Without gpiolib, this driver fails to link: arm-linux-gnueabi-ld: drivers/hid/hid-mcp2221.o: in function `mcp2221_probe': hid-mcp2221.c:(.text+0x1b0): undefined reference to `devm_gpiochip_add_data' arm-linux-gnueabi-ld: drivers/hid/hid-mcp2221.o: in function `mcp_gpio_get': hid-mcp2221.c:(.text+0x30c): undefined reference to `gpiochip_get_data' Fixes: 328de1c519c5 ("HID: mcp2221: add GPIO functionality support") Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> --- drivers/hid/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig index 008bf44bc2c3..d54e7ae80de5 100644 --- a/drivers/hid/Kconfig +++ b/drivers/hid/Kconfig @@ -1155,6 +1155,7 @@ config HID_ALPS config HID_MCP2221 tristate "Microchip MCP2221 HID USB-to-I2C/SMbus host support" depends on USB_HID && I2C + depends on GPIOLIB ---help--- Provides I2C and SMBUS host adapter functionality over USB-HID through MCP2221 device. -- 2.26.0