linux-kernel - [PATCH next v2] spi: Raise limit on number of chip selects to 24

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Message-Id: <20250629-spi-increase-number-of-cs-v2-1-85a0a09bab32@pengutronix.de>
Date: Sun, 29 Jun 2025 18:15:32 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: Mark Brown <broonie@...nel.org>
Cc: linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org, 
 kernel@...gutronix.de, Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH next v2] spi: Raise limit on number of chip selects to 24

We have a system which uses 24 SPI chip selects, raise the hard coded
limit accordingly.

Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
Changes in v2:
- EDITME: describe what is new in this series revision.
- EDITME: use bulletpoints and terse descriptions.
- Link to v1: https://patch.msgid.link/20250629-spi-increase-number-of-cs-v1-1-df791bf4b370@pengutronix.de
---
 include/linux/spi/spi.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 4789f91dae94..e9ea43234d9a 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -21,7 +21,7 @@
 #include <uapi/linux/spi/spi.h>
 
 /* Max no. of CS supported per spi device */
-#define SPI_CS_CNT_MAX 16
+#define SPI_CS_CNT_MAX 24
 
 struct dma_chan;
 struct software_node;

---
base-commit: 3e36c822506d924894ff7de549b9377d3114c2d7
change-id: 20250627-spi-increase-number-of-cs-deeb23bcd578

Best regards,
-- 
Marc Kleine-Budde <mkl@...gutronix.de>