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4fd41151 CYT |
1 | /* |
2 | * I2C driver for the X-Powers' Power Management ICs | |
3 | * | |
4 | * AXP20x typically comprises an adaptive USB-Compatible PWM charger, BUCK DC-DC | |
5 | * converters, LDOs, multiple 12-bit ADCs of voltage, current and temperature | |
6 | * as well as configurable GPIOs. | |
7 | * | |
8 | * This driver supports the I2C variants. | |
9 | * | |
10 | * Copyright (C) 2014 Carlo Caione | |
11 | * | |
12 | * Author: Carlo Caione <carlo@caione.org> | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License version 2 as | |
16 | * published by the Free Software Foundation. | |
17 | */ | |
18 | ||
19 | #include <linux/acpi.h> | |
20 | #include <linux/err.h> | |
21 | #include <linux/i2c.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/mfd/axp20x.h> | |
24 | #include <linux/of.h> | |
25 | #include <linux/regmap.h> | |
26 | #include <linux/slab.h> | |
27 | ||
28 | static int axp20x_i2c_probe(struct i2c_client *i2c, | |
29 | const struct i2c_device_id *id) | |
30 | { | |
31 | struct axp20x_dev *axp20x; | |
32 | int ret; | |
33 | ||
34 | axp20x = devm_kzalloc(&i2c->dev, sizeof(*axp20x), GFP_KERNEL); | |
35 | if (!axp20x) | |
36 | return -ENOMEM; | |
37 | ||
38 | axp20x->dev = &i2c->dev; | |
39 | axp20x->irq = i2c->irq; | |
40 | dev_set_drvdata(axp20x->dev, axp20x); | |
41 | ||
42 | ret = axp20x_match_device(axp20x); | |
43 | if (ret) | |
44 | return ret; | |
45 | ||
46 | axp20x->regmap = devm_regmap_init_i2c(i2c, axp20x->regmap_cfg); | |
47 | if (IS_ERR(axp20x->regmap)) { | |
48 | ret = PTR_ERR(axp20x->regmap); | |
49 | dev_err(&i2c->dev, "regmap init failed: %d\n", ret); | |
50 | return ret; | |
51 | } | |
52 | ||
53 | return axp20x_device_probe(axp20x); | |
54 | } | |
55 | ||
56 | static int axp20x_i2c_remove(struct i2c_client *i2c) | |
57 | { | |
58 | struct axp20x_dev *axp20x = i2c_get_clientdata(i2c); | |
59 | ||
60 | return axp20x_device_remove(axp20x); | |
61 | } | |
62 | ||
63 | static const struct of_device_id axp20x_i2c_of_match[] = { | |
64 | { .compatible = "x-powers,axp152", .data = (void *)AXP152_ID }, | |
65 | { .compatible = "x-powers,axp202", .data = (void *)AXP202_ID }, | |
66 | { .compatible = "x-powers,axp209", .data = (void *)AXP209_ID }, | |
67 | { .compatible = "x-powers,axp221", .data = (void *)AXP221_ID }, | |
68 | { }, | |
69 | }; | |
70 | MODULE_DEVICE_TABLE(of, axp20x_i2c_of_match); | |
71 | ||
72 | /* | |
73 | * This is useless for OF-enabled devices, but it is needed by I2C subsystem | |
74 | */ | |
75 | static const struct i2c_device_id axp20x_i2c_id[] = { | |
76 | { }, | |
77 | }; | |
78 | MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id); | |
79 | ||
80 | static const struct acpi_device_id axp20x_i2c_acpi_match[] = { | |
81 | { | |
82 | .id = "INT33F4", | |
83 | .driver_data = AXP288_ID, | |
84 | }, | |
85 | { }, | |
86 | }; | |
87 | MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match); | |
88 | ||
89 | static struct i2c_driver axp20x_i2c_driver = { | |
90 | .driver = { | |
91 | .name = "axp20x-i2c", | |
92 | .of_match_table = of_match_ptr(axp20x_i2c_of_match), | |
93 | .acpi_match_table = ACPI_PTR(axp20x_i2c_acpi_match), | |
94 | }, | |
95 | .probe = axp20x_i2c_probe, | |
96 | .remove = axp20x_i2c_remove, | |
97 | .id_table = axp20x_i2c_id, | |
98 | }; | |
99 | ||
100 | module_i2c_driver(axp20x_i2c_driver); | |
101 | ||
102 | MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X"); | |
103 | MODULE_AUTHOR("Carlo Caione <carlo@caione.org>"); | |
104 | MODULE_LICENSE("GPL"); |