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| author | David Bauer <mail@david-bauer.net> | 2022-01-25 21:46:54 +0100 |
|---|---|---|
| committer | David Bauer <mail@david-bauer.net> | 2022-01-27 01:44:28 +0100 |
| commit | 2b583ab8a74a6bd41f1c9629b3b66ba561d6fceb (patch) | |
| tree | 5cdeca41abbe5fddf42ceb963378643a7b1df73e | |
| parent | d8c5406a93d7d99c5abbec6d3a042922b6b4f8e2 (diff) | |
| download | upstream-2b583ab8a74a6bd41f1c9629b3b66ba561d6fceb.tar.gz upstream-2b583ab8a74a6bd41f1c9629b3b66ba561d6fceb.tar.bz2 upstream-2b583ab8a74a6bd41f1c9629b3b66ba561d6fceb.zip | |
rockchip: disable UHS modes for NanoPi R4S
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>
| -rw-r--r-- | target/linux/rockchip/patches-5.10/105-nanopi-r4s-sd-signalling.patch | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/target/linux/rockchip/patches-5.10/105-nanopi-r4s-sd-signalling.patch b/target/linux/rockchip/patches-5.10/105-nanopi-r4s-sd-signalling.patch new file mode 100644 index 0000000000..a04c14b70a --- /dev/null +++ b/target/linux/rockchip/patches-5.10/105-nanopi-r4s-sd-signalling.patch @@ -0,0 +1,26 @@ +From: David Bauer <mail@david-bauer.net> +Subject: arm64: dts: rockchip: disable UHS modes for NanoPi R4S + +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> + +--- a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts ++++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts +@@ -121,6 +121,11 @@ + status = "disabled"; + }; + ++&sdmmc { ++ /delete-property/ sd-uhs-sdr104; ++ cap-sd-highspeed; ++}; ++ + &u2phy0_host { + phy-supply = <&vdd_5v>; + }; |