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Commit 94337b72 authored by Baruch Siach's avatar Baruch Siach Committed by Linus Walleij
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gpio: raspberrypi-exp: explain Kconfig dependency 



Commit 7ed91505 (gpio: raspberrypi-ext: fix firmware dependency)
fixed the Kconfig dependency to ensure that gpio-raspberrypi-exp is not
built-in when the firmware is a module. But the Kconfig syntax for doing
so is cryptic. Add a comment to make it a little easier.

Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarBaruch Siach <baruch@tkos.co.il>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 9a3821c2

drivers/gpio/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -126,6 +126,8 @@ config GPIO_RASPBERRYPI_EXP 
	tristate "Raspberry Pi 3 GPIO Expander"

	default RASPBERRYPI_FIRMWARE

	depends on OF_GPIO

	# Make sure not 'y' when RASPBERRYPI_FIRMWARE is 'm'. This can only

	# happen when COMPILE_TEST=y, hence the added !RASPBERRYPI_FIRMWARE.

	depends on (ARCH_BCM2835 && RASPBERRYPI_FIRMWARE) || (COMPILE_TEST && !RASPBERRYPI_FIRMWARE)

	help

	  Turn on GPIO support for the expander on Raspberry Pi 3 boards, using