of_usb_get_dr_mode_by_phy is implemented in usb/common/common.c. So the PHY_RCAR_GEN3_USB2 must depend on USB_SUPPORT/USB_COMMON.
LD vmlinux.o MODPOST vmlinux.o .../phy-rcar-gen3-usb2.o: In function `rcar_gen3_phy_usb2_probe': ...: undefined reference to `of_usb_get_dr_mode_by_phy' make: *** [vmlinux] Error 1 Signed-off-by: Wang Dongsheng <[email protected]> --- 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. -- 2.7.4
