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https://github.com/edk2-porting/linux-next.git
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8b8495532c
This was introduced in commit
876989d (mfd: Add device tree probe support for mc13xxx)
for spi and later while introducing support for i2c copied to the i2c
driver.
Modifying driver details is very strange, for example probing an
mc13892 device (instantiated via dt) removes the driver's ability to
handle (traditionally probed) mc13783 devices in this case.
I'm not aware of any problems that make this hack necessary and if
there were some, they'd have to be fixed in the spi/i2c core, not in
a driver.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
123 lines
2.8 KiB
C
123 lines
2.8 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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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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mc13xxx = devm_kzalloc(&client->dev, 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 = devm_regmap_init_i2c(client,
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&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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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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