The spi master driver must have num_chipselect set to allow the bus to initialise. Pass this through the platform data. Signed-off-by: Ben Dooks Index: linux-2.6.27-rc7-quilt2/arch/arm/mach-s3c2410/include/mach/spi-gpio.h =================================================================== --- linux-2.6.27-rc7-quilt2.orig/arch/arm/mach-s3c2410/include/mach/spi-gpio.h 2008-09-23 14:59:56.000000000 +0100 +++ linux-2.6.27-rc7-quilt2/arch/arm/mach-s3c2410/include/mach/spi-gpio.h 2008-09-23 15:58:03.000000000 +0100 @@ -18,6 +18,7 @@ struct s3c2410_spigpio_info { unsigned long pin_mosi; unsigned long pin_miso; + int num_chipselect; int bus_num; void (*chip_select)(struct s3c2410_spigpio_info *spi, int cs); Index: linux-2.6.27-rc7-quilt2/drivers/spi/spi_s3c24xx_gpio.c =================================================================== --- linux-2.6.27-rc7-quilt2.orig/drivers/spi/spi_s3c24xx_gpio.c 2008-09-23 15:01:47.000000000 +0100 +++ linux-2.6.27-rc7-quilt2/drivers/spi/spi_s3c24xx_gpio.c 2008-09-23 15:01:47.000000000 +0100 @@ -118,6 +118,7 @@ static int s3c2410_spigpio_probe(struct /* setup spi bitbang adaptor */ sp->bitbang.master = spi_master_get(master); sp->bitbang.master->bus_num = info->bus_num; + sp->bitbang.master->num_chipselect = info->num_chipselect; sp->bitbang.chipselect = s3c2410_spigpio_chipselect; sp->bitbang.txrx_word[SPI_MODE_0] = s3c2410_spigpio_txrx_mode0; -- Ben (ben-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org, http://www.fluff.org/) 'a smiley only costs 4 bytes' ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/