xref: /linux/drivers/mfd/axp20x-i2c.c (revision 80739fd00c7ea1315d362ce889bef499452913ef)
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,axp323", .data = (void *)AXP323_ID },
69 	{ .compatible = "x-powers,axp717", .data = (void *)AXP717_ID },
70 	{ .compatible = "x-powers,axp803", .data = (void *)AXP803_ID },
71 	{ .compatible = "x-powers,axp806", .data = (void *)AXP806_ID },
72 	{ .compatible = "x-powers,axp15060", .data = (void *)AXP15060_ID },
73 	{ },
74 };
75 MODULE_DEVICE_TABLE(of, axp20x_i2c_of_match);
76 #endif
77 
78 static const struct i2c_device_id axp20x_i2c_id[] = {
79 	{ "axp152" },
80 	{ "axp192" },
81 	{ "axp202" },
82 	{ "axp209" },
83 	{ "axp221" },
84 	{ "axp223" },
85 	{ "axp313a" },
86 	{ "axp717" },
87 	{ "axp803" },
88 	{ "axp806" },
89 	{ "axp15060" },
90 	{ }
91 };
92 MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
93 
94 #ifdef CONFIG_ACPI
95 static const struct acpi_device_id axp20x_i2c_acpi_match[] = {
96 	{
97 		.id = "INT33F4",
98 		.driver_data = AXP288_ID,
99 	},
100 	{ },
101 };
102 MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match);
103 #endif
104 
105 static struct i2c_driver axp20x_i2c_driver = {
106 	.driver = {
107 		.name	= "axp20x-i2c",
108 		.of_match_table	= of_match_ptr(axp20x_i2c_of_match),
109 		.acpi_match_table = ACPI_PTR(axp20x_i2c_acpi_match),
110 	},
111 	.probe		= axp20x_i2c_probe,
112 	.remove		= axp20x_i2c_remove,
113 	.id_table	= axp20x_i2c_id,
114 };
115 
116 module_i2c_driver(axp20x_i2c_driver);
117 
118 MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X");
119 MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
120 MODULE_LICENSE("GPL");
121