linux-kernel - [PATCH 0/4] Minimal generic wakeirq helpers

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Message-Id: <1425602049-2674-1-git-send-email-tony@atomide.com>
Date:	Thu,  5 Mar 2015 16:34:05 -0800
From:	Tony Lindgren <tony@...mide.com>
To:	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Cc:	Andreas Fenkart <afenkart@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Felipe Balbi <balbi@...com>,
	Huiquan Zhong <huiquan.zhong@...el.com>,
	Kevin Hilman <khilman@...nel.org>, NeilBrown <neilb@...e.de>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Nishanth Menon <nm@...com>,
	Peter Hurley <peter@...leysoftware.com>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
	linux-omap@...r.kernel.org
Subject: [PATCH 0/4] Minimal generic wakeirq helpers

Hi all,

Here's an attempt to have Linux generic wakeirq helpers. This allows
removing most of the related code from drivers. Currently the drivers
all do it in a slightly different way. And may have issues with interrupt
re-entrancy and getting the suspend/resume vs runtime_pm wake handling
right.

This is for wakerirqs that are available for some devices in addition
to the regular device interrupts. The seprate always-on wake-up interrupt
controller is needed to allow devices and the SoC to enter deeper idle
states and still be able to wake-up to events.

Some of this was discussed in the kernel/irq context a while back [1].
But it seems that this can be done in drivers/base/power. If somebody has
hardware that needs to replay lost device interrupts based on the
wake-up interrupts, then additional kernel/irq changes will be needed.

This set fixes up three drivers to use the generic wakeirq. Note that
eventually the wakeirq handling for these drivers might end up in a
bus specific code and could be hidden away from the drivers.

Regards,

Tony

[1] https://lkml.org/lkml/2014/11/13/458

Tony Lindgren (4):
  PM / Wakeirq: Add minimal device wakeirq helper functions
  serial: 8250_omap: Move wake-up interrupt to generic wakeirq
  serial: omap: Switch wake-up interrupt to generic wakeirq
  mmc: omap_hsmmc: Change wake-up interrupt to use generic wakeirq

 arch/arm/mach-omap2/Kconfig         |   1 +
 drivers/base/power/Makefile         |   1 +
 drivers/base/power/wakeirq.c        | 201 ++++++++++++++++++++++++++++++++++++
 drivers/mmc/host/omap_hsmmc.c       |  55 +++-------
 drivers/tty/serial/8250/8250_omap.c |  67 +++---------
 drivers/tty/serial/omap-serial.c    |  38 +++----
 include/linux/pm_wakeirq.h          |  69 +++++++++++++
 kernel/power/Kconfig                |   4 +
 8 files changed, 318 insertions(+), 118 deletions(-)
 create mode 100644 drivers/base/power/wakeirq.c
 create mode 100644 include/linux/pm_wakeirq.h

-- 
2.1.4

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