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95 lines
2.0 KiB
C
95 lines
2.0 KiB
C
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/*
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* drivers/gpio/max7300.c
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*
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* Copyright (C) 2009 Wolfram Sang, Pengutronix
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Check max730x.c for further details.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/mutex.h>
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#include <linux/i2c.h>
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#include <linux/spi/max7301.h>
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static int max7300_i2c_write(struct device *dev, unsigned int reg,
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unsigned int val)
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{
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struct i2c_client *client = to_i2c_client(dev);
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return i2c_smbus_write_byte_data(client, reg, val);
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}
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static int max7300_i2c_read(struct device *dev, unsigned int reg)
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{
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struct i2c_client *client = to_i2c_client(dev);
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return i2c_smbus_read_byte_data(client, reg);
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}
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static int __devinit max7300_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct max7301 *ts;
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int ret;
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if (!i2c_check_functionality(client->adapter,
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I2C_FUNC_SMBUS_BYTE_DATA))
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return -EIO;
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ts = kzalloc(sizeof(struct max7301), GFP_KERNEL);
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if (!ts)
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return -ENOMEM;
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ts->read = max7300_i2c_read;
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ts->write = max7300_i2c_write;
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ts->dev = &client->dev;
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ret = __max730x_probe(ts);
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if (ret)
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kfree(ts);
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return ret;
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}
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static int __devexit max7300_remove(struct i2c_client *client)
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{
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return __max730x_remove(&client->dev);
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}
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static const struct i2c_device_id max7300_id[] = {
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{ "max7300", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, max7300_id);
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static struct i2c_driver max7300_driver = {
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.driver = {
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.name = "max7300",
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.owner = THIS_MODULE,
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},
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.probe = max7300_probe,
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.remove = __devexit_p(max7300_remove),
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.id_table = max7300_id,
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};
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static int __init max7300_init(void)
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{
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return i2c_add_driver(&max7300_driver);
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}
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subsys_initcall(max7300_init);
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static void __exit max7300_exit(void)
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{
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i2c_del_driver(&max7300_driver);
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}
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module_exit(max7300_exit);
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MODULE_AUTHOR("Wolfram Sang");
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("MAX7300 GPIO-Expander");
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