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################################################################################
#
# 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) $(MAKE) -C $(LINUX_DIR)/tools \
$(GPIO_MAKE_OPTS) \
gpio
endef
define GPIO_INSTALL_TARGET_CMDS
$(TARGET_MAKE_ENV) $(MAKE) -C $(LINUX_DIR)/tools \
$(GPIO_MAKE_OPTS) \
DESTDIR=$(TARGET_DIR) \
gpio_install
endef
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