The sdmmc0 and sdmmc1 controllers are powered from 3.3V regulator.
Add vmmc-supply and vqmmc-supply properties to sdmmc nodes.
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-sama5d27_som1_ek.dts | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm/boot/dts/microchip/at91-sama5d27_som1_ek.dts b/arch/arm/boot/dts/microchip/at91-sama5d27_som1_ek.dts
index f3ffb8f01d8a..255ee0640133 100644
--- a/arch/arm/boot/dts/microchip/at91-sama5d27_som1_ek.dts
+++ b/arch/arm/boot/dts/microchip/at91-sama5d27_som1_ek.dts
@@ -56,6 +56,8 @@ sdmmc0: sdio-host@a0000000 {
bus-width = <8>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_sdmmc0_default>;
+ vmmc-supply = <&vddin_3v3>;
+ vqmmc-supply = <&vddin_3v3>;
status = "okay";
};
@@ -63,6 +65,8 @@ sdmmc1: sdio-host@b0000000 {
bus-width = <4>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_sdmmc1_default>;
+ vmmc-supply = <&vddin_3v3>;
+ vqmmc-supply = <&vddin_3v3>;
status = "okay";
};
--
2.43.0
