2 * max8998.c - Voltage regulator driver for the Maxim 8998
4 * Copyright (C) 2009-2010 Samsung Electronics
5 * Kyungmin Park <kyungmin.park@samsung.com>
6 * Marek Szyprowski <m.szyprowski@samsung.com>
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.
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.
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
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/delay.h>
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>
39 struct max8998_dev *iodev;
41 struct regulator_dev **rdev;
42 u8 buck1_vol[4]; /* voltages for selection */
44 unsigned int buck1_idx; /* index to last changed voltage */
46 unsigned int buck2_idx;
49 struct voltage_map_desc {
56 static const struct voltage_map_desc ldo23_voltage_map_desc = {
57 .min = 800, .step = 50, .max = 1300,
59 static const struct voltage_map_desc ldo456711_voltage_map_desc = {
60 .min = 1600, .step = 100, .max = 3600,
62 static const struct voltage_map_desc ldo8_voltage_map_desc = {
63 .min = 3000, .step = 100, .max = 3600,
65 static const struct voltage_map_desc ldo9_voltage_map_desc = {
66 .min = 2800, .step = 100, .max = 3100,
68 static const struct voltage_map_desc ldo10_voltage_map_desc = {
69 .min = 950, .step = 50, .max = 1300,
71 static const struct voltage_map_desc ldo1213_voltage_map_desc = {
72 .min = 800, .step = 100, .max = 3300,
74 static const struct voltage_map_desc ldo1415_voltage_map_desc = {
75 .min = 1200, .step = 100, .max = 3300,
77 static const struct voltage_map_desc ldo1617_voltage_map_desc = {
78 .min = 1600, .step = 100, .max = 3600,
80 static const struct voltage_map_desc buck12_voltage_map_desc = {
81 .min = 750, .step = 25, .max = 1525,
83 static const struct voltage_map_desc buck3_voltage_map_desc = {
84 .min = 1600, .step = 100, .max = 3600,
86 static const struct voltage_map_desc buck4_voltage_map_desc = {
87 .min = 800, .step = 100, .max = 2300,
90 static const struct voltage_map_desc *ldo_voltage_map[] = {
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 */
115 static int max8998_list_voltage(struct regulator_dev *rdev,
116 unsigned int selector)
118 const struct voltage_map_desc *desc;
119 int ldo = rdev_get_id(rdev);
122 if (ldo >= ARRAY_SIZE(ldo_voltage_map))
125 desc = ldo_voltage_map[ldo];
129 val = desc->min + desc->step * selector;
136 static int max8998_get_enable_register(struct regulator_dev *rdev,
137 int *reg, int *shift)
139 int ldo = rdev_get_id(rdev);
142 case MAX8998_LDO2 ... MAX8998_LDO5:
143 *reg = MAX8998_REG_ONOFF1;
144 *shift = 3 - (ldo - MAX8998_LDO2);
146 case MAX8998_LDO6 ... MAX8998_LDO13:
147 *reg = MAX8998_REG_ONOFF2;
148 *shift = 7 - (ldo - MAX8998_LDO6);
150 case MAX8998_LDO14 ... MAX8998_LDO17:
151 *reg = MAX8998_REG_ONOFF3;
152 *shift = 7 - (ldo - MAX8998_LDO14);
154 case MAX8998_BUCK1 ... MAX8998_BUCK4:
155 *reg = MAX8998_REG_ONOFF1;
156 *shift = 7 - (ldo - MAX8998_BUCK1);
158 case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG:
159 *reg = MAX8998_REG_ONOFF4;
160 *shift = 7 - (ldo - MAX8998_EN32KHZ_AP);
162 case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2:
163 *reg = MAX8998_REG_CHGR2;
164 *shift = 7 - (ldo - MAX8998_ESAFEOUT1);
173 static int max8998_ldo_is_enabled(struct regulator_dev *rdev)
175 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
176 struct i2c_client *i2c = max8998->iodev->i2c;
177 int ret, reg, shift = 8;
180 ret = max8998_get_enable_register(rdev, ®, &shift);
184 ret = max8998_read_reg(i2c, reg, &val);
188 return val & (1 << shift);
191 static int max8998_ldo_enable(struct regulator_dev *rdev)
193 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
194 struct i2c_client *i2c = max8998->iodev->i2c;
195 int reg, shift = 8, ret;
197 ret = max8998_get_enable_register(rdev, ®, &shift);
201 return max8998_update_reg(i2c, reg, 1<<shift, 1<<shift);
204 static int max8998_ldo_disable(struct regulator_dev *rdev)
206 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
207 struct i2c_client *i2c = max8998->iodev->i2c;
208 int reg, shift = 8, ret;
210 ret = max8998_get_enable_register(rdev, ®, &shift);
214 return max8998_update_reg(i2c, reg, 0, 1<<shift);
217 static int max8998_get_voltage_register(struct regulator_dev *rdev,
218 int *_reg, int *_shift, int *_mask)
220 int ldo = rdev_get_id(rdev);
221 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
222 int reg, shift = 0, mask = 0xff;
225 case MAX8998_LDO2 ... MAX8998_LDO3:
226 reg = MAX8998_REG_LDO2_LDO3;
228 if (ldo == MAX8998_LDO2)
233 case MAX8998_LDO4 ... MAX8998_LDO7:
234 reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4);
236 case MAX8998_LDO8 ... MAX8998_LDO9:
237 reg = MAX8998_REG_LDO8_LDO9;
239 if (ldo == MAX8998_LDO8)
244 case MAX8998_LDO10 ... MAX8998_LDO11:
245 reg = MAX8998_REG_LDO10_LDO11;
246 if (ldo == MAX8998_LDO10) {
254 case MAX8998_LDO12 ... MAX8998_LDO17:
255 reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12);
258 reg = MAX8998_REG_BUCK1_VOLTAGE1 + max8998->buck1_idx;
261 reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx;
264 reg = MAX8998_REG_BUCK3;
267 reg = MAX8998_REG_BUCK4;
280 static int max8998_get_voltage(struct regulator_dev *rdev)
282 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
283 struct i2c_client *i2c = max8998->iodev->i2c;
284 int reg, shift = 0, mask, ret;
287 ret = max8998_get_voltage_register(rdev, ®, &shift, &mask);
291 ret = max8998_read_reg(i2c, reg, &val);
298 return max8998_list_voltage(rdev, val);
301 static int max8998_set_voltage_ldo(struct regulator_dev *rdev,
302 int min_uV, int max_uV, unsigned *selector)
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;
308 int ldo = rdev_get_id(rdev);
309 int reg, shift = 0, mask, ret;
312 if (ldo >= ARRAY_SIZE(ldo_voltage_map))
315 desc = ldo_voltage_map[ldo];
319 if (max_vol < desc->min || min_vol > desc->max)
322 while (desc->min + desc->step*i < min_vol &&
323 desc->min + desc->step*i < desc->max)
326 if (desc->min + desc->step*i > max_vol)
331 ret = max8998_get_voltage_register(rdev, ®, &shift, &mask);
335 ret = max8998_update_reg(i2c, reg, i<<shift, mask<<shift);
340 static inline void buck1_gpio_set(int gpio1, int gpio2, int v)
342 gpio_set_value(gpio1, v & 0x1);
343 gpio_set_value(gpio2, (v >> 1) & 0x1);
346 static inline void buck2_gpio_set(int gpio, int v)
348 gpio_set_value(gpio, v & 0x1);
351 static int max8998_set_voltage_buck(struct regulator_dev *rdev,
352 int min_uV, int max_uV, unsigned *selector)
354 struct max8998_data *max8998 = rdev_get_drvdata(rdev);
355 struct max8998_platform_data *pdata =
356 dev_get_platdata(max8998->iodev->dev);
357 struct i2c_client *i2c = max8998->iodev->i2c;
358 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
359 const struct voltage_map_desc *desc;
360 int buck = rdev_get_id(rdev);
361 int reg, shift = 0, mask, ret;
362 int difference = 0, i = 0, j = 0, previous_vol = 0;
364 static u8 buck1_last_val;
366 if (buck >= ARRAY_SIZE(ldo_voltage_map))
369 desc = ldo_voltage_map[buck];
374 if (max_vol < desc->min || min_vol > desc->max)
377 while (desc->min + desc->step*i < min_vol &&
378 desc->min + desc->step*i < desc->max)
381 if (desc->min + desc->step*i > max_vol)
386 ret = max8998_get_voltage_register(rdev, ®, &shift, &mask);
390 previous_vol = max8998_get_voltage(rdev);
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));
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]);
408 if (gpio_is_valid(pdata->buck1_set1) &&
409 gpio_is_valid(pdata->buck1_set2)) {
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);
422 if (pdata->buck_voltage_lock)
425 /* no predefine regulator found */
426 max8998->buck1_idx = (buck1_last_val % 2) + 2;
427 dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n",
429 max8998->buck1_vol[max8998->buck1_idx] = i;
430 ret = max8998_get_voltage_register(rdev, ®,
433 ret = max8998_write_reg(i2c, reg, i);
434 buck1_gpio_set(pdata->buck1_set1,
435 pdata->buck1_set2, max8998->buck1_idx);
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));
443 ret = max8998_write_reg(i2c, reg, i);
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)) {
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);
463 if (pdata->buck_voltage_lock)
466 max8998_get_voltage_register(rdev,
467 ®, &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);
472 dev_dbg(max8998->dev, "%s: SET3:%d\n", i2c->name,
473 gpio_get_value(pdata->buck2_set3));
475 ret = max8998_write_reg(i2c, reg, i);
481 ret = max8998_update_reg(i2c, reg, i<<shift, mask<<shift);
485 /* Voltage stabilization */
486 max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val);
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))
493 difference = desc->min + desc->step*i - previous_vol/1000;
495 udelay(difference / ((val & 0x0f) + 1));
500 static 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,
506 .set_voltage = max8998_set_voltage_ldo,
507 .set_suspend_enable = max8998_ldo_enable,
508 .set_suspend_disable = max8998_ldo_disable,
511 static 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,
517 .set_voltage = max8998_set_voltage_buck,
518 .set_suspend_enable = max8998_ldo_enable,
519 .set_suspend_disable = max8998_ldo_disable,
522 static 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,
530 static struct regulator_desc regulators[] = {
534 .ops = &max8998_ldo_ops,
535 .type = REGULATOR_VOLTAGE,
536 .owner = THIS_MODULE,
540 .ops = &max8998_ldo_ops,
541 .type = REGULATOR_VOLTAGE,
542 .owner = THIS_MODULE,
546 .ops = &max8998_ldo_ops,
547 .type = REGULATOR_VOLTAGE,
548 .owner = THIS_MODULE,
552 .ops = &max8998_ldo_ops,
553 .type = REGULATOR_VOLTAGE,
554 .owner = THIS_MODULE,
558 .ops = &max8998_ldo_ops,
559 .type = REGULATOR_VOLTAGE,
560 .owner = THIS_MODULE,
564 .ops = &max8998_ldo_ops,
565 .type = REGULATOR_VOLTAGE,
566 .owner = THIS_MODULE,
570 .ops = &max8998_ldo_ops,
571 .type = REGULATOR_VOLTAGE,
572 .owner = THIS_MODULE,
576 .ops = &max8998_ldo_ops,
577 .type = REGULATOR_VOLTAGE,
578 .owner = THIS_MODULE,
582 .ops = &max8998_ldo_ops,
583 .type = REGULATOR_VOLTAGE,
584 .owner = THIS_MODULE,
588 .ops = &max8998_ldo_ops,
589 .type = REGULATOR_VOLTAGE,
590 .owner = THIS_MODULE,
594 .ops = &max8998_ldo_ops,
595 .type = REGULATOR_VOLTAGE,
596 .owner = THIS_MODULE,
600 .ops = &max8998_ldo_ops,
601 .type = REGULATOR_VOLTAGE,
602 .owner = THIS_MODULE,
606 .ops = &max8998_ldo_ops,
607 .type = REGULATOR_VOLTAGE,
608 .owner = THIS_MODULE,
612 .ops = &max8998_ldo_ops,
613 .type = REGULATOR_VOLTAGE,
614 .owner = THIS_MODULE,
618 .ops = &max8998_ldo_ops,
619 .type = REGULATOR_VOLTAGE,
620 .owner = THIS_MODULE,
624 .ops = &max8998_ldo_ops,
625 .type = REGULATOR_VOLTAGE,
626 .owner = THIS_MODULE,
630 .ops = &max8998_buck_ops,
631 .type = REGULATOR_VOLTAGE,
632 .owner = THIS_MODULE,
636 .ops = &max8998_buck_ops,
637 .type = REGULATOR_VOLTAGE,
638 .owner = THIS_MODULE,
642 .ops = &max8998_buck_ops,
643 .type = REGULATOR_VOLTAGE,
644 .owner = THIS_MODULE,
648 .ops = &max8998_buck_ops,
649 .type = REGULATOR_VOLTAGE,
650 .owner = THIS_MODULE,
652 .name = "EN32KHz AP",
653 .id = MAX8998_EN32KHZ_AP,
654 .ops = &max8998_others_ops,
655 .type = REGULATOR_VOLTAGE,
656 .owner = THIS_MODULE,
658 .name = "EN32KHz CP",
659 .id = MAX8998_EN32KHZ_CP,
660 .ops = &max8998_others_ops,
661 .type = REGULATOR_VOLTAGE,
662 .owner = THIS_MODULE,
665 .id = MAX8998_ENVICHG,
666 .ops = &max8998_others_ops,
667 .type = REGULATOR_VOLTAGE,
668 .owner = THIS_MODULE,
671 .id = MAX8998_ESAFEOUT1,
672 .ops = &max8998_others_ops,
673 .type = REGULATOR_VOLTAGE,
674 .owner = THIS_MODULE,
677 .id = MAX8998_ESAFEOUT2,
678 .ops = &max8998_others_ops,
679 .type = REGULATOR_VOLTAGE,
680 .owner = THIS_MODULE,
684 static __devinit int max8998_pmic_probe(struct platform_device *pdev)
686 struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
687 struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev);
688 struct regulator_dev **rdev;
689 struct max8998_data *max8998;
690 struct i2c_client *i2c;
694 dev_err(pdev->dev.parent, "No platform init data supplied\n");
698 max8998 = kzalloc(sizeof(struct max8998_data), GFP_KERNEL);
702 size = sizeof(struct regulator_dev *) * pdata->num_regulators;
703 max8998->rdev = kzalloc(size, GFP_KERNEL);
704 if (!max8998->rdev) {
709 rdev = max8998->rdev;
710 max8998->dev = &pdev->dev;
711 max8998->iodev = iodev;
712 max8998->num_regulators = pdata->num_regulators;
713 platform_set_drvdata(pdev, max8998);
714 i2c = max8998->iodev->i2c;
716 max8998->buck1_idx = pdata->buck1_default_idx;
717 max8998->buck2_idx = pdata->buck2_default_idx;
720 /* For unused GPIO NOT marked as -1 (thereof equal to 0) WARN_ON */
721 /* will be displayed */
723 /* Check if MAX8998 voltage selection GPIOs are defined */
724 if (gpio_is_valid(pdata->buck1_set1) &&
725 gpio_is_valid(pdata->buck1_set2)) {
726 /* Check if SET1 is not equal to 0 */
727 if (!pdata->buck1_set1) {
728 printk(KERN_ERR "MAX8998 SET1 GPIO defined as 0 !\n");
729 WARN_ON(!pdata->buck1_set1);
733 /* Check if SET2 is not equal to 0 */
734 if (!pdata->buck1_set2) {
735 printk(KERN_ERR "MAX8998 SET2 GPIO defined as 0 !\n");
736 WARN_ON(!pdata->buck1_set2);
741 gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1");
742 gpio_direction_output(pdata->buck1_set1,
743 max8998->buck1_idx & 0x1);
746 gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2");
747 gpio_direction_output(pdata->buck1_set2,
748 (max8998->buck1_idx >> 1) & 0x1);
749 /* Set predefined value for BUCK1 register 1 */
751 while (buck12_voltage_map_desc.min +
752 buck12_voltage_map_desc.step*i
753 < (pdata->buck1_voltage1 / 1000))
755 max8998->buck1_vol[0] = i;
756 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE1, i);
760 /* Set predefined value for BUCK1 register 2 */
762 while (buck12_voltage_map_desc.min +
763 buck12_voltage_map_desc.step*i
764 < (pdata->buck1_voltage2 / 1000))
767 max8998->buck1_vol[1] = i;
768 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE2, i);
772 /* Set predefined value for BUCK1 register 3 */
774 while (buck12_voltage_map_desc.min +
775 buck12_voltage_map_desc.step*i
776 < (pdata->buck1_voltage3 / 1000))
779 max8998->buck1_vol[2] = i;
780 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE3, i);
784 /* Set predefined value for BUCK1 register 4 */
786 while (buck12_voltage_map_desc.min +
787 buck12_voltage_map_desc.step*i
788 < (pdata->buck1_voltage4 / 1000))
791 max8998->buck1_vol[3] = i;
792 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE4, i);
798 if (gpio_is_valid(pdata->buck2_set3)) {
799 /* Check if SET3 is not equal to 0 */
800 if (!pdata->buck2_set3) {
801 printk(KERN_ERR "MAX8998 SET3 GPIO defined as 0 !\n");
802 WARN_ON(!pdata->buck2_set3);
806 gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3");
807 gpio_direction_output(pdata->buck2_set3,
808 max8998->buck2_idx & 0x1);
810 /* BUCK2 register 1 */
812 while (buck12_voltage_map_desc.min +
813 buck12_voltage_map_desc.step*i
814 < (pdata->buck2_voltage1 / 1000))
816 max8998->buck2_vol[0] = i;
817 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE1, i);
821 /* BUCK2 register 2 */
823 while (buck12_voltage_map_desc.min +
824 buck12_voltage_map_desc.step*i
825 < (pdata->buck2_voltage2 / 1000))
827 max8998->buck2_vol[1] = i;
828 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE2, i);
833 for (i = 0; i < pdata->num_regulators; i++) {
834 const struct voltage_map_desc *desc;
835 int id = pdata->regulators[i].id;
836 int index = id - MAX8998_LDO2;
838 desc = ldo_voltage_map[id];
839 if (desc && regulators[index].ops != &max8998_others_ops) {
840 int count = (desc->max - desc->min) / desc->step + 1;
841 regulators[index].n_voltages = count;
843 rdev[i] = regulator_register(®ulators[index], max8998->dev,
844 pdata->regulators[i].initdata, max8998, NULL);
845 if (IS_ERR(rdev[i])) {
846 ret = PTR_ERR(rdev[i]);
847 dev_err(max8998->dev, "regulator init failed\n");
856 for (i = 0; i < max8998->num_regulators; i++)
858 regulator_unregister(rdev[i]);
861 kfree(max8998->rdev);
867 static int __devexit max8998_pmic_remove(struct platform_device *pdev)
869 struct max8998_data *max8998 = platform_get_drvdata(pdev);
870 struct regulator_dev **rdev = max8998->rdev;
873 for (i = 0; i < max8998->num_regulators; i++)
875 regulator_unregister(rdev[i]);
877 kfree(max8998->rdev);
883 static const struct platform_device_id max8998_pmic_id[] = {
884 { "max8998-pmic", TYPE_MAX8998 },
885 { "lp3974-pmic", TYPE_LP3974 },
888 MODULE_DEVICE_TABLE(platform, max8998_pmic_id);
890 static struct platform_driver max8998_pmic_driver = {
892 .name = "max8998-pmic",
893 .owner = THIS_MODULE,
895 .probe = max8998_pmic_probe,
896 .remove = __devexit_p(max8998_pmic_remove),
897 .id_table = max8998_pmic_id,
900 static int __init max8998_pmic_init(void)
902 return platform_driver_register(&max8998_pmic_driver);
904 subsys_initcall(max8998_pmic_init);
906 static void __exit max8998_pmic_cleanup(void)
908 platform_driver_unregister(&max8998_pmic_driver);
910 module_exit(max8998_pmic_cleanup);
912 MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver");
913 MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
914 MODULE_LICENSE("GPL");