| Message ID | 20240206120322.88907-7-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 and sdmmc1 controllers are powered from 3.3V regulator. Same here (for SDMMC0), according to https://ww1.microchip.com/downloads/aemDocuments/documents/MPU32/ProductDocuments/UserGuides/SAMA5D29-Curiosity-EV07R15A-Users-Guide-DS60001822.pdf > 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@microchip.com> > --- > arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts b/arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts > index 6b02b7bcfd49..4a86597d089a 100644 > --- a/arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts > +++ b/arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts > @@ -504,6 +504,8 @@ &sdmmc0 { > pinctrl-names = "default"; > pinctrl-0 = <&pinctrl_sdmmc0_default>; > disable-wp; > + vmmc-supply = <&vdd_3v3>; > + vqmmc-supply = <&vdd_3v3>; > status = "okay"; > }; > > @@ -512,6 +514,8 @@ &sdmmc1 { > pinctrl-names = "default"; > pinctrl-0 = <&pinctrl_sdmmc1_default>; > disable-wp; > + vmmc-supply = <&vdd_3v3>; > + vqmmc-supply = <&vdd_3v3>; > status = "okay"; > }; >
diff --git a/arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts b/arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts index 6b02b7bcfd49..4a86597d089a 100644 --- a/arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts +++ b/arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts @@ -504,6 +504,8 @@ &sdmmc0 { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_sdmmc0_default>; disable-wp; + vmmc-supply = <&vdd_3v3>; + vqmmc-supply = <&vdd_3v3>; status = "okay"; }; @@ -512,6 +514,8 @@ &sdmmc1 { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_sdmmc1_default>; disable-wp; + vmmc-supply = <&vdd_3v3>; + vqmmc-supply = <&vdd_3v3>; status = "okay"; };
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@microchip.com> --- arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts | 4 ++++ 1 file changed, 4 insertions(+)