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 int axp20x_i2c_remove(struct i2c_client *i2c)
54{
55	struct axp20x_dev *axp20x = i2c_get_clientdata(i2c);
56
57	return axp20x_device_remove(axp20x);
58}
59
60static const struct of_device_id axp20x_i2c_of_match[] = {
61	{ .compatible = "x-powers,axp152", .data = (void *)AXP152_ID },
62	{ .compatible = "x-powers,axp202", .data = (void *)AXP202_ID },
63	{ .compatible = "x-powers,axp209", .data = (void *)AXP209_ID },
64	{ .compatible = "x-powers,axp221", .data = (void *)AXP221_ID },
65	{ .compatible = "x-powers,axp223", .data = (void *)AXP223_ID },
66	{ .compatible = "x-powers,axp803", .data = (void *)AXP803_ID },
67	{ .compatible = "x-powers,axp806", .data = (void *)AXP806_ID },
68	{ },
69};
70MODULE_DEVICE_TABLE(of, axp20x_i2c_of_match);
71
72static const struct i2c_device_id axp20x_i2c_id[] = {
73	{ "axp152", 0 },
74	{ "axp202", 0 },
75	{ "axp209", 0 },
76	{ "axp221", 0 },
77	{ "axp223", 0 },
78	{ "axp803", 0 },
79	{ "axp806", 0 },
80	{ },
81};
82MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
83
84#ifdef CONFIG_ACPI
85static const struct acpi_device_id axp20x_i2c_acpi_match[] = {
86	{
87		.id = "INT33F4",
88		.driver_data = AXP288_ID,
89	},
90	{ },
91};
92MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match);
93#endif
94
95static struct i2c_driver axp20x_i2c_driver = {
96	.driver = {
97		.name	= "axp20x-i2c",
98		.of_match_table	= of_match_ptr(axp20x_i2c_of_match),
99		.acpi_match_table = ACPI_PTR(axp20x_i2c_acpi_match),
100	},
101	.probe		= axp20x_i2c_probe,
102	.remove		= axp20x_i2c_remove,
103	.id_table	= axp20x_i2c_id,
104};
105
106module_i2c_driver(axp20x_i2c_driver);
107
108MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X");
109MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
110MODULE_LICENSE("GPL");
111