linux-kernel - [PATCH 3/3] input: touchscreen: fix link error

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Message-Id: <20190114095754.23175-1-anders.roxell@linaro.org>
Date:   Mon, 14 Jan 2019 10:57:54 +0100
From:   Anders Roxell <anders.roxell@...aro.org>
To:     dmitry.torokhov@...il.com
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Anders Roxell <anders.roxell@...aro.org>
Subject: [PATCH 3/3] input: touchscreen: fix link error

Fix link error when TOUCHSCREEN_RASPBERRYPI_FW is enabled as a module
and the dependent module is built-in.
The 'depends on RASPBERRYPI_FIRMWARE' by itself prevents the touchscreen
driver from being built-in when the firmware is configured as a module.
However, the '|| COMPILE_TEST' still allows it unless we explicitly
prevent that configuration with '|| (RASPBERRYPI_FIRMWARE=n &&
COMPILE_TEST)'

ld: drivers/input/touchscreen/raspberrypi-ts.o: in function `rpi_ts_probe':
raspberrypi-ts.c:(.text+0x3a8): undefined reference to `rpi_firmware_get'
ld: raspberrypi-ts.c:(.text+0x3a8): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `rpi_firmware_get'
ld: raspberrypi-ts.c:(.text+0x4c8): undefined reference to `rpi_firmware_property'
ld: raspberrypi-ts.c:(.text+0x4c8): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `rpi_firmware_property'

Rework so that TOUCHSCREEN_RASPBERRYPI_FW depends on
RASPBERRYPI_FIRMWARE=n if COMPILE_TEST is enabled.

Suggested-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Anders Roxell <anders.roxell@...aro.org>
---
 drivers/input/touchscreen/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index af6027cc7bbf..068dbbc610fc 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -698,7 +698,7 @@ config TOUCHSCREEN_EDT_FT5X06
 
 config TOUCHSCREEN_RASPBERRYPI_FW
 	tristate "Raspberry Pi's firmware base touch screen support"
-	depends on RASPBERRYPI_FIRMWARE || COMPILE_TEST
+	depends on RASPBERRYPI_FIRMWARE || (RASPBERRYPI_FIRMWARE=n && COMPILE_TEST)
 	help
 	  Say Y here if you have the official Raspberry Pi 7 inch screen on
 	  your system.
-- 
2.19.2