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| author | Leonard Göhrs <l.goehrs@pengutronix.de> | 2024-01-29 12:46:49 +0100 |
|---|---|---|
| committer | Alexandre Torgue <alexandre.torgue@foss.st.com> | 2024-02-14 12:09:41 +0100 |
| commit | 7fd195f01ae52871b04b752447f865e1a6661487 (patch) | |
| tree | 07e5b8a7d873760269d00aef15bf0eff5f79bbb4 /arch/arm | |
| parent | bda732fda19365b7a7397d0d37090f6dc253232c (diff) | |
| download | linux-stable-7fd195f01ae52871b04b752447f865e1a6661487.tar.gz linux-stable-7fd195f01ae52871b04b752447f865e1a6661487.tar.bz2 linux-stable-7fd195f01ae52871b04b752447f865e1a6661487.zip | |
ARM: dts: stm32: lxa-tac: reduce RGMII interface drive strength
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@pengutronix.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/boot/dts/st/stm32mp15xc-lxa-tac.dtsi | 4 |
1 files changed, 4 insertions, 0 deletions
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 @@ baseboard_eeprom: &sip_eeprom { 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>; |