xref: /kernel/linux/linux-5.10/drivers/mfd/rt5033.c (revision 8c2ecf20) 
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/module.h>
14#include <linux/interrupt.h>
15#include <linux/of_device.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	.mask_base	= RT5033_REG_PMIC_IRQ_CTRL,
33	.mask_invert	= true,
34	.num_regs	= 1,
35	.irqs		= rt5033_irqs,
36	.num_irqs	= ARRAY_SIZE(rt5033_irqs),
37};
38
39static const struct mfd_cell rt5033_devs[] = {
40	{ .name = "rt5033-regulator", },
41	{
42		.name = "rt5033-charger",
43		.of_compatible = "richtek,rt5033-charger",
44	}, {
45		.name = "rt5033-led",
46		.of_compatible = "richtek,rt5033-led",
47	},
48};
49
50static const struct regmap_config rt5033_regmap_config = {
51	.reg_bits	= 8,
52	.val_bits	= 8,
53	.max_register	= RT5033_REG_END,
54};
55
56static int rt5033_i2c_probe(struct i2c_client *i2c,
57				const struct i2c_device_id *id)
58{
59	struct rt5033_dev *rt5033;
60	unsigned int dev_id;
61	int ret;
62
63	rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL);
64	if (!rt5033)
65		return -ENOMEM;
66
67	i2c_set_clientdata(i2c, rt5033);
68	rt5033->dev = &i2c->dev;
69	rt5033->irq = i2c->irq;
70	rt5033->wakeup = true;
71
72	rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config);
73	if (IS_ERR(rt5033->regmap)) {
74		dev_err(&i2c->dev, "Failed to allocate register map.\n");
75		return PTR_ERR(rt5033->regmap);
76	}
77
78	ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id);
79	if (ret) {
80		dev_err(&i2c->dev, "Device not found\n");
81		return -ENODEV;
82	}
83	dev_info(&i2c->dev, "Device found Device ID: %04x\n", dev_id);
84
85	ret = regmap_add_irq_chip(rt5033->regmap, rt5033->irq,
86			IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
87			0, &rt5033_irq_chip, &rt5033->irq_data);
88	if (ret) {
89		dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",
90							rt5033->irq, ret);
91		return ret;
92	}
93
94	ret = devm_mfd_add_devices(rt5033->dev, -1, rt5033_devs,
95				   ARRAY_SIZE(rt5033_devs), NULL, 0,
96				   regmap_irq_get_domain(rt5033->irq_data));
97	if (ret < 0) {
98		dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n");
99		return ret;
100	}
101
102	device_init_wakeup(rt5033->dev, rt5033->wakeup);
103
104	return 0;
105}
106
107static const struct i2c_device_id rt5033_i2c_id[] = {
108	{ "rt5033", },
109	{ }
110};
111MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id);
112
113static const struct of_device_id rt5033_dt_match[] = {
114	{ .compatible = "richtek,rt5033", },
115	{ }
116};
117MODULE_DEVICE_TABLE(of, rt5033_dt_match);
118
119static struct i2c_driver rt5033_driver = {
120	.driver = {
121		.name = "rt5033",
122		.of_match_table = of_match_ptr(rt5033_dt_match),
123	},
124	.probe = rt5033_i2c_probe,
125	.id_table = rt5033_i2c_id,
126};
127module_i2c_driver(rt5033_driver);
128
129MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver");
130MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
131MODULE_LICENSE("GPL");
132