2 * max8997.c - Regulator driver for the Maxim 8997/8966
4 * Copyright (C) 2011 Samsung Electronics
5 * MyungJoo Ham <myungjoo.ham@smasung.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 * This driver is based on max8998.c
24 #include <linux/bug.h>
25 #include <linux/delay.h>
26 #include <linux/err.h>
27 #include <linux/gpio.h>
28 #include <linux/slab.h>
29 #include <linux/platform_device.h>
30 #include <linux/regulator/driver.h>
31 #include <linux/regulator/machine.h>
32 #include <linux/mfd/max8997.h>
33 #include <linux/mfd/max8997-private.h>
37 struct max8997_dev *iodev;
39 struct regulator_dev **rdev;
40 int ramp_delay; /* in mV/us */
45 int buck125_gpioindex;
47 u8 saved_states[MAX8997_REG_MAX];
50 static inline void max8997_set_gpio(struct max8997_data *max8997)
52 struct max8997_platform_data *pdata =
53 dev_get_platdata(max8997->iodev->dev);
54 int set3 = (max8997->buck125_gpioindex) & 0x1;
55 int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1;
56 int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1;
58 gpio_set_value(pdata->buck125_gpios[0], set1);
59 gpio_set_value(pdata->buck125_gpios[1], set2);
60 gpio_set_value(pdata->buck125_gpios[2], set3);
63 struct voltage_map_desc {
70 /* Voltage maps in mV */
71 static const struct voltage_map_desc ldo_voltage_map_desc = {
72 .min = 800, .max = 3950, .step = 50, .n_bits = 6,
73 }; /* LDO1 ~ 18, 21 all */
75 static const struct voltage_map_desc buck1245_voltage_map_desc = {
76 .min = 650, .max = 2225, .step = 25, .n_bits = 6,
77 }; /* Buck1, 2, 4, 5 */
79 static const struct voltage_map_desc buck37_voltage_map_desc = {
80 .min = 750, .max = 3900, .step = 50, .n_bits = 6,
83 /* current map in mA */
84 static const struct voltage_map_desc charger_current_map_desc = {
85 .min = 200, .max = 950, .step = 50, .n_bits = 4,
88 static const struct voltage_map_desc topoff_current_map_desc = {
89 .min = 50, .max = 200, .step = 10, .n_bits = 4,
92 static const struct voltage_map_desc *reg_voltage_map[] = {
93 [MAX8997_LDO1] = &ldo_voltage_map_desc,
94 [MAX8997_LDO2] = &ldo_voltage_map_desc,
95 [MAX8997_LDO3] = &ldo_voltage_map_desc,
96 [MAX8997_LDO4] = &ldo_voltage_map_desc,
97 [MAX8997_LDO5] = &ldo_voltage_map_desc,
98 [MAX8997_LDO6] = &ldo_voltage_map_desc,
99 [MAX8997_LDO7] = &ldo_voltage_map_desc,
100 [MAX8997_LDO8] = &ldo_voltage_map_desc,
101 [MAX8997_LDO9] = &ldo_voltage_map_desc,
102 [MAX8997_LDO10] = &ldo_voltage_map_desc,
103 [MAX8997_LDO11] = &ldo_voltage_map_desc,
104 [MAX8997_LDO12] = &ldo_voltage_map_desc,
105 [MAX8997_LDO13] = &ldo_voltage_map_desc,
106 [MAX8997_LDO14] = &ldo_voltage_map_desc,
107 [MAX8997_LDO15] = &ldo_voltage_map_desc,
108 [MAX8997_LDO16] = &ldo_voltage_map_desc,
109 [MAX8997_LDO17] = &ldo_voltage_map_desc,
110 [MAX8997_LDO18] = &ldo_voltage_map_desc,
111 [MAX8997_LDO21] = &ldo_voltage_map_desc,
112 [MAX8997_BUCK1] = &buck1245_voltage_map_desc,
113 [MAX8997_BUCK2] = &buck1245_voltage_map_desc,
114 [MAX8997_BUCK3] = &buck37_voltage_map_desc,
115 [MAX8997_BUCK4] = &buck1245_voltage_map_desc,
116 [MAX8997_BUCK5] = &buck1245_voltage_map_desc,
117 [MAX8997_BUCK6] = NULL,
118 [MAX8997_BUCK7] = &buck37_voltage_map_desc,
119 [MAX8997_EN32KHZ_AP] = NULL,
120 [MAX8997_EN32KHZ_CP] = NULL,
121 [MAX8997_ENVICHG] = NULL,
122 [MAX8997_ESAFEOUT1] = NULL,
123 [MAX8997_ESAFEOUT2] = NULL,
124 [MAX8997_CHARGER_CV] = NULL,
125 [MAX8997_CHARGER] = &charger_current_map_desc,
126 [MAX8997_CHARGER_TOPOFF] = &topoff_current_map_desc,
129 static inline int max8997_get_rid(struct regulator_dev *rdev)
131 return rdev_get_id(rdev);
134 static int max8997_list_voltage_safeout(struct regulator_dev *rdev,
135 unsigned int selector)
137 int rid = max8997_get_rid(rdev);
139 if (rid == MAX8997_ESAFEOUT1 || rid == MAX8997_ESAFEOUT2) {
157 static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev,
158 unsigned int selector)
160 int rid = max8997_get_rid(rdev);
162 if (rid != MAX8997_CHARGER_CV)
169 return 4000000 + 20000 * (selector - 0x01);
179 static int max8997_list_voltage(struct regulator_dev *rdev,
180 unsigned int selector)
182 const struct voltage_map_desc *desc;
183 int rid = max8997_get_rid(rdev);
186 if (rid >= ARRAY_SIZE(reg_voltage_map) ||
190 desc = reg_voltage_map[rid];
194 val = desc->min + desc->step * selector;
201 static int max8997_get_enable_register(struct regulator_dev *rdev,
202 int *reg, int *mask, int *pattern)
204 int rid = max8997_get_rid(rdev);
207 case MAX8997_LDO1 ... MAX8997_LDO21:
208 *reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1);
213 *reg = MAX8997_REG_BUCK1CTRL;
218 *reg = MAX8997_REG_BUCK2CTRL;
223 *reg = MAX8997_REG_BUCK3CTRL;
228 *reg = MAX8997_REG_BUCK4CTRL;
233 *reg = MAX8997_REG_BUCK5CTRL;
238 *reg = MAX8997_REG_BUCK6CTRL;
243 *reg = MAX8997_REG_BUCK7CTRL;
247 case MAX8997_EN32KHZ_AP ... MAX8997_EN32KHZ_CP:
248 *reg = MAX8997_REG_MAINCON1;
249 *mask = 0x01 << (rid - MAX8997_EN32KHZ_AP);
250 *pattern = 0x01 << (rid - MAX8997_EN32KHZ_AP);
252 case MAX8997_ENVICHG:
253 *reg = MAX8997_REG_MBCCTRL1;
257 case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2:
258 *reg = MAX8997_REG_SAFEOUTCTRL;
259 *mask = 0x40 << (rid - MAX8997_ESAFEOUT1);
260 *pattern = 0x40 << (rid - MAX8997_ESAFEOUT1);
262 case MAX8997_CHARGER:
263 *reg = MAX8997_REG_MBCCTRL2;
268 /* Not controllable or not exists */
276 static int max8997_reg_is_enabled(struct regulator_dev *rdev)
278 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
279 struct i2c_client *i2c = max8997->iodev->i2c;
280 int ret, reg, mask, pattern;
283 ret = max8997_get_enable_register(rdev, ®, &mask, &pattern);
285 return 1; /* "not controllable" */
289 ret = max8997_read_reg(i2c, reg, &val);
293 return (val & mask) == pattern;
296 static int max8997_reg_enable(struct regulator_dev *rdev)
298 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
299 struct i2c_client *i2c = max8997->iodev->i2c;
300 int ret, reg, mask, pattern;
302 ret = max8997_get_enable_register(rdev, ®, &mask, &pattern);
306 return max8997_update_reg(i2c, reg, pattern, mask);
309 static int max8997_reg_disable(struct regulator_dev *rdev)
311 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
312 struct i2c_client *i2c = max8997->iodev->i2c;
313 int ret, reg, mask, pattern;
315 ret = max8997_get_enable_register(rdev, ®, &mask, &pattern);
319 return max8997_update_reg(i2c, reg, ~pattern, mask);
322 static int max8997_get_voltage_register(struct regulator_dev *rdev,
323 int *_reg, int *_shift, int *_mask)
325 int rid = max8997_get_rid(rdev);
326 int reg, shift = 0, mask = 0x3f;
329 case MAX8997_LDO1 ... MAX8997_LDO21:
330 reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1);
333 reg = MAX8997_REG_BUCK1DVS1;
336 reg = MAX8997_REG_BUCK2DVS1;
339 reg = MAX8997_REG_BUCK3DVS;
342 reg = MAX8997_REG_BUCK4DVS;
345 reg = MAX8997_REG_BUCK5DVS1;
348 reg = MAX8997_REG_BUCK7DVS;
350 case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2:
351 reg = MAX8997_REG_SAFEOUTCTRL;
352 shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0;
355 case MAX8997_CHARGER_CV:
356 reg = MAX8997_REG_MBCCTRL3;
360 case MAX8997_CHARGER:
361 reg = MAX8997_REG_MBCCTRL4;
365 case MAX8997_CHARGER_TOPOFF:
366 reg = MAX8997_REG_MBCCTRL5;
381 static int max8997_get_voltage(struct regulator_dev *rdev)
383 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
384 struct max8997_platform_data *pdata =
385 dev_get_platdata(max8997->iodev->dev);
386 struct i2c_client *i2c = max8997->iodev->i2c;
387 int reg, shift, mask, ret;
388 int rid = max8997_get_rid(rdev);
391 ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
395 if ((rid == MAX8997_BUCK1 && pdata->buck1_gpiodvs) ||
396 (rid == MAX8997_BUCK2 && pdata->buck2_gpiodvs) ||
397 (rid == MAX8997_BUCK5 && pdata->buck5_gpiodvs))
398 reg += max8997->buck125_gpioindex;
400 ret = max8997_read_reg(i2c, reg, &val);
407 if (rdev->desc && rdev->desc->ops && rdev->desc->ops->list_voltage)
408 return rdev->desc->ops->list_voltage(rdev, val);
411 * max8997_list_voltage returns value for any rdev with voltage_map,
412 * which works for "CHARGER" and "CHARGER TOPOFF" that do not have
413 * list_voltage ops (they are current regulators).
415 return max8997_list_voltage(rdev, val);
418 static inline int max8997_get_voltage_proper_val(
419 const struct voltage_map_desc *desc,
420 int min_vol, int max_vol)
427 if (max_vol < desc->min || min_vol > desc->max)
430 while (desc->min + desc->step * i < min_vol &&
431 desc->min + desc->step * i < desc->max)
434 if (desc->min + desc->step * i > max_vol)
437 if (i >= (1 << desc->n_bits))
443 static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev,
444 int min_uV, int max_uV, unsigned *selector)
446 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
447 struct i2c_client *i2c = max8997->iodev->i2c;
448 int rid = max8997_get_rid(rdev);
450 int reg, shift = 0, mask, ret = 0;
453 if (rid != MAX8997_CHARGER_CV)
456 ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
460 if (max_uV < 4000000 || min_uV > 4350000)
463 if (min_uV <= 4000000) {
464 if (max_uV >= 4000000)
468 } else if (min_uV <= 4200000 && max_uV >= 4200000)
471 lb = (min_uV - 4000001) / 20000 + 2;
472 ub = (max_uV - 4000000) / 20000 + 1;
489 ret = max8997_update_reg(i2c, reg, val << shift, mask);
495 * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF
496 * BUCK1, 2, and 5 are available if they are not controlled by gpio
498 static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev,
499 int min_uV, int max_uV, unsigned *selector)
501 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
502 struct i2c_client *i2c = max8997->iodev->i2c;
503 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
504 const struct voltage_map_desc *desc;
505 int rid = max8997_get_rid(rdev);
506 int reg, shift = 0, mask, ret;
511 case MAX8997_LDO1 ... MAX8997_LDO21:
513 case MAX8997_BUCK1 ... MAX8997_BUCK5:
519 case MAX8997_CHARGER:
521 case MAX8997_CHARGER_TOPOFF:
527 desc = reg_voltage_map[rid];
529 i = max8997_get_voltage_proper_val(desc, min_vol, max_vol);
533 ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
537 max8997_read_reg(i2c, reg, &org);
538 org = (org & mask) >> shift;
540 ret = max8997_update_reg(i2c, reg, i << shift, mask << shift);
543 if (rid == MAX8997_BUCK1 || rid == MAX8997_BUCK2 ||
544 rid == MAX8997_BUCK4 || rid == MAX8997_BUCK5) {
545 /* If the voltage is increasing */
547 udelay(desc->step * (i - org) / max8997->ramp_delay);
554 * Assess the damage on the voltage setting of BUCK1,2,5 by the change.
556 * When GPIO-DVS mode is used for multiple bucks, changing the voltage value
557 * of one of the bucks may affect that of another buck, which is the side
558 * effect of the change (set_voltage). This function examines the GPIO-DVS
559 * configurations and checks whether such side-effect exists.
561 static int max8997_assess_side_effect(struct regulator_dev *rdev,
562 u8 new_val, int *best)
564 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
565 struct max8997_platform_data *pdata =
566 dev_get_platdata(max8997->iodev->dev);
567 int rid = max8997_get_rid(rdev);
569 bool buckx_gpiodvs[3];
571 int min_side_effect = INT_MAX;
590 buckx_val[0] = max8997->buck1_vol;
591 buckx_val[1] = max8997->buck2_vol;
592 buckx_val[2] = max8997->buck5_vol;
593 buckx_gpiodvs[0] = pdata->buck1_gpiodvs;
594 buckx_gpiodvs[1] = pdata->buck2_gpiodvs;
595 buckx_gpiodvs[2] = pdata->buck5_gpiodvs;
597 for (i = 0; i < 8; i++) {
600 if (new_val != (buckx_val[rid])[i]) {
606 for (others = 0; others < 3; others++) {
611 if (buckx_gpiodvs[others] == false)
612 continue; /* Not affected */
613 diff = (buckx_val[others])[i] -
614 (buckx_val[others])[max8997->buck125_gpioindex];
616 side_effect[i] += diff;
618 side_effect[i] -= diff;
620 if (side_effect[i] == 0) {
622 return 0; /* NO SIDE EFFECT! Use This! */
624 if (side_effect[i] < min_side_effect) {
625 min_side_effect = side_effect[i];
633 return side_effect[*best];
637 * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls
638 * max8997_set_voltage_ldobuck to do the job.
640 static int max8997_set_voltage_buck(struct regulator_dev *rdev,
641 int min_uV, int max_uV, unsigned *selector)
643 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
644 struct max8997_platform_data *pdata =
645 dev_get_platdata(max8997->iodev->dev);
646 int rid = max8997_get_rid(rdev);
647 const struct voltage_map_desc *desc;
648 int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg;
649 bool gpio_dvs_mode = false;
650 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
652 if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7)
657 if (pdata->buck1_gpiodvs)
658 gpio_dvs_mode = true;
661 if (pdata->buck2_gpiodvs)
662 gpio_dvs_mode = true;
665 if (pdata->buck5_gpiodvs)
666 gpio_dvs_mode = true;
671 return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV,
674 desc = reg_voltage_map[rid];
675 new_val = max8997_get_voltage_proper_val(desc, min_vol, max_vol);
683 damage = max8997_assess_side_effect(rdev, new_val, &new_idx);
687 if (tmp_dmg > damage) {
694 } while (desc->min + desc->step + new_val <= desc->max);
699 if (pdata->ignore_gpiodvs_side_effect == false)
702 dev_warn(&rdev->dev, "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET:"
703 " %d -> %d\n", max8997->buck125_gpioindex, tmp_idx);
706 if (new_idx < 0 || new_val < 0)
709 max8997->buck125_gpioindex = new_idx;
710 max8997_set_gpio(max8997);
716 static const int safeoutvolt[] = {
723 /* For SAFEOUT1 and SAFEOUT2 */
724 static int max8997_set_voltage_safeout(struct regulator_dev *rdev,
725 int min_uV, int max_uV, unsigned *selector)
727 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
728 struct i2c_client *i2c = max8997->iodev->i2c;
729 int rid = max8997_get_rid(rdev);
730 int reg, shift = 0, mask, ret;
734 if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2)
737 for (i = 0; i < ARRAY_SIZE(safeoutvolt); i++) {
738 if (min_uV <= safeoutvolt[i] &&
739 max_uV >= safeoutvolt[i])
743 if (i >= ARRAY_SIZE(safeoutvolt))
751 ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
755 ret = max8997_update_reg(i2c, reg, val << shift, mask << shift);
761 static int max8997_reg_enable_suspend(struct regulator_dev *rdev)
766 static int max8997_reg_disable_suspend(struct regulator_dev *rdev)
768 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
769 struct i2c_client *i2c = max8997->iodev->i2c;
770 int ret, reg, mask, pattern;
771 int rid = max8997_get_rid(rdev);
773 ret = max8997_get_enable_register(rdev, ®, &mask, &pattern);
777 max8997_read_reg(i2c, reg, &max8997->saved_states[rid]);
779 if (rid == MAX8997_LDO1 ||
780 rid == MAX8997_LDO10 ||
781 rid == MAX8997_LDO21) {
782 dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n",
784 return max8997_update_reg(i2c, reg, 0x40, mask);
787 dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n",
788 rdev->desc->name, max8997->saved_states[rid] & mask,
790 return max8997_update_reg(i2c, reg, ~pattern, mask);
793 static struct regulator_ops max8997_ldo_ops = {
794 .list_voltage = max8997_list_voltage,
795 .is_enabled = max8997_reg_is_enabled,
796 .enable = max8997_reg_enable,
797 .disable = max8997_reg_disable,
798 .get_voltage = max8997_get_voltage,
799 .set_voltage = max8997_set_voltage_ldobuck,
800 .set_suspend_enable = max8997_reg_enable_suspend,
801 .set_suspend_disable = max8997_reg_disable_suspend,
804 static struct regulator_ops max8997_buck_ops = {
805 .list_voltage = max8997_list_voltage,
806 .is_enabled = max8997_reg_is_enabled,
807 .enable = max8997_reg_enable,
808 .disable = max8997_reg_disable,
809 .get_voltage = max8997_get_voltage,
810 .set_voltage = max8997_set_voltage_buck,
811 .set_suspend_enable = max8997_reg_enable_suspend,
812 .set_suspend_disable = max8997_reg_disable_suspend,
815 static struct regulator_ops max8997_fixedvolt_ops = {
816 .list_voltage = max8997_list_voltage,
817 .is_enabled = max8997_reg_is_enabled,
818 .enable = max8997_reg_enable,
819 .disable = max8997_reg_disable,
820 .set_suspend_enable = max8997_reg_enable_suspend,
821 .set_suspend_disable = max8997_reg_disable_suspend,
824 static struct regulator_ops max8997_safeout_ops = {
825 .list_voltage = max8997_list_voltage_safeout,
826 .is_enabled = max8997_reg_is_enabled,
827 .enable = max8997_reg_enable,
828 .disable = max8997_reg_disable,
829 .get_voltage = max8997_get_voltage,
830 .set_voltage = max8997_set_voltage_safeout,
831 .set_suspend_enable = max8997_reg_enable_suspend,
832 .set_suspend_disable = max8997_reg_disable_suspend,
835 static struct regulator_ops max8997_fixedstate_ops = {
836 .list_voltage = max8997_list_voltage_charger_cv,
837 .get_voltage = max8997_get_voltage,
838 .set_voltage = max8997_set_voltage_charger_cv,
841 static int max8997_set_voltage_ldobuck_wrap(struct regulator_dev *rdev,
842 int min_uV, int max_uV)
846 return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, &dummy);
850 static struct regulator_ops max8997_charger_ops = {
851 .is_enabled = max8997_reg_is_enabled,
852 .enable = max8997_reg_enable,
853 .disable = max8997_reg_disable,
854 .get_current_limit = max8997_get_voltage,
855 .set_current_limit = max8997_set_voltage_ldobuck_wrap,
858 static struct regulator_ops max8997_charger_fixedstate_ops = {
859 .is_enabled = max8997_reg_is_enabled,
860 .get_current_limit = max8997_get_voltage,
861 .set_current_limit = max8997_set_voltage_ldobuck_wrap,
864 #define regulator_desc_ldo(num) { \
866 .id = MAX8997_LDO##num, \
867 .ops = &max8997_ldo_ops, \
868 .type = REGULATOR_VOLTAGE, \
869 .owner = THIS_MODULE, \
871 #define regulator_desc_buck(num) { \
872 .name = "BUCK"#num, \
873 .id = MAX8997_BUCK##num, \
874 .ops = &max8997_buck_ops, \
875 .type = REGULATOR_VOLTAGE, \
876 .owner = THIS_MODULE, \
879 static struct regulator_desc regulators[] = {
880 regulator_desc_ldo(1),
881 regulator_desc_ldo(2),
882 regulator_desc_ldo(3),
883 regulator_desc_ldo(4),
884 regulator_desc_ldo(5),
885 regulator_desc_ldo(6),
886 regulator_desc_ldo(7),
887 regulator_desc_ldo(8),
888 regulator_desc_ldo(9),
889 regulator_desc_ldo(10),
890 regulator_desc_ldo(11),
891 regulator_desc_ldo(12),
892 regulator_desc_ldo(13),
893 regulator_desc_ldo(14),
894 regulator_desc_ldo(15),
895 regulator_desc_ldo(16),
896 regulator_desc_ldo(17),
897 regulator_desc_ldo(18),
898 regulator_desc_ldo(21),
899 regulator_desc_buck(1),
900 regulator_desc_buck(2),
901 regulator_desc_buck(3),
902 regulator_desc_buck(4),
903 regulator_desc_buck(5),
907 .ops = &max8997_fixedvolt_ops,
908 .type = REGULATOR_VOLTAGE,
909 .owner = THIS_MODULE,
911 regulator_desc_buck(7),
913 .name = "EN32KHz AP",
914 .id = MAX8997_EN32KHZ_AP,
915 .ops = &max8997_fixedvolt_ops,
916 .type = REGULATOR_VOLTAGE,
917 .owner = THIS_MODULE,
919 .name = "EN32KHz CP",
920 .id = MAX8997_EN32KHZ_CP,
921 .ops = &max8997_fixedvolt_ops,
922 .type = REGULATOR_VOLTAGE,
923 .owner = THIS_MODULE,
926 .id = MAX8997_ENVICHG,
927 .ops = &max8997_fixedvolt_ops,
928 .type = REGULATOR_VOLTAGE,
929 .owner = THIS_MODULE,
932 .id = MAX8997_ESAFEOUT1,
933 .ops = &max8997_safeout_ops,
934 .type = REGULATOR_VOLTAGE,
935 .owner = THIS_MODULE,
938 .id = MAX8997_ESAFEOUT2,
939 .ops = &max8997_safeout_ops,
940 .type = REGULATOR_VOLTAGE,
941 .owner = THIS_MODULE,
943 .name = "CHARGER CV",
944 .id = MAX8997_CHARGER_CV,
945 .ops = &max8997_fixedstate_ops,
946 .type = REGULATOR_VOLTAGE,
947 .owner = THIS_MODULE,
950 .id = MAX8997_CHARGER,
951 .ops = &max8997_charger_ops,
952 .type = REGULATOR_CURRENT,
953 .owner = THIS_MODULE,
955 .name = "CHARGER TOPOFF",
956 .id = MAX8997_CHARGER_TOPOFF,
957 .ops = &max8997_charger_fixedstate_ops,
958 .type = REGULATOR_CURRENT,
959 .owner = THIS_MODULE,
963 static __devinit int max8997_pmic_probe(struct platform_device *pdev)
965 struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
966 struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev);
967 struct regulator_dev **rdev;
968 struct max8997_data *max8997;
969 struct i2c_client *i2c;
971 u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0;
974 dev_err(pdev->dev.parent, "No platform init data supplied.\n");
978 max8997 = kzalloc(sizeof(struct max8997_data), GFP_KERNEL);
982 size = sizeof(struct regulator_dev *) * pdata->num_regulators;
983 max8997->rdev = kzalloc(size, GFP_KERNEL);
984 if (!max8997->rdev) {
989 rdev = max8997->rdev;
990 max8997->dev = &pdev->dev;
991 max8997->iodev = iodev;
992 max8997->num_regulators = pdata->num_regulators;
993 platform_set_drvdata(pdev, max8997);
994 i2c = max8997->iodev->i2c;
996 max8997->buck125_gpioindex = pdata->buck125_default_idx;
998 for (i = 0; i < 8; i++) {
999 max8997->buck1_vol[i] = ret =
1000 max8997_get_voltage_proper_val(
1001 &buck1245_voltage_map_desc,
1002 pdata->buck1_voltage[i] / 1000,
1003 pdata->buck1_voltage[i] / 1000 +
1004 buck1245_voltage_map_desc.step);
1008 max8997->buck2_vol[i] = ret =
1009 max8997_get_voltage_proper_val(
1010 &buck1245_voltage_map_desc,
1011 pdata->buck2_voltage[i] / 1000,
1012 pdata->buck2_voltage[i] / 1000 +
1013 buck1245_voltage_map_desc.step);
1017 max8997->buck5_vol[i] = ret =
1018 max8997_get_voltage_proper_val(
1019 &buck1245_voltage_map_desc,
1020 pdata->buck5_voltage[i] / 1000,
1021 pdata->buck5_voltage[i] / 1000 +
1022 buck1245_voltage_map_desc.step);
1026 if (max_buck1 < max8997->buck1_vol[i])
1027 max_buck1 = max8997->buck1_vol[i];
1028 if (max_buck2 < max8997->buck2_vol[i])
1029 max_buck2 = max8997->buck2_vol[i];
1030 if (max_buck5 < max8997->buck5_vol[i])
1031 max_buck5 = max8997->buck5_vol[i];
1034 /* For the safety, set max voltage before setting up */
1035 for (i = 0; i < 8; i++) {
1036 max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS(i + 1),
1038 max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS(i + 1),
1040 max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS(i + 1),
1045 * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them.
1046 * If at least one of them cares, set gpios.
1048 if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
1049 pdata->buck5_gpiodvs) {
1050 bool gpio1set = false, gpio2set = false;
1052 if (!gpio_is_valid(pdata->buck125_gpios[0]) ||
1053 !gpio_is_valid(pdata->buck125_gpios[1]) ||
1054 !gpio_is_valid(pdata->buck125_gpios[2])) {
1055 dev_err(&pdev->dev, "GPIO NOT VALID\n");
1060 ret = gpio_request(pdata->buck125_gpios[0],
1063 dev_warn(&pdev->dev, "Duplicated gpio request"
1070 ret = gpio_request(pdata->buck125_gpios[1],
1073 dev_warn(&pdev->dev, "Duplicated gpio request"
1077 gpio_free(pdata->buck125_gpios[0]);
1082 ret = gpio_request(pdata->buck125_gpios[2],
1085 dev_warn(&pdev->dev, "Duplicated gpio request"
1089 gpio_free(pdata->buck125_gpios[0]);
1091 gpio_free(pdata->buck125_gpios[1]);
1095 gpio_direction_output(pdata->buck125_gpios[0],
1096 (max8997->buck125_gpioindex >> 2)
1098 gpio_direction_output(pdata->buck125_gpios[1],
1099 (max8997->buck125_gpioindex >> 1)
1101 gpio_direction_output(pdata->buck125_gpios[2],
1102 (max8997->buck125_gpioindex >> 0)
1107 /* DVS-GPIO disabled */
1108 max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ?
1109 (1 << 1) : (0 << 1), 1 << 1);
1110 max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ?
1111 (1 << 1) : (0 << 1), 1 << 1);
1112 max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ?
1113 (1 << 1) : (0 << 1), 1 << 1);
1115 /* Initialize all the DVS related BUCK registers */
1116 for (i = 0; i < 8; i++) {
1117 max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS(i + 1),
1118 max8997->buck1_vol[i],
1120 max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS(i + 1),
1121 max8997->buck2_vol[i],
1123 max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS(i + 1),
1124 max8997->buck5_vol[i],
1128 for (i = 0; i < pdata->num_regulators; i++) {
1129 const struct voltage_map_desc *desc;
1130 int id = pdata->regulators[i].id;
1132 desc = reg_voltage_map[id];
1134 regulators[id].n_voltages =
1135 (desc->max - desc->min) / desc->step + 1;
1136 else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2)
1137 regulators[id].n_voltages = 4;
1138 else if (id == MAX8997_CHARGER_CV)
1139 regulators[id].n_voltages = 16;
1141 rdev[i] = regulator_register(®ulators[id], max8997->dev,
1142 pdata->regulators[i].initdata, max8997);
1143 if (IS_ERR(rdev[i])) {
1144 ret = PTR_ERR(rdev[i]);
1145 dev_err(max8997->dev, "regulator init failed for %d\n",
1153 max8997->ramp_delay = 10; /* set 10mV/us, which is the default */
1154 max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9);
1158 for (i = 0; i < max8997->num_regulators; i++)
1160 regulator_unregister(rdev[i]);
1162 kfree(max8997->rdev);
1168 static int __devexit max8997_pmic_remove(struct platform_device *pdev)
1170 struct max8997_data *max8997 = platform_get_drvdata(pdev);
1171 struct regulator_dev **rdev = max8997->rdev;
1174 for (i = 0; i < max8997->num_regulators; i++)
1176 regulator_unregister(rdev[i]);
1178 kfree(max8997->rdev);
1184 static const struct platform_device_id max8997_pmic_id[] = {
1185 { "max8997-pmic", 0},
1188 MODULE_DEVICE_TABLE(platform, max8997_pmic_id);
1190 static struct platform_driver max8997_pmic_driver = {
1192 .name = "max8997-pmic",
1193 .owner = THIS_MODULE,
1195 .probe = max8997_pmic_probe,
1196 .remove = __devexit_p(max8997_pmic_remove),
1197 .id_table = max8997_pmic_id,
1200 static int __init max8997_pmic_init(void)
1202 return platform_driver_register(&max8997_pmic_driver);
1204 subsys_initcall(max8997_pmic_init);
1206 static void __exit max8997_pmic_cleanup(void)
1208 platform_driver_unregister(&max8997_pmic_driver);
1210 module_exit(max8997_pmic_cleanup);
1212 MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver");
1213 MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
1214 MODULE_LICENSE("GPL");