The following patch is a major cleanup of the IOP3xx I2C bus driver
that is found on Intel's IOP and IXP chipsets. The existing driver in
the 2.6 tree uses hardcoded I/O addresses based on board configuration
which is just going to get ugly as more chips use this unit. The update
switches to using the driver model and passing in the I/O addresses
via platform_device resources. The patch also updates the ID name to
more closely match the actual usage of the device.

I have tested this new driver on IXP46x systems and Dave Jiang has
tested it on both IOP321 and IOP331 systems. ARM-specific patches
to provide platform-level hooks will go upstream after this patch
is integrated.

An example of using the new driver (from IXP46x ARM code) follows:

static struct resource ixp46x_i2c_resources[] = {
	[0] = {
		.start 	= 0xc8011000,
		.end	= 0xc801101c,
		.flags	= IORESOURCE_MEM,
	},
	[1] = {
		.start 	= IRQ_IXP4XX_I2C,
		.end	= IRQ_IXP4XX_I2C,
		.flags	= IORESOURCE_IRQ
	}
};

static struct platform_device ixp46x_i2c_controller = {
	.name		= "IOP3xx-I2C",
	.id		= 0,
	.num_resources	= 2,
	.resource	= &ixp46x_i2c_resources
};

static struct platform_device *ixp46x_devices[] __initdata = {
	&ixp46x_i2c_controller
};

void __init ixp4xx_init(void)
{
	if (cpu_is_ixp46x()) {
		platform_add_devices(ixp46x_devices,
				ARRAY_SIZE(ixp46x_devices));
	}
}
Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>