From: hl@rock-chips•com (hl)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v2 1/2] PM/devfreq: add suspend frequency support
Date: Thu, 3 Nov 2016 14:36:28 +0800 [thread overview]
Message-ID: <581ADAEC.5020701@rock-chips.com> (raw)
In-Reply-To: <1478153770-8433-2-git-send-email-hl@rock-chips.com>
Hi All,
Miss something in this patch, just ignored it, sorry about that.
On 2016?11?03? 14:16, Lin Huang wrote:
> Add suspend frequency support and if needed set it to
> the frequency obtained from the suspend opp (can be defined
> using opp-v2 bindings and is optional).
>
> Change-Id: Iaa0d3848d63d9ce03f65ea76f263e4685a4c295e
> Signed-off-by: Lin Huang <hl@rock-chips•com>
> ---
> Changes in v2:
> - use update_devfreq() instead devfreq_update_status()
>
> drivers/devfreq/devfreq.c | 17 ++++++++++++++++-
> include/linux/devfreq.h | 9 +++++++++
> 2 files changed, 25 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
> index bf3ea76..0a76282 100644
> --- a/drivers/devfreq/devfreq.c
> +++ b/drivers/devfreq/devfreq.c
> @@ -364,7 +364,10 @@ void devfreq_monitor_suspend(struct devfreq *devfreq)
> return;
> }
>
> - devfreq_update_status(devfreq, devfreq->previous_freq);
> + if (devfreq->suspend_freq)
> + update_devfreq(devfreq, devfreq->suspend_freq);
> + else
> + devfreq_update_status(devfreq, devfreq->previous_freq);
> devfreq->stop_polling = true;
> mutex_unlock(&devfreq->lock);
> cancel_delayed_work_sync(&devfreq->work);
> @@ -1251,6 +1254,18 @@ struct dev_pm_opp *devfreq_recommended_opp(struct device *dev,
> }
> EXPORT_SYMBOL(devfreq_recommended_opp);
>
> +void devfreq_opp_get_suspend_opp(struct device *dev, struct devfreq *devfreq)
> +{
> + struct dev_pm_opp *suspend_opp;
> +
> + rcu_read_lock();
> + suspend_opp = dev_pm_opp_get_suspend_opp(dev);
> + if (suspend_opp)
> + devfreq->suspend_freq = dev_pm_opp_get_freq(suspend_opp);
> + rcu_read_unlock();
> +}
> +EXPORT_SYMBOL(devfreq_opp_get_suspend_opp);
> +
> /**
> * devfreq_register_opp_notifier() - Helper function to get devfreq notified
> * for any changes in the OPP availability
> diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h
> index 2de4e2e..c785ad9 100644
> --- a/include/linux/devfreq.h
> +++ b/include/linux/devfreq.h
> @@ -88,6 +88,7 @@ struct devfreq_dev_status {
> */
> struct devfreq_dev_profile {
> unsigned long initial_freq;
> + unsigned long suspend_freq;
> unsigned int polling_ms;
>
> int (*target)(struct device *dev, unsigned long *freq, u32 flags);
> @@ -172,6 +173,7 @@ struct devfreq {
> struct delayed_work work;
>
> unsigned long previous_freq;
> + unsigned long suspend_freq;
> struct devfreq_dev_status last_status;
>
> void *data; /* private data for governors */
> @@ -214,6 +216,8 @@ extern void devm_devfreq_remove_device(struct device *dev,
> /* Helper functions for devfreq user device driver with OPP. */
> extern struct dev_pm_opp *devfreq_recommended_opp(struct device *dev,
> unsigned long *freq, u32 flags);
> +extern void devfreq_opp_get_suspend_opp(struct device *dev,
> + struct devfreq *devfreq);
> extern int devfreq_register_opp_notifier(struct device *dev,
> struct devfreq *devfreq);
> extern int devfreq_unregister_opp_notifier(struct device *dev,
> @@ -348,6 +352,11 @@ static inline struct dev_pm_opp *devfreq_recommended_opp(struct device *dev,
> return ERR_PTR(-EINVAL);
> }
>
> +static inline void devfreq_opp_get_suspend_opp(struct device *dev,
> + struct devfreq *devfreq)
> +{
> +}
> +
> static inline int devfreq_register_opp_notifier(struct device *dev,
> struct devfreq *devfreq)
> {
--
Lin Huang
next prev parent reply other threads:[~2016-11-03 6:36 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-03 6:16 [PATCH v2 0/2] set specific ddr frequency when stop ddr dvfs Lin Huang
2016-11-03 6:16 ` [PATCH v2 1/2] PM/devfreq: add suspend frequency support Lin Huang
2016-11-03 6:36 ` hl [this message]
2016-11-03 14:41 ` kbuild test robot
2016-11-03 6:16 ` [PATCH v2 2/2] PM/devfreq: rk3399: set specific ddr frequency when stop ddr dvfs Lin Huang
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