sdmmc cd pin is configured as RK_FUNC_GPIO which is wrong and indeed failed to detect the sdcard on the board with below error
Card did not respond to voltage select!
So, fix it by replacing RK_FUNC_GPIO with RK_FUNC_1 which is already defined in rk3399.dts so make use of same like other boards.
Add these changes in -u-boot.dtsi to make Linux sync easy for future changes.
Signed-off-by: Jagan Teki jagan@amarulasolutions.com --- arch/arm/dts/rk3399-nanopi4-u-boot.dtsi | 9 +++++++++ 1 file changed, 9 insertions(+) create mode 100644 arch/arm/dts/rk3399-nanopi4-u-boot.dtsi
diff --git a/arch/arm/dts/rk3399-nanopi4-u-boot.dtsi b/arch/arm/dts/rk3399-nanopi4-u-boot.dtsi new file mode 100644 index 0000000000..20db99c0b8 --- /dev/null +++ b/arch/arm/dts/rk3399-nanopi4-u-boot.dtsi @@ -0,0 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2019 Jagan Teki jagan@amarulasolutions.com + */ + +&sdmmc { + pinctrl-names = "default"; + pinctrl-0 = <&sdmmc_bus4 &sdmmc_clk &sdmmc_cmd &sdmmc_cd>; +};