target/linux/rockchip/patches-5.10/105-nanopi-r4s-sd-signalling.patch

   1 From: David Bauer <mail@david-bauer.net>
   2 Subject: arm64: dts: rockchip: disable UHS modes for NanoPi R4S
   3
   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.
   6
   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.
  10
  11 Signed-off-by: David Bauer <mail@david-bauer.net>
  12
  13 --- a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts
  14 +++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts
  15 @@ -121,6 +121,11 @@
  16         status = "disabled";
  17  };
  18
  19 +&sdmmc {
  20 +       /delete-property/ sd-uhs-sdr104;
  21 +       cap-sd-highspeed;
  22 +};
  23 +
  24  &u2phy0_host {
  25         phy-supply = <&vdd_5v>;
  26  };