This driver includes the following two files directly: - mt7621.h - ralink_regs.h Compilation for its related platform properly works because its real path is included in 'arch/mips/ralink/Platform' as cflags. This driver depends on RALINK but also is enabled for COMPILE_TEST where nothing about its platform is known and this directly included files are not found at all breaking compilation. Fix this problem adding include search path for ralink in ralink phy directory Makefile. Fixes: d87da32372a0 ("phy: ralink: Add PHY driver for MT7621 PCIe PHY") Signed-off-by: Sergio Paracuellos <sergio.paracuellos@xxxxxxxxx> --- drivers/phy/ralink/Makefile | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/phy/ralink/Makefile b/drivers/phy/ralink/Makefile index cda2a4a7ca5e..c8f9adba0d82 100644 --- a/drivers/phy/ralink/Makefile +++ b/drivers/phy/ralink/Makefile @@ -1,3 +1,6 @@ # SPDX-License-Identifier: GPL-2.0-only + +ccflags-y += -I$(srctree)/arch/mips/include/asm/mach-ralink + obj-$(CONFIG_PHY_MT7621_PCI) += phy-mt7621-pci.o obj-$(CONFIG_PHY_RALINK_USB) += phy-ralink-usb.o -- 2.25.1