From: andrew@lunn•ch (Andrew Lunn)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 12/17] ARM: mvebu: Armada XP GP specific suspend/resume code
Date: Fri, 24 Oct 2014 16:51:19 +0200 [thread overview]
Message-ID: <20141024145119.GD3142@lunn.ch> (raw)
In-Reply-To: <20141024162824.67f9ce3d@free-electrons.com>
On Fri, Oct 24, 2014 at 04:28:24PM +0200, Thomas Petazzoni wrote:
> Dear Andrew Lunn,
>
> On Fri, 24 Oct 2014 16:20:44 +0200, Andrew Lunn wrote:
>
> > Does Marvell mandate this PIC and gpio interface? Or is a board
> > designer free to implement it some other way? It seems to me, this
> > should be considered specific to the Marvell reference design.
>
> They don't mandate this interface, it's really a board-specific
> decision, which is why I've split my implementation between:
>
> * SoC-specific code, in mach-mvebu/pm.c.
>
> * Board-specific code, in mach-mvebu/pm-board.c.
>
> > I'm wondering if this code should be a power driver, living in
> > drivers/power/reset/.
>
> I'm fine with that, but have you seen the *very* tight interaction
> between the SoC-specific code and the board-specific code? The problem
> is that the board-specific code needs to put the SDRAM into
> self-refresh *right* before shutting down the SoC, and all that while
> making sure the code doing both of these operations remains in the
> I-Cache, and does not touch any other location in memory (which has
> become inaccessible due to being in self-refresh mode).
>
> Look at the mvebu_armada_xp_gp_pm_enter() function: it takes two
> arguments, received from the SoC-level code. How to handle this thing
> with a driver in drivers/power/reset/ ?
It looks like reset drivers can register a notifier block, and you can
pass this notifier a void * parameter. So you should be able to pass
parameters. Nobody currently does this, so it might not work....
Andrew
next prev parent reply other threads:[~2014-10-24 14:51 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-24 11:59 [PATCH 00/17] Suspend to RAM support for Armada XP Thomas Petazzoni
2014-10-24 11:59 ` [PATCH 01/17] Documentation: dt-bindings: minimal documentation for MVEBU SDRAM controller Thomas Petazzoni
2014-11-03 17:05 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 02/17] ARM: mvebu: enable strex backoff delay Thomas Petazzoni
2014-11-03 17:08 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 03/17] irqchip: irq-armada-370-xp: use proper return value for ->set_affinity() Thomas Petazzoni
2014-11-03 17:20 ` Gregory CLEMENT
2014-11-07 4:09 ` Jason Cooper
2014-10-24 11:59 ` [PATCH 04/17] irqchip: irq-armada-370-xp: suspend/resume support Thomas Petazzoni
2014-11-03 17:38 ` Gregory CLEMENT
2014-11-13 16:32 ` Thomas Petazzoni
2014-10-24 11:59 ` [PATCH 05/17] clocksource: time-armada-370-xp: add " Thomas Petazzoni
2014-11-03 17:45 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 06/17] gpio: mvebu: " Thomas Petazzoni
2014-10-24 16:30 ` David Cohen
2014-10-24 20:45 ` Andrew Lunn
2014-10-27 5:27 ` Alexandre Courbot
2014-10-27 17:45 ` David Cohen
2014-10-31 7:00 ` Linus Walleij
2014-10-31 7:52 ` Gregory CLEMENT
2014-10-31 8:14 ` Thomas Petazzoni
2014-11-03 13:26 ` Linus Walleij
2014-11-03 13:29 ` Linus Walleij
2014-11-03 17:53 ` Gregory CLEMENT
2014-11-03 21:21 ` Thomas Petazzoni
2014-10-24 11:59 ` [PATCH 07/17] bus: mvebu-mbus: " Thomas Petazzoni
2014-11-03 18:08 ` Gregory CLEMENT
2014-11-03 21:20 ` Thomas Petazzoni
2014-10-24 11:59 ` [PATCH 08/17] bus: mvebu-mbus: provide a mechanism to save SDRAM window configuration Thomas Petazzoni
2014-11-04 9:17 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 09/17] clk: mvebu: add suspend/resume for gatable clocks Thomas Petazzoni
2014-11-04 9:32 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 10/17] ARM: mvebu: implement suspend/resume support for Armada XP Thomas Petazzoni
2014-11-04 10:00 ` Gregory CLEMENT
2014-11-13 17:00 ` Thomas Petazzoni
2014-10-24 11:59 ` [PATCH 11/17] ARM: mvebu: reserve the first 10 KB of each memory bank for suspend/resume Thomas Petazzoni
2014-11-04 10:09 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 12/17] ARM: mvebu: Armada XP GP specific suspend/resume code Thomas Petazzoni
2014-10-24 14:20 ` Andrew Lunn
2014-10-24 14:28 ` Thomas Petazzoni
2014-10-24 14:51 ` Andrew Lunn [this message]
2014-10-27 12:51 ` Thomas Petazzoni
2014-10-27 14:19 ` Andrew Lunn
2014-10-27 14:40 ` Thomas Petazzoni
2014-10-27 14:59 ` Andrew Lunn
2014-10-27 15:12 ` Thomas Petazzoni
2014-10-27 15:15 ` Andrew Lunn
2014-11-10 13:53 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 13/17] ARM: mvebu: make sure MMU is disabled in armada_370_xp_cpu_resume Thomas Petazzoni
2014-11-10 14:05 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 14/17] ARM: mvebu: synchronize secondary CPU clocks on resume Thomas Petazzoni
2014-11-10 14:12 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 15/17] ARM: mvebu: add suspend/resume DT information for Armada XP GP Thomas Petazzoni
2014-11-10 14:14 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 16/17] ARM: mvebu: adjust mbus controller description on Armada 370/XP Thomas Petazzoni
2014-11-10 14:15 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 17/17] ARM: mvebu: add SDRAM controller description for Armada XP Thomas Petazzoni
2014-11-10 14:25 ` Gregory CLEMENT
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