This is a note to let you know that I've just added the patch titled
arm64: dts: mt7986: fix emmc hs400 mode without uboot initialization
to the 6.6-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-mt7986-fix-emmc-hs400-mode-without-uboot-initialization.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8dfe51c3f6ef31502fca3e2da8cd250ebbe4b8f2 Mon Sep 17 00:00:00 2001
From: Eric Woudstra <ericwouds@xxxxxxxxx>
Date: Wed, 25 Oct 2023 19:08:28 +0200
Subject: arm64: dts: mt7986: fix emmc hs400 mode without uboot initialization
From: Eric Woudstra <ericwouds@xxxxxxxxx>
commit 8dfe51c3f6ef31502fca3e2da8cd250ebbe4b8f2 upstream.
Eric reports errors on emmc with hs400 mode when booting linux on bpi-r3
without uboot [1]. Booting with uboot does not show this because clocks
seem to be initialized by uboot.
Fix this by adding assigned-clocks and assigned-clock-parents like it's
done in uboot [2].
[1] https://forum.banana-pi.org/t/bpi-r3-kernel-fails-setting-emmc-clock-to-416m-depends-on-u-boot/15170
[2] https://github.com/u-boot/u-boot/blob/master/arch/arm/dts/mt7986.dtsi#L287
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 513b49d19b34 ("arm64: dts: mt7986: add mmc related device nodes")
Signed-off-by: Eric Woudstra <ericwouds@xxxxxxxxx>
Signed-off-by: Frank Wunderlich <frank-w@xxxxxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20231025170832.78727-2-linux@xxxxxxxxx
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/boot/dts/mediatek/mt7986a.dtsi | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm64/boot/dts/mediatek/mt7986a.dtsi b/arch/arm64/boot/dts/mediatek/mt7986a.dtsi
index 24eda00e320d..77ddd9e44ed2 100644
--- a/arch/arm64/boot/dts/mediatek/mt7986a.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt7986a.dtsi
@@ -374,6 +374,10 @@ mmc0: mmc@11230000 {
reg = <0 0x11230000 0 0x1000>,
<0 0x11c20000 0 0x1000>;
interrupts = <GIC_SPI 143 IRQ_TYPE_LEVEL_HIGH>;
+ assigned-clocks = <&topckgen CLK_TOP_EMMC_416M_SEL>,
+ <&topckgen CLK_TOP_EMMC_250M_SEL>;
+ assigned-clock-parents = <&apmixedsys CLK_APMIXED_MPLL>,
+ <&topckgen CLK_TOP_NET1PLL_D5_D2>;
clocks = <&topckgen CLK_TOP_EMMC_416M_SEL>,
<&infracfg CLK_INFRA_MSDC_HCK_CK>,
<&infracfg CLK_INFRA_MSDC_CK>,
--
2.43.0
Patches currently in stable-queue which might be from ericwouds@xxxxxxxxx are
queue-6.6/arm64-dts-mt7986-fix-emmc-hs400-mode-without-uboot-initialization.patch
