buildroot

################################################################################

#

# gpio

#

################################################################################

​

LINUX_TOOLS += gpio

​

GPIO_MAKE_OPTS = $(LINUX_MAKE_FLAGS)

​

define GPIO_BUILD_CMDS

    $(Q)if ! grep install $(LINUX_DIR)/tools/gpio/Makefile >/dev/null 2>&1 ; then \

        echo "Your kernel version is too old and does not have the gpio tools." ; \

        echo "At least kernel 4.8 must be used." ; \

        exit 1 ; \

    fi

​

    $(TARGET_MAKE_ENV) $(MAKE1) -C $(LINUX_DIR)/tools \

        $(GPIO_MAKE_OPTS) \

        gpio

endef

​

define GPIO_INSTALL_TARGET_CMDS

    $(TARGET_MAKE_ENV) $(MAKE1) -C $(LINUX_DIR)/tools \

        $(GPIO_MAKE_OPTS) \

        DESTDIR=$(TARGET_DIR) \

        gpio_install

endef