| Message ID | 20240206120322.88907-9-mihai.sain@microchip.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add power-supply properties for sdmmc nodes on Microchip boards | expand |
On 06.02.2024 14:03, Mihai Sain wrote: > The sdmmc0 controller is powered from 3.3V regulator. Same here according to https://ww1.microchip.com/downloads/en/DeviceDoc/SAMA5D2C-XULT-User%27s-Guide-50002691E.pdf > 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-sama5d2_xplained.dts | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/arm/boot/dts/microchip/at91-sama5d2_xplained.dts b/arch/arm/boot/dts/microchip/at91-sama5d2_xplained.dts > index 6680031387e8..9b7e56790a5a 100644 > --- a/arch/arm/boot/dts/microchip/at91-sama5d2_xplained.dts > +++ b/arch/arm/boot/dts/microchip/at91-sama5d2_xplained.dts > @@ -67,6 +67,8 @@ sdmmc0: sdio-host@a0000000 { > pinctrl-0 = <&pinctrl_sdmmc0_default>; > non-removable; > mmc-ddr-3_3v; > + vmmc-supply = <&vdd_3v3_reg>; > + vqmmc-supply = <&vdd_3v3_reg>; > status = "okay"; > }; >
diff --git a/arch/arm/boot/dts/microchip/at91-sama5d2_xplained.dts b/arch/arm/boot/dts/microchip/at91-sama5d2_xplained.dts index 6680031387e8..9b7e56790a5a 100644 --- a/arch/arm/boot/dts/microchip/at91-sama5d2_xplained.dts +++ b/arch/arm/boot/dts/microchip/at91-sama5d2_xplained.dts @@ -67,6 +67,8 @@ sdmmc0: sdio-host@a0000000 { pinctrl-0 = <&pinctrl_sdmmc0_default>; non-removable; mmc-ddr-3_3v; + vmmc-supply = <&vdd_3v3_reg>; + vqmmc-supply = <&vdd_3v3_reg>; status = "okay"; };
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-sama5d2_xplained.dts | 2 ++ 1 file changed, 2 insertions(+)