linux-kernel - [PATCH 1/3] ARM: ARCH_NR_GPIO: Make ARCH_NR

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Message-ID: <1320339647-30255-2-git-send-email-pdeschrijver@nvidia.com>
Date:	Thu, 3 Nov 2011 19:00:45 +0200
From:	Peter De Schrijver <pdeschrijver@...dia.com>
To:	Peter De Schrijver <pdeschrijver@...dia.com>
CC:	Russell King <linux@....linux.org.uk>,
	Paul Mundt <lethal@...ux-sh.org>,
	Magnus Damm <magnus.damm@...il.com>,
	Srinidhi Kasagar <srinidhi.kasagar@...ricsson.com>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	H Hartley Sweeten <hsweeten@...ionengravers.com>,
	David Brown <davidb@...eaurora.org>,
	Rabin Vincent <rabin.vincent@...ricsson.com>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linux-sh@...r.kernel.org>
Subject: [PATCH 1/3] ARM: ARCH_NR_GPIO: Make ARCH_NR_GPIO a Kconfig variable

Change ARCH_NR_GPIO into a Kconfig variable as suggested by Russel King. This
makes ARCH_NR_GPIO single zImage friendly. The default value for tegra is
defined as well.

Signed-off-by: Peter De Schrijver <pdeschrijver@...dia.com>
---
 arch/arm/Kconfig            |    9 +++++++++
 arch/arm/include/asm/gpio.h |    4 ++++
 2 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 7e8ffe7..924f685 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1507,6 +1507,15 @@ config LOCAL_TIMERS
 	  accounting to be spread across the timer interval, preventing a
 	  "thundering herd" at every timer tick.
 
+config ARCH_NR_GPIO
+	int
+	default 1024 if ARCH_TEGRA
+	default 0
+	help
+	  Maximum number of GPIOs in the system.
+
+	  If unsure, leave the default value.
+
 source kernel/Kconfig.preempt
 
 config HZ
diff --git a/arch/arm/include/asm/gpio.h b/arch/arm/include/asm/gpio.h
index 11ad0bf..7151753 100644
--- a/arch/arm/include/asm/gpio.h
+++ b/arch/arm/include/asm/gpio.h
@@ -1,6 +1,10 @@
 #ifndef _ARCH_ARM_GPIO_H
 #define _ARCH_ARM_GPIO_H
 
+#if CONFIG_ARCH_NR_GPIO > 0
+#define ARCH_NR_GPIO CONFIG_ARCH_NR_GPIO
+#endif
+
 /* not all ARM platforms necessarily support this API ... */
 #include <mach/gpio.h>
 
-- 
1.7.7.rc0.72.g4b5ea.dirty

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