6.12-stable review patch. If anyone has any objections, please let me know.
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From: Cristian Birsan cristian.birsan@microchip.com
[ Upstream commit c21c23a0f2e9869676eff0d53fb89e151e14c873 ]
Add no-1-8-v property to sdmmc0 node to keep VDDSDMMC power rail at 3.3V. This property will stop the LDO regulator from switching to 1.8V when the MMC core detects an UHS SD Card. VDDSDMMC power rail is used by all the SDMMC interface pins in GPIO mode (PA0 - PA13).
On this board, PA6 is used as GPIO to enable the power switch controlling USB Vbus for the USB Host. The change is needed to fix the PA6 voltage level to 3.3V instead of 1.8V.
Fixes: d85c4229e925 ("ARM: dts: at91: sama5d29_curiosity: Add device tree for sama5d29_curiosity board") Suggested-by: Mihai Sain mihai.sain@microchip.com Signed-off-by: Cristian Birsan cristian.birsan@microchip.com Tested-by: Andrei Simion andrei.simion@microchip.com Link: https://lore.kernel.org/r/20241119160107.598411-2-cristian.birsan@microchip.... Signed-off-by: Claudiu Beznea claudiu.beznea@tuxon.dev Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts b/arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts index 951a0c97d3c6b..5933840bb8f7e 100644 --- a/arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts +++ b/arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dts @@ -514,6 +514,7 @@
&sdmmc0 { bus-width = <4>; + no-1-8-v; pinctrl-names = "default"; pinctrl-0 = <&pinctrl_sdmmc0_default>; disable-wp;