spi: cs42l43: Correct SPI root clock speed

BugLink: https://bugs.launchpad.net/bugs/2075154

[ 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>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>

This commit is contained in:

Charles Keepax

2024-06-04 14:17:04 +01:00

committed by

Roxana Nicolescu

parent da1ea4538a

commit 3d63fc8511

1 changed files with 1 additions and 1 deletions

									
										drivers/spi/spi-cs42l43.c
									
		+1
		-1
	
												View File
												
				@@ -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 {