Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754025AbcKCGQ0 (ORCPT ); Thu, 3 Nov 2016 02:16:26 -0400 Received: from mail-pf0-f196.google.com ([209.85.192.196]:35408 "EHLO mail-pf0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752089AbcKCGQX (ORCPT ); Thu, 3 Nov 2016 02:16:23 -0400 From: Lin Huang To: myungjoo.ham@samsung.com Cc: cw00.choi@samsung.com, dianders@chromium.org, linux-rockchip@lists.infradead.org, linux-pm@vger.kernel.org, dbasehore@chromium.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Lin Huang Subject: [PATCH v2 1/2] PM/devfreq: add suspend frequency support Date: Thu, 3 Nov 2016 14:16:09 +0800 Message-Id: <1478153770-8433-2-git-send-email-hl@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1478153770-8433-1-git-send-email-hl@rock-chips.com> References: <1478153770-8433-1-git-send-email-hl@rock-chips.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3115 Lines: 92 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 --- 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) { -- 1.9.1