linux-kernel - Re: [PATCH v2 00/30] phy: qcom,qmp: fix dt-bindings and deprecate lane suffix

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Date:   Thu, 14 Jul 2022 11:31:22 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Johan Hovold <johan@...nel.org>, Vinod Koul <vkoul@...nel.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 00/30] phy: qcom,qmp: fix dt-bindings and deprecate
 lane suffix

On 14/07/2022 10:12, Johan Hovold wrote:
> On Thu, Jul 07, 2022 at 03:46:55PM +0200, Johan Hovold wrote:
>> When adding support for SC8280XP to the QMP PHY driver I noticed that
>> the PHY provider child node was not described by the current DT schema.
>>
>> The SC8280XP PHYs also need a second fixed-divider PIPE clock
>> ("pipediv2") and I didn't want to have to add a bogus "lane" suffix to
>> the clock name just to match the current "pipe0" name so I decided to
>> deprecate the unnecessary suffix in the current binding instead.
>>
>> To be able to add the missing child-node schema and handle device
>> specifics like additional PIPE clocks, it quickly became obvious that
>> the binding needs to be split up.
>>
>> This series clean up and fixes some issue with the current schema before
>> splitting it up in separate schemas for PCIe, UFS and USB and adding
>> missing parts like the child PHY provider nodes.
>>
>> The MSM8996 PCIe PHY gets its own schema as this is the only non-combo
>> PHY that actually provides more than one PHY per IP block. Note that the
>> "lane" suffix is still unnecessary and misleading.
>>
>> The final patches add support for the updated binding to the (recently
>> split up) PHY drivers. Included is also a related combo PHY cleanup.
>>
>> Johan
>>
>>
>> Changes in v2
>>  - squash split + cleanup + example patches (Krzysztof)
>>  - deprecate clock-names instead of dropping suffix (Krzysztof)
>>  - deprecate reset-names instead of dropping suffix (Krzysztof)
>>  - flatten child reg if/then schemas (Krzysztof)
>>  - add back optional vddp-ref-clk to all bindings even though it likely
>>    only applies to MSM8996/98 UFS (Krzysztof)
>>  - add missing sc7180 schema to USB binding
>>  - misc clean ups
>>    - shorten or drop descriptions
>>    - drop quotes around $id and $schema (Krzysztof)
>>    - use maxItems with clock-output-names
>>    - combine two USB clock+reset schemas
>>  - add Reviewed-by/Acked-by tags
> 
> Any further comments to this series?
> 
> Vinod, I noticed there was a conflict when rebasing on linux-next due to
> commit 85d43a69db2d ("dt-bindings: phy: qcom,qmp: add IPQ8074 PCIe Gen3
> PHY binding").
> 

I got few comments. Apologies for a slow review, I am a bit overloaded.

Best regards,
Krzysztof