1 From: David Bauer <mail@david-bauer.net>
2 Subject: arm64: dts: rockchip: disable UHS modes for NanoPi R4S
4 The NanoPi R4S leaves the SD card in 1.8V signalling when rebooting
5 while U-Boot requires the card to be in 3.3V mode.
7 Remove UHS support from the SD controller so the card remains in 3.3V
8 mode. This reduces transfer speeds but ensures a reboot whether from
9 userspace or following a kernel panic is always working.
11 Signed-off-by: David Bauer <mail@david-bauer.net>
13 --- a/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts
14 +++ b/arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts
20 vmmc-supply = <&vcc_sd>;
21 vqmmc-supply = <&vcc_sdio>;
23 --- a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts
24 +++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts
30 + /delete-property/ sd-uhs-sdr104;
35 phy-supply = <&vdd_5v>;