xref: /openbmc/linux/drivers/mfd/axp20x-i2c.c (revision 63eeabbc)
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 
axp20x_i2c_probe(struct i2c_client * i2c)25 static int axp20x_i2c_probe(struct i2c_client *i2c)
26 {
27 	struct axp20x_dev *axp20x;
28 	int ret;
29 
30 	axp20x = devm_kzalloc(&i2c->dev, 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(axp20x->dev, 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(axp20x->regmap)) {
44 		ret = PTR_ERR(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 
axp20x_i2c_remove(struct i2c_client * i2c)52 static void axp20x_i2c_remove(struct i2c_client *i2c)
53 {
54 	struct axp20x_dev *axp20x = i2c_get_clientdata(i2c);
55 
56 	axp20x_device_remove(axp20x);
57 }
58 
59 #ifdef CONFIG_OF
60 static 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 };
73 MODULE_DEVICE_TABLE(of, axp20x_i2c_of_match);
74 #endif
75 
76 static 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 };
89 MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
90 
91 #ifdef CONFIG_ACPI
92 static const struct acpi_device_id axp20x_i2c_acpi_match[] = {
93 	{
94 		.id = "INT33F4",
95 		.driver_data = AXP288_ID,
96 	},
97 	{ },
98 };
99 MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match);
100 #endif
101 
102 static 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 
113 module_i2c_driver(axp20x_i2c_driver);
114 
115 MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X");
116 MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
117 MODULE_LICENSE("GPL");
118