[ARM] S3C64XX: Add gpio bank numbering

Define the gpio numbers for the S3C64XX GPIO banks
available on the S3C6400 and S3C6410.

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

2 files changed, 82 insertions, 1 deletions

diff --git a/arch/arm/mach-s3c6400/include/mach/gpio.h b/arch/arm/mach-s3c6400/include/mach/gpio.h
index 8b4254a23d9a..8600c818a46f 100644
--- a/arch/arm/mach-s3c6400/include/mach/gpio.h
+++ b/arch/arm/mach-s3c6400/include/mach/gpio.h
@@ -17,6 +17,76 @@
 #define gpio_cansleep   __gpio_cansleep
 #define gpio_to_irq     __gpio_to_irq
 
-#define ARCH_NR_GPIOS   188
+/* GPIO bank sizes */
+#define S3C64XX_GPIO_A_NR       (8)
+#define S3C64XX_GPIO_B_NR       (7)
+#define S3C64XX_GPIO_C_NR       (8)
+#define S3C64XX_GPIO_D_NR       (5)
+#define S3C64XX_GPIO_E_NR       (5)
+#define S3C64XX_GPIO_F_NR       (16)
+#define S3C64XX_GPIO_G_NR       (7)
+#define S3C64XX_GPIO_H_NR       (10)
+#define S3C64XX_GPIO_I_NR       (16)
+#define S3C64XX_GPIO_J_NR       (12)
+#define S3C64XX_GPIO_K_NR       (16)
+#define S3C64XX_GPIO_L_NR       (15)
+#define S3C64XX_GPIO_M_NR       (6)
+#define S3C64XX_GPIO_N_NR       (16)
+#define S3C64XX_GPIO_O_NR       (16)
+#define S3C64XX_GPIO_P_NR       (15)
+#define S3C64XX_GPIO_Q_NR       (9)
+
+/* GPIO bank numbes */
+
+/* CONFIG_S3C_GPIO_SPACE allows the user to select extra
+ * space for debugging purposes so that any accidental
+ * change from one gpio bank to another can be caught.
+*/
+
+#define S3C64XX_GPIO_NEXT(__gpio) \
+        ((__gpio##_START) + (__gpio##_NR) + CONFIG_S3C_GPIO_SPACE + 1)
+
+enum s3c_gpio_number {
+        S3C64XX_GPIO_A_START = 0,
+        S3C64XX_GPIO_B_START = S3C64XX_GPIO_NEXT(S3C64XX_GPIO_A),
+        S3C64XX_GPIO_C_START = S3C64XX_GPIO_NEXT(S3C64XX_GPIO_B),
+        S3C64XX_GPIO_D_START = S3C64XX_GPIO_NEXT(S3C64XX_GPIO_C),
+        S3C64XX_GPIO_E_START = S3C64XX_GPIO_NEXT(S3C64XX_GPIO_D),
+        S3C64XX_GPIO_F_START = S3C64XX_GPIO_NEXT(S3C64XX_GPIO_E),
+        S3C64XX_GPIO_G_START = S3C64XX_GPIO_NEXT(S3C64XX_GPIO_F),
+        S3C64XX_GPIO_H_START = S3C64XX_GPIO_NEXT(S3C64XX_GPIO_G),
+        S3C64XX_GPIO_I_START = S3C64XX_GPIO_NEXT(S3C64XX_GPIO_H),
+        S3C64XX_GPIO_J_START = S3C64XX_GPIO_NEXT(S3C64XX_GPIO_I),
+        S3C64XX_GPIO_K_START = S3C64XX_GPIO_NEXT(S3C64XX_GPIO_J),
+        S3C64XX_GPIO_L_START = S3C64XX_GPIO_NEXT(S3C64XX_GPIO_K),
+        S3C64XX_GPIO_M_START = S3C64XX_GPIO_NEXT(S3C64XX_GPIO_L),
+        S3C64XX_GPIO_N_START = S3C64XX_GPIO_NEXT(S3C64XX_GPIO_M),
+        S3C64XX_GPIO_O_START = S3C64XX_GPIO_NEXT(S3C64XX_GPIO_N),
+        S3C64XX_GPIO_P_START = S3C64XX_GPIO_NEXT(S3C64XX_GPIO_O),
+        S3C64XX_GPIO_Q_START = S3C64XX_GPIO_NEXT(S3C64XX_GPIO_P),
+};
+
+/* S3C64XX GPIO number definitions. */
+
+#define S3C64XX_GPA(_nr)        (S3C64XX_GPIO_A_START + (_nr))
+#define S3C64XX_GPB(_nr)        (S3C64XX_GPIO_B_START + (_nr))
+#define S3C64XX_GPC(_nr)        (S3C64XX_GPIO_C_START + (_nr))
+#define S3C64XX_GPD(_nr)        (S3C64XX_GPIO_D_START + (_nr))
+#define S3C64XX_GPE(_nr)        (S3C64XX_GPIO_E_START + (_nr))
+#define S3C64XX_GPF(_nr)        (S3C64XX_GPIO_F_START + (_nr))
+#define S3C64XX_GPG(_nr)        (S3C64XX_GPIO_G_START + (_nr))
+#define S3C64XX_GPH(_nr)        (S3C64XX_GPIO_H_START + (_nr))
+#define S3C64XX_GPI(_nr)        (S3C64XX_GPIO_I_START + (_nr))
+#define S3C64XX_GPJ(_nr)        (S3C64XX_GPIO_J_START + (_nr))
+#define S3C64XX_GPK(_nr)        (S3C64XX_GPIO_K_START + (_nr))
+#define S3C64XX_GPL(_nr)        (S3C64XX_GPIO_L_START + (_nr))
+#define S3C64XX_GPM(_nr)        (S3C64XX_GPIO_M_START + (_nr))
+#define S3C64XX_GPN(_nr)        (S3C64XX_GPIO_N_START + (_nr))
+#define S3C64XX_GPO(_nr)        (S3C64XX_GPIO_O_START + (_nr))
+#define S3C64XX_GPP(_nr)        (S3C64XX_GPIO_P_START + (_nr))
+#define S3C64XX_GPQ(_nr)        (S3C64XX_GPIO_Q_START + (_nr))
+
+/* define the number of gpios we need to the one after the GPQ() range */
+#define ARCH_NR_GPIOS   (S3C64XX_GPQ(S3C64XX_GPIO_Q_NR) + 1)
 
 #include <asm-generic/gpio.h>
diff --git a/arch/arm/plat-s3c/Kconfig b/arch/arm/plat-s3c/Kconfig
index 0deb1054975f..d7767e0305d0 100644
--- a/arch/arm/plat-s3c/Kconfig
+++ b/arch/arm/plat-s3c/Kconfig
@@ -103,6 +103,17 @@ config S3C_LOWLEVEL_UART_PORT
           this configuration should be between zero and two. The port
           must have been initialised by the boot-loader before use.
 
+# options for gpiolib support
+
+config S3C_GPIO_SPACE
+        int "Space between gpio banks"
+        default 0
+        help
+          Add a number of spare GPIO entries between each bank for debugging
+          purposes. This allows any problems where an counter overflows from
+          one bank to another to be caught, at the expense of using a little
+          more memory.
+
 # device definitions to compile in
 
 config S3C_DEV_HSMMC