tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
28static 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
56static 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
63static 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};
70MODULE_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 */
75static const struct i2c_device_id axp20x_i2c_id[] = {
76 { },
77};
78MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
79
80static const struct acpi_device_id axp20x_i2c_acpi_match[] = {
81 {
82 .id = "INT33F4",
83 .driver_data = AXP288_ID,
84 },
85 { },
86};
87MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match);
88
89static 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
100module_i2c_driver(axp20x_i2c_driver);
101
102MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X");
103MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
104MODULE_LICENSE("GPL");