From 9ed135ca48391848766f61a37580737dcd86524f Mon Sep 17 00:00:00 2001 From: Primoz Fiser Date: Tue, 22 Apr 2025 12:56:34 +0200 Subject: [PATCH] arm64: dts: freescale: imx93-phycore-som: Add eMMC no-1-8-v by default The phyCORE-i.MX93 SoM comes in two variants, one with VDD_IO set to 3.3V and the other variant to 1.8V. The 3.3V variant can only support DDR52 mode, while 1.8V variant is capable of HS400ES eMMC mode. The information about VDD_IO option is encoded in the SoM's EEPROM. EEPROM is read in the bootloader and bootloader clears the "no-1-8-v" flag in case of 1.8V SoM variant is detected. Thus add property 'no-1-8-v' by default to usdhc1 (eMMC) node and let bootloader handle the flag. In case EEPROM is erased or read-out fails, flag "no-1-8-v" also ensures fall-back compatibility with both SoM variants. Signed-off-by: Primoz Fiser Signed-off-by: Shawn Guo --- arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi b/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi index 663530a7e2bb..22dbcc89e311 100644 --- a/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi +++ b/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi @@ -172,6 +172,7 @@ pinctrl-2 = <&pinctrl_usdhc1_200mhz>; bus-width = <8>; non-removable; + no-1-8-v; status = "okay"; }; -- 2.50.1