[PATCH 6/6] [v5] gpiolib: turn off legacy interface by default

[Arnd Bergmann <arnd@kernel.org>]

From: Arnd Bergmann <arnd@arndb.de>

All users of the legacy interface now select CONFIG_GPIOLIB_LEGACY,
so it can be turned off by default and only get built on platforms
that still have one unconverted driver.

Allow turning it on manually for compile testing, in order to keep
the build coverage of the legacy drivers in allmodconfig and
randconfig.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
v5: added patch, now that we are getting closer to completing
    the series
---
 drivers/gpio/Kconfig | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 28cf6d2e83c2..f063bdfd111b 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -4,7 +4,14 @@
 #
 
 config GPIOLIB_LEGACY
-	def_bool y
+	bool "Legacy GPIO interfaces" if COMPILE_TEST
+	help
+	  There are a few legacy platforms that use the traditional GPIO
+	  number based interfaces instead of GPIO descriptors.
+	  Say Y here to enable build testing drivers that are specific
+	  to those platforms.
+
+	  If unsure, say N.
 
 config HAVE_SHARED_GPIOS
 	bool
-- 
2.39.5