linux-kernel - Re: [PATCH v2 4/6] ARM: dts: am33xx: use new 'dma-channels/requests' properties

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Message-ID: <YmpCn+g7oN+1HWSY@atomide.com>
Date:   Thu, 28 Apr 2022 10:30:39 +0300
From:   Tony Lindgren <tony@...mide.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Rob Herring <robh@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Benoît Cousson <bcousson@...libre.com>,
        Sekhar Nori <nsekhar@...com>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Vinod Koul <vkoul@...nel.org>, linux-usb@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        dmaengine@...r.kernel.org
Subject: Re: [PATCH v2 4/6] ARM: dts: am33xx: use new 'dma-channels/requests'
 properties

* Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org> [220427 19:23]:
> On Wed, 27 Apr 2022 at 20:20, Rob Herring <robh@...nel.org> wrote:
> > > diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
> > > index f6ec85d58dd1..55ffb0813ded 100644
> > > --- a/arch/arm/boot/dts/am33xx.dtsi
> > > +++ b/arch/arm/boot/dts/am33xx.dtsi
> > > @@ -461,8 +461,8 @@ cppi41dma: dma-controller@...0 {
> > >                               interrupts = <17>;
> > >                               interrupt-names = "glue";
> > >                               #dma-cells = <2>;
> > > -                             #dma-channels = <30>;
> > > -                             #dma-requests = <256>;
> > > +                             dma-channels = <30>;
> > > +                             dma-requests = <256>;
> >
> > You could keep the old properties for compatibility and to apply
> > immediately.
> 
> Indeed, that's a nice solution. Any preference from TI SoC maintainers?

Makes sense to me to avoid dependencies.

Regards,

Tony