Function prototype or declaration at include/linux/gpio/driver.h, line 229 References: drivers/gpio/gpio-bcm-kona.c, line 502 drivers/gpio/gpio-dwapb.c, line 246 drivers/gpio/gpio-em.c, line 118 drivers/gpio/gpio-etraxfs.c, line 333 drivers/gpio/gpio-tegra.c, line 359 drivers/gpio/gpio-thunderx.c, line 381 drivers/gpio/gpio-thunderx.c, line 394 drivers/gpio/gpio-vr41xx.c, line 153 drivers/gpio/gpio-xgene-sb.c, line 166 drivers/gpio/gpiolib-acpi.c, line 291 drivers/gpio/gpiolib-acpi.c, line 365 drivers/gpio/gpiolib-sysfs.c, line 198 drivers/gpio/gpiolib-sysfs.c, line 216 drivers/gpio/gpiolib.c, line 1697 drivers/gpio/gpiolib.c, line 2845 drivers/gpio/gpiolib.c, line 2859 drivers/hid/hid-cp2112.c, line 1212 drivers/hid/hid-cp2112.c, line 1380 drivers/pinctrl/mediatek/pinctrl-mtk-common.c, line 887 drivers/pinctrl/pinctrl-st.c, line 1301 drivers/pinctrl/samsung/pinctrl-exynos.c, line 204 drivers/pinctrl/stm32/pinctrl-stm32.c, line 265 drivers/pinctrl/sunxi/pinctrl-sunxi.c, line 827 include/linux/gpio.h, line 220 include/linux/gpio/driver.h, line 229