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 | |
22 | static 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 | |
28 | static 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 | |
34 | static 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 | |
39 | static 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 | |
44 | static 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 | |
53 | static 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 | |
59 | static 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 | |
70 | static const struct resource rt5120_regulator_resources[] = { |
71 | DEFINE_RES_IRQ(RT5120_INT_HOTDIE), |
72 | }; |
73 | |
74 | static 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 | |
79 | static 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 | |
84 | static 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(ptr: regmap)) |
93 | return dev_err_probe(dev, err: PTR_ERR(ptr: regmap), |
94 | fmt: "Failed to init regmap\n" ); |
95 | |
96 | ret = devm_regmap_add_irq_chip(dev, map: regmap, irq: i2c->irq, IRQF_ONESHOT, irq_base: 0, |
97 | chip: &rt5120_irq_chip, data: &irq_data); |
98 | if (ret) |
99 | return dev_err_probe(dev, err: ret, fmt: "Failed to add IRQ chip\n" ); |
100 | |
101 | return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, cells: rt5120_devs, |
102 | ARRAY_SIZE(rt5120_devs), NULL, irq_base: 0, |
103 | irq_domain: regmap_irq_get_domain(data: irq_data)); |
104 | } |
105 | |
106 | static const struct of_device_id rt5120_device_match_table[] = { |
107 | { .compatible = "richtek,rt5120" }, |
108 | {} |
109 | }; |
110 | MODULE_DEVICE_TABLE(of, rt5120_device_match_table); |
111 | |
112 | static struct i2c_driver rt5120_driver = { |
113 | .driver = { |
114 | .name = "rt5120" , |
115 | .of_match_table = rt5120_device_match_table, |
116 | }, |
117 | .probe = rt5120_probe, |
118 | }; |
119 | module_i2c_driver(rt5120_driver); |
120 | |
121 | MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>" ); |
122 | MODULE_DESCRIPTION("Richtek RT5120 I2C driver" ); |
123 | MODULE_LICENSE("GPL v2" ); |
124 | |