1 files changed, 5 insertions, 0 deletions

diff --git a/arch/arm/plat-mxc/include/mach/gpio.h b/arch/arm/plat-mxc/include/mach/gpio.h
index af33b74f569e..0044e2f1bea8 100644
--- a/arch/arm/plat-mxc/include/mach/gpio.h
+++ b/arch/arm/plat-mxc/include/mach/gpio.h
@@ -23,6 +23,11 @@
 #include <mach/hardware.h>
 #include <asm-generic/gpio.h>
 
+
+/* There's a off-by-one betweem the gpio bank number and the gpiochip */
+/* range e.g. GPIO_1_5 is gpio 5 under linux */
+#define IMX_GPIO_NR(bank, nr)           (((bank) - 1) * 32 + (nr))
+
 /* use gpiolib dispatchers */
 #define gpio_get_value          __gpio_get_value
 #define gpio_set_value          __gpio_set_value