From: Lukasz Luba <l.luba@partner.samsung.com> To: linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org Cc: tjakobi@math.uni-bielefeld.de, myungjoo.ham@samsung.com, kyungmin.park@samsung.com, cw00.choi@samsung.com, rjw@rjwysocki.net, len.brown@intel.com, pavel@ucw.cz, gregkh@linuxfoundation.org, keescook@chromium.org, anton@enomsg.org, ccross@android.com, tony.luck@intel.com, robh+dt@kernel.org, mark.rutland@arm.com, kgene@kernel.org, krzk@kernel.org, m.szyprowski@samsung.com, b.zolnierkie@samsung.com, Lukasz Luba <l.luba@partner.samsung.com> Subject: [PATCH v2 3/5] devfreq: add devfreq_suspend/resume() functions Date: Mon, 3 Dec 2018 15:31:13 +0100 [thread overview] Message-ID: <1543847475-7600-4-git-send-email-l.luba@partner.samsung.com> (raw) In-Reply-To: <1543847475-7600-1-git-send-email-l.luba@partner.samsung.com> This patch adds implementation for global suspend/resume for devfreq framework. System suspend will next use these functions. The patch is based on earlier work by Tobias Jakobi. Suggested-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de> Suggested-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com> --- drivers/devfreq/devfreq.c | 42 ++++++++++++++++++++++++++++++++++++++++++ include/linux/devfreq.h | 6 ++++++ 2 files changed, 48 insertions(+) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 36bed24..7d60423 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -935,6 +935,48 @@ int devfreq_resume_device(struct devfreq *devfreq) EXPORT_SYMBOL(devfreq_resume_device); /** + * devfreq_suspend() - Suspend devfreq governors and devices + * + * Called during system wide Suspend/Hibernate cycles for suspending governors + * and devices preserving the state for resume. On some platforms the devfreq + * device must have precise state (frequency) after resume in order to provide + * fully operating setup. + */ +void devfreq_suspend(void) +{ + struct devfreq *devfreq; + int ret; + + mutex_lock(&devfreq_list_lock); + list_for_each_entry(devfreq, &devfreq_list, node) { + ret = devfreq_suspend_device(devfreq); + if (ret) + dev_warn(&devfreq->dev, "device suspend failed\n"); + } + mutex_unlock(&devfreq_list_lock); +} + +/** + * devfreq_resume() - Resume devfreq governors and devices + * + * Called during system wide Suspend/Hibernate cycle for resuming governors and + * devices that are suspended with devfreq_suspend(). + */ +void devfreq_resume(void) +{ + struct devfreq *devfreq; + int ret; + + mutex_lock(&devfreq_list_lock); + list_for_each_entry(devfreq, &devfreq_list, node) { + ret = devfreq_resume_device(devfreq); + if (ret) + dev_warn(&devfreq->dev, "device resume failed\n"); + } + mutex_unlock(&devfreq_list_lock); +} + +/** * devfreq_add_governor() - Add devfreq governor * @governor: the devfreq governor to be added */ diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h index d985199..fbffa74 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -205,6 +205,9 @@ extern void devm_devfreq_remove_device(struct device *dev, extern int devfreq_suspend_device(struct devfreq *devfreq); extern int devfreq_resume_device(struct devfreq *devfreq); +extern void devfreq_suspend(void); +extern void devfreq_resume(void); + /** * update_devfreq() - Reevaluate the device and configure frequency * @devfreq: the devfreq device @@ -331,6 +334,9 @@ static inline int devfreq_resume_device(struct devfreq *devfreq) return 0; } +static inline void devfreq_suspend(void) {} +static inline void devfreq_resume(void) {} + static inline struct dev_pm_opp *devfreq_recommended_opp(struct device *dev, unsigned long *freq, u32 flags) { -- 2.7.4
WARNING: multiple messages have this Message-ID (diff)
From: Lukasz Luba <l.luba@partner.samsung.com> To: linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org Cc: mark.rutland@arm.com, len.brown@intel.com, tony.luck@intel.com, keescook@chromium.org, cw00.choi@samsung.com, b.zolnierkie@samsung.com, gregkh@linuxfoundation.org, anton@enomsg.org, rjw@rjwysocki.net, robh+dt@kernel.org, Lukasz Luba <l.luba@partner.samsung.com>, tjakobi@math.uni-bielefeld.de, kyungmin.park@samsung.com, myungjoo.ham@samsung.com, kgene@kernel.org, pavel@ucw.cz, ccross@android.com, krzk@kernel.org, m.szyprowski@samsung.com Subject: [PATCH v2 3/5] devfreq: add devfreq_suspend/resume() functions Date: Mon, 3 Dec 2018 15:31:13 +0100 [thread overview] Message-ID: <1543847475-7600-4-git-send-email-l.luba@partner.samsung.com> (raw) In-Reply-To: <1543847475-7600-1-git-send-email-l.luba@partner.samsung.com> This patch adds implementation for global suspend/resume for devfreq framework. System suspend will next use these functions. The patch is based on earlier work by Tobias Jakobi. Suggested-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de> Suggested-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com> --- drivers/devfreq/devfreq.c | 42 ++++++++++++++++++++++++++++++++++++++++++ include/linux/devfreq.h | 6 ++++++ 2 files changed, 48 insertions(+) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 36bed24..7d60423 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -935,6 +935,48 @@ int devfreq_resume_device(struct devfreq *devfreq) EXPORT_SYMBOL(devfreq_resume_device); /** + * devfreq_suspend() - Suspend devfreq governors and devices + * + * Called during system wide Suspend/Hibernate cycles for suspending governors + * and devices preserving the state for resume. On some platforms the devfreq + * device must have precise state (frequency) after resume in order to provide + * fully operating setup. + */ +void devfreq_suspend(void) +{ + struct devfreq *devfreq; + int ret; + + mutex_lock(&devfreq_list_lock); + list_for_each_entry(devfreq, &devfreq_list, node) { + ret = devfreq_suspend_device(devfreq); + if (ret) + dev_warn(&devfreq->dev, "device suspend failed\n"); + } + mutex_unlock(&devfreq_list_lock); +} + +/** + * devfreq_resume() - Resume devfreq governors and devices + * + * Called during system wide Suspend/Hibernate cycle for resuming governors and + * devices that are suspended with devfreq_suspend(). + */ +void devfreq_resume(void) +{ + struct devfreq *devfreq; + int ret; + + mutex_lock(&devfreq_list_lock); + list_for_each_entry(devfreq, &devfreq_list, node) { + ret = devfreq_resume_device(devfreq); + if (ret) + dev_warn(&devfreq->dev, "device resume failed\n"); + } + mutex_unlock(&devfreq_list_lock); +} + +/** * devfreq_add_governor() - Add devfreq governor * @governor: the devfreq governor to be added */ diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h index d985199..fbffa74 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -205,6 +205,9 @@ extern void devm_devfreq_remove_device(struct device *dev, extern int devfreq_suspend_device(struct devfreq *devfreq); extern int devfreq_resume_device(struct devfreq *devfreq); +extern void devfreq_suspend(void); +extern void devfreq_resume(void); + /** * update_devfreq() - Reevaluate the device and configure frequency * @devfreq: the devfreq device @@ -331,6 +334,9 @@ static inline int devfreq_resume_device(struct devfreq *devfreq) return 0; } +static inline void devfreq_suspend(void) {} +static inline void devfreq_resume(void) {} + static inline struct dev_pm_opp *devfreq_recommended_opp(struct device *dev, unsigned long *freq, u32 flags) { -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2018-12-03 14:31 UTC|newest] Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <CGME20181203143127eucas1p2604fc066139a32fdffe996212b42b40e@eucas1p2.samsung.com> 2018-12-03 14:31 ` [PATCH v2 0/5] devfreq: handle suspend/resume Lukasz Luba 2018-12-03 14:31 ` Lukasz Luba [not found] ` <CGME20181203143129eucas1p2955b6becc60ee57110cbc52f6e4f60c5@eucas1p2.samsung.com> 2018-12-03 14:31 ` [PATCH v2 1/5] devfreq: refactor set_target frequency function Lukasz Luba 2018-12-03 14:31 ` Lukasz Luba 2018-12-04 4:39 ` Chanwoo Choi 2018-12-04 4:39 ` Chanwoo Choi 2018-12-04 5:43 ` Chanwoo Choi 2018-12-04 5:43 ` Chanwoo Choi 2018-12-04 9:36 ` Lukasz Luba 2018-12-04 9:36 ` Lukasz Luba [not found] ` <CGME20181203143131eucas1p217f22ac6d19682a54a57658a06980914@eucas1p2.samsung.com> 2018-12-03 14:31 ` [PATCH v2 2/5] devfreq: add support for suspend/resume of a devfreq device Lukasz Luba 2018-12-03 14:31 ` Lukasz Luba 2018-12-04 5:36 ` Chanwoo Choi 2018-12-04 5:36 ` Chanwoo Choi 2018-12-04 5:43 ` Chanwoo Choi 2018-12-04 5:43 ` Chanwoo Choi 2018-12-04 6:10 ` Chanwoo Choi 2018-12-04 6:10 ` Chanwoo Choi 2018-12-04 9:53 ` Lukasz Luba 2018-12-04 9:53 ` Lukasz Luba 2018-12-05 0:09 ` Chanwoo Choi 2018-12-05 0:09 ` Chanwoo Choi 2018-12-05 11:07 ` Lukasz Luba 2018-12-05 11:07 ` Lukasz Luba 2018-12-04 9:39 ` Lukasz Luba 2018-12-04 9:39 ` Lukasz Luba 2018-12-09 9:00 ` Pavel Machek 2018-12-09 9:00 ` Pavel Machek [not found] ` <CGME20181203143132eucas1p128c029a7c7461e1127924a08e4a71811@eucas1p1.samsung.com> 2018-12-03 14:31 ` Lukasz Luba [this message] 2018-12-03 14:31 ` [PATCH v2 3/5] devfreq: add devfreq_suspend/resume() functions Lukasz Luba 2018-12-04 6:19 ` Chanwoo Choi 2018-12-04 6:19 ` Chanwoo Choi 2018-12-04 9:44 ` Lukasz Luba 2018-12-04 9:44 ` Lukasz Luba [not found] ` <CGME20181203143134eucas1p1edd70b0f4dca115f6f154555d8829427@eucas1p1.samsung.com> 2018-12-03 14:31 ` [PATCH v2 4/5] drivers: power: suspend: call devfreq suspend/resume Lukasz Luba 2018-12-03 14:31 ` Lukasz Luba [not found] ` <CGME20181203143135eucas1p165fe6183ae90de7906f9683cb41ff4c1@eucas1p1.samsung.com> 2018-12-03 14:31 ` [PATCH v2 5/5] arm: dts: exynos4: opp-suspend in DMC and leftbus Lukasz Luba 2018-12-03 14:31 ` Lukasz Luba 2018-12-03 17:22 ` Krzysztof Kozlowski 2018-12-03 17:22 ` Krzysztof Kozlowski 2018-12-03 17:48 ` Lukasz Luba 2018-12-03 17:48 ` Lukasz Luba
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