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