linux/drivers/net/ethernet/intel
Nicolas Pitre d1cbfd771c ptp_clock: Allow for it to be optional
In order to break the hard dependency between the PTP clock subsystem and
ethernet drivers capable of being clock providers, this patch provides
simple PTP stub functions to allow linkage of those drivers into the
kernel even when the PTP subsystem is configured out. Drivers must be
ready to accept NULL from ptp_clock_register() in that case.

And to make it possible for PTP to be configured out, the select statement
in those driver's Kconfig menu entries is converted to the new "imply"
statement. This way the PTP subsystem may have Kconfig dependencies of
its own, such as POSIX_TIMERS, without having to make those ethernet
drivers unavailable if POSIX timers are cconfigured out. And when support
for POSIX timers is selected again then the default config option for PTP
clock support will automatically be adjusted accordingly.

The pch_gbe driver is a bit special as it relies on extra code in
drivers/ptp/ptp_pch.c. Therefore we let the make process descend into
drivers/ptp/ even if PTP_1588_CLOCK is unselected.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Acked-by: Edward Cree <ecree@solarflare.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: John Stultz <john.stultz@linaro.org>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Cc: Paul Bolle <pebolle@tiscali.nl>
Cc: linux-kbuild@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: Michal Marek <mmarek@suse.com>
Link: http://lkml.kernel.org/r/1478841010-28605-4-git-send-email-nicolas.pitre@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-11-16 09:26:34 +01:00
..
e1000 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-04-09 17:41:41 -04:00
e1000e ptp_clock: future-proofing drivers against PTP subsystem becoming optional 2016-09-22 02:18:33 -04:00
fm10k fm10k: wrap long line for alloc_workqueue 2016-10-02 23:17:38 -07:00
i40e i40e: avoid NULL pointer dereference and recursive errors on early PCI error 2016-10-03 23:26:54 -04:00
i40evf i40evf: support queue-specific settings for interrupt moderation 2016-09-24 22:50:23 -07:00
igb igb: restore PPS signal on igb_ptp_reset 2016-09-27 19:00:52 -07:00
igbvf igbvf: bump version to igbvf-2.4.0 2016-09-27 19:00:52 -07:00
ixgb drivers/net: get rid of unnecessary initializations in .get_drvinfo() 2015-10-16 00:24:10 -07:00
ixgbe Merge branch '10GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue 2016-09-24 08:21:49 -04:00
ixgbevf ixgbevf: add spinlocks for MTU change calls 2016-09-23 00:16:34 -07:00
e100.c e100: Release skb when DMA mapping is failed in e100_xmit_prepare 2015-08-18 14:06:05 -07:00
Kconfig ptp_clock: Allow for it to be optional 2016-11-16 09:26:34 +01:00
Makefile