1/*
  2 * Copyright 2009-2010 Creative Product Design
  3 * Marc Reilly marc@cpdesign.com.au
  4 *
  5 * This program is free software; you can redistribute it and/or modify it under
  6 * the terms of the GNU General Public License version 2 as published by the
  7 * Free Software Foundation.
  8 */
  9
 10#include <linux/slab.h>
 11#include <linux/module.h>
 12#include <linux/platform_device.h>
 13#include <linux/mfd/core.h>
 14#include <linux/mfd/mc13xxx.h>
 15#include <linux/of.h>
 16#include <linux/of_device.h>
 17#include <linux/of_gpio.h>
 18#include <linux/i2c.h>
 19#include <linux/err.h>
 20
 21#include "mc13xxx.h"
 22
 23static const struct i2c_device_id mc13xxx_i2c_device_id[] = {
 24	{
 25		.name = "mc13892",
 26		.driver_data = (kernel_ulong_t)&mc13xxx_variant_mc13892,
 27	}, {
 28		.name = "mc34708",
 29		.driver_data = (kernel_ulong_t)&mc13xxx_variant_mc34708,
 30	}, {
 31		/* sentinel */
 32	}
 33};
 34MODULE_DEVICE_TABLE(i2c, mc13xxx_i2c_device_id);
 35
 36static const struct of_device_id mc13xxx_dt_ids[] = {
 37	{
 38		.compatible = "fsl,mc13892",
 39		.data = &mc13xxx_variant_mc13892,
 40	}, {
 41		.compatible = "fsl,mc34708",
 42		.data = &mc13xxx_variant_mc34708,
 43	}, {
 44		/* sentinel */
 45	}
 46};
 47MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
 48
 49static struct regmap_config mc13xxx_regmap_i2c_config = {
 50	.reg_bits = 8,
 51	.val_bits = 24,
 52
 53	.max_register = MC13XXX_NUMREGS,
 54
 55	.cache_type = REGCACHE_NONE,
 56};
 57
 58static int mc13xxx_i2c_probe(struct i2c_client *client,
 59		const struct i2c_device_id *id)
 60{
 61	struct mc13xxx *mc13xxx;
 62	int ret;
 63
 64	mc13xxx = devm_kzalloc(&client->dev, sizeof(*mc13xxx), GFP_KERNEL);
 65	if (!mc13xxx)
 66		return -ENOMEM;
 67
 68	dev_set_drvdata(&client->dev, mc13xxx);
 69
 70	mc13xxx->irq = client->irq;
 71
 72	mc13xxx->regmap = devm_regmap_init_i2c(client,
 73					       &mc13xxx_regmap_i2c_config);
 74	if (IS_ERR(mc13xxx->regmap)) {
 75		ret = PTR_ERR(mc13xxx->regmap);
 76		dev_err(&client->dev, "Failed to initialize regmap: %d\n", ret);
 77		return ret;
 78	}
 79
 80	if (client->dev.of_node) {
 81		const struct of_device_id *of_id =
 82			of_match_device(mc13xxx_dt_ids, &client->dev);
 83		mc13xxx->variant = of_id->data;
 84	} else {
 85		mc13xxx->variant = (void *)id->driver_data;
 86	}
 87
 88	return mc13xxx_common_init(&client->dev);
 89}
 90
 91static int mc13xxx_i2c_remove(struct i2c_client *client)
 92{
 93	return mc13xxx_common_exit(&client->dev);
 94}
 95
 96static struct i2c_driver mc13xxx_i2c_driver = {
 97	.id_table = mc13xxx_i2c_device_id,
 98	.driver = {
 99		.owner = THIS_MODULE,
100		.name = "mc13xxx",
101		.of_match_table = mc13xxx_dt_ids,
102	},
103	.probe = mc13xxx_i2c_probe,
104	.remove = mc13xxx_i2c_remove,
105};
106
107static int __init mc13xxx_i2c_init(void)
108{
109	return i2c_add_driver(&mc13xxx_i2c_driver);
110}
111subsys_initcall(mc13xxx_i2c_init);
112
113static void __exit mc13xxx_i2c_exit(void)
114{
115	i2c_del_driver(&mc13xxx_i2c_driver);
116}
117module_exit(mc13xxx_i2c_exit);
118
119MODULE_DESCRIPTION("i2c driver for Freescale MC13XXX PMIC");
120MODULE_AUTHOR("Marc Reilly <marc@cpdesign.com.au");
121MODULE_LICENSE("GPL v2");