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
 25static 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
 52static 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
 60static 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,axp803", .data = (void *)AXP803_ID },
 69	{ .compatible = "x-powers,axp806", .data = (void *)AXP806_ID },
 70	{ .compatible = "x-powers,axp15060", .data = (void *)AXP15060_ID },
 71	{ },
 72};
 73MODULE_DEVICE_TABLE(of, axp20x_i2c_of_match);
 74#endif
 75
 76static const struct i2c_device_id axp20x_i2c_id[] = {
 77	{ "axp152", 0 },
 78	{ "axp192", 0 },
 79	{ "axp202", 0 },
 80	{ "axp209", 0 },
 81	{ "axp221", 0 },
 82	{ "axp223", 0 },
 83	{ "axp313a", 0 },
 84	{ "axp803", 0 },
 85	{ "axp806", 0 },
 86	{ "axp15060", 0 },
 87	{ },
 88};
 89MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
 90
 91#ifdef CONFIG_ACPI
 92static const struct acpi_device_id axp20x_i2c_acpi_match[] = {
 93	{
 94		.id = "INT33F4",
 95		.driver_data = AXP288_ID,
 96	},
 97	{ },
 98};
 99MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match);
100#endif
101
102static struct i2c_driver axp20x_i2c_driver = {
103	.driver = {
104		.name	= "axp20x-i2c",
105		.of_match_table	= of_match_ptr(axp20x_i2c_of_match),
106		.acpi_match_table = ACPI_PTR(axp20x_i2c_acpi_match),
107	},
108	.probe		= axp20x_i2c_probe,
109	.remove		= axp20x_i2c_remove,
110	.id_table	= axp20x_i2c_id,
111};
112
113module_i2c_driver(axp20x_i2c_driver);
114
115MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X");
116MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
117MODULE_LICENSE("GPL");