1/*
2 * MFD core driver for the Richtek RT5033.
3 *
4 * RT5033 comprises multiple sub-devices switcing charger, fuel gauge,
5 * flash LED, current source, LDO and BUCK regulators.
6 *
7 * Copyright (C) 2014 Samsung Electronics, Co., Ltd.
8 * Author: Beomho Seo <beomho.seo@samsung.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published bythe Free Software Foundation.
13 */
14
15#include <linux/err.h>
16#include <linux/module.h>
17#include <linux/interrupt.h>
18#include <linux/of_device.h>
19#include <linux/mfd/core.h>
20#include <linux/mfd/rt5033.h>
21#include <linux/mfd/rt5033-private.h>
22
23static const struct regmap_irq rt5033_irqs[] = {
24 { .mask = RT5033_PMIC_IRQ_BUCKOCP, },
25 { .mask = RT5033_PMIC_IRQ_BUCKLV, },
26 { .mask = RT5033_PMIC_IRQ_SAFELDOLV, },
27 { .mask = RT5033_PMIC_IRQ_LDOLV, },
28 { .mask = RT5033_PMIC_IRQ_OT, },
29 { .mask = RT5033_PMIC_IRQ_VDDA_UV, },
30};
31
32static const struct regmap_irq_chip rt5033_irq_chip = {
33 .name = "rt5033",
34 .status_base = RT5033_REG_PMIC_IRQ_STAT,
35 .mask_base = RT5033_REG_PMIC_IRQ_CTRL,
36 .mask_invert = true,
37 .num_regs = 1,
38 .irqs = rt5033_irqs,
39 .num_irqs = ARRAY_SIZE(rt5033_irqs),
40};
41
42static const struct mfd_cell rt5033_devs[] = {
43 { .name = "rt5033-regulator", },
44 {
45 .name = "rt5033-charger",
46 .of_compatible = "richtek,rt5033-charger",
47 }, {
48 .name = "rt5033-battery",
49 .of_compatible = "richtek,rt5033-battery",
50 }, {
51 .name = "rt5033-led",
52 .of_compatible = "richtek,rt5033-led",
53 },
54};
55
56static const struct regmap_config rt5033_regmap_config = {
57 .reg_bits = 8,
58 .val_bits = 8,
59 .max_register = RT5033_REG_END,
60};
61
62static int rt5033_i2c_probe(struct i2c_client *i2c,
63 const struct i2c_device_id *id)
64{
65 struct rt5033_dev *rt5033;
66 unsigned int dev_id;
67 int ret;
68
69 rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL);
70 if (!rt5033)
71 return -ENOMEM;
72
73 i2c_set_clientdata(i2c, rt5033);
74 rt5033->dev = &i2c->dev;
75 rt5033->irq = i2c->irq;
76 rt5033->wakeup = true;
77
78 rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config);
79 if (IS_ERR(rt5033->regmap)) {
80 dev_err(&i2c->dev, "Failed to allocate register map.\n");
81 return PTR_ERR(rt5033->regmap);
82 }
83
84 ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id);
85 if (ret) {
86 dev_err(&i2c->dev, "Device not found\n");
87 return -ENODEV;
88 }
89 dev_info(&i2c->dev, "Device found Device ID: %04x\n", dev_id);
90
91 ret = regmap_add_irq_chip(rt5033->regmap, rt5033->irq,
92 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
93 0, &rt5033_irq_chip, &rt5033->irq_data);
94 if (ret) {
95 dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",
96 rt5033->irq, ret);
97 return ret;
98 }
99
100 ret = devm_mfd_add_devices(rt5033->dev, -1, rt5033_devs,
101 ARRAY_SIZE(rt5033_devs), NULL, 0,
102 regmap_irq_get_domain(rt5033->irq_data));
103 if (ret < 0) {
104 dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n");
105 return ret;
106 }
107
108 device_init_wakeup(rt5033->dev, rt5033->wakeup);
109
110 return 0;
111}
112
113static const struct i2c_device_id rt5033_i2c_id[] = {
114 { "rt5033", },
115 { }
116};
117MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id);
118
119static const struct of_device_id rt5033_dt_match[] = {
120 { .compatible = "richtek,rt5033", },
121 { }
122};
123MODULE_DEVICE_TABLE(of, rt5033_dt_match);
124
125static struct i2c_driver rt5033_driver = {
126 .driver = {
127 .name = "rt5033",
128 .of_match_table = of_match_ptr(rt5033_dt_match),
129 },
130 .probe = rt5033_i2c_probe,
131 .id_table = rt5033_i2c_id,
132};
133module_i2c_driver(rt5033_driver);
134
135MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver");
136MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
137MODULE_LICENSE("GPL");
138