Hi On 1/29/24 12:46, Uwe Kleine-König wrote:
From: Leonard Göhrs <l.goehrs@xxxxxxxxxxxxxx> This results in an improvement of EMI performance by reducing the 125MHz emission and its harmonics caused by the RGMII clock line. Signed-off-by: Leonard Göhrs <l.goehrs@xxxxxxxxxxxxxx> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx> --- arch/arm/boot/dts/st/stm32mp15xc-lxa-tac.dtsi | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm/boot/dts/st/stm32mp15xc-lxa-tac.dtsi b/arch/arm/boot/dts/st/stm32mp15xc-lxa-tac.dtsi index 7e835a7cf64a..cfaf8adde319 100644 --- a/arch/arm/boot/dts/st/stm32mp15xc-lxa-tac.dtsi +++ b/arch/arm/boot/dts/st/stm32mp15xc-lxa-tac.dtsi @@ -471,6 +471,10 @@ switch: switch@0 { interrupt-parent = <&gpioa>; interrupts = <6 IRQ_TYPE_EDGE_RISING>;+ /* Reduce RGMII EMI emissions by reducing drive strength */+ microchip,hi-drive-strength-microamp = <2000>; + microchip,lo-drive-strength-microamp = <8000>; + ports { #address-cells = <1>; #size-cells = <0>;
Applied on stm32-next. Thanks Alex
