arm64: dts: rockchip: Add enable-strobe-pulldown to emmc phy on ROCK Pi 4

Commit 8b5c2b45b8f0 disabled the internal pull-down for the strobe line
causing I/O errors in HS400 mode for various eMMC modules.

Enable the internal strobe pull-down for ROCK Pi 4 boards. Also re-enable
HS400 mode, that was replaced with HS200 mode as a workaround for the
stability issues in:
cee572756aa2 ("arm64: dts: rockchip: Disable HS400 for eMMC on ROCK Pi 4").

This was tested on ROCK 4SE and ROCK Pi 4B+.

Fixes: 8b5c2b45b8f0 ("phy: rockchip: set pulldown for strobe line in dts")
Signed-off-by: Folker Schwesinger <dev@folker-schwesinger.de>
Reviewed-by: Dragan Simic <dsimic@manjaro.org>
Link: https://lore.kernel.org/r/20240327192641.14220-2-dev@folker-schwesinger.de
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
index 281a12180703433462fa9f4fb7e0ed1f2dfaeeef..b9d6284bb804f7fcb0d6408397a9cf632978199b 100644 (file)
--- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
@@ -194,6 +194,7 @@
 };
 
 &emmc_phy {
+       rockchip,enable-strobe-pulldown;
        status = "okay";
 };
 
@@ -648,7 +649,8 @@
 &sdhci {
        max-frequency = <150000000>;
        bus-width = <8>;
-       mmc-hs200-1_8v;
+       mmc-hs400-1_8v;
+       mmc-hs400-enhanced-strobe;
        non-removable;
        status = "okay";
 };