linux/drivers/net/ethernet/adi/Kconfig
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

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#
# Blackfin device configuration
#
config NET_BFIN
bool "Blackfin devices"
depends on BF516 || BF518 || BF526 || BF527 || BF536 || BF537
---help---
If you have a network (Ethernet) card belonging to this class, say Y.
If unsure, say Y.
Note that the answer to this question doesn't directly affect the
kernel: saying N will just cause the configurator to skip all
the remaining Blackfin card questions. If you say Y, you will be
asked for your specific card in the following questions.
if NET_BFIN
config BFIN_MAC
tristate "Blackfin on-chip MAC support"
depends on (BF516 || BF518 || BF526 || BF527 || BF536 || BF537)
select CRC32
select MII
select PHYLIB
select BFIN_MAC_USE_L1 if DMA_UNCACHED_NONE
---help---
This is the driver for Blackfin on-chip mac device. Say Y if you want
it compiled into the kernel. This driver is also available as a
module ( = code which can be inserted in and removed from the running
kernel whenever you want). The module will be called bfin_mac.
config BFIN_MAC_USE_L1
bool "Use L1 memory for rx/tx packets"
depends on BFIN_MAC && (BF527 || BF537)
default y
---help---
To get maximum network performance, you should use L1 memory as rx/tx
buffers. Say N here if you want to reserve L1 memory for other uses.
config BFIN_TX_DESC_NUM
int "Number of transmit buffer packets"
depends on BFIN_MAC
range 6 10 if BFIN_MAC_USE_L1
range 10 100
default "10"
---help---
Set the number of buffer packets used in driver.
config BFIN_RX_DESC_NUM
int "Number of receive buffer packets"
depends on BFIN_MAC
range 20 64
default "20"
---help---
Set the number of buffer packets used in driver.
config BFIN_MAC_USE_HWSTAMP
bool "Use IEEE 1588 hwstamp"
depends on BFIN_MAC && BF518
imply PTP_1588_CLOCK
default y
---help---
To support the IEEE 1588 Precision Time Protocol (PTP), select y here
endif # NET_BFIN