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@xxxxxxxxxxxxx>
---
arch/arm/boot/dts/microchip/at91-sama5d2_icp.dts | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm/boot/dts/microchip/at91-sama5d2_icp.dts b/arch/arm/boot/dts/microchip/at91-sama5d2_icp.dts
index 999adeca6f33..adcb3240e5f5 100644
--- a/arch/arm/boot/dts/microchip/at91-sama5d2_icp.dts
+++ b/arch/arm/boot/dts/microchip/at91-sama5d2_icp.dts
@@ -712,6 +712,8 @@ &sdmmc0 {
bus-width = <4>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_sdmmc0_default>;
+ vmmc-supply = <&vdd_io_reg>; // 3.3V
+ vqmmc-supply = <&vdd_io_reg>; // 3.3V
status = "okay";
};
--
2.43.0
