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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: ef75e76716 ("spi: cs42l43: Add SPI controller support")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://msgid.link/r/20240604131704.3227500-1-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Charles Keepax 2024-06-04 14:17:04 +01:00 committed by Greg Kroah-Hartman
parent 5f338cb5ca
commit 9f06731c4e
1 changed files with 1 additions and 1 deletions
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2
drivers/spi/spi-cs42l43.c
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@ -19,7 +19,7 @@
#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 {