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PM / devfreq: icc: Add suspend/resume APIs

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Absence of traffic is guaranteed when the device sitting behind a devbw
device is suspended. In such cases, it is a waste of power to make non-zero
bandwidth votes or to scale the devbw device. So, provide APIs to
suspend/resume the devbw device as needed.

Change-Id: Id58072aec7a9710eb917f248d9b9bd08d3a1ec6a
Signed-off-by: Saravana Kannan <skannan@codeaurora.org>
[avajid@codeaurora.org: renamed devbw to icc and made minor styling change]
Signed-off-by: Amir Vajid <avajid@codeaurora.org>
This commit is contained in:
Saravana Kannan 2019-01-16 18:20:08 -08:00 committed by Amir Vajid
parent 2fa5f6f0b3
commit 74a06b81ab
3 changed files with 40 additions and 9 deletions
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15
drivers/devfreq/bimc-bwmon.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2014, 2019, The Linux Foundation. All rights reserved.
* Copyright (c) 2014-2015, 2019, The Linux Foundation. All rights reserved.
*/
#define pr_fmt(fmt) "bimc-bwmon: " fmt
@ -232,7 +232,6 @@ static void stop_bw_hwmon(struct bw_hwmon *hw)
{
struct bwmon *m = to_bwmon(hw);
disable_irq(m->irq);
free_irq(m->irq, m);
mon_disable(m);
mon_irq_disable(m);
@ -244,7 +243,7 @@ static int suspend_bw_hwmon(struct bw_hwmon *hw)
{
struct bwmon *m = to_bwmon(hw);
disable_irq(m->irq);
free_irq(m->irq, m);
mon_disable(m);
mon_irq_disable(m);
mon_irq_clear(m);
@ -255,11 +254,19 @@ static int suspend_bw_hwmon(struct bw_hwmon *hw)
static int resume_bw_hwmon(struct bw_hwmon *hw)
{
struct bwmon *m = to_bwmon(hw);
int ret;
mon_clear(m);
mon_irq_enable(m);
mon_enable(m);
enable_irq(m->irq);
ret = request_threaded_irq(m->irq, NULL, bwmon_intr_handler,
IRQF_ONESHOT | IRQF_SHARED,
dev_name(m->dev), m);
if (ret < 0) {
dev_err(m->dev, "Unable to register interrupt handler! (%d)\n",
ret);
return ret;
}
return 0;
}

24
drivers/devfreq/devfreq_icc.c
View File

@ -163,11 +163,6 @@ int devfreq_add_icc(struct device *dev)
return 0;
}
static int devfreq_icc_probe(struct platform_device *pdev)
{
return devfreq_add_icc(&pdev->dev);
}
int devfreq_remove_icc(struct device *dev)
{
struct dev_data *d = dev_get_drvdata(dev);
@ -177,6 +172,25 @@ int devfreq_remove_icc(struct device *dev)
return 0;
}
int devfreq_suspend_icc(struct device *dev)
{
struct dev_data *d = dev_get_drvdata(dev);
return devfreq_suspend_device(d->df);
}
int devfreq_resume_icc(struct device *dev)
{
struct dev_data *d = dev_get_drvdata(dev);
return devfreq_resume_device(d->df);
}
static int devfreq_icc_probe(struct platform_device *pdev)
{
return devfreq_add_icc(&pdev->dev);
}
static int devfreq_icc_remove(struct platform_device *pdev)
{
return devfreq_remove_icc(&pdev->dev);

10
include/soc/qcom/devfreq_icc.h
View File

@ -11,6 +11,8 @@
#ifdef CONFIG_QCOM_DEVFREQ_ICC
int devfreq_add_icc(struct device *dev);
int devfreq_remove_icc(struct device *dev);
int devfreq_suspend_icc(struct device *dev);
int devfreq_resume_icc(struct device *dev);
#else
static inline int devfreq_add_icc(struct device *dev)
{
@ -20,6 +22,14 @@ static inline int devfreq_remove_icc(struct device *dev)
{
return 0;
}
static inline int devfreq_suspend_icc(struct device *dev)
{
return 0;
}
static inline int devfreq_resume_icc(struct device *dev)
{
return 0;
}
#endif
#endif /* _DEVFREQ_ICC_H */