linux-kernel - Re: [PATCH] dt-bindings: ufs: qcom: Add reg-names property for ICE

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Date:   Wed, 28 Dec 2022 16:24:32 +0100
From:   "Luca Weiss" <luca.weiss@...rphone.com>
To:     "Krzysztof Kozlowski" <krzysztof.kozlowski@...aro.org>,
        <~postmarketos/upstreaming@...ts.sr.ht>,
        <phone-devel@...r.kernel.org>, "Andy Gross" <agross@...nel.org>,
        "Bjorn Andersson" <andersson@...nel.org>,
        "Konrad Dybcio" <konrad.dybcio@...aro.org>,
        "Alim Akhtar" <alim.akhtar@...sung.com>,
        "Avri Altman" <avri.altman@....com>,
        "Bart Van Assche" <bvanassche@....org>,
        "Rob Herring" <robh+dt@...nel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>
Cc:     <linux-arm-msm@...r.kernel.org>, <linux-scsi@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] dt-bindings: ufs: qcom: Add reg-names property for ICE

On Wed Dec 28, 2022 at 12:58 PM CET, Krzysztof Kozlowski wrote:
> On 28/12/2022 12:53, Luca Weiss wrote:
> > Hi Krzysztof,
> > 
> > On Wed Dec 28, 2022 at 12:50 PM CET, Krzysztof Kozlowski wrote:
> >> On 09/12/2022 15:29, Luca Weiss wrote:
> >>> The code in ufs-qcom-ice.c needs the ICE reg to be named "ice". Add this
> >>> in the bindings so the existing dts can validate successfully.
> >>>
> >>> Also sm8450 is using ICE since commit 276ee34a40c1 ("arm64: dts: qcom:
> >>> sm8450: add Inline Crypto Engine registers and clock") so move the
> >>> compatible to the correct if.
> >>>
> >>> Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
> >>> ---
> >>> (no cover subject)
> >>>
> >>> The only remaining validation issues I see is the following on sc8280xp-crd.dtb
> >>> and sa8540p-ride.dtb:
> >>>
> >>
> >> Any plans on fixing the patch (after testing it) and resending?
> > 
> > I wasn't quite sure how to fix the comments, but re-reading them this
> > comment from you is how you expect it to be in v2?
>
> The patch fails testing, so I meant this.
>
> > 
> >> Just add it to top-level with minItems: 1 and per variant customize:
> >> 1. maxItems: 1
> >> 2. minItems: 2 + required
> > 

I tried a bit now but couldn't get it to work when using 'items' so that
we have the "std" and "ice" names in there.

Documentation/devicetree/bindings/ufs/qcom,ufs.yaml: allOf:2:then:properties:reg-names: 'oneOf' conditional failed, one must be fixed:
        [{'const': 'std'}, {'const': 'ice'}] is too long
        [{'const': 'std'}, {'const': 'ice'}] is too short
        False schema does not allow 2
        1 was expected
        hint: "minItems" is only needed if less than the "items" list length
        from schema $id: http://devicetree.org/meta-schemas/items.yaml#

Since I have 'minItems: 1' in top-level I seemingly cannot use 'items'
in the 'if' neither alone nor with 'minItems' and/or 'maxItems', getting
different errors when doing that.

Can I just put 'reg-names: true' top-level and then specify either items
for the ones that use ICE or for the others use the 'maxItems: 1'?

Or am I supposed to ignore 'items' completely but driver expects 'ice'
name so I'd rather include it.

Regards
Luca

>
> Yes.
>
> Best regards,
> Krzysztof