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

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 the ROCK 4C+ board. Also re-enable
HS400 mode, that was replaced with HS200 mode as a workaround for the
stability issues in:
2bd1d2dd808c ("arm64: dts: rockchip: Disable HS400 for eMMC on ROCK 4C+").

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/20240327192641.14220-3-dev@folker-schwesinger.de
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock-4c-plus.dts b/arch/arm64/boot/dts/rockchip/rk3399-rock-4c-plus.dts
index 7baf9d1b22fd5fd9e88cfd37ade59377d3ce2829..972aea843afd698e21681ea1da9f30d603d7c68a 100644 (file)
--- a/arch/arm64/boot/dts/rockchip/rk3399-rock-4c-plus.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-4c-plus.dts
@@ -151,6 +151,7 @@
 };
 
 &emmc_phy {
+       rockchip,enable-strobe-pulldown;
        status = "okay";
 };
 
@@ -549,7 +550,8 @@
 &sdhci {
        max-frequency = <150000000>;
        bus-width = <8>;
-       mmc-hs200-1_8v;
+       mmc-hs400-1_8v;
+       mmc-hs400-enhanced-strobe;
        non-removable;
        status = "okay";
 };