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Date:   Thu, 23 Mar 2023 23:52:47 -0700
From:   Eric Biggers <ebiggers@kernel.org>
To:     Neil Armstrong <neil.armstrong@linaro.org>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        Rob Clark <robdclark@gmail.com>,
        Abhinav Kumar <quic_abhinavk@quicinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
        Sean Paul <sean@poorly.run>, David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Andy Gross <agross@kernel.org>,
        Bjorn Andersson <andersson@kernel.org>,
        Konrad Dybcio <konrad.dybcio@linaro.org>,
        Lee Jones <lee@kernel.org>, Stephen Boyd <sboyd@kernel.org>,
        Manivannan Sadhasivam <mani@kernel.org>,
        Alim Akhtar <alim.akhtar@samsung.com>,
        Avri Altman <avri.altman@wdc.com>,
        Bart Van Assche <bvanassche@acm.org>,
        linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
        freedreno@lists.freedesktop.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, Rob Herring <robh@kernel.org>,
        Krzysztof Kozlowski <krzk@kernel.org>,
        linux-scsi@vger.kernel.org, Luca Weiss <luca.weiss@fairphone.com>
Subject: Re: [PATCH 7/8] arm64: dts: qcom: sm8450: remove invalid reg-names
 from ufs node
Message-ID: <20230324065247.GA9598@sol.localdomain>
References: <20230323-topic-sm8450-upstream-dt-bindings-fixes-v1-0-3ead1e418fe4@linaro.org>
 <20230323-topic-sm8450-upstream-dt-bindings-fixes-v1-7-3ead1e418fe4@linaro.org>
 <9614782e-0d78-e8f2-a438-452cfa86f80b@linaro.org>
 <316d7d7d-b370-36e1-648a-400447d2dd47@linaro.org>
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In-Reply-To: <316d7d7d-b370-36e1-648a-400447d2dd47@linaro.org>
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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@1d84000: Unevaluated properties are not allowed ('reg-names' was unexpected)
> > > 
> > > Signed-off-by: Neil Armstrong <neil.armstrong@linaro.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@1d84000 {
> > >   				     "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

- Eric