Following error showed up: drivers/phy/renesas/phy-rcar-gen3-usb2.o: In function `rcar_gen3_phy_usb2_probe': /work/tools/linux/drivers/phy/renesas/phy-rcar-gen3-usb2.c:444: undefined reference to `of_usb_get_dr_mode_by_phy' Makefile:993: recipe for target 'vmlinux' failed make: *** [vmlinux] Error 1 with CONFIG_USB_SUPPORT=n Add dependency on USB_SUPPORT and select USB_COMMON to make sure that of_usb_get_dr_mode_by_phy() is available. Signed-off-by: Vladimir Murzin <vladimir.murzin@xxxxxxx> --- drivers/phy/renesas/Kconfig | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/phy/renesas/Kconfig b/drivers/phy/renesas/Kconfig index cb09245..c845fac 100644 --- a/drivers/phy/renesas/Kconfig +++ b/drivers/phy/renesas/Kconfig @@ -12,7 +12,9 @@ config PHY_RCAR_GEN3_USB2 tristate "Renesas R-Car generation 3 USB 2.0 PHY driver" depends on ARCH_RENESAS depends on EXTCON + depends on USB_SUPPORT select GENERIC_PHY + select USB_COMMON help Support for USB 2.0 PHY found on Renesas R-Car generation 3 SoCs. -- 1.9.1
