1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2022 Richtek Technology Corp.
4 * Author: ChiYuan Huang <cy_huang@richtek.com>
5 */
6
7#include <linux/i2c.h>
8#include <linux/kernel.h>
9#include <linux/mfd/core.h>
10#include <linux/module.h>
11#include <linux/mod_devicetable.h>
12#include <linux/regmap.h>
13
14#define RT5120_REG_INTENABLE	0x1D
15#define RT5120_REG_INTSTAT	0x1E
16#define RT5120_REG_FZCMODE	0x44
17
18#define RT5120_INT_HOTDIE	0
19#define RT5120_INT_PWRKEY_REL	5
20#define RT5120_INT_PWRKEY_PRESS	6
21
22static const struct regmap_range rt5120_rd_yes_ranges[] = {
23	regmap_reg_range(0x03, 0x13),
24	regmap_reg_range(0x1c, 0x20),
25	regmap_reg_range(0x44, 0x44),
26};
27
28static const struct regmap_range rt5120_wr_yes_ranges[] = {
29	regmap_reg_range(0x06, 0x13),
30	regmap_reg_range(0x1c, 0x20),
31	regmap_reg_range(0x44, 0x44),
32};
33
34static const struct regmap_access_table rt5120_rd_table = {
35	.yes_ranges = rt5120_rd_yes_ranges,
36	.n_yes_ranges = ARRAY_SIZE(rt5120_rd_yes_ranges),
37};
38
39static const struct regmap_access_table rt5120_wr_table = {
40	.yes_ranges = rt5120_wr_yes_ranges,
41	.n_yes_ranges = ARRAY_SIZE(rt5120_wr_yes_ranges),
42};
43
44static const struct regmap_config rt5120_regmap_config = {
45	.reg_bits = 8,
46	.val_bits = 8,
47	.max_register = RT5120_REG_FZCMODE,
48
49	.wr_table = &rt5120_wr_table,
50	.rd_table = &rt5120_rd_table,
51};
52
53static const struct regmap_irq rt5120_irqs[] = {
54	REGMAP_IRQ_REG_LINE(RT5120_INT_HOTDIE, 8),
55	REGMAP_IRQ_REG_LINE(RT5120_INT_PWRKEY_REL, 8),
56	REGMAP_IRQ_REG_LINE(RT5120_INT_PWRKEY_PRESS, 8),
57};
58
59static const struct regmap_irq_chip rt5120_irq_chip = {
60	.name = "rt5120-pmic",
61	.status_base = RT5120_REG_INTSTAT,
62	.unmask_base = RT5120_REG_INTENABLE,
63	.ack_base = RT5120_REG_INTSTAT,
64	.use_ack = true,
65	.num_regs = 1,
66	.irqs = rt5120_irqs,
67	.num_irqs = ARRAY_SIZE(rt5120_irqs),
68};
69
70static const struct resource rt5120_regulator_resources[] = {
71	DEFINE_RES_IRQ(RT5120_INT_HOTDIE),
72};
73
74static const struct resource rt5120_pwrkey_resources[] = {
75	DEFINE_RES_IRQ_NAMED(RT5120_INT_PWRKEY_PRESS, "pwrkey-press"),
76	DEFINE_RES_IRQ_NAMED(RT5120_INT_PWRKEY_REL, "pwrkey-release"),
77};
78
79static const struct mfd_cell rt5120_devs[] = {
80	MFD_CELL_RES("rt5120-regulator", rt5120_regulator_resources),
81	MFD_CELL_OF("rt5120-pwrkey", rt5120_pwrkey_resources, NULL, 0, 0, "richtek,rt5120-pwrkey"),
82};
83
84static int rt5120_probe(struct i2c_client *i2c)
85{
86	struct device *dev = &i2c->dev;
87	struct regmap *regmap;
88	struct regmap_irq_chip_data *irq_data;
89	int ret;
90
91	regmap = devm_regmap_init_i2c(i2c, &rt5120_regmap_config);
92	if (IS_ERR(regmap))
93		return dev_err_probe(dev, PTR_ERR(regmap),
94				     "Failed to init regmap\n");
95
96	ret = devm_regmap_add_irq_chip(dev, regmap, i2c->irq, IRQF_ONESHOT, 0,
97				       &rt5120_irq_chip, &irq_data);
98	if (ret)
99		return dev_err_probe(dev, ret, "Failed to add IRQ chip\n");
100
101	return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, rt5120_devs,
102				    ARRAY_SIZE(rt5120_devs), NULL, 0,
103				    regmap_irq_get_domain(irq_data));
104}
105
106static const struct of_device_id rt5120_device_match_table[] = {
107	{ .compatible = "richtek,rt5120" },
108	{}
109};
110MODULE_DEVICE_TABLE(of, rt5120_device_match_table);
111
112static struct i2c_driver rt5120_driver = {
113	.driver = {
114		.name = "rt5120",
115		.of_match_table = rt5120_device_match_table,
116	},
117	.probe = rt5120_probe,
118};
119module_i2c_driver(rt5120_driver);
120
121MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
122MODULE_DESCRIPTION("Richtek RT5120 I2C driver");
123MODULE_LICENSE("GPL v2");
124