linux-kernel - Re: [PATCH v4 1/3] dt-bindings: pwm: Add Xilinx AXI Timer

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Date:   Tue, 1 Jun 2021 12:47:07 -0400
From:   Sean Anderson <sean.anderson@...o.com>
To:     Rob Herring <robh@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        Alvaro Gamez <alvaro.gamez@...ent.com>,
        devicetree@...r.kernel.org, linux-pwm@...r.kernel.org,
        michal.simek@...inx.com, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 1/3] dt-bindings: pwm: Add Xilinx AXI Timer



On 6/1/21 9:32 AM, Rob Herring wrote:
 > On Fri, 28 May 2021 17:45:20 -0400, Sean Anderson wrote:
 >> This adds a binding for the Xilinx LogiCORE IP AXI Timer. This device is
 >> a "soft" block, so it has many parameters which would not be
 >> configurable in most hardware. This binding is usually automatically
 >> generated by Xilinx's tools, so the names and values of some properties
 >> must be kept as they are. Replacement properties have been provided for
 >> new device trees.
 >>
 >> Because we need to init timer devices so early in boot, the easiest way
 >> to configure things is to use a device tree property. For the moment
 >> this is 'xlnx,pwm', but this could be extended/renamed/etc. in the
 >> future if these is a need for a generic property.
 >>
 >> Signed-off-by: Sean Anderson <sean.anderson@...o.com>
 >> ---
 >>
 >> Changes in v4:
 >> - Remove references to generate polarity so this can get merged
 >> - Predicate PWM driver on the presence of #pwm-cells
 >> - Make some properties optional for clocksource drivers
 >>
 >> Changes in v3:
 >> - Mark all boolean-as-int properties as deprecated
 >> - Add xlnx,pwm and xlnx,gen?-active-low properties.
 >> - Make newer replacement properties mutually-exclusive with what they
 >>    replace
 >> - Add an example with non-deprecated properties only.
 >>
 >> Changes in v2:
 >> - Use 32-bit addresses for example binding
 >>
 >>   .../bindings/pwm/xlnx,axi-timer.yaml          | 85 +++++++++++++++++++
 >>   1 file changed, 85 insertions(+)
 >>   create mode 100644 Documentation/devicetree/bindings/pwm/xlnx,axi-timer.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:
 > ./Documentation/devicetree/bindings/pwm/xlnx,axi-timer.yaml:16:10: [warning] wrong indentation: expected 10 but found 9 (indentation)
 > ./Documentation/devicetree/bindings/pwm/xlnx,axi-timer.yaml:19:10: [warning] wrong indentation: expected 10 but found 9 (indentation)
 >
 > dtschema/dtc warnings/errors:
 >
 > See https://patchwork.ozlabs.org/patch/1485318
 >
 > 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:

I needed yamllint installed to get these errors. Is this requirement
documented anywhere? I don't see it in [1].

--Sean

[1] https://www.kernel.org/doc/html/latest/devicetree/bindings/writing-schema.html#testing

 >
 > pip3 install dtschema --upgrade
 >
 > Please check and re-submit.
 >