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Linux kernel mirror (for testing)
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linux
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * I2C driver for the X-Powers' Power Management ICs
4 *
5 * AXP20x typically comprises an adaptive USB-Compatible PWM charger, BUCK DC-DC
6 * converters, LDOs, multiple 12-bit ADCs of voltage, current and temperature
7 * as well as configurable GPIOs.
8 *
9 * This driver supports the I2C variants.
10 *
11 * Copyright (C) 2014 Carlo Caione
12 *
13 * Author: Carlo Caione <carlo@caione.org>
14 */
15
16#include <linux/acpi.h>
17#include <linux/err.h>
18#include <linux/i2c.h>
19#include <linux/module.h>
20#include <linux/mfd/axp20x.h>
21#include <linux/of.h>
22#include <linux/regmap.h>
23#include <linux/slab.h>
24
25static int axp20x_i2c_probe(struct i2c_client *i2c,
26 const struct i2c_device_id *id)
27{
28 struct axp20x_dev *axp20x;
29 int ret;
30
31 axp20x = devm_kzalloc(&i2c->dev, sizeof(*axp20x), GFP_KERNEL);
32 if (!axp20x)
33 return -ENOMEM;
34
35 axp20x->dev = &i2c->dev;
36 axp20x->irq = i2c->irq;
37 dev_set_drvdata(axp20x->dev, axp20x);
38
39 ret = axp20x_match_device(axp20x);
40 if (ret)
41 return ret;
42
43 axp20x->regmap = devm_regmap_init_i2c(i2c, axp20x->regmap_cfg);
44 if (IS_ERR(axp20x->regmap)) {
45 ret = PTR_ERR(axp20x->regmap);
46 dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
47 return ret;
48 }
49
50 return axp20x_device_probe(axp20x);
51}
52
53static void axp20x_i2c_remove(struct i2c_client *i2c)
54{
55 struct axp20x_dev *axp20x = i2c_get_clientdata(i2c);
56
57 axp20x_device_remove(axp20x);
58}
59
60#ifdef CONFIG_OF
61static const struct of_device_id axp20x_i2c_of_match[] = {
62 { .compatible = "x-powers,axp152", .data = (void *)AXP152_ID },
63 { .compatible = "x-powers,axp202", .data = (void *)AXP202_ID },
64 { .compatible = "x-powers,axp209", .data = (void *)AXP209_ID },
65 { .compatible = "x-powers,axp221", .data = (void *)AXP221_ID },
66 { .compatible = "x-powers,axp223", .data = (void *)AXP223_ID },
67 { .compatible = "x-powers,axp803", .data = (void *)AXP803_ID },
68 { .compatible = "x-powers,axp806", .data = (void *)AXP806_ID },
69 { },
70};
71MODULE_DEVICE_TABLE(of, axp20x_i2c_of_match);
72#endif
73
74static const struct i2c_device_id axp20x_i2c_id[] = {
75 { "axp152", 0 },
76 { "axp202", 0 },
77 { "axp209", 0 },
78 { "axp221", 0 },
79 { "axp223", 0 },
80 { "axp803", 0 },
81 { "axp806", 0 },
82 { },
83};
84MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
85
86#ifdef CONFIG_ACPI
87static const struct acpi_device_id axp20x_i2c_acpi_match[] = {
88 {
89 .id = "INT33F4",
90 .driver_data = AXP288_ID,
91 },
92 { },
93};
94MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match);
95#endif
96
97static struct i2c_driver axp20x_i2c_driver = {
98 .driver = {
99 .name = "axp20x-i2c",
100 .of_match_table = of_match_ptr(axp20x_i2c_of_match),
101 .acpi_match_table = ACPI_PTR(axp20x_i2c_acpi_match),
102 },
103 .probe = axp20x_i2c_probe,
104 .remove = axp20x_i2c_remove,
105 .id_table = axp20x_i2c_id,
106};
107
108module_i2c_driver(axp20x_i2c_driver);
109
110MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X");
111MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
112MODULE_LICENSE("GPL");