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From: Viresh Kumar <viresh.kumar@st.com>
To: <pavel@ucw.cz>, "Rafael J. Wysocki" <rjw@sisk.pl>, <len.brown@intel.com>
Cc: "linux-pm@lists.linux-foundation.org" 
	<linux-pm@lists.linux-foundation.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Shiraz HASHIM <shiraz.hashim@st.com>,
	Armando VISCONTI <armando.visconti@st.com>,
	Vipin KUMAR <vipin.kumar@st.com>,
	deepak sikri <deepak.sikri@st.com>,
	Vipul Kumar SAMAR <vipulkumar.samar@st.com>,
	Amit VIRDI <amit.virdi@st.com>,
	Rajeev KUMAR <rajeev-dlh.kumar@st.com>,
	Pratyush ANAND <pratyush.anand@st.com>,
	Mirko GARDI <mirko.gardi@st.com>,
	Vincenzo FRASCINO <Vincenzo.FRASCINO@st.com>,
	Bhupesh SHARMA <bhupesh.sharma@st.com>
Subject: Query: When will drv->poweroff() called
Date: Mon, 6 Feb 2012 11:25:12 +0530	[thread overview]
Message-ID: <4F2F6B40.6070308@st.com> (raw)


Hi Guys,

Sorry for asking this silly question, but i couldn't locate much
help for it in documentation, so asking it.

We were testing hibernation for SPEAr13xx SoC family, based on
ARM Cortex a9.

I observed that poweroff() callback of individual drivers are not
getting called at all, while we test hibernate.

I tried to go through the code to see what happened. It looked like
there should be call to hibernation_set_ops() for platforms that are
willing to get a call to poweroff() for their drivers. Otherwise
shutdown of the busses gets called, which is a completely different path.

There are many drivers today, that are registering poweroff() from dev_pm_ops
but are not doing bus specific shutdown stuff.

Even i tried to look for hibernation_set_ops() in kernel, and only acpi
code is calling it. I didn't understood how other ARM Sub-Arch's are handling
this.

Thanks in advance :)

-- 
viresh

             reply	other threads:[~2012-02-06  5:55 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-02-06  5:55 Viresh Kumar [this message]
2012-02-06 12:07 ` Query: When will drv->poweroff() called Rafael J. Wysocki
2012-02-07  4:19   ` Viresh Kumar
2012-02-16 15:16     ` viresh kumar

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