linux-kernel - Re: [PATCH net-next v2 01/35] dt-bindings: phy: Add QorIQ SerDes binding

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Date:   Tue, 28 Jun 2022 20:09:39 -0600
From:   Rob Herring <robh@...nel.org>
To:     Sean Anderson <sean.anderson@...o.com>
Cc:     devicetree@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>,
        Vinod Koul <vkoul@...nel.org>, linux-phy@...ts.infradead.org,
        Jakub Kicinski <kuba@...nel.org>,
        "David S . Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Russell King <linux@...linux.org.uk>,
        linux-kernel@...r.kernel.org, Paolo Abeni <pabeni@...hat.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Madalin Bucur <madalin.bucur@....com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH net-next v2 01/35] dt-bindings: phy: Add QorIQ SerDes binding

On Tue, 28 Jun 2022 18:13:30 -0400, Sean Anderson wrote:
> This adds a binding for the SerDes module found on QorIQ processors. The
> phy reference has two cells, one for the first lane and one for the
> last. This should allow for good support of multi-lane protocols when
> (if) they are added. There is no protocol option, because the driver is
> designed to be able to completely reconfigure lanes at runtime.
> Generally, the phy consumer can select the appropriate protocol using
> set_mode. For the most part there is only one protocol controller
> (consumer) per lane/protocol combination. The exception to this is the
> B4860 processor, which has some lanes which can be connected to
> multiple MACs. For that processor, I anticipate the easiest way to
> resolve this will be to add an additional cell with a "protocol
> controller instance" property.
> 
> Each serdes has a unique set of supported protocols (and lanes). The
> support matrix is stored in the driver and is selected based on the
> compatible string. It is anticipated that a new compatible string will
> need to be added for each serdes on each SoC that drivers support is
> added for. There is no "generic" compatible string for this reason.
> 
> There are two PLLs, each of which can be used as the master clock for
> each lane. Each PLL has its own reference. For the moment they are
> required, because it simplifies the driver implementation. Absent
> reference clocks can be modeled by a fixed-clock with a rate of 0.
> 
> Signed-off-by: Sean Anderson <sean.anderson@...o.com>
> ---
> 
> Changes in v2:
> - Add #clock-cells. This will allow using assigned-clocks* to configure
>   the PLLs.
> - Allow a value of 1 for phy-cells. This allows for compatibility with
>   the similar (but according to Ioana Ciornei different enough) lynx-28g
>   binding.
> - Document phy cells in the description
> - Document the structure of the compatible strings
> - Fix example binding having too many cells in regs
> - Move compatible first
> - Refer to the device in the documentation, rather than the binding
> - Remove minItems
> - Rename to fsl,lynx-10g.yaml
> - Use list for clock-names
> 
>  .../devicetree/bindings/phy/fsl,lynx-10g.yaml | 93 +++++++++++++++++++
>  1 file changed, 93 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/fsl,lynx-10g.yaml
> 

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml: patternProperties:^thermistor@:properties:adi,excitation-current-nanoamp: '$ref' should not be valid under {'const': '$ref'}
	hint: Standard unit suffix properties don't need a type $ref
	from schema $id: http://devicetree.org/meta-schemas/core.yaml#
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml: ignoring, error in schema: patternProperties: ^thermistor@: properties: adi,excitation-current-nanoamp
Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.example.dtb:0:0: /example-0/spi/ltc2983@0: failed to match any schema with compatible: ['adi,ltc2983']

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/patch/

This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit.