Enable the 'rockchip,disable-runtime-pm' quirk for the SDMMC node on the 
NanoPi R76S to prevent bus instability and retraining loops during 
idle periods.

Signed-off-by: Marco Schirrmeister <redacted>
---
 arch/arm64/boot/dts/rockchip/rk3576-nanopi-r76s.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3576-nanopi-r76s.dts b/arch/arm64/boot/dts/rockchip/rk3576-nanopi-r76s.dts
index 31fbefaeceab..90a798ee9e68 100644
--- a/arch/arm64/boot/dts/rockchip/rk3576-nanopi-r76s.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3576-nanopi-r76s.dts

@@ -754,6 +754,7 @@ &sdmmc {
 	disable-wp;
 	no-mmc;
 	no-sdio;
+	rockchip,disable-runtime-pm;
 	sd-uhs-sdr104;
 	vmmc-supply = <&vcc_3v3_s3>;
 	vqmmc-supply = <&vccio_sd_s0>;

-- 
2.52.0