From 4b3a30e9ae304f1350d7dc17b3e0d2ef90e2b668 Mon Sep 17 00:00:00 2001 From: Eric Nelson <eric.nelson@boundarydevices.com> Date: Tue, 31 Jan 2012 07:52:01 +0000 Subject: [PATCH] mx6q: define GPIO macros for translating between ordinals and port:index The interface to the mxc_gpio driver uses integer (ordinal) values to refer to all GPIOs on the i.MX processors. The registers themselves and much of the i.MX documentation are banked in groups of 32, and these macros allow the use of the port:index numbering for clarity. GPIO_NUMBER() converts to ordinal value from port:index GPIO_PORT() returns the port of an ordinal value GPIO_INDEX() returns the index or offset of the ordinal. Discussion on the mailing list at http://lists.denx.de/pipermail/u-boot/2012-January/116927.html Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com> Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com> --- arch/arm/include/asm/arch-mx6/imx-regs.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm/include/asm/arch-mx6/imx-regs.h b/arch/arm/include/asm/arch-mx6/imx-regs.h index 5227b44fbf..8a9eeb4d1c 100644 --- a/arch/arm/include/asm/arch-mx6/imx-regs.h +++ b/arch/arm/include/asm/arch-mx6/imx-regs.h @@ -164,6 +164,10 @@ #define IRAM_SIZE 0x00040000 #define IMX_IIM_BASE OCOTP_BASE_ADDR +#define GPIO_NUMBER(port, index) ((((port)-1)*32)+((index)&31)) +#define GPIO_TO_PORT(number) (((number)/32)+1) +#define GPIO_TO_INDEX(number) ((number)&31) + #if !(defined(__KERNEL_STRICT_NAMES) || defined(__ASSEMBLY__)) #include <asm/types.h> -- 2.39.5