diff mbox series

[v3,8/8] ARM: dts: microchip: sama5d2_xplained: Add power-supply property for sdmmc0 node

Message ID 20240206120322.88907-9-mihai.sain@microchip.com
State New
Headers
Series Add power-supply properties for sdmmc nodes on Microchip boards |

Commit Message

Mihai Sain Feb. 6, 2024, 12:03 p.m. UTC 
  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(+)

Comments

claudiu beznea Feb. 18, 2024, 2:46 p.m. UTC | #1 
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 mbox series

Patch

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";
 		};