Re: [PATCH] arm64: dts: st: fix arm,smc-id of the SMC watchdog on stm32mp2

[Alexandre TORGUE <alexandre.torgue@foss.st.com>]

Hi Mateusz

On 9/7/26 11:14, Mateusz Nowicki wrote:
> OP-TEE implements the STM32MP2 watchdog SMC service with function ID
> 0xbc000000 (CFG_WDT_SM_HANDLER_ID), not 0xb200005a. With the current
> value the arm_smc_wdt probe fails with -EIO and the IWDG started by the
> bootloader is never refreshed.
> 
> Fixes: 89fca38168c9 ("arm64: dts: st: add arm-wdt node for watchdog support on stm32mp251")
> Fixes: e9b03ef21386 ("arm64: dts: st: introduce stm32mp23 SoCs family")
> Signed-off-by: Mateusz Nowicki <mateusz.nowicki@posteo.net>
> ---
>   arch/arm64/boot/dts/st/stm32mp231.dtsi | 2 +-
>   arch/arm64/boot/dts/st/stm32mp251.dtsi | 2 +-
>   2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/st/stm32mp231.dtsi b/arch/arm64/boot/dts/st/stm32mp231.dtsi
> index 9e1d240888ff..35e247af957c 100644
> --- a/arch/arm64/boot/dts/st/stm32mp231.dtsi
> +++ b/arch/arm64/boot/dts/st/stm32mp231.dtsi
> @@ -35,7 +35,7 @@ arm-pmu {
>   
>   	arm_wdt: watchdog {
>   		compatible = "arm,smc-wdt";
> -		arm,smc-id = <0xb200005a>;
> +		arm,smc-id = <0xbc000000>;
>   		status = "disabled";
>   	};
>   
> diff --git a/arch/arm64/boot/dts/st/stm32mp251.dtsi b/arch/arm64/boot/dts/st/stm32mp251.dtsi
> index 9c63fdb5a885..2dcbba65e298 100644
> --- a/arch/arm64/boot/dts/st/stm32mp251.dtsi
> +++ b/arch/arm64/boot/dts/st/stm32mp251.dtsi
> @@ -36,7 +36,7 @@ arm-pmu {
>   
>   	arm_wdt: watchdog {
>   		compatible = "arm,smc-wdt";
> -		arm,smc-id = <0xb200005a>;
> +		arm,smc-id = <0xbc000000>;
>   		status = "disabled";
>   	};
>   

Applied on stm32-next.

Thanks
Alex