linux-kernel - [PATCH] ARM: exynos: clarify KEYBOARD

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Message-Id: <1455204662-1017820-1-git-send-email-arnd@arndb.de>
Date:	Thu, 11 Feb 2016 16:30:56 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Kukjin Kim <kgene@...nel.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Arnd Bergmann <arnd@...db.de>,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ARM: exynos: clarify KEYBOARD_SAMSUNG selection

The samsung-keypad driver is implicitly selected by ARCH_EXYNOS4 (why?),
but this fails if CONFIG_INPUT is a loadable module:

drivers/input/built-in.o: In function `samsung_keypad_remove':
drivers/input/keyboard/samsung-keypad.c:461: undefined reference to `input_unregister_device'
drivers/input/built-in.o: In function `samsung_keypad_irq':
drivers/input/keyboard/samsung-keypad.c:137: undefined reference to `input_event'
drivers/input/built-in.o: In function `samsung_keypad_irq':
include/linux/input.h:389: undefined reference to `input_event'
drivers/input/built-in.o: In function `samsung_keypad_probe':
drivers/input/keyboard/samsung-keypad.c:358: undefined reference to `devm_input_allocate_device'
drivers/input/built-in.o:(.debug_addr+0x34): undefined reference to `input_set_capability'

This changes the 'select' statement so we don't do it if CONFIG_INPUT=m.
The problem does not happen on mainline kernels, as we don't normally
build built-in input drivers when CONFIG_INPUT=m, but I am experimenting
with a patch to change this, and the samsung keypad driver showed up
as one example that was silently broken before.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 arch/arm/mach-exynos/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index 8434a0f6334c..b63e64581c24 100644
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -59,7 +59,7 @@ config ARCH_EXYNOS4
 	select CLKSRC_SAMSUNG_PWM if CPU_EXYNOS4210
 	select CPU_EXYNOS4210
 	select GIC_NON_BANKED
-	select KEYBOARD_SAMSUNG if INPUT_KEYBOARD
+	select KEYBOARD_SAMSUNG if INPUT=y && INPUT_KEYBOARD
 	select MIGHT_HAVE_CACHE_L2X0
 	help
 	  Samsung EXYNOS4 (Cortex-A9) SoC based systems
-- 
2.7.0