On Mon, May 04, 2020 at 02:22:30PM +0530, Kishon Vijay Abraham I wrote: > Hi Lorenzo, > > On 5/1/2020 8:41 PM, Lorenzo Pieralisi wrote: > > 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 <kishon@xxxxxx> > >> --- > >> 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. > > This change was made due to RobH's comment below [1] > > [1] -> > https://lore.kernel.org/r/CAL_JsqLYScxGySy8xaN-UB6URfw8K_jSiuSXwVoTU9-RdJecww@xxxxxxxxxxxxxx/ Thanks for the pointer - that's what I needed to proceed with this patch. Lorenzo > Thanks > Kishon > > > > > 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 > >>
