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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>
hifive-unleashed-5.1
Ben Dooks 2008-04-15 14:34:46 -07:00 committed by Linus Torvalds
parent 50f426b55d
commit d1e7780638
2 changed files with 5 additions and 0 deletions
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4
drivers/spi/spi_s3c24xx.c
View File

@ -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;

1
include/asm-arm/arch-s3c2410/spi.h
View File

@ -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);
};