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[1/2] ARM: dts: microchip: sama5d29_curiosity: Add no-1-8-v property to sdmmc0 node

Message ID 20241119160107.598411-2-cristian.birsan@microchip.com (mailing list archive)
State New
Headers show
Series ARM: dts: microchip: Add no-1-8-v property to sdmmc0 node | expand

Commit Message

Cristian Birsan Nov. 19, 2024, 4:01 p.m. UTC 
From: Cristian Birsan <cristian.birsan@microchip.com>

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 <mihai.sain@microchip.com>
Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
---
 arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts b/arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts
index 951a0c97d3c6..5933840bb8f7 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 @@  kernel@200000 {
 
 &sdmmc0 {
 	bus-width = <4>;
+	no-1-8-v;
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_sdmmc0_default>;
 	disable-wp;