diff options
Diffstat (limited to 'target/linux/adm5120')
| -rw-r--r-- | target/linux/adm5120/files/drivers/i2c/busses/i2c-gpio-custom.c | 71 | ||||
| -rw-r--r-- | target/linux/adm5120/patches-2.6.22/300-i2c_gpio_custom.patch | 53 |
2 files changed, 124 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 000000000..a019fafcc --- /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); + diff --git a/target/linux/adm5120/patches-2.6.22/300-i2c_gpio_custom.patch b/target/linux/adm5120/patches-2.6.22/300-i2c_gpio_custom.patch new file mode 100644 index 000000000..2bbb197d6 --- /dev/null +++ b/target/linux/adm5120/patches-2.6.22/300-i2c_gpio_custom.patch @@ -0,0 +1,53 @@ +--- linux-2.6.22.4.orig/drivers/i2c/busses/Kconfig 2007-08-21 06:33:06.000000000 +0200 ++++ linux-2.6.22.4/drivers/i2c/busses/Kconfig 2007-10-09 12:53:13.000000000 +0200 +@@ -125,6 +125,40 @@ + This is a very simple bitbanging I2C driver utilizing the + arch-neutral GPIO API to control the SCL and SDA lines. + ++config I2C_GPIO_CUSTOM ++ tristate "Custom GPIO-based I2C device" ++ depends on GENERIC_GPIO ++ select I2C_GPIO ++ help ++ This is an I2C driver to register a custom i2c-gpio device. ++ ++ This support is also available as a module. If so, the module ++ will be called i2c-gpio-dev. ++ ++config I2C_GPIO_CUSTOM_SDA ++ int "Custom GPIO pin for SDA" ++ depends on I2C_GPIO_CUSTOM ++ default "0" ++ help ++ Enter the GPIO pin number used for the SDA signal. This value can ++ also be specified with a module parameter. ++ ++config I2C_GPIO_CUSTOM_SCL ++ int "Custom GPIO pin for SCL" ++ depends on I2C_GPIO_CUSTOM ++ default "1" ++ help ++ Enter the GPIO pin number used for the SCL signal. This value can ++ also be specified with a module parameter. ++ ++config I2C_GPIO_CUSTOM_DEVICE_ID ++ int "Custom GPIO device id" ++ depends on I2C_GPIO_CUSTOM ++ default "0" ++ help ++ Enter the number used for the device id of the custom i2c-gpio device. ++ This value can also be specified with a module parameter. ++ + config I2C_HYDRA + tristate "CHRP Apple Hydra Mac I/O I2C interface" + depends on PCI && PPC_CHRP && EXPERIMENTAL +--- linux-2.6.22.4.orig/drivers/i2c/busses/Makefile 2007-08-21 06:33:06.000000000 +0200 ++++ linux-2.6.22.4/drivers/i2c/busses/Makefile 2007-10-09 12:07:45.000000000 +0200 +@@ -13,6 +13,7 @@ + obj-$(CONFIG_I2C_BLACKFIN_TWI) += i2c-bfin-twi.o + obj-$(CONFIG_I2C_ELEKTOR) += i2c-elektor.o + obj-$(CONFIG_I2C_GPIO) += i2c-gpio.o ++obj-$(CONFIG_I2C_GPIO_CUSTOM) += i2c-gpio-custom.o + obj-$(CONFIG_I2C_HYDRA) += i2c-hydra.o + obj-$(CONFIG_I2C_I801) += i2c-i801.o + obj-$(CONFIG_I2C_I810) += i2c-i810.o |