At present SPL does not have its own option. But these features can
increase SPL code size. Adjust the Kconfig and Makefile so that
separate a SPL option can be selected.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: NTom Rini <trini@konsulko.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

The menuconfig for drivers are getting more and more cluttered
and unreadable because too many entries are displayed in a single
flat menu.  Use hierarchic menu for each category.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
[trini: Update to apply again in a few places, drop USB hunk]
Signed-off-by: NTom Rini <trini@konsulko.com>

Add a simple driver which allows use of LEDs attached to GPIOs. The linux
device tree binding is used.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Add a simple uclass for LEDs, so that these can be controlled by the device
tree and activated when needed. LEDs are referred to by their label.

This implementation requires a driver for each type of LED (e.g GPIO, I2C).
Signed-off-by: NSimon Glass <sjg@chromium.org>