[ARM] S3C24XX: Add extra GPIOs via Kconfig

Add Kconfig entries to allow more GPIO space to
be specified depending on the machine(s) selected.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

3 files changed, 29 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c2410/include/mach/gpio.h b/arch/arm/mach-s3c2410/include/mach/gpio.h
index 3b52b86498a6..e0349af8a483 100644
--- a/arch/arm/mach-s3c2410/include/mach/gpio.h
+++ b/arch/arm/mach-s3c2410/include/mach/gpio.h
@@ -15,4 +15,10 @@
 #define gpio_set_value  __gpio_set_value
 #define gpio_cansleep   __gpio_cansleep
 
+/* some boards require extra gpio capacity to support external
+ * devices that need GPIO.
+ */
+
+#define ARCH_NR_GPIOS   (256 + CONFIG_S3C24XX_GPIO_EXTRA)
+
 #include <asm-generic/gpio.h>
diff --git a/arch/arm/mach-s3c2440/Kconfig b/arch/arm/mach-s3c2440/Kconfig
index 0429d255b0d8..402213dc5d85 100644
--- a/arch/arm/mach-s3c2440/Kconfig
+++ b/arch/arm/mach-s3c2440/Kconfig
@@ -31,6 +31,7 @@ config MACH_ANUBIS
         select CPU_S3C2440
         select PM_SIMTEC if PM
         select HAVE_PATA_PLATFORM
+        select S3C24XX_GPIO_EXTRA64
         help
           Say Y here if you are using the Simtec Electronics ANUBIS
           development system
@@ -39,6 +40,7 @@ config MACH_OSIRIS
         bool "Simtec IM2440D20 (OSIRIS) module"
         select CPU_S3C2440
         select PM_SIMTEC if PM
+        select S3C24XX_GPIO_EXTRA128
         help
           Say Y here if you are using the Simtec IM2440D20 module, also
           known as the Osiris.
diff --git a/arch/arm/plat-s3c24xx/Kconfig b/arch/arm/plat-s3c24xx/Kconfig
index 0af3872fb763..7fe28aaa08ca 100644
--- a/arch/arm/plat-s3c24xx/Kconfig
+++ b/arch/arm/plat-s3c24xx/Kconfig
@@ -28,6 +28,27 @@ config S3C24XX_PWM
           Support for exporting the PWM timer blocks via the pwm device
           system.
 
+
+# gpio configurations
+
+config S3C24XX_GPIO_EXTRA
+        int
+        default 128 if S3C24XX_GPIO_EXTRA128
+        default 64 if S3C24XX_GPIO_EXTRA64
+        default 0
+
+config S3C24XX_GPIO_EXTRA64
+        bool
+        help
+          Add an extra 64 gpio numbers to the available GPIO pool. This is
+          available for boards that need extra gpios for external devices.
+
+config S3C24XX_GPIO_EXTRA128
+        bool
+        help
+          Add an extra 128 gpio numbers to the available GPIO pool. This is
+          available for boards that need extra gpios for external devices.
+
 config PM_SIMTEC
         bool
         help