linux-kernel - Re: [PATCH] dt-bindings: pinctrl: st,stm32: fix phandle-array warning

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Message-ID: <169661501435.70432.16755877986670034633.robh@kernel.org>
Date:   Fri, 6 Oct 2023 12:56:54 -0500
From:   Rob Herring <robh@...nel.org>
To:     Martin Kaiser <martin@...ser.cx>
Cc:     Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        Conor Dooley <conor+dt@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Magnus Damm <magnus.damm@...il.com>,
        linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: Re: [PATCH] dt-bindings: pinctrl: st,stm32: fix phandle-array warning


On Fri, 06 Oct 2023 10:22:48 +0200, Martin Kaiser wrote:
> make CHECK_DTBS=y st/stm32f469-disco.dtb
> 
> brings up a warning about a missing argument:
> 
> stm32f469-disco.dtb: pinctrl@...20000: st,syscfg:0: [21, 8] is too short
> 
> The description of the third entry indicates that this entry is optional.
> The code in stm32_pctrl_dt_setup_irq parses st,syscfg and treats the third
> entry as optional. It defaults to 0xf if not present in the devicetree.
> 
> Update the schema to require at least two entries, use the same syntax as
> the description of renesas,ipmmu-main in
> Documentation/devicetree/bindings/iommu/renesas,ipmmu-vmsa.yaml.
> 
> Signed-off-by: Martin Kaiser <martin@...ser.cx>
> ---
> 
> I tested the following cases, all of them returned the expected result:
> 
>    st,syscfg = <&syscfg>;              (too short)
>    st,syscfg = <&syscfg 0x8>;          (ok)
>    st,syscfg = <&syscfg 0x8 0x0>;      (ok)
>    st,syscfg = <&syscfg 0x8 0x0 0x0>;  (too long)
> 
>  .../devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml          | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 

Acked-by: Rob Herring <robh@...nel.org>