[PATCH] arm64: zynqmp: dts: Add rts delay property for rs485 mode on KD240

[Michal Simek]

On 7/18/24 12:15, Michal Simek wrote:
> From: Manikanta Guntupalli <manikanta.guntupalli at amd.com>
> 
> Add "rs485-rts-delay" property to uartps node with delay_rts_before_send
> and delay_rts_after_send values as 10ms for rs485 mode on KD240.
> 
> 10ms rts delay values have been chosen based on testing with rs485
> temperature sensor (which is part of the kit) as safe minimum value
> for reliable operation at a baud rate of 9600.
> 
> Signed-off-by: Manikanta Guntupalli <manikanta.guntupalli at amd.com>
> Signed-off-by: Michal Simek <michal.simek at amd.com>
> ---
> 
>   arch/arm/dts/zynqmp-sck-kd-g-revA.dtso | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm/dts/zynqmp-sck-kd-g-revA.dtso b/arch/arm/dts/zynqmp-sck-kd-g-revA.dtso
> index 1727a1cc15c1..4de29d5d3ff6 100644
> --- a/arch/arm/dts/zynqmp-sck-kd-g-revA.dtso
> +++ b/arch/arm/dts/zynqmp-sck-kd-g-revA.dtso
> @@ -358,6 +358,7 @@
>   	status = "okay";
>   	rts-gpios = <&gpio 72 GPIO_ACTIVE_HIGH>;
>   	linux,rs485-enabled-at-boot-time;
> +	rs485-rts-delay = <10 10>;
>   	pinctrl-names = "default";
>   	pinctrl-0 = <&pinctrl_uart0_default>;
>   	assigned-clock-rates = <100000000>;

applied.
M