From: Pavel Machek <pavel@ucw.cz>
To: Claudiu.Beznea@microchip.com
Cc: len.brown@intel.com, alexandre.belloni@bootlin.com,
linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
rjw@rjwysocki.net, lgirdwood@gmail.com,
Ludovic.Desroches@microchip.com, broonie@kernel.org,
linux@armlinux.org.uk, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 1/3] PM / Suspend: Add support to check if platform's power is off in suspend
Date: Wed, 9 Jan 2019 15:14:17 +0100 [thread overview]
Message-ID: <20190109141417.GA8529@amd> (raw)
In-Reply-To: <1546944944-13911-2-git-send-email-claudiu.beznea@microchip.com>
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Hi!
> Add support to check if platform's power will be cut off in suspend.
> This will help drivers shared by multiple platforms to take only the
> necessary actions while suspending/resuming (some platform may not need
> to save/restore all the registers if platforms remains powered while
> suspended). In this way suspend/resume time could be improved.
>
> Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
> ---
> include/linux/suspend.h | 6 ++++++
> kernel/power/suspend.c | 13 +++++++++++++
> 2 files changed, 19 insertions(+)
>
> diff --git a/include/linux/suspend.h b/include/linux/suspend.h
> index 3f529ad9a9d2..21f19b167fe2 100644
> --- a/include/linux/suspend.h
> +++ b/include/linux/suspend.h
> @@ -173,6 +173,9 @@ static inline void dpm_save_failed_step(enum suspend_stat_step step)
> * Called by the PM core if the suspending of devices fails.
> * This callback is optional and should only be implemented by platforms
> * which require special recovery actions in that situation.
> + *
> + * @off_in_suspend: Returns wether the platform's power will be cut off at
wether -- spelling?
> @@ -185,6 +188,7 @@ struct platform_suspend_ops {
> bool (*suspend_again)(void);
> void (*end)(void);
> void (*recover)(void);
> + bool (*off_in_suspend)(suspend_state_t state);
> };
Dunno, should it be per-regulator? SoCs commonly have more than one
power supply, with some of them off during suspend...
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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next prev parent reply other threads:[~2019-01-09 14:14 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-08 10:56 [PATCH v2 0/3] add support for power off check in suspend Claudiu.Beznea
2019-01-08 10:56 ` [PATCH v2 1/3] PM / Suspend: Add support to check if platform's power is off " Claudiu.Beznea
2019-01-09 14:14 ` Pavel Machek [this message]
2019-01-10 10:24 ` Claudiu.Beznea
2019-01-08 10:56 ` [PATCH v2 2/3] regulator: core: add helper to check if regulator is disabled " Claudiu.Beznea
2019-01-09 16:57 ` Mark Brown
2019-01-10 10:24 ` Claudiu.Beznea
2019-01-11 12:39 ` Mark Brown
2019-01-11 14:08 ` Claudiu.Beznea
2019-01-14 22:53 ` Mark Brown
2019-01-15 9:19 ` Claudiu.Beznea
2019-01-08 10:56 ` [PATCH v2 3/3] ARM: at91: pm: add support for .off_in_suspend Claudiu.Beznea
2019-01-08 11:46 ` [PATCH v2 0/3] add support for power off check in suspend Rafael J. Wysocki
2019-01-08 14:07 ` Claudiu.Beznea
2019-01-28 9:50 ` Claudiu.Beznea
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