This file does not need <asm/gpio.h> so remove it. This file does
however need <linux/types.h> so add that in. This also shows that
arch/arm/mach-rockchip/rk3399/rk3399.c and board/lg/star/star.c were
indirectly getting <asm/gpio.h> from here, so add <asm/gpio.h> to them.

Signed-off-by: Tom Rini <trini@konsulko.com>

In some cases access to GPIOs is needed so early that DM
is not ready even nearly. These functions are exactly for
this case.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>

Sphinx expects Return: and not @return to indicate a return value.

find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

In space-constrained environments or before driver model is available, it
is sometimes necessary to set GPIO values. Add an SPL API for this, to
allow early board code to change GPIOs. The caller must provide the
register address, so that the drivers can be fairly generic.

This API can be implemented by GPIO drivers, behind a suitable guard,
like #ifdef CONFIG_SPL_BUILD.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>