This is a note to let you know that I've just added the patch titled
mmc: sdhci-sprd: Fix minimum clock limit
to the 5.15-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:
mmc-sdhci-sprd-fix-minimum-clock-limit.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6e141772e6465f937458b35ddcfd0a981b6f5280 Mon Sep 17 00:00:00 2001
From: Wenchao Chen <wenchao.chen@xxxxxxxxxx>
Date: Tue, 11 Oct 2022 18:49:35 +0800
Subject: mmc: sdhci-sprd: Fix minimum clock limit
From: Wenchao Chen <wenchao.chen@xxxxxxxxxx>
commit 6e141772e6465f937458b35ddcfd0a981b6f5280 upstream.
The Spreadtrum controller supports 100KHz minimal clock rate, which means
that the current value 400KHz is wrong.
Unfortunately this has also lead to fail to initialize some cards, which
are allowed to require 100KHz to work. So, let's fix the problem by
changing the minimal supported clock rate to 100KHz.
Signed-off-by: Wenchao Chen <wenchao.chen@xxxxxxxxxx>
Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller")
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20221011104935.10980-1-wenchao.chen666@xxxxxxxxx
[Ulf: Clarified to commit-message]
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/host/sdhci-sprd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/mmc/host/sdhci-sprd.c
+++ b/drivers/mmc/host/sdhci-sprd.c
@@ -296,7 +296,7 @@ static unsigned int sdhci_sprd_get_max_c
static unsigned int sdhci_sprd_get_min_clock(struct sdhci_host *host)
{
- return 400000;
+ return 100000;
}
static void sdhci_sprd_set_uhs_signaling(struct sdhci_host *host,
Patches currently in stable-queue which might be from wenchao.chen@xxxxxxxxxx are
queue-5.15/mmc-sdhci-sprd-fix-minimum-clock-limit.patch
