Re: [PATCH 2/2] powerpc/85xx: add Fman MDIO muxing support to the P4080DS

On 08/14/2012 06:08 PM, Timur Tabi wrote:

Scott Wood wrote:

quoted

If anything, I'd make the ordering be "wrong" to force that code path to
be tested -- though ideally there would be a more systematic approach to
such testing, that doesn't require inefficiency during normal boot.

I can't force the ordering to be wrong, because it's the only entry in the
list. The DPAA entries are not there yet.

Right, I mean once the DPAA entries are added.

This is what I have now:

static const struct of_device_id of_device_ids[] __devinitconst = {
	{
		.compatible	= "simple-bus"
	},
	{
		.compatible	= "fsl,srio",
	},
	{
		.compatible	= "fsl,p4080-pcie",
	},
	{
		.compatible	= "fsl,qoriq-pcie-v2.2",
	},
	{
		.compatible	= "fsl,qoriq-pcie-v2.3",
	},
	{
		.compatible	= "fsl,qoriq-pcie-v2.4",
	},
	/* The following two are for the Freescale hypervisor */
	{
		.name		= "hypervisor",
	},
	{
		.name		= "handles",
	},
	{
		/*
		 * Warning: this entry might need to be located before those
		 * for the Fman Ethernet nodes, although using EPROBE_DEFER
		 * in the DPAA drivers could fix that.
		 */
		.compatible	= "mdio-mux",
	},

I'd either say nothing here or say only "The ethernet driver should use
EPROBE_DEFER to ensure that the mdio-mux is probed first".  Don't give
whoever submits the DPAA ethernet driver the idea that relying on list
order is an acceptable solution.

-Scott