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

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Message-ID: <0180241f-4f10-f914-1288-371106c4fa1c@linaro.org>
Date:   Thu, 29 Dec 2022 09:06:10 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Luca Weiss <luca.weiss@...rphone.com>,
        ~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 28/12/2022 16:24, Luca Weiss wrote:
> 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.

top-level cannot have only minItems:1.

> 
> 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.

Use the syntax like:
https://elixir.bootlin.com/linux/v5.19-rc6/source/Documentation/devicetree/bindings/clock/samsung,exynos7-clock.yaml#L57


Best regards,
Krzysztof