projects/linux·blob master · refs

122 lines · 3.3 KiB

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