linux-kernel - Re: [PATCH 4/4] ARM: dts: pxa: use new 'dma-channels/requests' properties

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Message-ID: <edec6367-c2ca-a321-4683-1fcaeb15ba51@linaro.org>
Date:   Thu, 28 Apr 2022 09:35:07 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Vinod Koul <vkoul@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Lubomir Rintel <lkundrak@...sk>,
        Daniel Mack <daniel@...que.org>,
        Haojian Zhuang <haojian.zhuang@...il.com>,
        Robert Jarzmik <robert.jarzmik@...e.fr>,
        dmaengine@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 4/4] ARM: dts: pxa: use new 'dma-channels/requests'
 properties

On 27/04/2022 18:14, Krzysztof Kozlowski wrote:
> The '#dma-channels' and '#dma-requests' properties were deprecated in
> favor of these defined by generic dma-common DT bindings.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> ---
>  arch/arm/boot/dts/mmp2.dtsi   | 2 +-
>  arch/arm/boot/dts/pxa25x.dtsi | 4 ++--
>  arch/arm/boot/dts/pxa27x.dtsi | 4 ++--
>  arch/arm/boot/dts/pxa3xx.dtsi | 4 ++--
>  4 files changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/mmp2.dtsi b/arch/arm/boot/dts/mmp2.dtsi
> index 46984d4c5224..1a49b58e8048 100644
> --- a/arch/arm/boot/dts/mmp2.dtsi
> +++ b/arch/arm/boot/dts/mmp2.dtsi
> @@ -275,7 +275,7 @@ dma-controller@...00000 {
>  				compatible = "marvell,pdma-1.0";
>  				reg = <0xd4000000 0x10000>;
>  				interrupts = <48>;
> -				#dma-channels = <16>;
> +				dma-channels = <16>;

As Rob proposed, the removal of old property does not have to happen in
this patch (but much later). This would allow merging DTS change
immediately.

I will resend in that spirit, unless SoC maintainers prefer the original
approach (where DTS has to wait for next release)?


Best regards,
Krzysztof