2 * max77843.c - Regulator driver for the Maxim MAX77843
4 * Copyright (C) 2015 Samsung Electronics
5 * Author: Jaewon Kim <jaewon02.kim@samsung.com>
6 * Author: Beomho Seo <beomho.seo@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.
14 #include <linux/module.h>
15 #include <linux/platform_device.h>
16 #include <linux/regulator/driver.h>
17 #include <linux/regulator/machine.h>
18 #include <linux/mfd/max77843-private.h>
19 #include <linux/regulator/of_regulator.h>
21 enum max77843_regulator_type
{
22 MAX77843_SAFEOUT1
= 0,
29 static const unsigned int max77843_safeout_voltage_table
[] = {
36 static int max77843_reg_get_current_limit(struct regulator_dev
*rdev
)
38 struct regmap
*regmap
= rdev
->regmap
;
39 unsigned int chg_min_uA
= rdev
->constraints
->min_uA
;
40 unsigned int chg_max_uA
= rdev
->constraints
->max_uA
;
43 unsigned int reg
, sel
;
45 ret
= regmap_read(regmap
, MAX77843_CHG_REG_CHG_CNFG_02
, ®
);
47 dev_err(&rdev
->dev
, "Failed to read charger register\n");
51 sel
= reg
& MAX77843_CHG_FAST_CHG_CURRENT_MASK
;
58 val
= chg_min_uA
+ MAX77843_CHG_FAST_CHG_CURRENT_STEP
* sel
;
65 static int max77843_reg_set_current_limit(struct regulator_dev
*rdev
,
66 int min_uA
, int max_uA
)
68 struct regmap
*regmap
= rdev
->regmap
;
69 unsigned int chg_min_uA
= rdev
->constraints
->min_uA
;
72 while (chg_min_uA
+ MAX77843_CHG_FAST_CHG_CURRENT_STEP
* sel
< min_uA
)
75 if (chg_min_uA
+ MAX77843_CHG_FAST_CHG_CURRENT_STEP
* sel
> max_uA
)
80 return regmap_write(regmap
, MAX77843_CHG_REG_CHG_CNFG_02
, sel
);
83 static struct regulator_ops max77843_charger_ops
= {
84 .is_enabled
= regulator_is_enabled_regmap
,
85 .enable
= regulator_enable_regmap
,
86 .disable
= regulator_disable_regmap
,
87 .get_current_limit
= max77843_reg_get_current_limit
,
88 .set_current_limit
= max77843_reg_set_current_limit
,
91 static struct regulator_ops max77843_regulator_ops
= {
92 .is_enabled
= regulator_is_enabled_regmap
,
93 .enable
= regulator_enable_regmap
,
94 .disable
= regulator_disable_regmap
,
95 .list_voltage
= regulator_list_voltage_table
,
96 .get_voltage_sel
= regulator_get_voltage_sel_regmap
,
97 .set_voltage_sel
= regulator_set_voltage_sel_regmap
,
100 #define MAX77843_SAFEOUT(num) { \
101 .name = "SAFEOUT" # num, \
102 .id = MAX77843_SAFEOUT ## num, \
103 .ops = &max77843_regulator_ops, \
104 .of_match = of_match_ptr("SAFEOUT" # num), \
105 .regulators_node = of_match_ptr("regulators"), \
106 .type = REGULATOR_VOLTAGE, \
107 .owner = THIS_MODULE, \
108 .n_voltages = ARRAY_SIZE(max77843_safeout_voltage_table), \
109 .volt_table = max77843_safeout_voltage_table, \
110 .enable_reg = MAX77843_SYS_REG_SAFEOUTCTRL, \
111 .enable_mask = MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT ## num, \
112 .vsel_reg = MAX77843_SYS_REG_SAFEOUTCTRL, \
113 .vsel_mask = MAX77843_REG_SAFEOUTCTRL_SAFEOUT ## num ## _MASK, \
116 static const struct regulator_desc max77843_supported_regulators
[] = {
117 [MAX77843_SAFEOUT1
] = MAX77843_SAFEOUT(1),
118 [MAX77843_SAFEOUT2
] = MAX77843_SAFEOUT(2),
119 [MAX77843_CHARGER
] = {
121 .id
= MAX77843_CHARGER
,
122 .ops
= &max77843_charger_ops
,
123 .of_match
= of_match_ptr("CHARGER"),
124 .regulators_node
= of_match_ptr("regulators"),
125 .type
= REGULATOR_CURRENT
,
126 .owner
= THIS_MODULE
,
127 .enable_reg
= MAX77843_CHG_REG_CHG_CNFG_00
,
128 .enable_mask
= MAX77843_CHG_MASK
| MAX77843_CHG_BUCK_MASK
,
129 .enable_val
= MAX77843_CHG_MASK
| MAX77843_CHG_BUCK_MASK
,
133 static struct regmap
*max77843_get_regmap(struct max77843
*max77843
, int reg_id
)
136 case MAX77843_SAFEOUT1
:
137 case MAX77843_SAFEOUT2
:
138 return max77843
->regmap
;
139 case MAX77843_CHARGER
:
140 return max77843
->regmap_chg
;
142 return max77843
->regmap
;
146 static int max77843_regulator_probe(struct platform_device
*pdev
)
148 struct max77843
*max77843
= dev_get_drvdata(pdev
->dev
.parent
);
149 struct regulator_config config
= {};
152 config
.dev
= max77843
->dev
;
153 config
.driver_data
= max77843
;
155 for (i
= 0; i
< ARRAY_SIZE(max77843_supported_regulators
); i
++) {
156 struct regulator_dev
*regulator
;
158 config
.regmap
= max77843_get_regmap(max77843
,
159 max77843_supported_regulators
[i
].id
);
161 regulator
= devm_regulator_register(&pdev
->dev
,
162 &max77843_supported_regulators
[i
], &config
);
163 if (IS_ERR(regulator
)) {
165 "Failed to regiser regulator-%d\n", i
);
166 return PTR_ERR(regulator
);
173 static const struct platform_device_id max77843_regulator_id
[] = {
174 { "max77843-regulator", },
178 static struct platform_driver max77843_regulator_driver
= {
180 .name
= "max77843-regulator",
182 .probe
= max77843_regulator_probe
,
183 .id_table
= max77843_regulator_id
,
186 static int __init
max77843_regulator_init(void)
188 return platform_driver_register(&max77843_regulator_driver
);
190 subsys_initcall(max77843_regulator_init
);
192 static void __exit
max77843_regulator_exit(void)
194 platform_driver_unregister(&max77843_regulator_driver
);
196 module_exit(max77843_regulator_exit
);
198 MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>");
199 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
200 MODULE_DESCRIPTION("Maxim MAX77843 regulator driver");
201 MODULE_LICENSE("GPL");