[ARM] 3284/1: S3C2400 - adds support to GPIO

Patch from Lucas Correia Villa Real

This patch adds support to GPIO on the S3C2400, which is going to
be used by the GP32 machine and the SMDK2400 development board.

Signed-off-by: Lucas Correia Villa Real <lucasvr@gobolinux.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 22 insertions, 0 deletions

diff --git a/include/asm-arm/arch-s3c2410/regs-gpio.h b/include/asm-arm/arch-s3c2410/regs-gpio.h
index 7f1be48ad67e..9697f93afe74 100644
--- a/include/asm-arm/arch-s3c2410/regs-gpio.h
+++ b/include/asm-arm/arch-s3c2410/regs-gpio.h
@@ -22,6 +22,7 @@
  *    28-Mar-2005    LCVR    Fixed definition of GPB10
  *    26-Oct-2005    BJD     Added generic configuration types
  *    27-Nov-2005    LCVR    Added definitions to S3C2400 registers
+ *    15-Jan-2006    LCVR    Written S3C24XX_GPIO_BASE() macro
 */
 
 
@@ -39,6 +40,27 @@
 #define S3C2410_GPIO_BANKG   (32*6)
 #define S3C2410_GPIO_BANKH   (32*7)
 
+#ifdef CONFIG_CPU_S3C2400
+#define S3C24XX_GPIO_BASE(x)  S3C2400_GPIO_BASE(x)
+#define S3C24XX_MISCCR        S3C2400_MISCCR
+#else
+#define S3C24XX_GPIO_BASE(x)  S3C2410_GPIO_BASE(x)
+#define S3C24XX_MISCCR        S3C2410_MISCCR
+#endif /* CONFIG_CPU_S3C2400 */
+
+
+/* S3C2400 doesn't have a 1:1 mapping to S3C2410 gpio base pins */
+
+#define S3C2400_BANKNUM(pin)     (((pin) & ~31) / 32)
+#define S3C2400_BASEA2B(pin)     ((((pin) & ~31) >> 2))
+#define S3C2400_BASEC2H(pin)     ((S3C2400_BANKNUM(pin) * 10) + \
+                                 (2 * (S3C2400_BANKNUM(pin)-2)))
+
+#define S3C2400_GPIO_BASE(pin)   (pin < S3C2410_GPIO_BANKC ? \
+                                 S3C2400_BASEA2B(pin)+S3C24XX_VA_GPIO : \
+                                 S3C2400_BASEC2H(pin)+S3C24XX_VA_GPIO)
+
+
 #define S3C2410_GPIO_BASE(pin)   ((((pin) & ~31) >> 1) + S3C24XX_VA_GPIO)
 #define S3C2410_GPIO_OFFSET(pin) ((pin) & 31)