Migrate all ixp4xx devices to the bitbanging I2C bus driver utilizing
the arch-neutral GPIO API (linux/i2c-gpio.h).

Tested by the nslu2-linux and openwrt projects in public firmware releases.

Acked-by: Rod Whitby <rod@whitby.id.au>
Signed-off-by: Michael-Luke Jones <mlj28@cam.ac.uk>

Index: linux-2.6.24-armeb/arch/arm/mach-ixp4xx/nslu2-setup.c
===================================================================
--- linux-2.6.24-armeb.orig/arch/arm/mach-ixp4xx/nslu2-setup.c	2008-01-30 13:35:20.000000000 +1030
+++ linux-2.6.24-armeb/arch/arm/mach-ixp4xx/nslu2-setup.c	2008-01-30 13:35:39.000000000 +1030
@@ -18,6 +18,7 @@
 #include <linux/serial.h>
 #include <linux/serial_8250.h>
 #include <linux/leds.h>
+#include <linux/i2c-gpio.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -41,7 +42,7 @@
 	.resource		= &nslu2_flash_resource,
 };
 
-static struct ixp4xx_i2c_pins nslu2_i2c_gpio_pins = {
+static struct i2c_gpio_platform_data nslu2_i2c_gpio_data = {
 	.sda_pin		= NSLU2_SDA_PIN,
 	.scl_pin		= NSLU2_SCL_PIN,
 };
@@ -82,11 +83,12 @@
 };
 #endif
 
-static struct platform_device nslu2_i2c_controller = {
-	.name			= "IXP4XX-I2C",
+static struct platform_device nslu2_i2c_gpio = {
+	.name			= "i2c-gpio",
 	.id			= 0,
-	.dev.platform_data	= &nslu2_i2c_gpio_pins,
-	.num_resources		= 0,
+	.dev	 = {
+		.platform_data	= &nslu2_i2c_gpio_data,
+	},
 };
 
 static struct platform_device nslu2_beeper = {
@@ -139,7 +141,7 @@
 };
 
 static struct platform_device *nslu2_devices[] __initdata = {
-	&nslu2_i2c_controller,
+	&nslu2_i2c_gpio,
 	&nslu2_flash,
 	&nslu2_beeper,
 #ifdef CONFIG_LEDS_IXP4XX
Index: linux-2.6.24-armeb/arch/arm/mach-ixp4xx/nas100d-setup.c
===================================================================
--- linux-2.6.24-armeb.orig/arch/arm/mach-ixp4xx/nas100d-setup.c	2008-01-30 13:35:20.000000000 +1030
+++ linux-2.6.24-armeb/arch/arm/mach-ixp4xx/nas100d-setup.c	2008-01-30 13:35:39.000000000 +1030
@@ -16,6 +16,7 @@
 #include <linux/serial.h>
 #include <linux/serial_8250.h>
 #include <linux/leds.h>
+#include <linux/i2c-gpio.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -68,16 +69,17 @@
 };
 #endif
 
-static struct ixp4xx_i2c_pins nas100d_i2c_gpio_pins = {
+static struct i2c_gpio_platform_data nas100d_i2c_gpio_data = {
 	.sda_pin		= NAS100D_SDA_PIN,
 	.scl_pin		= NAS100D_SCL_PIN,
 };
 
-static struct platform_device nas100d_i2c_controller = {
-	.name			= "IXP4XX-I2C",
+static struct platform_device nas100d_i2c_gpio = {
+	.name			= "i2c-gpio",
 	.id			= 0,
-	.dev.platform_data	= &nas100d_i2c_gpio_pins,
-	.num_resources		= 0,
+	.dev	 = {
+		.platform_data	= &nas100d_i2c_gpio_data,
+	},
 };
 
 static struct resource nas100d_uart_resources[] = {
@@ -124,7 +126,7 @@
 };
 
 static struct platform_device *nas100d_devices[] __initdata = {
-	&nas100d_i2c_controller,
+	&nas100d_i2c_gpio,
 	&nas100d_flash,
 #ifdef CONFIG_LEDS_IXP4XX
 	&nas100d_leds,
Index: linux-2.6.24-armeb/arch/arm/mach-ixp4xx/dsmg600-setup.c
===================================================================
--- linux-2.6.24-armeb.orig/arch/arm/mach-ixp4xx/dsmg600-setup.c	2008-01-30 13:35:20.000000000 +1030
+++ linux-2.6.24-armeb/arch/arm/mach-ixp4xx/dsmg600-setup.c	2008-01-30 13:35:39.000000000 +1030
@@ -14,6 +14,7 @@
 #include <linux/kernel.h>
 #include <linux/serial.h>
 #include <linux/serial_8250.h>
+#include <linux/i2c-gpio.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -37,15 +38,17 @@
 	.resource		= &dsmg600_flash_resource,
 };
 
-static struct ixp4xx_i2c_pins dsmg600_i2c_gpio_pins = {
+static struct i2c_gpio_platform_data dsmg600_i2c_gpio_data = {
 	.sda_pin		= DSMG600_SDA_PIN,
 	.scl_pin		= DSMG600_SCL_PIN,
 };
 
-static struct platform_device dsmg600_i2c_controller = {
-	.name			= "IXP4XX-I2C",
+static struct platform_device dsmg600_i2c_gpio = {
+	.name			= "i2c-gpio",
 	.id			= 0,
-	.dev.platform_data	= &dsmg600_i2c_gpio_pins,
+	.dev	 = {
+		.platform_data	= &dsmg600_i2c_gpio_data,
+	},
 };
 
 #ifdef CONFIG_LEDS_CLASS
@@ -116,7 +119,7 @@
 };
 
 static struct platform_device *dsmg600_devices[] __initdata = {
-	&dsmg600_i2c_controller,
+	&dsmg600_i2c_gpio,
 	&dsmg600_flash,
 };
 
Index: linux-2.6.24-armeb/arch/arm/mach-ixp4xx/ixdp425-setup.c
===================================================================
--- linux-2.6.24-armeb.orig/arch/arm/mach-ixp4xx/ixdp425-setup.c	2008-01-30 13:32:18.000000000 +1030
+++ linux-2.6.24-armeb/arch/arm/mach-ixp4xx/ixdp425-setup.c	2008-01-30 13:35:39.000000000 +1030
@@ -15,6 +15,7 @@
 #include <linux/tty.h>
 #include <linux/serial_8250.h>
 #include <linux/slab.h>
+#include <linux/i2c-gpio.h>
 #include <linux/io.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/nand.h>
@@ -120,18 +121,17 @@
 };
 #endif	/* CONFIG_MTD_NAND_PLATFORM */
 
-static struct ixp4xx_i2c_pins ixdp425_i2c_gpio_pins = {
+static struct i2c_gpio_platform_data ixdp425_i2c_gpio_data = {
 	.sda_pin	= IXDP425_SDA_PIN,
 	.scl_pin	= IXDP425_SCL_PIN,
 };
 
-static struct platform_device ixdp425_i2c_controller = {
-	.name		= "IXP4XX-I2C",
+static struct platform_device ixdp425_i2c_gpio = {
+	.name		= "i2c-gpio",
 	.id		= 0,
-	.dev		= {
-		.platform_data = &ixdp425_i2c_gpio_pins,
+	.dev	 = {
+		.platform_data	= &ixdp425_i2c_gpio_data,
 	},
-	.num_resources	= 0
 };
 
 static struct resource ixdp425_uart_resources[] = {
@@ -178,7 +178,7 @@
 };
 
 static struct platform_device *ixdp425_devices[] __initdata = {
-	&ixdp425_i2c_controller,
+	&ixdp425_i2c_gpio,
 	&ixdp425_flash,
 #if defined(CONFIG_MTD_NAND_PLATFORM) || \
     defined(CONFIG_MTD_NAND_PLATFORM_MODULE)