blob: c8f95c07adb63aea4d174c9eab659ba11bcb5dea [file] [log] [blame]
Mark Brown1910efa2012-06-23 13:07:57 +01001/*
2 * arizona-ldo1.c -- LDO1 supply for Arizona devices
3 *
4 * Copyright 2012 Wolfson Microelectronics PLC.
5 *
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 */
13
14#include <linux/module.h>
15#include <linux/moduleparam.h>
16#include <linux/init.h>
17#include <linux/bitops.h>
18#include <linux/err.h>
19#include <linux/platform_device.h>
20#include <linux/regulator/driver.h>
21#include <linux/regulator/machine.h>
22#include <linux/gpio.h>
23#include <linux/slab.h>
24
25#include <linux/mfd/arizona/core.h>
26#include <linux/mfd/arizona/pdata.h>
27#include <linux/mfd/arizona/registers.h>
28
29struct arizona_ldo1 {
30 struct regulator_dev *regulator;
31 struct arizona *arizona;
32
33 struct regulator_consumer_supply supply;
34 struct regulator_init_data init_data;
35};
36
37static struct regulator_ops arizona_ldo1_ops = {
38 .list_voltage = regulator_list_voltage_linear,
39 .map_voltage = regulator_map_voltage_linear,
40 .get_voltage_sel = regulator_get_voltage_sel_regmap,
41 .set_voltage_sel = regulator_set_voltage_sel_regmap,
42};
43
44static const struct regulator_desc arizona_ldo1 = {
45 .name = "LDO1",
46 .supply_name = "LDOVDD",
47 .type = REGULATOR_VOLTAGE,
48 .ops = &arizona_ldo1_ops,
49
50 .vsel_reg = ARIZONA_LDO1_CONTROL_1,
51 .vsel_mask = ARIZONA_LDO1_VSEL_MASK,
52 .min_uV = 900000,
53 .uV_step = 50000,
54 .n_voltages = 7,
55
56 .owner = THIS_MODULE,
57};
58
59static const struct regulator_init_data arizona_ldo1_default = {
Mark Browna9905b12012-06-27 14:32:06 +010060 .constraints = {
61 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
62 },
Mark Brown1910efa2012-06-23 13:07:57 +010063 .num_consumer_supplies = 1,
64};
65
66static __devinit int arizona_ldo1_probe(struct platform_device *pdev)
67{
68 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
69 struct regulator_config config = { };
70 struct arizona_ldo1 *ldo1;
71 int ret;
72
73 ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
74 if (ldo1 == NULL) {
75 dev_err(&pdev->dev, "Unable to allocate private data\n");
76 return -ENOMEM;
77 }
78
79 ldo1->arizona = arizona;
80
81 /*
82 * Since the chip usually supplies itself we provide some
83 * default init_data for it. This will be overridden with
84 * platform data if provided.
85 */
86 ldo1->init_data = arizona_ldo1_default;
87 ldo1->init_data.consumer_supplies = &ldo1->supply;
88 ldo1->supply.supply = "DCVDD";
89 ldo1->supply.dev_name = dev_name(arizona->dev);
90
91 config.dev = arizona->dev;
92 config.driver_data = ldo1;
93 config.regmap = arizona->regmap;
Mark Browna9905b12012-06-27 14:32:06 +010094 config.ena_gpio = arizona->pdata.ldoena;
Mark Brown1910efa2012-06-23 13:07:57 +010095
96 if (arizona->pdata.ldo1)
97 config.init_data = arizona->pdata.ldo1;
98 else
99 config.init_data = &ldo1->init_data;
100
101 ldo1->regulator = regulator_register(&arizona_ldo1, &config);
102 if (IS_ERR(ldo1->regulator)) {
103 ret = PTR_ERR(ldo1->regulator);
104 dev_err(arizona->dev, "Failed to register LDO1 supply: %d\n",
105 ret);
106 return ret;
107 }
108
109 platform_set_drvdata(pdev, ldo1);
110
111 return 0;
112}
113
114static __devexit int arizona_ldo1_remove(struct platform_device *pdev)
115{
116 struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev);
117
118 regulator_unregister(ldo1->regulator);
119
120 return 0;
121}
122
123static struct platform_driver arizona_ldo1_driver = {
124 .probe = arizona_ldo1_probe,
125 .remove = __devexit_p(arizona_ldo1_remove),
126 .driver = {
127 .name = "arizona-ldo1",
128 .owner = THIS_MODULE,
129 },
130};
131
132module_platform_driver(arizona_ldo1_driver);
133
134/* Module information */
135MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
136MODULE_DESCRIPTION("Arizona LDO1 driver");
137MODULE_LICENSE("GPL");
138MODULE_ALIAS("platform:arizona-ldo1");