[PATCH] [POWERPC] 4xx: PCIe driver now detects if a port is disabled via the dev-tree

[Benjamin Herrenschmidt]

On Thu, 2008-06-05 at 16:22 +0200, Stefan Roese wrote:
> This patch add a check to the PPC4xx PCIe driver to detect if the port
> is disabled via the device-tree. This is needed for the AMCC Canyonlands
> board which has an option to either select 2 PCIe ports or 1 PCIe port
> and one SATA port. The SATA port and the 1st PCIe port pins are multiplexed
> so we can't start both drivers.
> 
> Signed-off-by: Stefan Roese <sr at denx.de>

Acked-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>

> ---
>  arch/powerpc/sysdev/ppc4xx_pci.c |    9 +++++++++
>  1 files changed, 9 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/powerpc/sysdev/ppc4xx_pci.c b/arch/powerpc/sysdev/ppc4xx_pci.c
> index b4a54c5..76886cf 100644
> --- a/arch/powerpc/sysdev/ppc4xx_pci.c
> +++ b/arch/powerpc/sysdev/ppc4xx_pci.c
> @@ -1634,6 +1634,15 @@ static void __init ppc4xx_probe_pciex_bridge(struct device_node *np)
>  	}
>  	port = &ppc4xx_pciex_ports[portno];
>  	port->index = portno;
> +
> +	/*
> +	 * Check if device is enabled
> +	 */
> +	if (!of_device_is_available(np)) {
> +		printk(KERN_INFO "PCIE%d: Port disabled via device-tree\n", port->index);
> +		return;
> +	}
> +
>  	port->node = of_node_get(np);
>  	pval = of_get_property(np, "sdr-base", NULL);
>  	if (pval == NULL) {