On Sun, Jan 05, 2014 at 04:40:23PM +0100, Andrew Lunn wrote:
> > > +static int __init mvebu_soc_id_init(void)
> > > +{
> > > + struct device_node *np;
> > > + int ret = 0;
> > > +
> > > + np = of_find_matching_node(NULL, mvebu_pcie_of_match_table);
> > > + if (np) {
> > > + void __iomem *pci_base;
> > > + struct clk *clk;
> > > + /*
> > > + * ID and revision are available from any port, so we
> > > + * just pick the first one
> > > + */
> > > + struct device_node *child = of_get_next_child(np, NULL);
> >
> > I guess all this will fail if for some reason the PCIe node is not
> > present on machines that don't use PCIe.
>
> Hi Arnd
>
> That would be rather odd. These nodes are in the top level SoC dtsi
> file. When they are not used, they have status = "disabled" and are in
> the dtb blob with this state.
Hang on, you can't safely read from a disabled PCI node, it could have been
powered down by the bootloader..
Jason
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