[PATCH 16/23] gpio: Add a GPIO config

[Simon Glass]

At present we have SPL_GPIO and TPL_GPIO but not piain GPIO. This
works because there is a special build rule in Makefile that always
includes the drivers/gpio directory.

It is better to have all driver directories included by drivers/Makefile
and there is already a rule in there for this purpose. It just needs a
Kconfig for U-Boot proper, so add one.

Enable the option always for now, since this mimics current behaviour.
This can be updated once DM_GPIO is used everywhere.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 Makefile             |  1 -
 drivers/gpio/Kconfig | 16 ++++++++++++++--
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index f5b6b493a7f..cc51265f1fc 100644
--- a/Makefile
+++ b/Makefile
@@ -813,7 +813,6 @@ libs-y += fs/
 libs-y += net/
 libs-y += disk/
 libs-y += drivers/
-libs-y += drivers/gpio/
 libs-y += drivers/net/
 libs-y += drivers/net/phy/
 libs-y += drivers/power/ \
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 09695f6c2b0..d1069e6d00e 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -2,7 +2,19 @@
 # GPIO infrastructure and drivers
 #
 
-menu "GPIO Support"
+menuconfig GPIO
+	bool "GPIO support"
+	default y
+	help
+	  Enable support for GPIOs (General-purpose Input/Output) in U-Boot.
+	  GPIOs allow U-Boot to read the state of an input line (high or
+	  low) and set the state of an output line. This can be used to
+	  drive LEDs, control power to various system parts and read user
+	  input. GPIOs can be useful to enable a 'sign-of-life' LED,
+	  for example. Enable this option to build the drivers in
+	  drivers/gpio as part of an U-Boot build.
+
+if GPIO
 
 config DM_GPIO
 	bool "Enable Driver Model for GPIO drivers"
@@ -503,4 +515,4 @@ config NOMADIK_GPIO
 	  into a number of banks each with 32 GPIOs. The GPIOs for a device are
 	  defined in the device tree with one node for each bank.
 
-endmenu
+endif
-- 
2.32.0.605.g8dce9f2422-goog