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rockchip: fix eMMC corruption on NanoPC-T6 with A3A444 chips 

Some NanoPC-T6 boards with A3A444 eMMC chips experience I/O errors and
corruption when using HS400 mode. Downgrade to HS200 mode to ensure
stable operation.

Fixes: #18844
Signed-off-by: Grzegorz Sterniczuk <grzegorz@sternicz.uk>
Link: https://github.com/openwrt/openwrt/pull/19398
[Add patch header]
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Grzegorz Sterniczuk 2025-07-13 17:22:33 +02:00 committed by Hauke Mehrtens
parent 7fe06b7f56
commit c4586ceae8
1 changed files with 27 additions and 0 deletions
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27
target/linux/rockchip/patches-6.12/131-arm64-dts-rockchip-rk3588-fix-A3A444-nanopc-t6.patch Normal file
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@ -0,0 +1,27 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Grzegorz Sterniczuk <grzegorz@sternicz.uk>
Date: Mon, 21 Jul 2025 23:24:11 +0200
Subject: rockchip: fix eMMC corruption on NanoPC-T6 with A3A444 chips
Some NanoPC-T6 boards with A3A444 eMMC chips experience I/O errors and
corruption when using HS400 mode. Downgrade to HS200 mode to ensure
stable operation.
Fixes: #18844
Signed-off-by: Grzegorz Sterniczuk <grzegorz@sternicz.uk>
---
arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi
@@ -619,8 +619,7 @@
no-sd;
non-removable;
max-frequency = <200000000>;
- mmc-hs400-1_8v;
- mmc-hs400-enhanced-strobe;
+ mmc-hs200-1_8v;
status = "okay";
};