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path: root/target/linux/rockchip/patches-5.10/105-nanopi-r4s-sd-signalling.patch
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* rockchip: disable UHS modes for NanoPi R4SDavid Bauer2022-01-271-0/+26
The NanoPi R4S leaves the SD card in 1.8V signalling when rebooting while U-Boot requires the card to be in 3.3V mode. Remove UHS support from the SD controller so the card remains in 3.3V mode. This reduces transfer speeds but ensures a reboot whether from userspace or following a kernel panic is always working. Signed-off-by: David Bauer <mail@david-bauer.net>