linux-kernel - [PATCH v2 5/5] gpio: allow setting ARCH_NR

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Date:	Tue, 16 Feb 2016 16:40:38 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Arnd Bergmann <arnd@...db.de>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Alexandre Courbot <gnurou@...il.com>,
	linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
	Lars-Peter Clausen <lars@...afoo.de>,
	Ralf Baechle <ralf@...ux-mips.org>, linux-mips@...ux-mips.org,
	linux-arch@...r.kernel.org
Subject: [PATCH v2 5/5] gpio: allow setting ARCH_NR_GPIOS from Kconfig

The ARM version of asm/gpio.h basically just contains the same definitions
as the gpiolib version, with the exception of ARCH_NR_GPIOS.

This adds the option for overriding the constant through Kconfig to
the architecture-independent header, so we can remove the ARM specific
file later.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 include/asm-generic/gpio.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index 40ec1433f05d..8ca627dcea11 100644
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -26,8 +26,12 @@
  */
 
 #ifndef ARCH_NR_GPIOS
+#if defined(CONFIG_ARCH_NR_GPIO) && CONFIG_ARCH_NR_GPIO > 0
+#define ARCH_NR_GPIOS CONFIG_ARCH_NR_GPIO
+#else
 #define ARCH_NR_GPIOS		512
 #endif
+#endif
 
 /*
  * "valid" GPIO numbers are nonnegative and may be passed to
-- 
2.7.0