linux-kernel - Re: [Reoprt] Some compile warning on ppc dts

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Date:   Wed, 2 Mar 2022 17:23:38 +0100
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     "chenjun (AM)" <chenjun102@...wei.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        Rob Herring <robh+dt@...nel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Cc:     "Xiangrui (Euler)" <rui.xiang@...wei.com>
Subject: Re: [Reoprt] Some compile warning on ppc dts



Le 01/03/2021 à 03:16, chenjun (AM) a écrit :
> Hi
> 
> After run the following commands
> make distclean
> make allmodconfig ARCH=powerpc CROSS_COMPILE=powerpc64-linux-gnu-
> make oldconfig ARCH=powerpc CROSS_COMPILE=powerpc64-linux-gnu-
> make -j64 ARCH=powerpc CROSS_COMPILE=powerpc64-linux-gnu-
> 
> I get some warning:
> arch/powerpc/boot/dts/mpc5200b.dtsi:267.20-280.4: Warning (pci_bridge):
> /pci@...00d00: missing ranges for PCI bridg
> e (or not a bridge)
> arch/powerpc/boot/dts/o2dnt2.dtb: Warning (pci_device_bus_num): Failed
> prerequisite 'pci_bridge'
> arch/powerpc/boot/dts/mpc5200b.dtsi:182.18-186.5: Warning
> (spi_bus_bridge): /soc5200@...00000/psc@...0: node name f
> or SPI buses should be 'spi'
>     also defined at arch/powerpc/boot/dts/o2d.dtsi:32.12-43.5
> arch/powerpc/boot/dts/o2dnt2.dtb: Warning (spi_bus_reg): Failed
> prerequisite 'spi_bus_bridge'
> ...
> 
> For the problem about "node name for SPI buses should be 'spi'":
> Rename the psc@...0 to spi@...0 in arch/powerpc/boot/dts/o2d.dtsi can
> fix it.
> diff --git a/arch/powerpc/boot/dts/o2d.dtsi b/arch/powerpc/boot/dts/o2d.dtsi
> index 6661955a2be4..cd3dc70cd72e 100644
> --- a/arch/powerpc/boot/dts/o2d.dtsi
> +++ b/arch/powerpc/boot/dts/o2d.dtsi
> @@ -29,7 +29,7 @@ rtc@800 {
>    >------>------->-------status = "disabled";
>    >------>-------};
> -
> ->------>-------psc@...0 {>----->-------// PSC1
> +>------>-------spi@...0 {>----->-------// PSC1
>    >------>------->-------compatible =
> "fsl,mpc5200b-psc-spi","fsl,mpc5200-psc-spi";
>    >------>------->-------#address-cells = <1>;
>    >------>------->-------#size-cells = <0>;
> ---
> 
> For the problem about "missing ranges for PCI bridge (or not a bridge)":
> Ranges should be add in arch/powerpc/boot/dts/mpc5200b.dtsi.
>   >-------pci: pci@...00d00 {
>   >------->-------#interrupt-cells = <1>;
>   >------->-------#size-cells = <2>;
>   >------->-------#address-cells = <3>;
>   >------->-------device_type = "pci";
>   >------->-------compatible = "fsl,mpc5200b-pci","fsl,mpc5200-pci";
>   >------->-------reg = <0xf0000d00 0x100>;
>   >------->-------// interrupt-map-mask = need to add
>   >------->-------// interrupt-map = need to add
>   >------->-------clock-frequency = <0>; // From boot loader
>   >------->-------interrupts = <2 8 0 2 9 0 2 10 0>;
>   >------->-------bus-range = <0 0>;
>   >------->-------// ranges = need to add
>   >-------};
> I think the ranges should be add by someone who knows the mpc5200 better.
> 


This patch has garbage instead of tabs, it doesn't apply