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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * MFD core driver for the Richtek RT5033.
4 *
5 * RT5033 comprises multiple sub-devices switcing charger, fuel gauge,
6 * flash LED, current source, LDO and BUCK regulators.
7 *
8 * Copyright (C) 2014 Samsung Electronics, Co., Ltd.
9 * Author: Beomho Seo <[email protected]>
10 */
11
12#include <linux/err.h>
13#include <linux/module.h>
14#include <linux/interrupt.h>
15#include <linux/mfd/core.h>
16#include <linux/mfd/rt5033.h>
17#include <linux/mfd/rt5033-private.h>
18
19static const struct regmap_irq rt5033_irqs[] = {
20 { .mask = RT5033_PMIC_IRQ_BUCKOCP, },
21 { .mask = RT5033_PMIC_IRQ_BUCKLV, },
22 { .mask = RT5033_PMIC_IRQ_SAFELDOLV, },
23 { .mask = RT5033_PMIC_IRQ_LDOLV, },
24 { .mask = RT5033_PMIC_IRQ_OT, },
25 { .mask = RT5033_PMIC_IRQ_VDDA_UV, },
26};
27
28static const struct regmap_irq_chip rt5033_irq_chip = {
29 .name = "rt5033",
30 .status_base = RT5033_REG_PMIC_IRQ_STAT,
31 .unmask_base = RT5033_REG_PMIC_IRQ_CTRL,
32 .num_regs = 1,
33 .irqs = rt5033_irqs,
34 .num_irqs = ARRAY_SIZE(rt5033_irqs),
35};
36
37static const struct mfd_cell rt5033_devs[] = {
38 { .name = "rt5033-regulator", },
39 {
40 .name = "rt5033-charger",
41 .of_compatible = "richtek,rt5033-charger",
42 }, {
43 .name = "rt5033-led",
44 .of_compatible = "richtek,rt5033-led",
45 },
46};
47
48static const struct regmap_config rt5033_regmap_config = {
49 .reg_bits = 8,
50 .val_bits = 8,
51 .max_register = RT5033_REG_END,
52};
53
54static int rt5033_i2c_probe(struct i2c_client *i2c)
55{
56 struct rt5033_dev *rt5033;
57 unsigned int dev_id, chip_rev;
58 int ret;
59
60 rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL);
61 if (!rt5033)
62 return -ENOMEM;
63
64 i2c_set_clientdata(i2c, rt5033);
65 rt5033->dev = &i2c->dev;
66 rt5033->irq = i2c->irq;
67 rt5033->wakeup = true;
68
69 rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config);
70 if (IS_ERR(rt5033->regmap)) {
71 dev_err(&i2c->dev, "Failed to allocate register map.\n");
72 return PTR_ERR(rt5033->regmap);
73 }
74
75 ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id);
76 if (ret) {
77 dev_err(&i2c->dev, "Device not found\n");
78 return -ENODEV;
79 }
80 chip_rev = dev_id & RT5033_CHIP_REV_MASK;
81 dev_info(&i2c->dev, "Device found (rev. %d)\n", chip_rev);
82
83 ret = devm_regmap_add_irq_chip(rt5033->dev, rt5033->regmap,
84 rt5033->irq, IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
85 0, &rt5033_irq_chip, &rt5033->irq_data);
86 if (ret) {
87 dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",
88 rt5033->irq, ret);
89 return ret;
90 }
91
92 ret = devm_mfd_add_devices(rt5033->dev, -1, rt5033_devs,
93 ARRAY_SIZE(rt5033_devs), NULL, 0,
94 regmap_irq_get_domain(rt5033->irq_data));
95 if (ret < 0) {
96 dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n");
97 return ret;
98 }
99
100 if (rt5033->wakeup) {
101 ret = devm_device_init_wakeup(rt5033->dev);
102 if (ret)
103 return dev_err_probe(rt5033->dev, ret, "Failed to init wakeup\n");
104 }
105
106 return 0;
107}
108
109static const struct i2c_device_id rt5033_i2c_id[] = {
110 { "rt5033", },
111 { }
112};
113MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id);
114
115static const struct of_device_id rt5033_dt_match[] = {
116 { .compatible = "richtek,rt5033", },
117 { }
118};
119MODULE_DEVICE_TABLE(of, rt5033_dt_match);
120
121static struct i2c_driver rt5033_driver = {
122 .driver = {
123 .name = "rt5033",
124 .of_match_table = rt5033_dt_match,
125 },
126 .probe = rt5033_i2c_probe,
127 .id_table = rt5033_i2c_id,
128};
129module_i2c_driver(rt5033_driver);
130
131MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver");
132MODULE_AUTHOR("Beomho Seo <[email protected]>");
133MODULE_LICENSE("GPL");