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d1cbfd771c
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>
41 lines
1.0 KiB
Plaintext
41 lines
1.0 KiB
Plaintext
#
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# Mellanox driver configuration
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#
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config MLX4_EN
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tristate "Mellanox Technologies 1/10/40Gbit Ethernet support"
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depends on MAY_USE_DEVLINK
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depends on PCI
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select MLX4_CORE
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imply PTP_1588_CLOCK
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---help---
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This driver supports Mellanox Technologies ConnectX Ethernet
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devices.
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config MLX4_EN_DCB
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bool "Data Center Bridging (DCB) Support"
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default y
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depends on MLX4_EN && DCB
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---help---
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Say Y here if you want to use Data Center Bridging (DCB) in the
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driver.
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If set to N, will not be able to configure QoS and ratelimit attributes.
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This flag is depended on the kernel's DCB support.
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If unsure, set to Y
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config MLX4_CORE
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tristate
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depends on PCI
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default n
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config MLX4_DEBUG
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bool "Verbose debugging output" if (MLX4_CORE && EXPERT)
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depends on MLX4_CORE
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default y
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---help---
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This option causes debugging code to be compiled into the
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mlx4_core driver. The output can be turned on via the
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debug_level module parameter (which can also be set after
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the driver is loaded through sysfs).
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