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

Marek Vasut marex at nabladev.com
Sat Apr 11 06:03:24 PDT 2026


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>;
-- 
2.53.0




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