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| author | Nicolas Pitre <nicolas.pitre@linaro.org> | 2016-11-11 00:10:07 -0500 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-11-16 09:26:34 +0100 |
| commit | d1cbfd771ce8297fa11e89f315392de6056a2181 (patch) | |
| tree | 3ad9ec4f2acce6888ab96faaf06cc4e0f5fb7a76 /drivers/net/ethernet/sfc | |
| parent | 32ce5ac867bf4ba8350a751216d087f574a38133 (diff) | |
| download | blackbird-op-linux-d1cbfd771ce8297fa11e89f315392de6056a2181.tar.gz blackbird-op-linux-d1cbfd771ce8297fa11e89f315392de6056a2181.zip | |
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>
Diffstat (limited to 'drivers/net/ethernet/sfc')
| -rw-r--r-- | drivers/net/ethernet/sfc/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/sfc/Kconfig b/drivers/net/ethernet/sfc/Kconfig index 4dd92b7b80f4..83f4766a1da0 100644 --- a/drivers/net/ethernet/sfc/Kconfig +++ b/drivers/net/ethernet/sfc/Kconfig @@ -5,7 +5,7 @@ config SFC select CRC32 select I2C select I2C_ALGOBIT - select PTP_1588_CLOCK + imply PTP_1588_CLOCK ---help--- This driver supports 10/40-gigabit Ethernet cards based on the Solarflare SFC4000, SFC9000-family and SFC9100-family |
