Extern or forward variable declaration at include/linux/gpio/driver.h, line 15 References: arch/arm/mach-mvebu/pm-board.c, line 94 drivers/gpio/gpio-brcmstb.c, line 419 drivers/gpio/gpio-lpc32xx.c, line 492 drivers/gpio/gpio-mt7621.c, line 195 drivers/gpio/gpio-pxa.c, line 333 drivers/gpio/gpio-rcar.c, line 448 drivers/gpio/gpio-tegra186.c, line 311 drivers/gpio/gpiolib-of.c, line 86 drivers/gpio/gpiolib-of.c, line 94 drivers/gpio/gpiolib-of.c, line 100 drivers/gpio/gpiolib-of.c, line 242 drivers/gpio/gpiolib-of.c, line 584 drivers/gpio/gpiolib-of.c, line 800 drivers/gpio/gpiolib-of.c, line 926 drivers/gpu/drm/bridge/ti-sn65dsi86.c, line 1067 drivers/of/unittest.c, line 385 drivers/of/unittest.c, line 541 drivers/of/unittest.c, line 998 drivers/of/unittest.c, line 1075 drivers/pci/controller/dwc/pci-dra7xx.c, line 630 drivers/phy/allwinner/phy-sun4i-usb.c, line 647 drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c, line 1868 drivers/pinctrl/pinctrl-equilibrium.c, line 830 drivers/pinctrl/pinctrl-microchip-sgpio.c, line 492 drivers/pinctrl/pinctrl-oxnas.c, line 1198 drivers/pinctrl/qcom/pinctrl-spmi-gpio.c, line 741 drivers/pinctrl/qcom/pinctrl-spmi-mpp.c, line 613 drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c, line 523 drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c, line 518 drivers/pinctrl/renesas/pinctrl-rza1.c, line 1189 drivers/pinctrl/renesas/pinctrl-rza2.c, line 239 drivers/pinctrl/stm32/pinctrl-stm32.c, line 1224 drivers/pinctrl/sunxi/pinctrl-sunxi.c, line 893 include/linux/gpio/driver.h, line 15 include/linux/gpio/driver.h, line 470 sound/soc/fsl/imx-card.c, line 485 sound/soc/fsl/imx-rpmsg.c, line 38 sound/soc/generic/audio-graph-card.c, line 128 sound/soc/rockchip/rk3288_hdmi_analog.c, line 176