From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Florian Fainelli <f.fainelli@gmail.com>
Cc: linux-kernel@vger.kernel.org,
Alexandre Belloni <alexandre.belloni@free-electrons.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Ulf Hansson <ulf.hansson@linaro.org>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
linux-pm <linux-pm@vger.kernel.org>,
Thibaud Cornic <thibaud_cornic@sigmadesigns.com>,
JB <jb_lescher@sigmadesigns.com>, Mason <slash.tmp@free.fr>,
Kevin Hilman <khilman@kernel.org>, Pavel Machek <pavel@ucw.cz>,
Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v3] PM / suspend: Export pm_suspend_target_state
Date: Tue, 18 Jul 2017 01:24:54 +0200 [thread overview]
Message-ID: <3384121.PEd7U8K5ps@aspire.rjw.lan> (raw)
In-Reply-To: <20170717221059.6523-1-f.fainelli@gmail.com>
On Monday, July 17, 2017 03:10:59 PM Florian Fainelli wrote:
> Have the core suspend/resume framework store the system-wide suspend
> state (suspend_state_t) we are about to enter, and expose it to drivers
> via pm_suspend_target_state in order to retrieve that. The state is
> assigned in suspend_devices_and_enter().
>
> This is useful for platform specific drivers that may need to take a
> slightly different suspend/resume path based on the system's
> suspend/resume state being entered.
>
> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
> ---
> Changes in v3:
>
> - just export pm_suspend_target_state without a helper function
>
> Changes in v2:
>
> - rename platform_suspend_target_state() -> suspend_target_state()
> - directly export the suspend_state_t value and assign it in
> suspend_devices_and_enter()
>
> include/linux/suspend.h | 1 +
> kernel/power/suspend.c | 4 ++++
> 2 files changed, 5 insertions(+)
>
> diff --git a/include/linux/suspend.h b/include/linux/suspend.h
> index 0b1cf32edfd7..2159f6841768 100644
> --- a/include/linux/suspend.h
> +++ b/include/linux/suspend.h
> @@ -427,6 +427,7 @@ extern int unregister_pm_notifier(struct notifier_block *nb);
> /* drivers/base/power/wakeup.c */
> extern bool events_check_enabled;
> extern unsigned int pm_wakeup_irq;
> +extern suspend_state_t pm_suspend_target_state;
>
> extern bool pm_wakeup_pending(void);
> extern void pm_system_wakeup(void);
> diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
> index 3ecf275d7e44..1aecdaf22ab5 100644
> --- a/kernel/power/suspend.c
> +++ b/kernel/power/suspend.c
> @@ -47,6 +47,8 @@ const char *mem_sleep_states[PM_SUSPEND_MAX];
>
> suspend_state_t mem_sleep_current = PM_SUSPEND_FREEZE;
> static suspend_state_t mem_sleep_default = PM_SUSPEND_MEM;
> +suspend_state_t pm_suspend_target_state;
> +EXPORT_SYMBOL_GPL(pm_suspend_target_state);
>
> unsigned int pm_suspend_global_flags;
> EXPORT_SYMBOL_GPL(pm_suspend_global_flags);
> @@ -456,6 +458,8 @@ int suspend_devices_and_enter(suspend_state_t state)
> if (!sleep_state_supported(state))
> return -ENOSYS;
>
> + pm_suspend_target_state = state;
> +
> error = platform_suspend_begin(state);
> if (error)
> goto Close;
>
And please clear pm_suspend_target_state before returning from
suspend_devices_and_enter().
Thanks,
Rafael
next prev parent reply other threads:[~2017-07-17 23:32 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20170622085102.mpk7vxodpgxtrlfd@piout.net>
2017-06-23 1:08 ` [RFC 0/2] PM / suspend: Add platform_suspend_target_state() Florian Fainelli
2017-06-23 1:08 ` [RFC 1/2] " Florian Fainelli
2017-06-29 23:00 ` Rafael J. Wysocki
2017-07-12 18:08 ` Florian Fainelli
2017-07-14 22:16 ` Rafael J. Wysocki
2017-07-15 6:28 ` Pavel Machek
2017-07-15 12:17 ` Rafael J. Wysocki
2017-07-15 16:46 ` Pavel Machek
2017-07-15 17:20 ` Florian Fainelli
2017-07-15 18:33 ` Alexandre Belloni
2017-07-06 3:18 ` Pavel Machek
2017-07-16 13:41 ` Alexandre Belloni
2017-07-16 15:35 ` Florian Fainelli
2017-07-15 23:24 ` Rafael J. Wysocki
2017-07-15 23:34 ` Mason
2017-07-15 23:38 ` Rafael J. Wysocki
2017-07-16 2:36 ` Florian Fainelli
2017-07-16 10:22 ` Rafael J. Wysocki
2017-07-16 13:38 ` Alexandre Belloni
2017-07-16 18:24 ` Pavel Machek
2017-07-16 15:41 ` Florian Fainelli
2017-07-15 23:29 ` Rafael J. Wysocki
2017-07-06 3:17 ` Pavel Machek
2017-07-16 10:28 ` Rafael J. Wysocki
2017-07-16 18:22 ` Pavel Machek
2017-06-23 1:08 ` [RFC 2/2] soc: bcm: brcmstb: PM: Implement target_state callback Florian Fainelli
2017-06-29 23:04 ` Rafael J. Wysocki
2017-07-16 2:36 ` [PATCH 0/2] PM / suspend: Add platform_suspend_target_state() Florian Fainelli
2017-07-16 2:36 ` [PATCH 1/2] " Florian Fainelli
2017-07-06 3:18 ` Pavel Machek
2017-07-16 15:41 ` Florian Fainelli
2017-07-16 10:30 ` Rafael J. Wysocki
2017-07-16 2:36 ` [PATCH 2/2] soc: bcm: brcmstb: PM: Implement target_state callback Florian Fainelli
2017-07-17 20:06 ` [PATCH v2] PM / suspend: Add suspend_target_state() Florian Fainelli
2017-07-17 20:16 ` Pavel Machek
2017-07-17 21:03 ` Rafael J. Wysocki
2017-07-17 21:21 ` Florian Fainelli
2017-07-20 8:03 ` Pavel Machek
2017-07-17 22:10 ` [PATCH v3] PM / suspend: Export pm_suspend_target_state Florian Fainelli
2017-07-17 23:24 ` Rafael J. Wysocki [this message]
2017-07-18 0:19 ` [PATCH v4] " Florian Fainelli
2017-07-24 20:55 ` Rafael J. Wysocki
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