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| author | Gabor Juhos <juhosg@openwrt.org> | 2007-10-09 19:23:22 +0000 |
|---|---|---|
| committer | Gabor Juhos <juhosg@openwrt.org> | 2007-10-09 19:23:22 +0000 |
| commit | c0fb2f61f4e1e6cb97a171e624b479e5fb451934 (patch) | |
| tree | 28d455ab73ef0ab5b5aad5034c85a798bf76c6c0 /target/linux/adm5120/files/drivers | |
| parent | 27baec04a1d707d5b6229509c66630bd6864a704 (diff) | |
| download | mtk-20170518-c0fb2f61f4e1e6cb97a171e624b479e5fb451934.zip mtk-20170518-c0fb2f61f4e1e6cb97a171e624b479e5fb451934.tar.gz mtk-20170518-c0fb2f61f4e1e6cb97a171e624b479e5fb451934.tar.bz2 | |
add custom GPIO-based I2C driver
SVN-Revision: 9218
Diffstat (limited to 'target/linux/adm5120/files/drivers')
| -rw-r--r-- | target/linux/adm5120/files/drivers/i2c/busses/i2c-gpio-custom.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/target/linux/adm5120/files/drivers/i2c/busses/i2c-gpio-custom.c b/target/linux/adm5120/files/drivers/i2c/busses/i2c-gpio-custom.c new file mode 100644 index 0000000..a019faf --- /dev/null +++ b/target/linux/adm5120/files/drivers/i2c/busses/i2c-gpio-custom.c @@ -0,0 +1,71 @@ +/* + * 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); + |