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_is_enabled(struct regulator_dev
*rdev
)
38 struct regmap
*regmap
= rdev
->regmap
;
42 ret
= regmap_read(regmap
, rdev
->desc
->enable_reg
, ®
);
44 dev_err(&rdev
->dev
, "Fialed to read charger register\n");
48 return (reg
& rdev
->desc
->enable_mask
) == rdev
->desc
->enable_mask
;
51 static int max77843_reg_get_current_limit(struct regulator_dev
*rdev
)
53 struct regmap
*regmap
= rdev
->regmap
;
54 unsigned int chg_min_uA
= rdev
->constraints
->min_uA
;
55 unsigned int chg_max_uA
= rdev
->constraints
->max_uA
;
58 unsigned int reg
, sel
;
60 ret
= regmap_read(regmap
, MAX77843_CHG_REG_CHG_CNFG_02
, ®
);
62 dev_err(&rdev
->dev
, "Failed to read charger register\n");
66 sel
= reg
& MAX77843_CHG_FAST_CHG_CURRENT_MASK
;
73 val
= chg_min_uA
+ MAX77843_CHG_FAST_CHG_CURRENT_STEP
* sel
;
80 static int max77843_reg_set_current_limit(struct regulator_dev
*rdev
,
81 int min_uA
, int max_uA
)
83 struct regmap
*regmap
= rdev
->regmap
;
84 unsigned int chg_min_uA
= rdev
->constraints
->min_uA
;
87 while (chg_min_uA
+ MAX77843_CHG_FAST_CHG_CURRENT_STEP
* sel
< min_uA
)
90 if (chg_min_uA
+ MAX77843_CHG_FAST_CHG_CURRENT_STEP
* sel
> max_uA
)
95 return regmap_write(regmap
, MAX77843_CHG_REG_CHG_CNFG_02
, sel
);
98 static struct regulator_ops max77843_charger_ops
= {
99 .is_enabled
= max77843_reg_is_enabled
,
100 .enable
= regulator_enable_regmap
,
101 .disable
= regulator_disable_regmap
,
102 .get_current_limit
= max77843_reg_get_current_limit
,
103 .set_current_limit
= max77843_reg_set_current_limit
,
106 static struct regulator_ops max77843_regulator_ops
= {
107 .is_enabled
= regulator_is_enabled_regmap
,
108 .enable
= regulator_enable_regmap
,
109 .disable
= regulator_disable_regmap
,
110 .list_voltage
= regulator_list_voltage_table
,
111 .get_voltage_sel
= regulator_get_voltage_sel_regmap
,
112 .set_voltage_sel
= regulator_set_voltage_sel_regmap
,
115 static const struct regulator_desc max77843_supported_regulators
[] = {
116 [MAX77843_SAFEOUT1
] = {
118 .id
= MAX77843_SAFEOUT1
,
119 .ops
= &max77843_regulator_ops
,
120 .of_match
= of_match_ptr("SAFEOUT1"),
121 .regulators_node
= of_match_ptr("regulators"),
122 .type
= REGULATOR_VOLTAGE
,
123 .owner
= THIS_MODULE
,
124 .n_voltages
= ARRAY_SIZE(max77843_safeout_voltage_table
),
125 .volt_table
= max77843_safeout_voltage_table
,
126 .enable_reg
= MAX77843_SYS_REG_SAFEOUTCTRL
,
127 .enable_mask
= MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT1
,
128 .vsel_reg
= MAX77843_SYS_REG_SAFEOUTCTRL
,
129 .vsel_mask
= MAX77843_REG_SAFEOUTCTRL_SAFEOUT1_MASK
,
131 [MAX77843_SAFEOUT2
] = {
133 .id
= MAX77843_SAFEOUT2
,
134 .ops
= &max77843_regulator_ops
,
135 .of_match
= of_match_ptr("SAFEOUT2"),
136 .regulators_node
= of_match_ptr("regulators"),
137 .type
= REGULATOR_VOLTAGE
,
138 .owner
= THIS_MODULE
,
139 .n_voltages
= ARRAY_SIZE(max77843_safeout_voltage_table
),
140 .volt_table
= max77843_safeout_voltage_table
,
141 .enable_reg
= MAX77843_SYS_REG_SAFEOUTCTRL
,
142 .enable_mask
= MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT2
,
143 .vsel_reg
= MAX77843_SYS_REG_SAFEOUTCTRL
,
144 .vsel_mask
= MAX77843_REG_SAFEOUTCTRL_SAFEOUT2_MASK
,
146 [MAX77843_CHARGER
] = {
148 .id
= MAX77843_CHARGER
,
149 .ops
= &max77843_charger_ops
,
150 .of_match
= of_match_ptr("CHARGER"),
151 .regulators_node
= of_match_ptr("regulators"),
152 .type
= REGULATOR_CURRENT
,
153 .owner
= THIS_MODULE
,
154 .enable_reg
= MAX77843_CHG_REG_CHG_CNFG_00
,
155 .enable_mask
= MAX77843_CHG_MASK
,
159 static struct regmap
*max77843_get_regmap(struct max77843
*max77843
, int reg_id
)
162 case MAX77843_SAFEOUT1
:
163 case MAX77843_SAFEOUT2
:
164 return max77843
->regmap
;
165 case MAX77843_CHARGER
:
166 return max77843
->regmap_chg
;
168 return max77843
->regmap
;
172 static int max77843_regulator_probe(struct platform_device
*pdev
)
174 struct max77843
*max77843
= dev_get_drvdata(pdev
->dev
.parent
);
175 struct regulator_config config
= {};
178 config
.dev
= max77843
->dev
;
179 config
.driver_data
= max77843
;
181 for (i
= 0; i
< ARRAY_SIZE(max77843_supported_regulators
); i
++) {
182 struct regulator_dev
*regulator
;
184 config
.regmap
= max77843_get_regmap(max77843
,
185 max77843_supported_regulators
[i
].id
);
187 regulator
= devm_regulator_register(&pdev
->dev
,
188 &max77843_supported_regulators
[i
], &config
);
189 if (IS_ERR(regulator
)) {
191 "Failed to regiser regulator-%d\n", i
);
192 return PTR_ERR(regulator
);
199 static const struct platform_device_id max77843_regulator_id
[] = {
200 { "max77843-regulator", },
204 static struct platform_driver max77843_regulator_driver
= {
206 .name
= "max77843-regulator",
208 .probe
= max77843_regulator_probe
,
209 .id_table
= max77843_regulator_id
,
212 static int __init
max77843_regulator_init(void)
214 return platform_driver_register(&max77843_regulator_driver
);
216 subsys_initcall(max77843_regulator_init
);
218 static void __exit
max77843_regulator_exit(void)
220 platform_driver_unregister(&max77843_regulator_driver
);
222 module_exit(max77843_regulator_exit
);
224 MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>");
225 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
226 MODULE_DESCRIPTION("Maxim MAX77843 regulator driver");
227 MODULE_LICENSE("GPL");