spi: S3C2410: add bus number to SPI GPIO driver

Allow passing a bus number through the platform data for the S3C2410 SPI
GPIO driver.   This is needed to support multiple SPI busses.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/spi/spi_s3c24xx_gpio.c

@@ -118,6 +118,7 @@ static int s3c2410_spigpio_probe(struct platform_device *dev)
 
 	/* setup spi bitbang adaptor */
 	sp->bitbang.master = spi_master_get(master);
+	sp->bitbang.master->bus_num = info->bus_num;
 	sp->bitbang.chipselect = s3c2410_spigpio_chipselect;
 
 	sp->bitbang.txrx_word[SPI_MODE_0] = s3c2410_spigpio_txrx_mode0;

include/asm-arm/arch-s3c2410/spi-gpio.h

@@ -21,6 +21,8 @@ struct s3c2410_spigpio_info {
 	unsigned long		 pin_mosi;
 	unsigned long		 pin_miso;
 
+	int			 bus_num;
+
 	unsigned long		 board_size;
 	struct spi_board_info	*board_info;