From: shawn.guo@freescale.com (Shawn Guo)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 6/6] arm/imx6q: add suspend/resume support
Date: Thu, 8 Sep 2011 14:23:02 +0800 [thread overview]
Message-ID: <20110908062301.GK8148@S2100-06.ap.freescale.net> (raw)
In-Reply-To: <CAGsJ_4x6cUWey=jCxY-LaazxB=WCRAH0tFsKdpJHgy=iMFkjuw@mail.gmail.com>
On Wed, Sep 07, 2011 at 09:50:44PM +0800, Barry Song wrote:
> > +
> > +static int imx6q_pm_enter(suspend_state_t state)
> > +{
> > + ? ? ? switch (state) {
> > + ? ? ? case PM_SUSPEND_MEM:
> > + ? ? ? ? ? ? ? imx_local_timer_pre_suspend();
> > + ? ? ? ? ? ? ? imx_gpc_pre_suspend();
> > + ? ? ? ? ? ? ? outer_flush_all();
> > + ? ? ? ? ? ? ? outer_disable();
> > + ? ? ? ? ? ? ? imx_set_cpu_jump(0, v7_cpu_resume);
> > +
> > + ? ? ? ? ? ? ? /* Zzz ... */
> > + ? ? ? ? ? ? ? cpu_suspend(0, imx6q_suspend_finish);
> > +
> > + ? ? ? ? ? ? ? imx_smp_prepare();
> > + ? ? ? ? ? ? ? l2x0_of_init(0, ~0UL);
>
> it is pretty clear and good. i think we can refine
> arch/arm/mach-prima2/pm.c to the way you are suspending/resuming l2.
> on prima2, l2 will totally lose power in suspend cycle. i remember you
> once said imx6q will retain l2 in suspend cycle?
>
Yes, if you lose L2 power in suspend, it's the easiest way for you to
resume L2.
For my case which retains L2, I actually do not want to call this
function which will invalidate L2. But since we still have problem
to use rmk's generic suspend/resume updates (ARM: pm: add L2 cache
cleaning for suspend), we have to flush the entire L2 on imx6q for now.
Regards,
Shawn
> > + ? ? ? ? ? ? ? imx_gpc_post_resume();
> > + ? ? ? ? ? ? ? imx_local_timer_post_resume();
> > + ? ? ? ? ? ? ? break;
> > + ? ? ? default:
> > + ? ? ? ? ? ? ? return -EINVAL;
> > + ? ? ? }
> > +
> > + ? ? ? return 0;
> > +}
> thanks
> barry
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2011-09-08 6:23 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-06 9:58 [PATCH 0/6] add initial imx6q support Shawn Guo
2011-09-06 9:58 ` [PATCH 1/6] arm/imx6q: add device tree source Shawn Guo
2011-09-06 18:31 ` Arnd Bergmann
2011-09-07 11:16 ` Shawn Guo
2011-09-06 9:58 ` [PATCH 2/6] arm/imx6q: add core definitions and low-level debug uart Shawn Guo
2011-09-06 18:39 ` Arnd Bergmann
2011-09-07 8:50 ` Shawn Guo
2011-09-06 20:25 ` Uwe Kleine-König
2011-09-07 11:00 ` Shawn Guo
2011-09-07 12:36 ` Uwe Kleine-König
2011-09-07 14:23 ` Russell King - ARM Linux
2011-09-07 15:36 ` Nicolas Pitre
2011-09-08 14:56 ` Arnd Bergmann
2011-09-09 17:28 ` Tony Lindgren
2011-09-12 2:30 ` Shawn Guo
2011-09-12 7:41 ` Uwe Kleine-König
2011-09-12 8:43 ` Shawn Guo
2011-09-12 8:44 ` Sascha Hauer
2011-09-12 11:36 ` Shawn Guo
2011-09-12 14:14 ` Russell King - ARM Linux
2011-09-17 11:59 ` Russell King - ARM Linux
2011-09-15 1:24 ` Shawn Guo
2011-09-06 9:58 ` [PATCH 3/6] arm/imx6q: add core drivers clock, gpc, mmdc and src Shawn Guo
2011-09-06 19:14 ` Arnd Bergmann
2011-09-07 6:05 ` Shawn Guo
2011-09-07 7:56 ` Arnd Bergmann
2011-09-12 16:12 ` Shawn Guo
2011-09-12 19:40 ` Grant Likely
2011-09-12 20:28 ` Arnd Bergmann
2011-09-12 21:04 ` Grant Likely
2011-09-13 0:07 ` Shawn Guo
2011-09-07 12:43 ` Barry Song
2011-09-08 6:48 ` Shawn Guo
2011-09-11 2:28 ` Barry Song
2011-09-12 19:16 ` Grant Likely
2011-09-12 9:46 ` Sascha Hauer
2011-09-12 11:49 ` Shawn Guo
2011-09-12 12:36 ` Uwe Kleine-König
2011-09-12 12:40 ` Arnd Bergmann
2011-09-12 14:27 ` Shawn Guo
2011-09-15 1:26 ` Shawn Guo
2011-09-06 9:58 ` [PATCH 4/6] arm/imx6q: add smp and cpu hotplug support Shawn Guo
2011-09-06 18:53 ` Arnd Bergmann
2011-09-07 4:41 ` Shawn Guo
2011-09-07 5:08 ` Shilimkar, Santosh
2011-09-07 7:46 ` Shawn Guo
2011-09-06 9:58 ` [PATCH 5/6] arm/imx6q: add device tree machine support Shawn Guo
2011-09-06 18:55 ` Arnd Bergmann
2011-09-07 3:07 ` Shawn Guo
2011-09-07 7:26 ` Arnd Bergmann
2011-09-06 9:58 ` [PATCH 6/6] arm/imx6q: add suspend/resume support Shawn Guo
2011-09-06 18:56 ` Arnd Bergmann
2011-09-07 13:50 ` Barry Song
2011-09-08 6:23 ` Shawn Guo [this message]
2011-09-08 7:47 ` Russell King - ARM Linux
2011-09-08 15:22 ` Shawn Guo
2011-09-08 16:24 ` Russell King - ARM Linux
2011-09-08 17:09 ` Lorenzo Pieralisi
2011-09-09 7:40 ` Shawn Guo
2011-09-09 6:31 ` Barry Song
2011-09-09 7:32 ` Shawn Guo
2011-09-09 8:15 ` Russell King - ARM Linux
2011-09-09 10:15 ` Shawn Guo
2011-09-09 18:47 ` Russell King - ARM Linux
2011-09-06 18:28 ` [PATCH 0/6] add initial imx6q support Arnd Bergmann
2011-09-06 19:42 ` Uwe Kleine-König
2011-09-07 2:55 ` Shawn Guo
2011-09-07 9:39 ` Arnd Bergmann
2011-09-07 2:51 ` Shawn Guo
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