On Sat, Nov 19, 2022 at 6:24 PM Fabio Estevam <festevam@xxxxxxxxx> wrote:
>
> From: Fabio Estevam <festevam@xxxxxxx>
>
> The following build warning is seen when running:
> make dtbs_check DT_SCHEMA_FILES=fsl-imx-uart.yaml
>
> arch/arm/boot/dts/imx6dl-gw560x.dtb: serial@2020000: rts-gpios: False schema does not allow [[20, 1, 0]]
> From schema: Documentation/devicetree/bindings/serial/fsl-imx-uart.yaml
>
> The imx6qdl-gw560x board does not expose the UART RTS and CTS
> as native pins, so 'uart-has-rtscts' should not be used.
>
> Fix the problem by removing the 'uart-has-rtscts' property.
>
> Fixes: b8a559feffb2 ("ARM: dts: imx: add Gateworks Ventana GW5600 support")
> Signed-off-by: Fabio Estevam <festevam@xxxxxxx>
> ---
> Hi,
>
> My understanding is that uart-has-rtscts indicates that the UART RTS
> and CTS pins are used natively and we cannot use uart-has-rtscts with
> rts-gpios.
>
> If this is correct, then I can also submit a patch fixing the arm64 Gateworks
> boards too.
Looking at serial.yaml:
if:
required:
- uart-has-rtscts
then:
properties:
cts-gpios: false
rts-gpios: false
So I think my proposed change is correct.
