[openwrt/openwrt] rockchip: disable UHS modes for NanoPi R4S

[LEDE Commits]

blocktrron pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/2b583ab8a74a6bd41f1c9629b3b66ba561d6fceb

commit 2b583ab8a74a6bd41f1c9629b3b66ba561d6fceb
Author: David Bauer <mail at david-bauer.net>
AuthorDate: Tue Jan 25 21:46:54 2022 +0100

    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 at david-bauer.net>
---
 .../105-nanopi-r4s-sd-signalling.patch             | 26 ++++++++++++++++++++++
 1 file changed, 26 insertions(+)

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 at 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 at 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>;
+ };