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