mxc/iomux: add GPIO bank offset for iomux v3 platforms

These GPIO bank offsets are useful when define a gpio number.
E.G. when GPIO PORTC pin 6 is used for irq request pin of external
expanding device, we can define it like:
  #define EXP_PARENT_IRQ_PIN (GPIO_PORTC + 6)

Signed-off-by: Jason Wang <jason77.wang@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 15 insertions, 0 deletions

diff --git a/arch/arm/plat-mxc/include/mach/iomux-v3.h b/arch/arm/plat-mxc/include/mach/iomux-v3.h
index f2f73d31d5ba..0880a4a1aed1 100644
--- a/arch/arm/plat-mxc/include/mach/iomux-v3.h
+++ b/arch/arm/plat-mxc/include/mach/iomux-v3.h
@@ -89,6 +89,21 @@ struct pad_desc {
 #define PAD_CTL_SRE_FAST                (1 << 0)
 #define PAD_CTL_SRE_SLOW                (0 << 0)
 
+
+#define MX51_NUM_GPIO_PORT      4
+
+#define GPIO_PIN_MASK 0x1f
+
+#define GPIO_PORT_SHIFT 5
+#define GPIO_PORT_MASK (0x7 << GPIO_PORT_SHIFT)
+
+#define GPIO_PORTA      (0 << GPIO_PORT_SHIFT)
+#define GPIO_PORTB      (1 << GPIO_PORT_SHIFT)
+#define GPIO_PORTC      (2 << GPIO_PORT_SHIFT)
+#define GPIO_PORTD      (3 << GPIO_PORT_SHIFT)
+#define GPIO_PORTE      (4 << GPIO_PORT_SHIFT)
+#define GPIO_PORTF      (5 << GPIO_PORT_SHIFT)
+
 /*
  * setups a single pad in the iomuxer
  */