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Subject[PATCH v2 5/8] ARM: dts: microchip: sama5d27_wlsom1_ek: Add power-supply property for sdmmc0 node
Date
The sdmmc0 controller is powered from 3.3V regulator.
Add vmmc-supply and vqmmc-supply properties to sdmmc0 node.
The sdmmc controller from SAMA5D2 MPU has support for IO voltage signaling/switching required by the UHS sd-card.
In order to avoid the issues from the tuning procedure required by the UHS cards,
keep the vqmmc at 3V3 to use the sd high-speed mode.

Signed-off-by: Mihai Sain <mihai.sain@microchip.com>
---
arch/arm/boot/dts/microchip/at91-sama5d27_wlsom1_ek.dts | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/microchip/at91-sama5d27_wlsom1_ek.dts b/arch/arm/boot/dts/microchip/at91-sama5d27_wlsom1_ek.dts
index 15239834d886..7b36e1970bb7 100644
--- a/arch/arm/boot/dts/microchip/at91-sama5d27_wlsom1_ek.dts
+++ b/arch/arm/boot/dts/microchip/at91-sama5d27_wlsom1_ek.dts
@@ -199,6 +199,8 @@ &sdmmc0 {
bus-width = <4>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_sdmmc0_default>;
+ vmmc-supply = <&vdd_3v3>;
+ vqmmc-supply = <&vdd_3v3>;
status = "okay";
};

--
2.43.0

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