_desc, /* LDO15 */
107 &ldo1617_voltage_map_desc, /* LDO16 */
108 &ldo1617_voltage_map_desc, /* LDO17 */
109 &buck12_voltage_map_desc, /* BUCK1 */
110 &buck12_voltage_map_desc, /* BUCK2 */
111 &buck3_voltage_map_desc, /* BUCK3 */
112 &buck4_voltage_map_desc, /* BUCK4 */
113};
114
156f2528
KP		 115static int max8998_list_voltage(struct regulator_dev *rdev,
116 unsigned int selector)
117{
118 const struct voltage_map_desc *desc;
7b94791b 119 int ldo = rdev_get_id(rdev);
156f2528
KP		 120 int val;
121
1b69d8e3 122 if (ldo >= ARRAY_SIZE(ldo_voltage_map))
156f2528
KP		 123 return -EINVAL;
124
125 desc = ldo_voltage_map[ldo];
126 if (desc == NULL)
127 return -EINVAL;
128
129 val = desc->min + desc->step * selector;
130 if (val > desc->max)
131 return -EINVAL;
132
133 return val * 1000;
134}
135
136static int max8998_get_enable_register(struct regulator_dev *rdev,
137 int *reg, int *shift)
138{
7b94791b 139 int ldo = rdev_get_id(rdev);
156f2528
KP		 140
141 switch (ldo) {
142 case MAX8998_LDO2 ... MAX8998_LDO5:
143 *reg = MAX8998_REG_ONOFF1;
144 *shift = 3 - (ldo - MAX8998_LDO2);
145 break;
146 case MAX8998_LDO6 ... MAX8998_LDO13:
147 *reg = MAX8998_REG_ONOFF2;
148 *shift = 7 - (ldo - MAX8998_LDO6);
149 break;
150 case MAX8998_LDO14 ... MAX8998_LDO17:
151 *reg = MAX8998_REG_ONOFF3;
152 *shift = 7 - (ldo - MAX8998_LDO14);
153 break;
154 case MAX8998_BUCK1 ... MAX8998_BUCK4:
155 *reg = MAX8998_REG_ONOFF1;
156 *shift = 7 - (ldo - MAX8998_BUCK1);
157 break;
158 case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG:
159 *reg = MAX8998_REG_ONOFF4;
160 *shift = 7 - (ldo - MAX8998_EN32KHZ_AP);
161 break;
162 case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2:
163 *reg = MAX8998_REG_CHGR2;
164 *shift = 7 - (ldo - MAX8998_ESAFEOUT1);
165 break;
166 default:
167 return -EINVAL;
168 }
169
170 return 0;
171}
172
173static int max8998_ldo_is_enabled(struct regulator_dev *rdev)
174{
175 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
676e02d7 176 struct i2c_client *i2c = max8998->iodev->i2c;
156f2528
KP		 177 int ret, reg, shift = 8;
178 u8 val;
179
180 ret = max8998_get_enable_register(rdev, &reg, &shift);
181 if (ret)
182 return ret;
183
676e02d7 184 ret = max8998_read_reg(i2c, reg, &val);
156f2528
KP		 185 if (ret)
186 return ret;
187
188 return val & (1 << shift);
189}
190
191static int max8998_ldo_enable(struct regulator_dev *rdev)
192{
193 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
676e02d7 194 struct i2c_client *i2c = max8998->iodev->i2c;
156f2528
KP		 195 int reg, shift = 8, ret;
196
197 ret = max8998_get_enable_register(rdev, &reg, &shift);
198 if (ret)
199 return ret;
200
676e02d7 201 return max8998_update_reg(i2c, reg, 1<<shift, 1<<shift);
156f2528
KP		 202}
203
204static int max8998_ldo_disable(struct regulator_dev *rdev)
205{
206 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
676e02d7 207 struct i2c_client *i2c = max8998->iodev->i2c;
156f2528
KP		 208 int reg, shift = 8, ret;
209
210 ret = max8998_get_enable_register(rdev, &reg, &shift);
211 if (ret)
212 return ret;
213
676e02d7 214 return max8998_update_reg(i2c, reg, 0, 1<<shift);
156f2528
KP		 215}
216
217static int max8998_get_voltage_register(struct regulator_dev *rdev,
218 int *_reg, int *_shift, int *_mask)
219{
7b94791b 220 int ldo = rdev_get_id(rdev);
889cd5a6 221 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
156f2528
KP		 222 int reg, shift = 0, mask = 0xff;
223
224 switch (ldo) {
225 case MAX8998_LDO2 ... MAX8998_LDO3:
226 reg = MAX8998_REG_LDO2_LDO3;
227 mask = 0xf;
228 if (ldo == MAX8998_LDO2)
229 shift = 4;
230 else
231 shift = 0;
232 break;
233 case MAX8998_LDO4 ... MAX8998_LDO7:
234 reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4);
235 break;
236 case MAX8998_LDO8 ... MAX8998_LDO9:
237 reg = MAX8998_REG_LDO8_LDO9;
238 mask = 0xf;
239 if (ldo == MAX8998_LDO8)
240 shift = 4;
241 else
242 shift = 0;
243 break;
244 case MAX8998_LDO10 ... MAX8998_LDO11:
245 reg = MAX8998_REG_LDO10_LDO11;
246 if (ldo == MAX8998_LDO10) {
247 shift = 5;
248 mask = 0x7;
249 } else {
250 shift = 0;
251 mask = 0x1f;
252 }
253 break;
254 case MAX8998_LDO12 ... MAX8998_LDO17:
255 reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12);
256 break;
257 case MAX8998_BUCK1:
889cd5a6 258 reg = MAX8998_REG_BUCK1_VOLTAGE1 + max8998->buck1_idx;
156f2528
KP		 259 break;
260 case MAX8998_BUCK2:
889cd5a6 261 reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx;
156f2528
KP		 262 break;
263 case MAX8998_BUCK3:
264 reg = MAX8998_REG_BUCK3;
265 break;
266 case MAX8998_BUCK4:
267 reg = MAX8998_REG_BUCK4;
268 break;
269 default:
270 return -EINVAL;
271 }
272
273 *_reg = reg;
274 *_shift = shift;
275 *_mask = mask;
276
277 return 0;
278}
279
280static int max8998_get_voltage(struct regulator_dev *rdev)
281{
282 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
676e02d7 283 struct i2c_client *i2c = max8998->iodev->i2c;
156f2528
KP		 284 int reg, shift = 0, mask, ret;
285 u8 val;
286
287 ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
288 if (ret)
289 return ret;
290
676e02d7 291 ret = max8998_read_reg(i2c, reg, &val);
156f2528
KP		 292 if (ret)
293 return ret;
294
295 val >>= shift;
296 val &= mask;
297
298 return max8998_list_voltage(rdev, val);
299}
300
9d92492f 301static int max8998_set_voltage_ldo(struct regulator_dev *rdev,
3a93f2a9 302 int min_uV, int max_uV, unsigned *selector)
9d92492f
LM		 303{
304 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
305 struct i2c_client *i2c = max8998->iodev->i2c;
306 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
307 const struct voltage_map_desc *desc;
7b94791b 308 int ldo = rdev_get_id(rdev);
9d92492f
LM		 309 int reg, shift = 0, mask, ret;
310 int i = 0;
311
312 if (ldo >= ARRAY_SIZE(ldo_voltage_map))
313 return -EINVAL;
314
315 desc = ldo_voltage_map[ldo];
316 if (desc == NULL)
317 return -EINVAL;
318
319 if (max_vol < desc->min || min_vol > desc->max)
320 return -EINVAL;
321
322 while (desc->min + desc->step*i < min_vol &&
323 desc->min + desc->step*i < desc->max)
324 i++;
325
326 if (desc->min + desc->step*i > max_vol)
327 return -EINVAL;
328
3a93f2a9
MB		 329 *selector = i;
330
9d92492f
LM		 331 ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
332 if (ret)
333 return ret;
334
335 ret = max8998_update_reg(i2c, reg, i<<shift, mask<<shift);
336
337 return ret;
338}
339
50f19a45
LM		 340static inline void buck1_gpio_set(int gpio1, int gpio2, int v)
341{
342 gpio_set_value(gpio1, v & 0x1);
343 gpio_set_value(gpio2, (v >> 1) & 0x1);
344}
345
346static inline void buck2_gpio_set(int gpio, int v)
347{
348 gpio_set_value(gpio, v & 0x1);
349}
350
9d92492f 351static int max8998_set_voltage_buck(struct regulator_dev *rdev,
f4d6adf1 352 int min_uV, int max_uV, unsigned *selector)
156f2528
KP		 353{
354 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
50f19a45
LM		 355 struct max8998_platform_data *pdata =
356 dev_get_platdata(max8998->iodev->dev);
676e02d7 357 struct i2c_client *i2c = max8998->iodev->i2c;
156f2528
KP		 358 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
359 const struct voltage_map_desc *desc;
7b94791b 360 int buck = rdev_get_id(rdev);
156f2528 361 int reg, shift = 0, mask, ret;
50f19a45
LM		 362 int difference = 0, i = 0, j = 0, previous_vol = 0;
363 u8 val = 0;
364 static u8 buck1_last_val;
156f2528 365
50f19a45 366 if (buck >= ARRAY_SIZE(ldo_voltage_map))
156f2528
KP		 367 return -EINVAL;
368
50f19a45
LM		 369 desc = ldo_voltage_map[buck];
370
156f2528
KP		 371 if (desc == NULL)
372 return -EINVAL;
373
374 if (max_vol < desc->min || min_vol > desc->max)
375 return -EINVAL;
376
c5a4655d 377 while (desc->min + desc->step*i < min_vol &&
156f2528
KP		 378 desc->min + desc->step*i < desc->max)
379 i++;
380
c5a4655d
MH		 381 if (desc->min + desc->step*i > max_vol)
382 return -EINVAL;
383
3a93f2a9
MB		 384 *selector = i;
385
156f2528
KP		 386 ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
387 if (ret)
388 return ret;
389
50f19a45
LM		 390 previous_vol = max8998_get_voltage(rdev);
391
392 /* Check if voltage needs to be changed */
393 /* if previous_voltage equal new voltage, return */
394 if (previous_vol == max8998_list_voltage(rdev, i)) {
395 dev_dbg(max8998->dev, "No voltage change, old:%d, new:%d\n",
396 previous_vol, max8998_list_voltage(rdev, i));
397 return ret;
c5a4655d
MH		 398 }
399
50f19a45
LM		 400 switch (buck) {
401 case MAX8998_BUCK1:
402 dev_dbg(max8998->dev,
85ee7a1d
JP		 403 "BUCK1, i:%d, buck1_vol1:%d, buck1_vol2:%d\n"
404 "buck1_vol3:%d, buck1_vol4:%d\n",
50f19a45
LM		 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
735a3d9e
MH		 422 if (pdata->buck_voltage_lock)
423 return -EINVAL;
424
50f19a45
LM		 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++;
437buck1_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;
c5a4655d 446
50f19a45
LM		 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)) {
735a3d9e
MH		 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 }
50f19a45 461 }
735a3d9e
MH		 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);
471buck2_exit:
50f19a45
LM		 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;
c5a4655d
MH		 483 }
484
50f19a45
LM		 485 /* Voltage stabilization */
486 max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val);
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))
491 return ret;
492
493 difference = desc->min + desc->step*i - previous_vol/1000;
494 if (difference > 0)
495 udelay(difference / ((val & 0x0f) + 1));
496
c5a4655d 497 return ret;
156f2528
KP		 498}
499
500static struct regulator_ops max8998_ldo_ops = {
501 .list_voltage = max8998_list_voltage,
502 .is_enabled = max8998_ldo_is_enabled,
503 .enable = max8998_ldo_enable,
504 .disable = max8998_ldo_disable,
505 .get_voltage = max8998_get_voltage,
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 = {
512 .list_voltage = max8998_list_voltage,
513 .is_enabled = max8998_ldo_is_enabled,
514 .enable = max8998_ldo_enable,
515 .disable = max8998_ldo_disable,
516 .get_voltage = max8998_get_voltage,
9d92492f 517 .set_voltage = max8998_set_voltage_buck,
156f2528
KP		 518 .set_suspend_enable = max8998_ldo_enable,
519 .set_suspend_disable = max8998_ldo_disable,
520};
521
522static struct regulator_ops max8998_others_ops = {
523 .is_enabled = max8998_ldo_is_enabled,
524 .enable = max8998_ldo_enable,
525 .disable = max8998_ldo_disable,
526 .set_suspend_enable = max8998_ldo_enable,
527 .set_suspend_disable = max8998_ldo_disable,
528};
529
530static struct regulator_desc regulators[] = {
531 {
532 .name = "LDO2",
533 .id = MAX8998_LDO2,
534 .ops = &max8998_ldo_ops,
535 .type = REGULATOR_VOLTAGE,
536 .owner = THIS_MODULE,
537 }, {
538 .name = "LDO3",
539 .id = MAX8998_LDO3,
540 .ops = &max8998_ldo_ops,
541 .type = REGULATOR_VOLTAGE,
542 .owner = THIS_MODULE,
543 }, {
544 .name = "LDO4",
545 .id = MAX8998_LDO4,
546 .ops = &max8998_ldo_ops,
547 .type = REGULATOR_VOLTAGE,
548 .owner = THIS_MODULE,
549 }, {
550 .name = "LDO5",
551 .id = MAX8998_LDO5,
552 .ops = &max8998_ldo_ops,
553 .type = REGULATOR_VOLTAGE,
554 .owner = THIS_MODULE,
555 }, {
556 .name = "LDO6",
557 .id = MAX8998_LDO6,
558 .ops = &max8998_ldo_ops,
559 .type = REGULATOR_VOLTAGE,
560 .owner = THIS_MODULE,
561 }, {
562 .name = "LDO7",
563 .id = MAX8998_LDO7,
564 .ops = &max8998_ldo_ops,
565 .type = REGULATOR_VOLTAGE,
566 .owner = THIS_MODULE,
567 }, {
568 .name = "LDO8",
569 .id = MAX8998_LDO8,
570 .ops = &max8998_ldo_ops,
571 .type = REGULATOR_VOLTAGE,
572 .owner = THIS_MODULE,
573 }, {
574 .name = "LDO9",
575 .id = MAX8998_LDO9,
576 .ops = &max8998_ldo_ops,
577 .type = REGULATOR_VOLTAGE,
578 .owner = THIS_MODULE,
579 }, {
580 .name = "LDO10",
581 .id = MAX8998_LDO10,
582 .ops = &max8998_ldo_ops,
583 .type = REGULATOR_VOLTAGE,
584 .owner = THIS_MODULE,
585 }, {
586 .name = "LDO11",
587 .id = MAX8998_LDO11,
588 .ops = &max8998_ldo_ops,
589 .type = REGULATOR_VOLTAGE,
590 .owner = THIS_MODULE,
591 }, {
592 .name = "LDO12",
593 .id = MAX8998_LDO12,
594 .ops = &max8998_ldo_ops,
595 .type = REGULATOR_VOLTAGE,
596 .owner = THIS_MODULE,
597 }, {
598 .name = "LDO13",
599 .id = MAX8998_LDO13,
600 .ops = &max8998_ldo_ops,
601 .type = REGULATOR_VOLTAGE,
602 .owner = THIS_MODULE,
603 }, {
604 .name = "LDO14",
605 .id = MAX8998_LDO14,
606 .ops = &max8998_ldo_ops,
607 .type = REGULATOR_VOLTAGE,
608 .owner = THIS_MODULE,
609 }, {
610 .name = "LDO15",
611 .id = MAX8998_LDO15,
612 .ops = &max8998_ldo_ops,
613 .type = REGULATOR_VOLTAGE,
614 .owner = THIS_MODULE,
615 }, {
616 .name = "LDO16",
617 .id = MAX8998_LDO16,
618 .ops = &max8998_ldo_ops,
619 .type = REGULATOR_VOLTAGE,
620 .owner = THIS_MODULE,
621 }, {
622 .name = "LDO17",
623 .id = MAX8998_LDO17,
624 .ops = &max8998_ldo_ops,
625 .type = REGULATOR_VOLTAGE,
626 .owner = THIS_MODULE,
627 }, {
628 .name = "BUCK1",
629 .id = MAX8998_BUCK1,
630 .ops = &max8998_buck_ops,
631 .type = REGULATOR_VOLTAGE,
632 .owner = THIS_MODULE,
633 }, {
634 .name = "BUCK2",
635 .id = MAX8998_BUCK2,
636 .ops = &max8998_buck_ops,
637 .type = REGULATOR_VOLTAGE,
638 .owner = THIS_MODULE,
639 }, {
640 .name = "BUCK3",
641 .id = MAX8998_BUCK3,
642 .ops = &max8998_buck_ops,
643 .type = REGULATOR_VOLTAGE,
644 .owner = THIS_MODULE,
645 }, {
646 .name = "BUCK4",
647 .id = MAX8998_BUCK4,
648 .ops = &max8998_buck_ops,
649 .type = REGULATOR_VOLTAGE,
650 .owner = THIS_MODULE,
651 }, {
652 .name = "EN32KHz AP",
653 .id = MAX8998_EN32KHZ_AP,
654 .ops = &max8998_others_ops,
655 .type = REGULATOR_VOLTAGE,
656 .owner = THIS_MODULE,
657 }, {
658 .name = "EN32KHz CP",
659 .id = MAX8998_EN32KHZ_CP,
660 .ops = &max8998_others_ops,
661 .type = REGULATOR_VOLTAGE,
662 .owner = THIS_MODULE,
663 }, {
664 .name = "ENVICHG",
665 .id = MAX8998_ENVICHG,
666 .ops = &max8998_others_ops,
667 .type = REGULATOR_VOLTAGE,
668 .owner = THIS_MODULE,
669 }, {
670 .name = "ESAFEOUT1",
671 .id = MAX8998_ESAFEOUT1,
672 .ops = &max8998_others_ops,
673 .type = REGULATOR_VOLTAGE,
674 .owner = THIS_MODULE,
675 }, {
676 .name = "ESAFEOUT2",
677 .id = MAX8998_ESAFEOUT2,
678 .ops = &max8998_others_ops,
679 .type = REGULATOR_VOLTAGE,
680 .owner = THIS_MODULE,
681 }
682};
683
684static __devinit int max8998_pmic_probe(struct platform_device *pdev)
685{
686 struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
687 struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev);
c172708d 688 struct regulator_config config = { };
156f2528
KP		 689 struct regulator_dev **rdev;
690 struct max8998_data *max8998;
50f19a45 691 struct i2c_client *i2c;
156f2528
KP		 692 int i, ret, size;
693
694 if (!pdata) {
695 dev_err(pdev->dev.parent, "No platform init data supplied\n");
696 return -ENODEV;
697 }
698
699 max8998 = kzalloc(sizeof(struct max8998_data), GFP_KERNEL);
700 if (!max8998)
701 return -ENOMEM;
702
11fa0d1d 703 size = sizeof(struct regulator_dev *) * pdata->num_regulators;
156f2528
KP		 704 max8998->rdev = kzalloc(size, GFP_KERNEL);
705 if (!max8998->rdev) {
706 kfree(max8998);
707 return -ENOMEM;
708 }
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
AL		 731 ret = -EIO;
732 goto err_free_mem;
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
AL		 738 ret = -EIO;
739 goto err_free_mem;
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)
6be6e96f 759 goto err_free_mem;
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)
6be6e96f 771 goto err_free_mem;
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)
6be6e96f 783 goto err_free_mem;
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)
6be6e96f 795 goto err_free_mem;
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
AL		 804 ret = -EIO;
805 goto err_free_mem;
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)
6be6e96f 820 goto err_free_mem;
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)
6be6e96f 831 goto err_free_mem;
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;
842 regulators[index].n_voltages = count;
843 }
c172708d
MB		 844
845 config.dev = max8998->dev;
846 config.init_data = pdata->regulators[i].initdata;
847 config.driver_data = max8998;
848
849 rdev[i] = regulator_register(&regulators[index], &config);
156f2528
KP		 850 if (IS_ERR(rdev[i])) {
851 ret = PTR_ERR(rdev[i]);
852 dev_err(max8998->dev, "regulator init failed\n");
853 rdev[i] = NULL;
854 goto err;
855 }
856 }
857
858
859 return 0;
860err:
11fa0d1d 861 for (i = 0; i < max8998->num_regulators; i++)
156f2528
KP		 862 if (rdev[i])
863 regulator_unregister(rdev[i]);
864
6be6e96f 865err_free_mem:
156f2528
KP		 866 kfree(max8998->rdev);
867 kfree(max8998);
868
869 return ret;
870}
871
872static int __devexit max8998_pmic_remove(struct platform_device *pdev)
873{
874 struct max8998_data *max8998 = platform_get_drvdata(pdev);
875 struct regulator_dev **rdev = max8998->rdev;
876 int i;
877
11fa0d1d 878 for (i = 0; i < max8998->num_regulators; i++)
156f2528
KP		 879 if (rdev[i])
880 regulator_unregister(rdev[i]);
881
882 kfree(max8998->rdev);
883 kfree(max8998);
884
885 return 0;
886}
887
337ce5d1
MH		 888static const struct platform_device_id max8998_pmic_id[] = {
889 { "max8998-pmic", TYPE_MAX8998 },
890 { "lp3974-pmic", TYPE_LP3974 },
891 { }
892};
a51b907b 893MODULE_DEVICE_TABLE(platform, max8998_pmic_id);
337ce5d1 894
156f2528
KP		 895static struct platform_driver max8998_pmic_driver = {
896 .driver = {
897 .name = "max8998-pmic",
898 .owner = THIS_MODULE,
899 },
900 .probe = max8998_pmic_probe,
901 .remove = __devexit_p(max8998_pmic_remove),
337ce5d1 902 .id_table = max8998_pmic_id,
156f2528
KP		 903};
904
905static int __init max8998_pmic_init(void)
906{
907 return platform_driver_register(&max8998_pmic_driver);
908}
909subsys_initcall(max8998_pmic_init);
910
911static void __exit max8998_pmic_cleanup(void)
912{
913 platform_driver_unregister(&max8998_pmic_driver);
914}
915module_exit(max8998_pmic_cleanup);
916
917MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver");
918MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
919MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)