From: Alexandre Belloni <alexandre.belloni@free-electrons.com>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Pavel Machek <pavel@ucw.cz>,
Boris Brezillon <boris.brezillon@free-electrons.com>,
Nicolas Ferre <nicolas.ferre@atmel.com>,
linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: PM: knowing the system state in the device callback
Date: Mon, 16 Mar 2015 20:17:42 +0100 [thread overview]
Message-ID: <20150316191742.GI4560@piout.net> (raw)
Hi,
I'm trying to get rid of at91_suspend_entering_slow_clock() which is
exposing the platform suspend_state_t to the devices. From what I
understand, whenever suspend_state_t is PM_SUSPEND_MEM or
PM_SUSPEND_STANDBY, the pm_message_t passed to the device driver is
always PM_EVENT_SUSPEND.
The requirement is to know whether we are going to cut the master clock
and in that case, avoid calling enable_irq_wake() because we will not be
able to wakeup from the device.
Is there a better way to do that? Or should I implement a similar
function in the pm core (which I guess would already be there if
really needed)?
Regards,
--
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
next reply other threads:[~2015-03-16 19:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-16 19:17 Alexandre Belloni [this message]
2015-03-16 19:52 ` PM: knowing the system state in the device callback Boris Brezillon
2015-03-16 20:32 ` Sylvain Rochet
2015-03-17 8:38 ` Boris Brezillon
2015-03-17 10:46 ` Sylvain Rochet
2015-03-17 12:27 ` Gregory CLEMENT
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