From d1e7780638a9192f15caf590e0081bf915fdef71 Mon Sep 17 00:00:00 2001
From: Ben Dooks <ben-linux@fluff.org>
Date: Tue, 15 Apr 2008 14:34:46 -0700
Subject: [PATCH] spi: spi_s3c24xx must initialize num_chipselect
The SPI core now expects num_chipselect to be set correctly as due to added
checks on the chip being selected before an transfer is allowed. This patch
adds a num_cs field to the platform data which needs to be set correctly
before adding the SPI platform device.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
drivers/spi/spi_s3c24xx.c | 4 ++++
include/asm-arm/arch-s3c2410/spi.h | 1 +
2 files changed, 5 insertions(+)
diff --git a/drivers/spi/spi_s3c24xx.c b/drivers/spi/spi_s3c24xx.c
index 80719ef54365..b7476b888197 100644
--- a/drivers/spi/spi_s3c24xx.c
+++ b/drivers/spi/spi_s3c24xx.c
@@ -267,6 +267,10 @@ static int __init s3c24xx_spi_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, hw);
init_completion(&hw->done);
+ /* setup the master state. */
+
+ master->num_chipselect = hw->pdata->num_cs;
+
/* setup the state for the bitbang driver */
hw->bitbang.master = hw->master;
diff --git a/include/asm-arm/arch-s3c2410/spi.h b/include/asm-arm/arch-s3c2410/spi.h
index 7ca0ed97a6d0..352d33860b63 100644
--- a/include/asm-arm/arch-s3c2410/spi.h
+++ b/include/asm-arm/arch-s3c2410/spi.h
@@ -15,6 +15,7 @@
struct s3c2410_spi_info {
unsigned long pin_cs; /* simple gpio cs */
+ unsigned int num_cs; /* total chipselects */
void (*set_cs)(struct s3c2410_spi_info *spi, int cs, int pol);
};
--
2.20.1