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

[Rob Herring]

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 at 40020000: 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 at kaiser.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 at kernel.org>