From c329d479df14ec2f2078b39d0f66a477ae0afc3f Mon Sep 17 00:00:00 2001 From: Max Krummenacher Date: Wed, 16 Sep 2020 19:03:04 +0200 Subject: ARM64: dts: apalis-imx8qm: add comment for 2.5v for the ext rgmii signals Add a comment on how to switch the rail supplying the ext rgmii signals to 2.5V. Keep the rail at its default 3.3V though. Note that this requires a resent enough SCFW which provides this feature. Related-to: ELB-2942 Signed-off-by: Max Krummenacher --- arch/arm64/boot/dts/freescale/imx8qm-apalis-v1.1.dtsi | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/arm64/boot/dts/freescale/imx8qm-apalis-v1.1.dtsi') diff --git a/arch/arm64/boot/dts/freescale/imx8qm-apalis-v1.1.dtsi b/arch/arm64/boot/dts/freescale/imx8qm-apalis-v1.1.dtsi index ec29b9562c7b..57ea547dc2f2 100644 --- a/arch/arm64/boot/dts/freescale/imx8qm-apalis-v1.1.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8qm-apalis-v1.1.dtsi @@ -83,6 +83,9 @@ * * IMX_SC_R_BOARD_R1 for 3.3V * IMX_SC_R_BOARD_R2 for 1.8V + * IMX_SC_R_BOARD_R3 for 2.5V + * Note that for 2.5V operation the pad muxing needs to be changed, + * compare with PSW_OVR field of IMX8QM_COMP_CTL_GPIO_1V8_3V3_ENET_ENETA_PAD. * * those power domains are mutually exclusive. */ -- cgit v1.2.3