This is a note to let you know that I've just added the patch titled
arm64: dts: rockchip: lower rk3399-puma-haikou SD controller clock frequency
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm64-dts-rockchip-lower-rk3399-puma-haikou-sd-controller-clock-frequency.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 91e8b74fe6381e083f8aa55217bb0562785ab398 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher <jakob.unterwurzacher@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 19 Oct 2022 16:27:27 +0200
Subject: arm64: dts: rockchip: lower rk3399-puma-haikou SD controller clock frequency
From: Jakob Unterwurzacher <jakob.unterwurzacher@xxxxxxxxxxxxxxxxxxxxx>
commit 91e8b74fe6381e083f8aa55217bb0562785ab398 upstream.
CRC errors (code -84 EILSEQ) have been observed for some SanDisk
Ultra A1 cards when running at 50MHz.
Waveform analysis suggest that the level shifters that are used on the
RK3399-Q7 module for voltage translation between 3.0 and 3.3V don't
handle clock rates at or above 48MHz properly. Back off to 40MHz for
some safety margin.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 60fd9f72ce8a ("arm64: dts: rockchip: add Haikou baseboard with RK3399-Q7 SoM")
Signed-off-by: Jakob Unterwurzacher <jakob.unterwurzacher@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Quentin Schulz <quentin.schulz@xxxxxxxxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20221019-upstream-puma-sd-40mhz-v1-0-754a76421518@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Heiko Stuebner <heiko@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/boot/dts/rockchip/rk3399-puma-haikou.dts | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/arm64/boot/dts/rockchip/rk3399-puma-haikou.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-puma-haikou.dts
@@ -203,7 +203,7 @@
cap-sd-highspeed;
cd-gpios = <&gpio0 RK_PA7 GPIO_ACTIVE_LOW>;
disable-wp;
- max-frequency = <150000000>;
+ max-frequency = <40000000>;
pinctrl-names = "default";
pinctrl-0 = <&sdmmc_clk &sdmmc_cmd &sdmmc_cd &sdmmc_bus4>;
vmmc-supply = <&vcc3v3_baseboard>;
Patches currently in stable-queue which might be from jakob.unterwurzacher@xxxxxxxxxxxxxxxxxxxxx are
queue-4.19/arm64-dts-rockchip-lower-rk3399-puma-haikou-sd-controller-clock-frequency.patch
