Re: [PATCH v20 14/19] dt-bindings: PCI: renesas: Add R-Car Gen4 PCIe Host

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Hi Shimoda-san,

On Fri, Aug 25, 2023 at 3:18 PM Yoshihiro Shimoda
<yoshihiro.shimoda.uh@xxxxxxxxxxx> wrote:
> Document bindings for Renesas R-Car Gen4 and R-Car S4-8 (R8A779F0)
> PCIe host module.
>
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
> Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
> Reviewed-by: Serge Semin <fancer.lancer@xxxxxxxxx>

Thanks for your patch!

> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml
> @@ -0,0 +1,123 @@

> +  resets:
> +    maxItems: 1
> +
> +  resets-names:

reset-names

> +    items:
> +      - const: pwr
> +
> +  max-link-speed:
> +    maximum: 4
> +
> +  num-lanes:
> +    maximum: 4
> +
> +required:
> +  - compatible
> +  - reg

Missing "reg-names".

> +  - interrupts
> +  - clocks
> +  - clock-names
> +  - power-domains
> +  - resets
> +  - reset-names
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/r8a779f0-cpg-mssr.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/power/r8a779f0-sysc.h>
> +
> +    soc {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        pcie: pcie@e65d0000 {
> +            compatible = "renesas,r8a779f0-pcie", "renesas,rcar-gen4-pcie";
> +            reg = <0 0xe65d0000 0 0x1000>, <0 0xe65d2000 0 0x0800>,
> +                  <0 0xe65d3000 0 0x2000>, <0 0xe65d5000 0 0x1200>,
> +                  <0 0xe65d6200 0 0x0e00>, <0 0xfe000000 0 0x400000>;

The lenght "0x0e00" does not match your DTS patch
https://lore.kernel.org/linux-renesas-soc/20230828041434.2747699-2-yoshihiro.shimoda.uh@xxxxxxxxxxx

> +            reg-names = "dbi", "dbi2", "atu", "dma", "app", "config";
> +            #address-cells = <3>;
> +            #size-cells = <2>;
> +            bus-range = <0x00 0xff>;
> +            device_type = "pci";
> +            ranges = <0x01000000 0 0x00000000 0 0xfe000000 0 0x00400000>,
> +                     <0x02000000 0 0x30000000 0 0x30000000 0 0x10000000>;
> +            dma-ranges = <0x42000000 0 0x00000000 0 0x00000000 1 0x00000000>;
> +            interrupts = <GIC_SPI 416 IRQ_TYPE_LEVEL_HIGH>,
> +                         <GIC_SPI 417 IRQ_TYPE_LEVEL_HIGH>,
> +                         <GIC_SPI 418 IRQ_TYPE_LEVEL_HIGH>,
> +                         <GIC_SPI 422 IRQ_TYPE_LEVEL_HIGH>;

What about SPI 419, 420, 421?

> +            interrupt-names = "msi", "dma", "sft_ce", "app";
> +            #interrupt-cells = <1>;
> +            interrupt-map-mask = <0 0 0 7>;
> +            interrupt-map = <0 0 0 1 &gic GIC_SPI 416 IRQ_TYPE_LEVEL_HIGH>,
> +                            <0 0 0 2 &gic GIC_SPI 416 IRQ_TYPE_LEVEL_HIGH>,
> +                            <0 0 0 3 &gic GIC_SPI 416 IRQ_TYPE_LEVEL_HIGH>,
> +                            <0 0 0 4 &gic GIC_SPI 416 IRQ_TYPE_LEVEL_HIGH>;
> +            clocks = <&cpg CPG_MOD 624>, <&clkref>;
> +            clock-names = "core", "ref";
> +            power-domains = <&sysc R8A779F0_PD_ALWAYS_ON>;
> +            resets = <&cpg 624>;
> +            reset-names = "pwr";
> +            num-lanes = <2>;
> +            snps,enable-cdm-check;
> +            max-link-speed = <4>;
> +        };
> +    };

BTW, I think it would be good to make the order of the properties and
in the example match between the host and endpoint bindings, to make
the output of
"diff Documentation/devicetree/bindings/pci/rcar-gen4-pci-{host,ep}.yaml"
as small as possible.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds


> +  - interrupts
> +  - clocks
> +  - clock-names
> +  - power-domains
> +  - resets
> +  - reset-names
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/r8a779f0-cpg-mssr.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/power/r8a779f0-sysc.h>
> +
> +    soc {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        pcie: pcie@e65d0000 {
> +            compatible = "renesas,r8a779f0-pcie", "renesas,rcar-gen4-pcie";
> +            reg = <0 0xe65d0000 0 0x1000>, <0 0xe65d2000 0 0x0800>,
> +                  <0 0xe65d3000 0 0x2000>, <0 0xe65d5000 0 0x1200>,
> +                  <0 0xe65d6200 0 0x0e00>, <0 0xfe000000 0 0x400000>;
> +            reg-names = "dbi", "dbi2", "atu", "dma", "app", "config";
> +            #address-cells = <3>;
> +            #size-cells = <2>;
> +            bus-range = <0x00 0xff>;
> +            device_type = "pci";
> +            ranges = <0x01000000 0 0x00000000 0 0xfe000000 0 0x00400000>,
> +                     <0x02000000 0 0x30000000 0 0x30000000 0 0x10000000>;
> +            dma-ranges = <0x42000000 0 0x00000000 0 0x00000000 1 0x00000000>;
> +            interrupts = <GIC_SPI 416 IRQ_TYPE_LEVEL_HIGH>,
> +                         <GIC_SPI 417 IRQ_TYPE_LEVEL_HIGH>,
> +                         <GIC_SPI 418 IRQ_TYPE_LEVEL_HIGH>,
> +                         <GIC_SPI 422 IRQ_TYPE_LEVEL_HIGH>;
> +            interrupt-names = "msi", "dma", "sft_ce", "app";
> +            #interrupt-cells = <1>;
> +            interrupt-map-mask = <0 0 0 7>;
> +            interrupt-map = <0 0 0 1 &gic GIC_SPI 416 IRQ_TYPE_LEVEL_HIGH>,
> +                            <0 0 0 2 &gic GIC_SPI 416 IRQ_TYPE_LEVEL_HIGH>,
> +                            <0 0 0 3 &gic GIC_SPI 416 IRQ_TYPE_LEVEL_HIGH>,
> +                            <0 0 0 4 &gic GIC_SPI 416 IRQ_TYPE_LEVEL_HIGH>;
> +            clocks = <&cpg CPG_MOD 624>, <&clkref>;
> +            clock-names = "core", "ref";
> +            power-domains = <&sysc R8A779F0_PD_ALWAYS_ON>;
> +            resets = <&cpg 624>;
> +            reset-names = "pwr";
> +            num-lanes = <2>;
> +            snps,enable-cdm-check;
> +            max-link-speed = <4>;
> +        };
> +    };
> --
> 2.25.1
>


--
Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds



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