| From: |
| Tony Lindgren <tony@atomide.com> |
| To: |
| "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> |
| Subject: |
| [PATCH 0/4] Minimal generic wakeirq helpers |
| Date: |
| Thu, 5 Mar 2015 16:34:05 -0800 |
| Message-ID: |
| <1425602049-2674-1-git-send-email-tony@atomide.com> |
| Cc: |
| Andreas Fenkart <afenkart@gmail.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Felipe Balbi <balbi@ti.com>, Huiquan Zhong <huiquan.zhong@intel.com>, Kevin Hilman <khilman@kernel.org>, NeilBrown <neilb@suse.de>, Mika Westerberg <mika.westerberg@linux.intel.com>, Nishanth Menon <nm@ti.com>, Peter Hurley <peter@hurleysoftware.com>, Sebastian Andrzej Siewior <bigeasy@linutronix.de>, Ulf Hansson <ulf.hansson@linaro.org>, Thomas Gleixner <tglx@linutronix.de>, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, linux-omap@vger.kernel.org |
| Archive‑link: | |
Article |
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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