1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * I2C driver for the X-Powers' Power Management ICs
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * AXP20x typically comprises an adaptive USB-Compatible PWM charger, BUCK DC-DC
6*4882a593Smuzhiyun * converters, LDOs, multiple 12-bit ADCs of voltage, current and temperature
7*4882a593Smuzhiyun * as well as configurable GPIOs.
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * This driver supports the I2C variants.
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun * Copyright (C) 2014 Carlo Caione
12*4882a593Smuzhiyun *
13*4882a593Smuzhiyun * Author: Carlo Caione <carlo@caione.org>
14*4882a593Smuzhiyun */
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include <linux/acpi.h>
17*4882a593Smuzhiyun #include <linux/err.h>
18*4882a593Smuzhiyun #include <linux/i2c.h>
19*4882a593Smuzhiyun #include <linux/module.h>
20*4882a593Smuzhiyun #include <linux/mfd/axp20x.h>
21*4882a593Smuzhiyun #include <linux/of.h>
22*4882a593Smuzhiyun #include <linux/regmap.h>
23*4882a593Smuzhiyun #include <linux/slab.h>
24*4882a593Smuzhiyun
axp20x_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)25*4882a593Smuzhiyun static int axp20x_i2c_probe(struct i2c_client *i2c,
26*4882a593Smuzhiyun const struct i2c_device_id *id)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun struct axp20x_dev *axp20x;
29*4882a593Smuzhiyun int ret;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun axp20x = devm_kzalloc(&i2c->dev, sizeof(*axp20x), GFP_KERNEL);
32*4882a593Smuzhiyun if (!axp20x)
33*4882a593Smuzhiyun return -ENOMEM;
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun axp20x->dev = &i2c->dev;
36*4882a593Smuzhiyun axp20x->irq = i2c->irq;
37*4882a593Smuzhiyun dev_set_drvdata(axp20x->dev, axp20x);
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun ret = axp20x_match_device(axp20x);
40*4882a593Smuzhiyun if (ret)
41*4882a593Smuzhiyun return ret;
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun axp20x->regmap = devm_regmap_init_i2c(i2c, axp20x->regmap_cfg);
44*4882a593Smuzhiyun if (IS_ERR(axp20x->regmap)) {
45*4882a593Smuzhiyun ret = PTR_ERR(axp20x->regmap);
46*4882a593Smuzhiyun dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
47*4882a593Smuzhiyun return ret;
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun return axp20x_device_probe(axp20x);
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
axp20x_i2c_remove(struct i2c_client * i2c)53*4882a593Smuzhiyun static int axp20x_i2c_remove(struct i2c_client *i2c)
54*4882a593Smuzhiyun {
55*4882a593Smuzhiyun struct axp20x_dev *axp20x = i2c_get_clientdata(i2c);
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun return axp20x_device_remove(axp20x);
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun static const struct of_device_id axp20x_i2c_of_match[] = {
61*4882a593Smuzhiyun { .compatible = "x-powers,axp152", .data = (void *)AXP152_ID },
62*4882a593Smuzhiyun { .compatible = "x-powers,axp202", .data = (void *)AXP202_ID },
63*4882a593Smuzhiyun { .compatible = "x-powers,axp209", .data = (void *)AXP209_ID },
64*4882a593Smuzhiyun { .compatible = "x-powers,axp221", .data = (void *)AXP221_ID },
65*4882a593Smuzhiyun { .compatible = "x-powers,axp223", .data = (void *)AXP223_ID },
66*4882a593Smuzhiyun { .compatible = "x-powers,axp803", .data = (void *)AXP803_ID },
67*4882a593Smuzhiyun { .compatible = "x-powers,axp806", .data = (void *)AXP806_ID },
68*4882a593Smuzhiyun { },
69*4882a593Smuzhiyun };
70*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, axp20x_i2c_of_match);
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun static const struct i2c_device_id axp20x_i2c_id[] = {
73*4882a593Smuzhiyun { "axp152", 0 },
74*4882a593Smuzhiyun { "axp202", 0 },
75*4882a593Smuzhiyun { "axp209", 0 },
76*4882a593Smuzhiyun { "axp221", 0 },
77*4882a593Smuzhiyun { "axp223", 0 },
78*4882a593Smuzhiyun { "axp803", 0 },
79*4882a593Smuzhiyun { "axp806", 0 },
80*4882a593Smuzhiyun { },
81*4882a593Smuzhiyun };
82*4882a593Smuzhiyun MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun #ifdef CONFIG_ACPI
85*4882a593Smuzhiyun static const struct acpi_device_id axp20x_i2c_acpi_match[] = {
86*4882a593Smuzhiyun {
87*4882a593Smuzhiyun .id = "INT33F4",
88*4882a593Smuzhiyun .driver_data = AXP288_ID,
89*4882a593Smuzhiyun },
90*4882a593Smuzhiyun { },
91*4882a593Smuzhiyun };
92*4882a593Smuzhiyun MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match);
93*4882a593Smuzhiyun #endif
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun static struct i2c_driver axp20x_i2c_driver = {
96*4882a593Smuzhiyun .driver = {
97*4882a593Smuzhiyun .name = "axp20x-i2c",
98*4882a593Smuzhiyun .of_match_table = of_match_ptr(axp20x_i2c_of_match),
99*4882a593Smuzhiyun .acpi_match_table = ACPI_PTR(axp20x_i2c_acpi_match),
100*4882a593Smuzhiyun },
101*4882a593Smuzhiyun .probe = axp20x_i2c_probe,
102*4882a593Smuzhiyun .remove = axp20x_i2c_remove,
103*4882a593Smuzhiyun .id_table = axp20x_i2c_id,
104*4882a593Smuzhiyun };
105*4882a593Smuzhiyun
106*4882a593Smuzhiyun module_i2c_driver(axp20x_i2c_driver);
107*4882a593Smuzhiyun
108*4882a593Smuzhiyun MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X");
109*4882a593Smuzhiyun MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
110*4882a593Smuzhiyun MODULE_LICENSE("GPL");
111