linux-kernel - Re: [PATCH 1/2] regulator: dt-bindings: Add Allwinner D1 LDOs

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Date:   Mon, 01 Aug 2022 07:43:53 -0600
From:   Rob Herring <robh@...nel.org>
To:     Samuel Holland <samuel@...lland.org>
Cc:     devicetree@...r.kernel.org, Mark Brown <broonie@...nel.org>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        linux-sunxi@...ts.linux.dev,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>
Subject: Re: [PATCH 1/2] regulator: dt-bindings: Add Allwinner D1 LDOs

On Sun, 31 Jul 2022 23:47:57 -0500, Samuel Holland wrote:
> The Allwinner D1 SoC contains two pairs of in-package LDOs. One pair is
> for general purpose use. LDOA generally powers the board's 1.8 V rail.
> LDOB generally powers the in-package DRAM, where applicable.
> 
> The other pair of LDOs powers the analog power domains inside the SoC,
> including the audio codec, thermal sensor, and ADCs. These LDOs require
> a 0.9 V bandgap voltage reference. The calibration value for the voltage
> reference is stored in an eFuse, accessed via an NVMEM cell.
> 
> Neither LDO control register is in its own MMIO range; instead, each
> regulator device relies on a syscon exported by some "host" device node.
> Getting the register via a syscon avoids a dependency on the subsystem/
> driver for that host device (e.g. a functioning thermal sensor should
> not depend on having the audio codec driver loaded).
> 
> Signed-off-by: Samuel Holland <samuel@...lland.org>
> ---
> 
>  .../allwinner,sun20i-d1-analog-ldos.yaml      | 77 +++++++++++++++++++
>  .../allwinner,sun20i-d1-system-ldos.yaml      | 55 +++++++++++++
>  2 files changed, 132 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/regulator/allwinner,sun20i-d1-analog-ldos.yaml
>  create mode 100644 Documentation/devicetree/bindings/regulator/allwinner,sun20i-d1-system-ldos.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:
Error: Documentation/devicetree/bindings/regulator/allwinner,sun20i-d1-analog-ldos.example.dts:24.27-28 syntax error
FATAL ERROR: Unable to parse input tree
make[1]: *** [scripts/Makefile.lib:383: Documentation/devicetree/bindings/regulator/allwinner,sun20i-d1-analog-ldos.example.dtb] Error 1
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:1404: dt_binding_check] Error 2

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.