linux-kernel - Re: [PATCH 7/8] arm64: dts: qcom: sm8450: remove invalid reg-names from ufs node

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Message-Id: <CREFOMX7DAPN.2NR3VSFCX9K10@otso>
Date:   Fri, 24 Mar 2023 08:26:50 +0100
From:   "Luca Weiss" <luca.weiss@...rphone.com>
To:     "Eric Biggers" <ebiggers@...nel.org>,
        "Neil Armstrong" <neil.armstrong@...aro.org>
Cc:     "Krzysztof Kozlowski" <krzysztof.kozlowski@...aro.org>,
        "Rob Clark" <robdclark@...il.com>,
        "Abhinav Kumar" <quic_abhinavk@...cinc.com>,
        "Dmitry Baryshkov" <dmitry.baryshkov@...aro.org>,
        "Sean Paul" <sean@...rly.run>, "David Airlie" <airlied@...il.com>,
        "Daniel Vetter" <daniel@...ll.ch>,
        "Rob Herring" <robh+dt@...nel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
        "Andy Gross" <agross@...nel.org>,
        "Bjorn Andersson" <andersson@...nel.org>,
        "Konrad Dybcio" <konrad.dybcio@...aro.org>,
        "Lee Jones" <lee@...nel.org>, "Stephen Boyd" <sboyd@...nel.org>,
        "Manivannan Sadhasivam" <mani@...nel.org>,
        "Alim Akhtar" <alim.akhtar@...sung.com>,
        "Avri Altman" <avri.altman@....com>,
        "Bart Van Assche" <bvanassche@....org>,
        <linux-arm-msm@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, "Rob Herring" <robh@...nel.org>,
        "Krzysztof Kozlowski" <krzk@...nel.org>,
        <linux-scsi@...r.kernel.org>
Subject: Re: [PATCH 7/8] arm64: dts: qcom: sm8450: remove invalid reg-names
 from ufs node

Hi Eric,

On Fri Mar 24, 2023 at 7:52 AM CET, Eric Biggers wrote:
> Hi Neil,
>
> On Thu, Mar 23, 2023 at 02:10:44PM +0100, Neil Armstrong wrote:
> > Hi,
> > 
> > On 23/03/2023 11:49, Krzysztof Kozlowski wrote:
> > > On 23/03/2023 11:25, Neil Armstrong wrote:
> > > > Fixes the following DT bindings check error:
> > > > ufshc@...4000: Unevaluated properties are not allowed ('reg-names' was unexpected)
> > > > 
> > > > Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
> > > > ---
> > > >   arch/arm64/boot/dts/qcom/sm8450.dtsi | 1 -
> > > >   1 file changed, 1 deletion(-)
> > > > 
> > > > diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> > > > index ef9bae2e6acc..8ecc48c7c5ef 100644
> > > > --- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
> > > > +++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> > > > @@ -3996,7 +3996,6 @@ ufs_mem_hc: ufshc@...4000 {
> > > >   				     "jedec,ufs-2.0";
> > > >   			reg = <0 0x01d84000 0 0x3000>,
> > > >   			      <0 0x01d88000 0 0x8000>;
> > > > -			reg-names = "std", "ice";
> > > 
> > > This is also part of:
> > > https://lore.kernel.org/linux-arm-msm/20230308155838.1094920-8-abel.vesa@linaro.org/#Z31arch:arm64:boot:dts:qcom:sm8450.dtsi
> > > but I actually wonder whether you just missed some binding patch?
> > 
> > I'm aware of Abel's RFC patchset to support shared ICE, but this is a cleanup of the current DT,
> > and the current bindings schema doesn't document reg-names.
> > 
>
> The ufs-qcom driver accesses the "ice" registers by name, so the reg-names can't
> be removed from the device tree.  A few months ago there was a patch to fix the
> device tree schema for qcom,ufs to include the reg-names.  It looks like that
> patch got missed, though:
> https://lore.kernel.org/r/20221209-dt-binding-ufs-v2-2-dc7a04699579@fairphone.com

Are you implying that I should resend the patch or something? Not sure
who to bug about applying this patch.

Regards
Luca

>
> - Eric