1. 根目录:
2. drivers
3. ptp
4. Makefile

#
# Makefile for PTP 1588 clock support.
#

ptp-y					:= ptp_clock.o ptp_chardev.o ptp_sysfs.o
obj-$(CONFIG_PTP_1588_CLOCK)		+= ptp.o
obj-$(CONFIG_PTP_1588_CLOCK_IXP46X)	+= ptp_ixp46x.o
obj-$(CONFIG_PTP_1588_CLOCK_PCH)	+= ptp_pch.o