linux-kernel - [PATCH] spi: cs42l43: Drop cs35l56 SPI speed down to 11MHz

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Date: Fri, 7 Jun 2024 11:34:23 +0100
From: Charles Keepax <ckeepax@...nsource.cirrus.com>
To: <broonie@...nel.org>
CC: <linux-spi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <patches@...nsource.cirrus.com>
Subject: [PATCH] spi: cs42l43: Drop cs35l56 SPI speed down to 11MHz

Some internals of the cs35l56 can only support SPI speeds of up to
11MHz. Whilst some use-cases could support higher rates, keep things
simple by dropping the SPI speed down to this avoid any potential
issues.

Signed-off-by: Charles Keepax <ckeepax@...nsource.cirrus.com>
---
 drivers/spi/spi-cs42l43.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-cs42l43.c b/drivers/spi/spi-cs42l43.c
index 902a0734cc36..8b618ef0f711 100644
--- a/drivers/spi/spi-cs42l43.c
+++ b/drivers/spi/spi-cs42l43.c
@@ -54,7 +54,7 @@ static const struct software_node ampr = {
 
 static struct spi_board_info ampl_info = {
 	.modalias		= "cs35l56",
-	.max_speed_hz		= 20 * HZ_PER_MHZ,
+	.max_speed_hz		= 11 * HZ_PER_MHZ,
 	.chip_select		= 0,
 	.mode			= SPI_MODE_0,
 	.swnode			= &ampl,
@@ -62,7 +62,7 @@ static struct spi_board_info ampl_info = {
 
 static struct spi_board_info ampr_info = {
 	.modalias		= "cs35l56",
-	.max_speed_hz		= 20 * HZ_PER_MHZ,
+	.max_speed_hz		= 11 * HZ_PER_MHZ,
 	.chip_select		= 1,
 	.mode			= SPI_MODE_0,
 	.swnode			= &ampr,
-- 
2.39.2