linux-kernel - Re: [PATCH v3 13/15] riscv: dts: canaan: fix bus {ranges,reg} warnings

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Message-ID: <Yr3UKQ/772oFyvc6@x1-carbon>
Date:   Thu, 30 Jun 2022 16:49:46 +0000
From:   Niklas Cassel <Niklas.Cassel@....com>
To:     Conor Dooley <mail@...chuod.ie>
CC:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>,
        Vinod Koul <vkoul@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Serge Semin <fancer.lancer@...il.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Palmer Dabbelt <palmer@...osinc.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Dillon Min <dillon.minfei@...il.com>,
        Jose Abreu <joabreu@...opsys.com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "linux-spi@...r.kernel.org" <linux-spi@...r.kernel.org>,
        "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>
Subject: Re: [PATCH v3 13/15] riscv: dts: canaan: fix bus {ranges,reg}
 warnings

On Wed, Jun 29, 2022 at 07:43:42PM +0100, Conor Dooley wrote:
> From: Conor Dooley <conor.dooley@...rochip.com>
> 
> The k210 devicetrees warn about missing/empty reg and/or ranges
> properties:
> arch/riscv/boot/dts/canaan/k210.dtsi:408.22-460.5: Warning (unit_address_vs_reg): /soc/bus@...00000: node has a unit name, but no reg or ranges property
> arch/riscv/boot/dts/canaan/k210.dtsi:352.22-406.5: Warning (simple_bus_reg): /soc/bus@...00000: missing or empty reg/ranges property
> 
> Add reg and ranges properties that naively cap the buses after the
> allocation of their last devices.
> 
> Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
> ---
>  arch/riscv/boot/dts/canaan/k210.dtsi | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/riscv/boot/dts/canaan/k210.dtsi b/arch/riscv/boot/dts/canaan/k210.dtsi
> index 948dc235e39d..6a34dc4f3e51 100644
> --- a/arch/riscv/boot/dts/canaan/k210.dtsi
> +++ b/arch/riscv/boot/dts/canaan/k210.dtsi
> @@ -163,7 +163,8 @@ apb0: bus@...00000 {
>  			#address-cells = <1>;
>  			#size-cells = <1>;
>  			compatible = "simple-pm-bus";
> -			ranges;
> +			regs = <0x50200000 0x200000>;
> +			ranges = <0x50200000 0x50200000 0x200000>;

This looks wrong.

The property is called "reg" not "regs".

And I don't think that you should provide "reg" at all,
simply supplying "ranges" should be sufficient, no?


Kind regards,
Niklas

>  			clocks = <&sysclk K210_CLK_APB0>;
>  
>  			gpio1: gpio@...00000 {
> @@ -382,7 +383,8 @@ apb1: bus@...00000 {
>  			#address-cells = <1>;
>  			#size-cells = <1>;
>  			compatible = "simple-pm-bus";
> -			ranges;
> +			regs = <0x50400000 0x40100>;
> +			ranges = <0x50400000 0x50400000 0x40100>;
>  			clocks = <&sysclk K210_CLK_APB1>;
>  
>  			wdt0: watchdog@...00000 {
> @@ -437,7 +439,8 @@ apb2: bus@...00000 {
>  			#address-cells = <1>;
>  			#size-cells = <1>;
>  			compatible = "simple-pm-bus";
> -			ranges;
> +			regs = <0x52000000 0x2000200>;
> +			ranges = <0x52000000 0x52000000 0x2000200>;
>  			clocks = <&sysclk K210_CLK_APB2>;
>  
>  			spi0: spi@...00000 {
> -- 
> 2.36.1
>