From c21c23a0f2e9869676eff0d53fb89e151e14c873 Mon Sep 17 00:00:00 2001 From: Cristian Birsan Date: Tue, 19 Nov 2024 18:01:06 +0200 Subject: [PATCH] ARM: dts: microchip: sama5d29_curiosity: Add no-1-8-v property to sdmmc0 node Add no-1-8-v property to sdmmc0 node to keep VDDSDMMC power rail at 3.3V. This property will stop the LDO regulator from switching to 1.8V when the MMC core detects an UHS SD Card. VDDSDMMC power rail is used by all the SDMMC interface pins in GPIO mode (PA0 - PA13). On this board, PA6 is used as GPIO to enable the power switch controlling USB Vbus for the USB Host. The change is needed to fix the PA6 voltage level to 3.3V instead of 1.8V. Fixes: d85c4229e925 ("ARM: dts: at91: sama5d29_curiosity: Add device tree for sama5d29_curiosity board") Suggested-by: Mihai Sain Signed-off-by: Cristian Birsan Tested-by: Andrei Simion Link: https://lore.kernel.org/r/20241119160107.598411-2-cristian.birsan@microchip.com Signed-off-by: Claudiu Beznea --- arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts b/arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts index b6684bf67d3e6..7be2157815497 100644 --- a/arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts +++ b/arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts @@ -514,6 +514,7 @@ &sdmmc0 { bus-width = <4>; + no-1-8-v; pinctrl-names = "default"; pinctrl-0 = <&pinctrl_sdmmc0_default>; disable-wp; -- 2.39.5