ARM: make mach/gpio.h headers optional

Most platforms don't need mach/gpio.h and it prevents multi-platform
kernel images. Add CONFIG_NEED_MACH_GPIO_H and make platforns select it
if they need gpio.h. This is platforms that define __GPIOLIB_COMPLEX
or have lots of implicit includes pulled in by mach/gpio.h.

at91 and omap have gpio clean-up pending and can drop
CONFIG_NEED_MACH_GPIO_H once that is in.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index c5f9ae5dbd1a..4f5652d7bfa0 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -202,6 +202,13 @@ config ARM_PATCH_PHYS_VIRT
           this feature (eg, building a kernel for a single machine) and
           you need to shrink the kernel to the minimal size.
 
+config NEED_MACH_GPIO_H
+        bool
+        help
+          Select this when mach/gpio.h is required to provide special
+          definitions for this platform. The need for mach/gpio.h should
+          be avoided when possible.
+
 config NEED_MACH_IO_H
         bool
         help
@@ -345,6 +352,7 @@ config ARCH_AT91
         select HAVE_CLK
         select CLKDEV_LOOKUP
         select IRQ_DOMAIN
+        select NEED_MACH_GPIO_H
         select NEED_MACH_IO_H if PCCARD
         help
           This enables support for systems based on Atmel
@@ -523,6 +531,7 @@ config ARCH_IOP32X
         bool "IOP32x-based"
         depends on MMU
         select CPU_XSCALE
+        select NEED_MACH_GPIO_H
         select NEED_MACH_IO_H
         select NEED_RET_TO_USER
         select PLAT_IOP
@@ -536,6 +545,7 @@ config ARCH_IOP33X
         bool "IOP33x-based"
         depends on MMU
         select CPU_XSCALE
+        select NEED_MACH_GPIO_H
         select NEED_MACH_IO_H
         select NEED_RET_TO_USER
         select PLAT_IOP
@@ -645,6 +655,7 @@ config ARCH_MMP
         select PLAT_PXA
         select SPARSE_IRQ
         select GENERIC_ALLOCATOR
+        select NEED_MACH_GPIO_H
         help
           Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
 
@@ -733,6 +744,7 @@ config ARCH_PXA
         select MULTI_IRQ_HANDLER
         select ARM_CPU_SUSPEND if PM
         select HAVE_IDE
+        select NEED_MACH_GPIO_H
         help
           Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
 
@@ -795,6 +807,7 @@ config ARCH_SA1100
         select CLKDEV_LOOKUP
         select ARCH_REQUIRE_GPIOLIB
         select HAVE_IDE
+        select NEED_MACH_GPIO_H
         select NEED_MACH_MEMORY_H
         select SPARSE_IRQ
         help
@@ -810,6 +823,7 @@ config ARCH_S3C24XX
         select HAVE_S3C2410_I2C if I2C
         select HAVE_S3C_RTC if RTC_CLASS
         select HAVE_S3C2410_WATCHDOG if WATCHDOG
+        select NEED_MACH_GPIO_H
         select NEED_MACH_IO_H
         help
           Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
@@ -837,6 +851,7 @@ config ARCH_S3C64XX
         select SAMSUNG_GPIOLIB_4BIT
         select HAVE_S3C2410_I2C if I2C
         select HAVE_S3C2410_WATCHDOG if WATCHDOG
+        select NEED_MACH_GPIO_H
         help
           Samsung S3C64XX series based systems
 
@@ -851,6 +866,7 @@ config ARCH_S5P64X0
         select GENERIC_CLOCKEVENTS
         select HAVE_S3C2410_I2C if I2C
         select HAVE_S3C_RTC if RTC_CLASS
+        select NEED_MACH_GPIO_H
         help
           Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
           SMDK6450.
@@ -865,6 +881,7 @@ config ARCH_S5PC100
         select HAVE_S3C2410_I2C if I2C
         select HAVE_S3C_RTC if RTC_CLASS
         select HAVE_S3C2410_WATCHDOG if WATCHDOG
+        select NEED_MACH_GPIO_H
         help
           Samsung S5PC100 series based systems
 
@@ -882,6 +899,7 @@ config ARCH_S5PV210
         select HAVE_S3C2410_I2C if I2C
         select HAVE_S3C_RTC if RTC_CLASS
         select HAVE_S3C2410_WATCHDOG if WATCHDOG
+        select NEED_MACH_GPIO_H
         select NEED_MACH_MEMORY_H
         help
           Samsung S5PV210/S5PC110 series based systems
@@ -899,6 +917,7 @@ config ARCH_EXYNOS
         select HAVE_S3C_RTC if RTC_CLASS
         select HAVE_S3C2410_I2C if I2C
         select HAVE_S3C2410_WATCHDOG if WATCHDOG
+        select NEED_MACH_GPIO_H
         select NEED_MACH_MEMORY_H
         help
           Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
@@ -971,6 +990,7 @@ config ARCH_DAVINCI
         select GENERIC_ALLOCATOR
         select GENERIC_IRQ_CHIP
         select ARCH_HAS_HOLES_MEMORYMODEL
+        select NEED_MACH_GPIO_H
         help
           Support for TI's DaVinci platform.
 
@@ -983,6 +1003,7 @@ config ARCH_OMAP
         select CLKSRC_MMIO
         select GENERIC_CLOCKEVENTS
         select ARCH_HAS_HOLES_MEMORYMODEL
+        select NEED_MACH_GPIO_H
         help
           Support for TI's OMAP platform (OMAP1/2/3/4).