df3df6469f
Adds support for mc13xxx family ICs connected via i2c. Signed-off-by: Marc Reilly <marc@cpdesign.com.au> Acked-by: Oskar Schirmer <oskar@scara.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
128 lines
3 KiB
C
128 lines
3 KiB
C
/*
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* Copyright 2009-2010 Creative Product Design
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* Marc Reilly marc@cpdesign.com.au
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License version 2 as published by the
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* Free Software Foundation.
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*/
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/mutex.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/mc13xxx.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <linux/i2c.h>
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#include <linux/err.h>
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#include "mc13xxx.h"
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static const struct i2c_device_id mc13xxx_i2c_device_id[] = {
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{
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.name = "mc13892",
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.driver_data = MC13XXX_ID_MC13892,
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}, {
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/* sentinel */
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}
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};
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MODULE_DEVICE_TABLE(i2c, mc13xxx_i2c_device_id);
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static const struct of_device_id mc13xxx_dt_ids[] = {
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{
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.compatible = "fsl,mc13892",
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.data = (void *) &mc13xxx_i2c_device_id[0],
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}, {
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/* sentinel */
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}
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};
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MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
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static struct regmap_config mc13xxx_regmap_i2c_config = {
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.reg_bits = 8,
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.val_bits = 24,
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.max_register = MC13XXX_NUMREGS,
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.cache_type = REGCACHE_NONE,
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};
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static int mc13xxx_i2c_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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const struct of_device_id *of_id;
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struct i2c_driver *idrv = to_i2c_driver(client->dev.driver);
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struct mc13xxx *mc13xxx;
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struct mc13xxx_platform_data *pdata = dev_get_platdata(&client->dev);
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int ret;
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of_id = of_match_device(mc13xxx_dt_ids, &client->dev);
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if (of_id)
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idrv->id_table = (const struct i2c_device_id*) of_id->data;
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mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL);
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if (!mc13xxx)
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return -ENOMEM;
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dev_set_drvdata(&client->dev, mc13xxx);
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mc13xxx->dev = &client->dev;
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mutex_init(&mc13xxx->lock);
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mc13xxx->regmap = regmap_init_i2c(client, &mc13xxx_regmap_i2c_config);
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if (IS_ERR(mc13xxx->regmap)) {
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ret = PTR_ERR(mc13xxx->regmap);
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dev_err(mc13xxx->dev, "Failed to initialize register map: %d\n",
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ret);
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dev_set_drvdata(&client->dev, NULL);
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kfree(mc13xxx);
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return ret;
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}
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ret = mc13xxx_common_init(mc13xxx, pdata, client->irq);
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if (ret == 0 && (id->driver_data != mc13xxx->ictype))
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dev_warn(mc13xxx->dev,
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"device id doesn't match auto detection!\n");
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return ret;
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}
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static int __devexit mc13xxx_i2c_remove(struct i2c_client *client)
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{
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struct mc13xxx *mc13xxx = dev_get_drvdata(&client->dev);
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mc13xxx_common_cleanup(mc13xxx);
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return 0;
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}
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static struct i2c_driver mc13xxx_i2c_driver = {
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.id_table = mc13xxx_i2c_device_id,
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.driver = {
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.owner = THIS_MODULE,
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.name = "mc13xxx",
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.of_match_table = mc13xxx_dt_ids,
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},
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.probe = mc13xxx_i2c_probe,
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.remove = __devexit_p(mc13xxx_i2c_remove),
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};
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static int __init mc13xxx_i2c_init(void)
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{
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return i2c_add_driver(&mc13xxx_i2c_driver);
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}
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subsys_initcall(mc13xxx_i2c_init);
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static void __exit mc13xxx_i2c_exit(void)
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{
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i2c_del_driver(&mc13xxx_i2c_driver);
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}
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module_exit(mc13xxx_i2c_exit);
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MODULE_DESCRIPTION("i2c driver for Freescale MC13XXX PMIC");
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MODULE_AUTHOR("Marc Reilly <marc@cpdesign.com.au");
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MODULE_LICENSE("GPL v2");
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