71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
/*
|
|
* Custom GPIO-based I2C driver
|
|
*
|
|
* Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <linux/i2c-gpio.h>
|
|
|
|
#define DRV_NAME "i2c-gpio-custom"
|
|
#define DRV_DESC "Custom GPIO I2C device driver"
|
|
|
|
static unsigned int sda = CONFIG_I2C_GPIO_CUSTOM_SDA;
|
|
static unsigned int scl = CONFIG_I2C_GPIO_CUSTOM_SCL;
|
|
static int id = CONFIG_I2C_GPIO_CUSTOM_DEVICE_ID;
|
|
|
|
module_param(sda, uint, S_IRUGO);
|
|
MODULE_PARM_DESC(sda, "GPIO pin for SDA");
|
|
|
|
module_param(scl, uint, S_IRUGO);
|
|
MODULE_PARM_DESC(scl, "GPIO pin for SCL");
|
|
|
|
module_param(id, int, S_IRUGO);
|
|
MODULE_PARM_DESC(id, "device id of the i2c-gpio device");
|
|
|
|
static struct i2c_gpio_platform_data i2c_data;
|
|
static struct platform_device i2c_device;
|
|
|
|
static void i2c_gpio_custom_release(struct platform_device *pdev)
|
|
{
|
|
/* nothing to do */
|
|
}
|
|
|
|
static int __init i2c_gpio_custom_init(void)
|
|
{
|
|
int err;
|
|
|
|
i2c_data.sda_pin = sda;
|
|
i2c_data.scl_pin = scl;
|
|
|
|
i2c_device.name = "i2c-gpio";
|
|
i2c_device.id = id;
|
|
|
|
i2c_device.dev.platform_data = &i2c_data,
|
|
i2c_device.dev.release = i2c_gpio_custom_release,
|
|
|
|
err = platform_device_register(&i2c_device);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __exit i2c_gpio_custom_exit(void)
|
|
{
|
|
platform_device_unregister(&i2c_device);
|
|
}
|
|
|
|
module_init(i2c_gpio_custom_init);
|
|
module_exit(i2c_gpio_custom_exit);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Gabor Juhos <juhosg at openwrt.org >");
|
|
MODULE_DESCRIPTION(DRV_DESC);
|
|
|