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{
27 struct axp20x_dev *axp20x;
28 int ret;
29
30 axp20x = devm_kzalloc(dev: &i2c->dev, size: sizeof(*axp20x), GFP_KERNEL);
31 if (!axp20x)
32 return -ENOMEM;
33
34 axp20x->dev = &i2c->dev;
35 axp20x->irq = i2c->irq;
36 dev_set_drvdata(dev: axp20x->dev, data: axp20x);
37
38 ret = axp20x_match_device(axp20x);
39 if (ret)
40 return ret;
41
42 axp20x->regmap = devm_regmap_init_i2c(i2c, axp20x->regmap_cfg);
43 if (IS_ERR(ptr: axp20x->regmap)) {
44 ret = PTR_ERR(ptr: axp20x->regmap);
45 dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
46 return ret;
47 }
48
49 return axp20x_device_probe(axp20x);
50}
51
52static void axp20x_i2c_remove(struct i2c_client *i2c)
53{
54 struct axp20x_dev *axp20x = i2c_get_clientdata(client: i2c);
55
56 axp20x_device_remove(axp20x);
57}
58
59#ifdef CONFIG_OF
60static const struct of_device_id axp20x_i2c_of_match[] = {
61 { .compatible = "x-powers,axp152", .data = (void *)AXP152_ID },
62 { .compatible = "x-powers,axp192", .data = (void *)AXP192_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,axp313a", .data = (void *)AXP313A_ID },
68 { .compatible = "x-powers,axp803", .data = (void *)AXP803_ID },
69 { .compatible = "x-powers,axp806", .data = (void *)AXP806_ID },
70 { .compatible = "x-powers,axp15060", .data = (void *)AXP15060_ID },
71 { },
72};
73MODULE_DEVICE_TABLE(of, axp20x_i2c_of_match);
74#endif
75
76static const struct i2c_device_id axp20x_i2c_id[] = {
77 { "axp152", 0 },
78 { "axp192", 0 },
79 { "axp202", 0 },
80 { "axp209", 0 },
81 { "axp221", 0 },
82 { "axp223", 0 },
83 { "axp313a", 0 },
84 { "axp803", 0 },
85 { "axp806", 0 },
86 { "axp15060", 0 },
87 { },
88};
89MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
90
91#ifdef CONFIG_ACPI
92static const struct acpi_device_id axp20x_i2c_acpi_match[] = {
93 {
94 .id = "INT33F4",
95 .driver_data = AXP288_ID,
96 },
97 { },
98};
99MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match);
100#endif
101
102static struct i2c_driver axp20x_i2c_driver = {
103 .driver = {
104 .name = "axp20x-i2c",
105 .of_match_table = of_match_ptr(axp20x_i2c_of_match),
106 .acpi_match_table = ACPI_PTR(axp20x_i2c_acpi_match),
107 },
108 .probe = axp20x_i2c_probe,
109 .remove = axp20x_i2c_remove,
110 .id_table = axp20x_i2c_id,
111};
112
113module_i2c_driver(axp20x_i2c_driver);
114
115MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X");
116MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
117MODULE_LICENSE("GPL");
118

source code of linux/drivers/mfd/axp20x-i2c.c