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/module.h>
30 #include <linux/platform_device.h>
31 #include <linux/regulator/driver.h>
32 #include <linux/regulator/machine.h>
33 #include <linux/mfd/max8997.h>
34 #include <linux/mfd/max8997-private.h>
38 struct max8997_dev *iodev;
40 struct regulator_dev **rdev;
41 int ramp_delay; /* in mV/us */
50 int buck125_gpioindex;
51 bool ignore_gpiodvs_side_effect;
53 u8 saved_states[MAX8997_REG_MAX];
56 static inline void max8997_set_gpio(struct max8997_data *max8997)
58 int set3 = (max8997->buck125_gpioindex) & 0x1;
59 int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1;
60 int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1;
62 gpio_set_value(max8997->buck125_gpios[0], set1);
63 gpio_set_value(max8997->buck125_gpios[1], set2);
64 gpio_set_value(max8997->buck125_gpios[2], set3);
67 struct voltage_map_desc {
74 /* Voltage maps in mV */
75 static const struct voltage_map_desc ldo_voltage_map_desc = {
76 .min = 800, .max = 3950, .step = 50, .n_bits = 6,
77 }; /* LDO1 ~ 18, 21 all */
79 static const struct voltage_map_desc buck1245_voltage_map_desc = {
80 .min = 650, .max = 2225, .step = 25, .n_bits = 6,
81 }; /* Buck1, 2, 4, 5 */
83 static const struct voltage_map_desc buck37_voltage_map_desc = {
84 .min = 750, .max = 3900, .step = 50, .n_bits = 6,
87 /* current map in mA */
88 static const struct voltage_map_desc charger_current_map_desc = {
89 .min = 200, .max = 950, .step = 50, .n_bits = 4,
92 static const struct voltage_map_desc topoff_current_map_desc = {
93 .min = 50, .max = 200, .step = 10, .n_bits = 4,
96 static const struct voltage_map_desc *reg_voltage_map[] = {
97 [MAX8997_LDO1] = &ldo_voltage_map_desc,
98 [MAX8997_LDO2] = &ldo_voltage_map_desc,
99 [MAX8997_LDO3] = &ldo_voltage_map_desc,
100 [MAX8997_LDO4] = &ldo_voltage_map_desc,
101 [MAX8997_LDO5] = &ldo_voltage_map_desc,
102 [MAX8997_LDO6] = &ldo_voltage_map_desc,
103 [MAX8997_LDO7] = &ldo_voltage_map_desc,
104 [MAX8997_LDO8] = &ldo_voltage_map_desc,
105 [MAX8997_LDO9] = &ldo_voltage_map_desc,
106 [MAX8997_LDO10] = &ldo_voltage_map_desc,
107 [MAX8997_LDO11] = &ldo_voltage_map_desc,
108 [MAX8997_LDO12] = &ldo_voltage_map_desc,
109 [MAX8997_LDO13] = &ldo_voltage_map_desc,
110 [MAX8997_LDO14] = &ldo_voltage_map_desc,
111 [MAX8997_LDO15] = &ldo_voltage_map_desc,
112 [MAX8997_LDO16] = &ldo_voltage_map_desc,
113 [MAX8997_LDO17] = &ldo_voltage_map_desc,
114 [MAX8997_LDO18] = &ldo_voltage_map_desc,
115 [MAX8997_LDO21] = &ldo_voltage_map_desc,
116 [MAX8997_BUCK1] = &buck1245_voltage_map_desc,
117 [MAX8997_BUCK2] = &buck1245_voltage_map_desc,
118 [MAX8997_BUCK3] = &buck37_voltage_map_desc,
119 [MAX8997_BUCK4] = &buck1245_voltage_map_desc,
120 [MAX8997_BUCK5] = &buck1245_voltage_map_desc,
121 [MAX8997_BUCK6] = NULL,
122 [MAX8997_BUCK7] = &buck37_voltage_map_desc,
123 [MAX8997_EN32KHZ_AP] = NULL,
124 [MAX8997_EN32KHZ_CP] = NULL,
125 [MAX8997_ENVICHG] = NULL,
126 [MAX8997_ESAFEOUT1] = NULL,
127 [MAX8997_ESAFEOUT2] = NULL,
128 [MAX8997_CHARGER_CV] = NULL,
129 [MAX8997_CHARGER] = &charger_current_map_desc,
130 [MAX8997_CHARGER_TOPOFF] = &topoff_current_map_desc,
133 static int max8997_list_voltage_safeout(struct regulator_dev *rdev,
134 unsigned int selector)
136 int rid = rdev_get_id(rdev);
138 if (rid == MAX8997_ESAFEOUT1 || rid == MAX8997_ESAFEOUT2) {
156 static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev,
157 unsigned int selector)
159 int rid = rdev_get_id(rdev);
161 if (rid != MAX8997_CHARGER_CV)
168 return 4000000 + 20000 * (selector - 0x01);
178 static int max8997_list_voltage(struct regulator_dev *rdev,
179 unsigned int selector)
181 const struct voltage_map_desc *desc;
182 int rid = rdev_get_id(rdev);
185 if (rid >= ARRAY_SIZE(reg_voltage_map) ||
189 desc = reg_voltage_map[rid];
193 val = desc->min + desc->step * selector;
200 static int max8997_get_enable_register(struct regulator_dev *rdev,
201 int *reg, int *mask, int *pattern)
203 int rid = rdev_get_id(rdev);
206 case MAX8997_LDO1 ... MAX8997_LDO21:
207 *reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1);
212 *reg = MAX8997_REG_BUCK1CTRL;
217 *reg = MAX8997_REG_BUCK2CTRL;
222 *reg = MAX8997_REG_BUCK3CTRL;
227 *reg = MAX8997_REG_BUCK4CTRL;
232 *reg = MAX8997_REG_BUCK5CTRL;
237 *reg = MAX8997_REG_BUCK6CTRL;
242 *reg = MAX8997_REG_BUCK7CTRL;
246 case MAX8997_EN32KHZ_AP ... MAX8997_EN32KHZ_CP:
247 *reg = MAX8997_REG_MAINCON1;
248 *mask = 0x01 << (rid - MAX8997_EN32KHZ_AP);
249 *pattern = 0x01 << (rid - MAX8997_EN32KHZ_AP);
251 case MAX8997_ENVICHG:
252 *reg = MAX8997_REG_MBCCTRL1;
256 case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2:
257 *reg = MAX8997_REG_SAFEOUTCTRL;
258 *mask = 0x40 << (rid - MAX8997_ESAFEOUT1);
259 *pattern = 0x40 << (rid - MAX8997_ESAFEOUT1);
261 case MAX8997_CHARGER:
262 *reg = MAX8997_REG_MBCCTRL2;
267 /* Not controllable or not exists */
274 static int max8997_reg_is_enabled(struct regulator_dev *rdev)
276 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
277 struct i2c_client *i2c = max8997->iodev->i2c;
278 int ret, reg, mask, pattern;
281 ret = max8997_get_enable_register(rdev, ®, &mask, &pattern);
283 return 1; /* "not controllable" */
287 ret = max8997_read_reg(i2c, reg, &val);
291 return (val & mask) == pattern;
294 static int max8997_reg_enable(struct regulator_dev *rdev)
296 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
297 struct i2c_client *i2c = max8997->iodev->i2c;
298 int ret, reg, mask, pattern;
300 ret = max8997_get_enable_register(rdev, ®, &mask, &pattern);
304 return max8997_update_reg(i2c, reg, pattern, mask);
307 static int max8997_reg_disable(struct regulator_dev *rdev)
309 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
310 struct i2c_client *i2c = max8997->iodev->i2c;
311 int ret, reg, mask, pattern;
313 ret = max8997_get_enable_register(rdev, ®, &mask, &pattern);
317 return max8997_update_reg(i2c, reg, ~pattern, mask);
320 static int max8997_get_voltage_register(struct regulator_dev *rdev,
321 int *_reg, int *_shift, int *_mask)
323 int rid = rdev_get_id(rdev);
324 int reg, shift = 0, mask = 0x3f;
327 case MAX8997_LDO1 ... MAX8997_LDO21:
328 reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1);
331 reg = MAX8997_REG_BUCK1DVS1;
334 reg = MAX8997_REG_BUCK2DVS1;
337 reg = MAX8997_REG_BUCK3DVS;
340 reg = MAX8997_REG_BUCK4DVS;
343 reg = MAX8997_REG_BUCK5DVS1;
346 reg = MAX8997_REG_BUCK7DVS;
348 case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2:
349 reg = MAX8997_REG_SAFEOUTCTRL;
350 shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0;
353 case MAX8997_CHARGER_CV:
354 reg = MAX8997_REG_MBCCTRL3;
358 case MAX8997_CHARGER:
359 reg = MAX8997_REG_MBCCTRL4;
363 case MAX8997_CHARGER_TOPOFF:
364 reg = MAX8997_REG_MBCCTRL5;
379 static int max8997_get_voltage(struct regulator_dev *rdev)
381 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
382 struct i2c_client *i2c = max8997->iodev->i2c;
383 int reg, shift, mask, ret;
384 int rid = rdev_get_id(rdev);
387 ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
391 if ((rid == MAX8997_BUCK1 && max8997->buck1_gpiodvs) ||
392 (rid == MAX8997_BUCK2 && max8997->buck2_gpiodvs) ||
393 (rid == MAX8997_BUCK5 && max8997->buck5_gpiodvs))
394 reg += max8997->buck125_gpioindex;
396 ret = max8997_read_reg(i2c, reg, &val);
403 if (rdev->desc && rdev->desc->ops && rdev->desc->ops->list_voltage)
404 return rdev->desc->ops->list_voltage(rdev, val);
407 * max8997_list_voltage returns value for any rdev with voltage_map,
408 * which works for "CHARGER" and "CHARGER TOPOFF" that do not have
409 * list_voltage ops (they are current regulators).
411 return max8997_list_voltage(rdev, val);
414 static inline int max8997_get_voltage_proper_val(
415 const struct voltage_map_desc *desc,
416 int min_vol, int max_vol)
423 if (max_vol < desc->min || min_vol > desc->max)
426 while (desc->min + desc->step * i < min_vol &&
427 desc->min + desc->step * i < desc->max)
430 if (desc->min + desc->step * i > max_vol)
433 if (i >= (1 << desc->n_bits))
439 static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev,
440 int min_uV, int max_uV, unsigned *selector)
442 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
443 struct i2c_client *i2c = max8997->iodev->i2c;
444 int rid = rdev_get_id(rdev);
446 int reg, shift = 0, mask, ret = 0;
449 if (rid != MAX8997_CHARGER_CV)
452 ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
456 if (max_uV < 4000000 || min_uV > 4350000)
459 if (min_uV <= 4000000) {
460 if (max_uV >= 4000000)
464 } else if (min_uV <= 4200000 && max_uV >= 4200000)
467 lb = (min_uV - 4000001) / 20000 + 2;
468 ub = (max_uV - 4000000) / 20000 + 1;
485 ret = max8997_update_reg(i2c, reg, val << shift, mask);
491 * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF
492 * BUCK1, 2, and 5 are available if they are not controlled by gpio
494 static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev,
495 int min_uV, int max_uV, unsigned *selector)
497 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
498 struct i2c_client *i2c = max8997->iodev->i2c;
499 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
500 const struct voltage_map_desc *desc;
501 int rid = rdev_get_id(rdev);
502 int reg, shift = 0, mask, ret;
507 case MAX8997_LDO1 ... MAX8997_LDO21:
509 case MAX8997_BUCK1 ... MAX8997_BUCK5:
515 case MAX8997_CHARGER:
517 case MAX8997_CHARGER_TOPOFF:
523 desc = reg_voltage_map[rid];
525 i = max8997_get_voltage_proper_val(desc, min_vol, max_vol);
529 ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
533 max8997_read_reg(i2c, reg, &org);
534 org = (org & mask) >> shift;
536 ret = max8997_update_reg(i2c, reg, i << shift, mask << shift);
539 if (rid == MAX8997_BUCK1 || rid == MAX8997_BUCK2 ||
540 rid == MAX8997_BUCK4 || rid == MAX8997_BUCK5) {
541 /* If the voltage is increasing */
543 udelay(DIV_ROUND_UP(desc->step * (i - org),
544 max8997->ramp_delay));
551 * Assess the damage on the voltage setting of BUCK1,2,5 by the change.
553 * When GPIO-DVS mode is used for multiple bucks, changing the voltage value
554 * of one of the bucks may affect that of another buck, which is the side
555 * effect of the change (set_voltage). This function examines the GPIO-DVS
556 * configurations and checks whether such side-effect exists.
558 static int max8997_assess_side_effect(struct regulator_dev *rdev,
559 u8 new_val, int *best)
561 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
562 int rid = rdev_get_id(rdev);
564 bool buckx_gpiodvs[3];
566 int min_side_effect = INT_MAX;
585 buckx_val[0] = max8997->buck1_vol;
586 buckx_val[1] = max8997->buck2_vol;
587 buckx_val[2] = max8997->buck5_vol;
588 buckx_gpiodvs[0] = max8997->buck1_gpiodvs;
589 buckx_gpiodvs[1] = max8997->buck2_gpiodvs;
590 buckx_gpiodvs[2] = max8997->buck5_gpiodvs;
592 for (i = 0; i < 8; i++) {
595 if (new_val != (buckx_val[rid])[i]) {
601 for (others = 0; others < 3; others++) {
606 if (buckx_gpiodvs[others] == false)
607 continue; /* Not affected */
608 diff = (buckx_val[others])[i] -
609 (buckx_val[others])[max8997->buck125_gpioindex];
611 side_effect[i] += diff;
613 side_effect[i] -= diff;
615 if (side_effect[i] == 0) {
617 return 0; /* NO SIDE EFFECT! Use This! */
619 if (side_effect[i] < min_side_effect) {
620 min_side_effect = side_effect[i];
628 return side_effect[*best];
632 * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls
633 * max8997_set_voltage_ldobuck to do the job.
635 static int max8997_set_voltage_buck(struct regulator_dev *rdev,
636 int min_uV, int max_uV, unsigned *selector)
638 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
639 int rid = rdev_get_id(rdev);
640 const struct voltage_map_desc *desc;
641 int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg;
642 bool gpio_dvs_mode = false;
643 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
645 if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7)
650 if (max8997->buck1_gpiodvs)
651 gpio_dvs_mode = true;
654 if (max8997->buck2_gpiodvs)
655 gpio_dvs_mode = true;
658 if (max8997->buck5_gpiodvs)
659 gpio_dvs_mode = true;
664 return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV,
667 desc = reg_voltage_map[rid];
668 new_val = max8997_get_voltage_proper_val(desc, min_vol, max_vol);
676 damage = max8997_assess_side_effect(rdev, new_val, &new_idx);
680 if (tmp_dmg > damage) {
687 } while (desc->min + desc->step + new_val <= desc->max);
692 if (max8997->ignore_gpiodvs_side_effect == false)
695 dev_warn(&rdev->dev, "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET:"
696 " %d -> %d\n", max8997->buck125_gpioindex, tmp_idx);
699 if (new_idx < 0 || new_val < 0)
702 max8997->buck125_gpioindex = new_idx;
703 max8997_set_gpio(max8997);
709 static const int safeoutvolt[] = {
716 /* For SAFEOUT1 and SAFEOUT2 */
717 static int max8997_set_voltage_safeout(struct regulator_dev *rdev,
718 int min_uV, int max_uV, unsigned *selector)
720 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
721 struct i2c_client *i2c = max8997->iodev->i2c;
722 int rid = rdev_get_id(rdev);
723 int reg, shift = 0, mask, ret;
727 if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2)
730 for (i = 0; i < ARRAY_SIZE(safeoutvolt); i++) {
731 if (min_uV <= safeoutvolt[i] &&
732 max_uV >= safeoutvolt[i])
736 if (i >= ARRAY_SIZE(safeoutvolt))
744 ret = max8997_get_voltage_register(rdev, ®, &shift, &mask);
748 ret = max8997_update_reg(i2c, reg, val << shift, mask << shift);
754 static int max8997_reg_enable_suspend(struct regulator_dev *rdev)
759 static int max8997_reg_disable_suspend(struct regulator_dev *rdev)
761 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
762 struct i2c_client *i2c = max8997->iodev->i2c;
763 int ret, reg, mask, pattern;
764 int rid = rdev_get_id(rdev);
766 ret = max8997_get_enable_register(rdev, ®, &mask, &pattern);
770 max8997_read_reg(i2c, reg, &max8997->saved_states[rid]);
772 if (rid == MAX8997_LDO1 ||
773 rid == MAX8997_LDO10 ||
774 rid == MAX8997_LDO21) {
775 dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n",
777 return max8997_update_reg(i2c, reg, 0x40, mask);
780 dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n",
781 rdev->desc->name, max8997->saved_states[rid] & mask,
783 return max8997_update_reg(i2c, reg, ~pattern, mask);
786 static struct regulator_ops max8997_ldo_ops = {
787 .list_voltage = max8997_list_voltage,
788 .is_enabled = max8997_reg_is_enabled,
789 .enable = max8997_reg_enable,
790 .disable = max8997_reg_disable,
791 .get_voltage = max8997_get_voltage,
792 .set_voltage = max8997_set_voltage_ldobuck,
793 .set_suspend_enable = max8997_reg_enable_suspend,
794 .set_suspend_disable = max8997_reg_disable_suspend,
797 static struct regulator_ops max8997_buck_ops = {
798 .list_voltage = max8997_list_voltage,
799 .is_enabled = max8997_reg_is_enabled,
800 .enable = max8997_reg_enable,
801 .disable = max8997_reg_disable,
802 .get_voltage = max8997_get_voltage,
803 .set_voltage = max8997_set_voltage_buck,
804 .set_suspend_enable = max8997_reg_enable_suspend,
805 .set_suspend_disable = max8997_reg_disable_suspend,
808 static struct regulator_ops max8997_fixedvolt_ops = {
809 .list_voltage = max8997_list_voltage,
810 .is_enabled = max8997_reg_is_enabled,
811 .enable = max8997_reg_enable,
812 .disable = max8997_reg_disable,
813 .set_suspend_enable = max8997_reg_enable_suspend,
814 .set_suspend_disable = max8997_reg_disable_suspend,
817 static struct regulator_ops max8997_safeout_ops = {
818 .list_voltage = max8997_list_voltage_safeout,
819 .is_enabled = max8997_reg_is_enabled,
820 .enable = max8997_reg_enable,
821 .disable = max8997_reg_disable,
822 .get_voltage = max8997_get_voltage,
823 .set_voltage = max8997_set_voltage_safeout,
824 .set_suspend_enable = max8997_reg_enable_suspend,
825 .set_suspend_disable = max8997_reg_disable_suspend,
828 static struct regulator_ops max8997_fixedstate_ops = {
829 .list_voltage = max8997_list_voltage_charger_cv,
830 .get_voltage = max8997_get_voltage,
831 .set_voltage = max8997_set_voltage_charger_cv,
834 static int max8997_set_voltage_ldobuck_wrap(struct regulator_dev *rdev,
835 int min_uV, int max_uV)
839 return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, &dummy);
843 static struct regulator_ops max8997_charger_ops = {
844 .is_enabled = max8997_reg_is_enabled,
845 .enable = max8997_reg_enable,
846 .disable = max8997_reg_disable,
847 .get_current_limit = max8997_get_voltage,
848 .set_current_limit = max8997_set_voltage_ldobuck_wrap,
851 static struct regulator_ops max8997_charger_fixedstate_ops = {
852 .is_enabled = max8997_reg_is_enabled,
853 .get_current_limit = max8997_get_voltage,
854 .set_current_limit = max8997_set_voltage_ldobuck_wrap,
857 #define regulator_desc_ldo(num) { \
859 .id = MAX8997_LDO##num, \
860 .ops = &max8997_ldo_ops, \
861 .type = REGULATOR_VOLTAGE, \
862 .owner = THIS_MODULE, \
864 #define regulator_desc_buck(num) { \
865 .name = "BUCK"#num, \
866 .id = MAX8997_BUCK##num, \
867 .ops = &max8997_buck_ops, \
868 .type = REGULATOR_VOLTAGE, \
869 .owner = THIS_MODULE, \
872 static struct regulator_desc regulators[] = {
873 regulator_desc_ldo(1),
874 regulator_desc_ldo(2),
875 regulator_desc_ldo(3),
876 regulator_desc_ldo(4),
877 regulator_desc_ldo(5),
878 regulator_desc_ldo(6),
879 regulator_desc_ldo(7),
880 regulator_desc_ldo(8),
881 regulator_desc_ldo(9),
882 regulator_desc_ldo(10),
883 regulator_desc_ldo(11),
884 regulator_desc_ldo(12),
885 regulator_desc_ldo(13),
886 regulator_desc_ldo(14),
887 regulator_desc_ldo(15),
888 regulator_desc_ldo(16),
889 regulator_desc_ldo(17),
890 regulator_desc_ldo(18),
891 regulator_desc_ldo(21),
892 regulator_desc_buck(1),
893 regulator_desc_buck(2),
894 regulator_desc_buck(3),
895 regulator_desc_buck(4),
896 regulator_desc_buck(5),
900 .ops = &max8997_fixedvolt_ops,
901 .type = REGULATOR_VOLTAGE,
902 .owner = THIS_MODULE,
904 regulator_desc_buck(7),
906 .name = "EN32KHz_AP",
907 .id = MAX8997_EN32KHZ_AP,
908 .ops = &max8997_fixedvolt_ops,
909 .type = REGULATOR_VOLTAGE,
910 .owner = THIS_MODULE,
912 .name = "EN32KHz_CP",
913 .id = MAX8997_EN32KHZ_CP,
914 .ops = &max8997_fixedvolt_ops,
915 .type = REGULATOR_VOLTAGE,
916 .owner = THIS_MODULE,
919 .id = MAX8997_ENVICHG,
920 .ops = &max8997_fixedvolt_ops,
921 .type = REGULATOR_VOLTAGE,
922 .owner = THIS_MODULE,
925 .id = MAX8997_ESAFEOUT1,
926 .ops = &max8997_safeout_ops,
927 .type = REGULATOR_VOLTAGE,
928 .owner = THIS_MODULE,
931 .id = MAX8997_ESAFEOUT2,
932 .ops = &max8997_safeout_ops,
933 .type = REGULATOR_VOLTAGE,
934 .owner = THIS_MODULE,
936 .name = "CHARGER_CV",
937 .id = MAX8997_CHARGER_CV,
938 .ops = &max8997_fixedstate_ops,
939 .type = REGULATOR_VOLTAGE,
940 .owner = THIS_MODULE,
943 .id = MAX8997_CHARGER,
944 .ops = &max8997_charger_ops,
945 .type = REGULATOR_CURRENT,
946 .owner = THIS_MODULE,
948 .name = "CHARGER_TOPOFF",
949 .id = MAX8997_CHARGER_TOPOFF,
950 .ops = &max8997_charger_fixedstate_ops,
951 .type = REGULATOR_CURRENT,
952 .owner = THIS_MODULE,
956 static __devinit int max8997_pmic_probe(struct platform_device *pdev)
958 struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
959 struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev);
960 struct regulator_dev **rdev;
961 struct max8997_data *max8997;
962 struct i2c_client *i2c;
964 u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0;
967 dev_err(pdev->dev.parent, "No platform init data supplied.\n");
971 max8997 = kzalloc(sizeof(struct max8997_data), GFP_KERNEL);
975 size = sizeof(struct regulator_dev *) * pdata->num_regulators;
976 max8997->rdev = kzalloc(size, GFP_KERNEL);
977 if (!max8997->rdev) {
982 rdev = max8997->rdev;
983 max8997->dev = &pdev->dev;
984 max8997->iodev = iodev;
985 max8997->num_regulators = pdata->num_regulators;
986 platform_set_drvdata(pdev, max8997);
987 i2c = max8997->iodev->i2c;
989 max8997->buck125_gpioindex = pdata->buck125_default_idx;
990 max8997->buck1_gpiodvs = pdata->buck1_gpiodvs;
991 max8997->buck2_gpiodvs = pdata->buck2_gpiodvs;
992 max8997->buck5_gpiodvs = pdata->buck5_gpiodvs;
993 memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3);
994 max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect;
996 for (i = 0; i < 8; i++) {
997 max8997->buck1_vol[i] = ret =
998 max8997_get_voltage_proper_val(
999 &buck1245_voltage_map_desc,
1000 pdata->buck1_voltage[i] / 1000,
1001 pdata->buck1_voltage[i] / 1000 +
1002 buck1245_voltage_map_desc.step);
1006 max8997->buck2_vol[i] = ret =
1007 max8997_get_voltage_proper_val(
1008 &buck1245_voltage_map_desc,
1009 pdata->buck2_voltage[i] / 1000,
1010 pdata->buck2_voltage[i] / 1000 +
1011 buck1245_voltage_map_desc.step);
1015 max8997->buck5_vol[i] = ret =
1016 max8997_get_voltage_proper_val(
1017 &buck1245_voltage_map_desc,
1018 pdata->buck5_voltage[i] / 1000,
1019 pdata->buck5_voltage[i] / 1000 +
1020 buck1245_voltage_map_desc.step);
1024 if (max_buck1 < max8997->buck1_vol[i])
1025 max_buck1 = max8997->buck1_vol[i];
1026 if (max_buck2 < max8997->buck2_vol[i])
1027 max_buck2 = max8997->buck2_vol[i];
1028 if (max_buck5 < max8997->buck5_vol[i])
1029 max_buck5 = max8997->buck5_vol[i];
1032 /* For the safety, set max voltage before setting up */
1033 for (i = 0; i < 8; i++) {
1034 max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
1036 max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
1038 max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
1043 * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them.
1044 * If at least one of them cares, set gpios.
1046 if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
1047 pdata->buck5_gpiodvs) {
1048 bool gpio1set = false, gpio2set = false;
1050 if (!gpio_is_valid(pdata->buck125_gpios[0]) ||
1051 !gpio_is_valid(pdata->buck125_gpios[1]) ||
1052 !gpio_is_valid(pdata->buck125_gpios[2])) {
1053 dev_err(&pdev->dev, "GPIO NOT VALID\n");
1058 ret = gpio_request(pdata->buck125_gpios[0],
1061 dev_warn(&pdev->dev, "Duplicated gpio request"
1068 ret = gpio_request(pdata->buck125_gpios[1],
1071 dev_warn(&pdev->dev, "Duplicated gpio request"
1075 gpio_free(pdata->buck125_gpios[0]);
1080 ret = gpio_request(pdata->buck125_gpios[2],
1083 dev_warn(&pdev->dev, "Duplicated gpio request"
1087 gpio_free(pdata->buck125_gpios[0]);
1089 gpio_free(pdata->buck125_gpios[1]);
1093 gpio_direction_output(pdata->buck125_gpios[0],
1094 (max8997->buck125_gpioindex >> 2)
1096 gpio_direction_output(pdata->buck125_gpios[1],
1097 (max8997->buck125_gpioindex >> 1)
1099 gpio_direction_output(pdata->buck125_gpios[2],
1100 (max8997->buck125_gpioindex >> 0)
1105 /* DVS-GPIO disabled */
1106 max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ?
1107 (1 << 1) : (0 << 1), 1 << 1);
1108 max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ?
1109 (1 << 1) : (0 << 1), 1 << 1);
1110 max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ?
1111 (1 << 1) : (0 << 1), 1 << 1);
1113 /* Initialize all the DVS related BUCK registers */
1114 for (i = 0; i < 8; i++) {
1115 max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
1116 max8997->buck1_vol[i],
1118 max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
1119 max8997->buck2_vol[i],
1121 max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
1122 max8997->buck5_vol[i],
1127 max8997->ramp_delay = 10; /* set 10mV/us, which is the default */
1128 max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9);
1130 for (i = 0; i < pdata->num_regulators; i++) {
1131 const struct voltage_map_desc *desc;
1132 int id = pdata->regulators[i].id;
1134 desc = reg_voltage_map[id];
1136 regulators[id].n_voltages =
1137 (desc->max - desc->min) / desc->step + 1;
1138 else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2)
1139 regulators[id].n_voltages = 4;
1140 else if (id == MAX8997_CHARGER_CV)
1141 regulators[id].n_voltages = 16;
1143 rdev[i] = regulator_register(®ulators[id], max8997->dev,
1144 pdata->regulators[i].initdata, max8997, NULL);
1145 if (IS_ERR(rdev[i])) {
1146 ret = PTR_ERR(rdev[i]);
1147 dev_err(max8997->dev, "regulator init failed for %d\n",
1156 for (i = 0; i < max8997->num_regulators; i++)
1158 regulator_unregister(rdev[i]);
1160 kfree(max8997->rdev);
1166 static int __devexit max8997_pmic_remove(struct platform_device *pdev)
1168 struct max8997_data *max8997 = platform_get_drvdata(pdev);
1169 struct regulator_dev **rdev = max8997->rdev;
1172 for (i = 0; i < max8997->num_regulators; i++)
1174 regulator_unregister(rdev[i]);
1176 kfree(max8997->rdev);
1182 static const struct platform_device_id max8997_pmic_id[] = {
1183 { "max8997-pmic", 0},
1186 MODULE_DEVICE_TABLE(platform, max8997_pmic_id);
1188 static struct platform_driver max8997_pmic_driver = {
1190 .name = "max8997-pmic",
1191 .owner = THIS_MODULE,
1193 .probe = max8997_pmic_probe,
1194 .remove = __devexit_p(max8997_pmic_remove),
1195 .id_table = max8997_pmic_id,
1198 static int __init max8997_pmic_init(void)
1200 return platform_driver_register(&max8997_pmic_driver);
1202 subsys_initcall(max8997_pmic_init);
1204 static void __exit max8997_pmic_cleanup(void)
1206 platform_driver_unregister(&max8997_pmic_driver);
1208 module_exit(max8997_pmic_cleanup);
1210 MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver");
1211 MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
1212 MODULE_LICENSE("GPL");