On Mon, Apr 24, 2023 at 11:38 AM Michal Simek <michal.simek@xxxxxxx> wrote:
>
> Hi,
>
> last week I found that dt_binding_check is not checking all errors with
> compatible string and I have no idea why. I have used 3 systems and behavior is
> pretty much the same.
> I am on the top of 6.3 kernel with
> dt-validate -V
> 2023.5.dev3+g31cc52ae483e
>
> And here is the behavior.
> Two compatible string I see errors but if I break only one compatible string I
> can't see erros. Not sure if this is issue with dt binding document or with host
> PC setup. Definitely thank you for any hint what to check.
>
> Thanks,
> Michal
>
>
> [linux](master)$ vim Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml
> [linux](master)$ git diff
> diff --git a/Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml
> b/Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml
> index 098b73134a1b..fbd9754ab0a3 100644
> --- a/Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml
> +++ b/Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml
> @@ -110,7 +110,7 @@ examples:
> usb@0 {
> #address-cells = <0x2>;
> #size-cells = <0x2>;
> - compatible = "xlnx,zynqmp-dwc3";
> + compatible = "xlnx,zynqmp-dwc32", "xlnx,zynqmp-dwc3";
> reg = <0x0 0xff9d0000 0x0 0x100>;
> clocks = <&zynqmp_clk USB0_BUS_REF>, <&zynqmp_clk USB3_DUAL_REF>;
> clock-names = "bus_clk", "ref_clk";
> [linux](master)$ make
> DT_SCHEMA_FILES=Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml
> dt_binding_check
> LINT Documentation/devicetree/bindings
> CHKDT Documentation/devicetree/bindings/processed-schema.json
> SCHEMA Documentation/devicetree/bindings/processed-schema.json
> DTEX Documentation/devicetree/bindings/usb/dwc3-xilinx.example.dts
> DTC_CHK Documentation/devicetree/bindings/usb/dwc3-xilinx.example.dtb
> /dev/shm/linux/Documentation/devicetree/bindings/usb/dwc3-xilinx.example.dtb:
> usb@0: compatible:0: 'xlnx,zynqmp-dwc32' is not one of ['xlnx,zynqmp-dwc3',
> 'xlnx,versal-dwc3']
> From schema: /dev/shm/linux/Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml
> /dev/shm/linux/Documentation/devicetree/bindings/usb/dwc3-xilinx.example.dtb:
> usb@0: compatible: ['xlnx,zynqmp-dwc32', 'xlnx,zynqmp-dwc3'] is too long
> From schema: /dev/shm/linux/Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml
>
>
>
> [linux](master)$ vim Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml
> [linux](master)$ git diff Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml
> diff --git a/Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml
> b/Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml
> index 098b73134a1b..0b8985bf9b0b 100644
> --- a/Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml
> +++ b/Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml
> @@ -110,7 +110,7 @@ examples:
> usb@0 {
> #address-cells = <0x2>;
> #size-cells = <0x2>;
> - compatible = "xlnx,zynqmp-dwc3";
> + compatible = "xlnx,zynqmp-dwc32";
> reg = <0x0 0xff9d0000 0x0 0x100>;
> clocks = <&zynqmp_clk USB0_BUS_REF>, <&zynqmp_clk USB3_DUAL_REF>;
> clock-names = "bus_clk", "ref_clk";
> [linux](master)$ make
> DT_SCHEMA_FILES=Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml
> dt_binding_check
> LINT Documentation/devicetree/bindings
> CHKDT Documentation/devicetree/bindings/processed-schema.json
> SCHEMA Documentation/devicetree/bindings/processed-schema.json
> DTEX Documentation/devicetree/bindings/usb/dwc3-xilinx.example.dts
> DTC_CHK Documentation/devicetree/bindings/usb/dwc3-xilinx.example.dtb
'compatible' is how we decide whether to apply a schema or not (by
default if there is no 'select' entry). If you have an unknown
compatible, then no schema is going to be applied (except ones that
always get applied). The way we check for unknown compatible strings
is with the '-m' option on dt-validate. That's turned on for
dtbs_check, but off for dt_binding_check until the remaining 20-30
warnings are fixed. Also, I don't think that works in conjunction with
DT_SCHEMA_FILES being set.
Rob
