xref: /openbmc/linux/drivers/mfd/axp20x-i2c.c (revision 27ab1c1c)
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 
25 static 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 
53 static 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 
60 #ifdef CONFIG_OF
61 static 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 };
71 MODULE_DEVICE_TABLE(of, axp20x_i2c_of_match);
72 #endif
73 
74 static 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 };
84 MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
85 
86 #ifdef CONFIG_ACPI
87 static const struct acpi_device_id axp20x_i2c_acpi_match[] = {
88 	{
89 		.id = "INT33F4",
90 		.driver_data = AXP288_ID,
91 	},
92 	{ },
93 };
94 MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match);
95 #endif
96 
97 static 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 
108 module_i2c_driver(axp20x_i2c_driver);
109 
110 MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X");
111 MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
112 MODULE_LICENSE("GPL");
113