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>

diff --git a/arch/arm/plat-mxc/include/mach/iomux-v3.h b/arch/arm/plat-mxc/include/mach/iomux-v3.h
index f2f73d3..0880a4a 100644 (file)
--- 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
  */