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
 72static const struct i2c_device_id axp20x_i2c_id[] = {
 73	{ "axp152", 0 },
 74	{ "axp202", 0 },
 75	{ "axp209", 0 },
 76	{ "axp221", 0 },
 77	{ },
 78};
 79MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
 80
 81static const struct acpi_device_id axp20x_i2c_acpi_match[] = {
 82	{
 83		.id = "INT33F4",
 84		.driver_data = AXP288_ID,
 85	},
 86	{ },
 87};
 88MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match);
 89
 90static struct i2c_driver axp20x_i2c_driver = {
 91	.driver = {
 92		.name	= "axp20x-i2c",
 93		.of_match_table	= of_match_ptr(axp20x_i2c_of_match),
 94		.acpi_match_table = ACPI_PTR(axp20x_i2c_acpi_match),
 95	},
 96	.probe		= axp20x_i2c_probe,
 97	.remove		= axp20x_i2c_remove,
 98	.id_table	= axp20x_i2c_id,
 99};
100
101module_i2c_driver(axp20x_i2c_driver);
102
103MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X");
104MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
105MODULE_LICENSE("GPL");