On Fri, Apr 17, 2020 at 05:13:22PM +0530, Kishon Vijay Abraham I wrote:
> The PCI Bus Binding specification (IEEE Std 1275-1994 Revision 2.1 [1])
> defines both Vendor ID and Device ID to be 32-bits. Fix
> pcie-cadence-host.c driver to read 32-bit Vendor ID and Device ID
> properties from device tree.
>
> [1] -> https://www.devicetree.org/open-firmware/bindings/pci/pci2_1.pdf
>
> Signed-off-by: Kishon Vijay Abraham I <kis...@ti.com>
> ---
> drivers/pci/controller/cadence/pcie-cadence-host.c | 4 ++--
> drivers/pci/controller/cadence/pcie-cadence.h | 4 ++--
> 2 files changed, 4 insertions(+), 4 deletions(-)
I don't see how you would use a 32-bit value for a 16-bit register so
certainly the struct cdns_pcie_rc fields size is questionable anyway.
I *assume* you are referring to 4.1.2.1 and the property list
encoded as "encode-int".
I would like to get RobH's opinion on this - I don't know myself
whether the PCI OF bindings you added are still relevant and how
they should be interpreted.
Thanks
Lorenzo
> diff --git a/drivers/pci/controller/cadence/pcie-cadence-host.c
> b/drivers/pci/controller/cadence/pcie-cadence-host.c
> index 8f72967f298f..31e67c9c88cf 100644
> --- a/drivers/pci/controller/cadence/pcie-cadence-host.c
> +++ b/drivers/pci/controller/cadence/pcie-cadence-host.c
> @@ -229,10 +229,10 @@ int cdns_pcie_host_setup(struct cdns_pcie_rc *rc)
> }
>
> rc->vendor_id = 0xffff;
> - of_property_read_u16(np, "vendor-id", &rc->vendor_id);
> + of_property_read_u32(np, "vendor-id", &rc->vendor_id);
>
> rc->device_id = 0xffff;
> - of_property_read_u16(np, "device-id", &rc->device_id);
> + of_property_read_u32(np, "device-id", &rc->device_id);
>
> res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "reg");
> pcie->reg_base = devm_ioremap_resource(dev, res);
> diff --git a/drivers/pci/controller/cadence/pcie-cadence.h
> b/drivers/pci/controller/cadence/pcie-cadence.h
> index 6bd89a21bb1c..df14ad002fe9 100644
> --- a/drivers/pci/controller/cadence/pcie-cadence.h
> +++ b/drivers/pci/controller/cadence/pcie-cadence.h
> @@ -262,8 +262,8 @@ struct cdns_pcie_rc {
> struct resource *bus_range;
> void __iomem *cfg_base;
> u32 no_bar_nbits;
> - u16 vendor_id;
> - u16 device_id;
> + u32 vendor_id;
> + u32 device_id;
> };
>
> /**
> --
> 2.17.1
>
