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git://projects.qi-hardware.com/openwrt-xburst.git
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72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
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/*
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* Custom GPIO-based I2C driver
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*
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* Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
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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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#include <linux/kernel.h>
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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/i2c-gpio.h>
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#define DRV_NAME "i2c-gpio-custom"
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#define DRV_DESC "Custom GPIO I2C device driver"
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static unsigned int sda = CONFIG_I2C_GPIO_CUSTOM_SDA;
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static unsigned int scl = CONFIG_I2C_GPIO_CUSTOM_SCL;
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static int id = CONFIG_I2C_GPIO_CUSTOM_DEVICE_ID;
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module_param(sda, uint, S_IRUGO);
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MODULE_PARM_DESC(sda, "GPIO pin for SDA");
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module_param(scl, uint, S_IRUGO);
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MODULE_PARM_DESC(scl, "GPIO pin for SCL");
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module_param(id, int, S_IRUGO);
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MODULE_PARM_DESC(id, "device id of the i2c-gpio device");
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static struct i2c_gpio_platform_data i2c_data;
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static struct platform_device i2c_device;
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static void i2c_gpio_custom_release(struct platform_device *pdev)
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{
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/* nothing to do */
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}
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static int __init i2c_gpio_custom_init(void)
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{
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int err;
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i2c_data.sda_pin = sda;
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i2c_data.scl_pin = scl;
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i2c_device.name = "i2c-gpio";
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i2c_device.id = id;
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i2c_device.dev.platform_data = &i2c_data,
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i2c_device.dev.release = i2c_gpio_custom_release,
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err = platform_device_register(&i2c_device);
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return err;
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}
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static void __exit i2c_gpio_custom_exit(void)
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{
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platform_device_unregister(&i2c_device);
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}
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module_init(i2c_gpio_custom_init);
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module_exit(i2c_gpio_custom_exit);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Gabor Juhos <juhosg at openwrt.org >");
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MODULE_DESCRIPTION(DRV_DESC);
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