[PATCH] ARM: dts: stm32: Enable PHY SSC on DH STM32MP13xx DHCOR DHSBC board

Alexandre TORGUE alexandre.torgue at foss.st.com
Tue May 19 02:35:02 PDT 2026


Hi Marek

On 4/11/26 15:03, Marek Vasut wrote:
> Add realtek,rxc-ssc-enable and realtek,sysclk-ssc-enable to both PHY
> DT nodes to enable PHY Spread Spectrum on RXC and SYSCLK, CLKOUT is
> disabled and therefore does not need SSC enabled.
> 
> Signed-off-by: Marek Vasut <marex at nabladev.com>
> ---
> Cc: Alexandre Torgue <alexandre.torgue at foss.st.com>
> Cc: Christoph Niedermaier <cniedermaier at dh-electronics.com>
> Cc: Conor Dooley <conor+dt at kernel.org>
> Cc: Krzysztof Kozlowski <krzk+dt at kernel.org>
> Cc: Maxime Coquelin <mcoquelin.stm32 at gmail.com>
> Cc: Rob Herring <robh at kernel.org>
> Cc: devicetree at vger.kernel.org
> Cc: kernel at dh-electronics.com
> Cc: linux-arm-kernel at lists.infradead.org
> Cc: linux-kernel at vger.kernel.org
> Cc: linux-stm32 at st-md-mailman.stormreply.com
> ---
>   arch/arm/boot/dts/st/stm32mp135f-dhcor-dhsbc.dts | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/st/stm32mp135f-dhcor-dhsbc.dts b/arch/arm/boot/dts/st/stm32mp135f-dhcor-dhsbc.dts
> index 9902849ed0406..70d85af467353 100644
> --- a/arch/arm/boot/dts/st/stm32mp135f-dhcor-dhsbc.dts
> +++ b/arch/arm/boot/dts/st/stm32mp135f-dhcor-dhsbc.dts
> @@ -97,6 +97,8 @@ ethphy1: ethernet-phy at 1 {
>   			interrupts = <12 IRQ_TYPE_LEVEL_LOW>;
>   			reg = <1>;
>   			realtek,clkout-disable;
> +			realtek,rxc-ssc-enable;
> +			realtek,sysclk-ssc-enable;
>   			reset-assert-us = <15000>;
>   			reset-deassert-us = <55000>;
>   			reset-gpios = <&gpioa 11 GPIO_ACTIVE_LOW>;
> @@ -146,6 +148,8 @@ ethphy2: ethernet-phy at 1 {
>   			interrupts = <15 IRQ_TYPE_LEVEL_LOW>;
>   			reg = <1>;
>   			realtek,clkout-disable;
> +			realtek,rxc-ssc-enable;
> +			realtek,sysclk-ssc-enable;
>   			reset-assert-us = <15000>;
>   			reset-deassert-us = <55000>;
>   			reset-gpios = <&gpiog 8 GPIO_ACTIVE_LOW>;

Applied on stm32-next.

Thanks
Alex



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