This is a note to let you know that I've just added the patch titled
spi: cs42l43: Correct SPI root clock speed
to the 6.9-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:
spi-cs42l43-correct-spi-root-clock-speed.patch
and it can be found in the queue-6.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 07b46d530e9f918a2ca289eccca61b8938ad4083
Author: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxx>
Date: Tue Jun 4 14:17:04 2024 +0100
spi: cs42l43: Correct SPI root clock speed
[ Upstream commit 4eecb644b8b82f5279a348f6ebe77e3d6e5b1b05 ]
The root clock is actually 49.152MHz not 40MHz, as it is derived from
the primary audio clock, update the driver to match. This error can
cause the actual clock rate to be higher than the requested clock rate
on the SPI bus.
Fixes: ef75e767167a ("spi: cs42l43: Add SPI controller support")
Signed-off-by: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxx>
Link: https://msgid.link/r/20240604131704.3227500-1-ckeepax@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/spi/spi-cs42l43.c b/drivers/spi/spi-cs42l43.c
index aabef9fc84bdf..0d9c948e119af 100644
--- a/drivers/spi/spi-cs42l43.c
+++ b/drivers/spi/spi-cs42l43.c
@@ -21,7 +21,7 @@
#include <linux/units.h>
#define CS42L43_FIFO_SIZE 16
-#define CS42L43_SPI_ROOT_HZ (40 * HZ_PER_MHZ)
+#define CS42L43_SPI_ROOT_HZ 49152000
#define CS42L43_SPI_MAX_LENGTH 65532
enum cs42l43_spi_cmd {
