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>
diff --git a/arch/arm/include/asm/gpio.h b/arch/arm/include/asm/gpio.h
index c402e9b..477e020 100644
--- a/arch/arm/include/asm/gpio.h
+++ b/arch/arm/include/asm/gpio.h
@@ -6,7 +6,9 @@
#endif
/* not all ARM platforms necessarily support this API ... */
+#ifdef CONFIG_NEED_MACH_GPIO_H
#include <mach/gpio.h>
+#endif
#ifndef __ARM_GPIOLIB_COMPLEX
/* Note: this may rely upon the value of ARCH_NR_GPIOS set in mach/gpio.h */