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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2019-07-04 09:36:19 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-07-04 10:40:54 +0200 |
| commit | 2a79ea5ec53973c8711b54d33ace5c77659dc8f8 (patch) | |
| tree | bbc7ddc34862e341c417b570f1e0c9903ff19f81 /drivers/base/power | |
| parent | PM / QOS: Rename __dev_pm_qos_read_value() and dev_pm_qos_raw_read_value() (diff) | |
| download | linux-2a79ea5ec53973c8711b54d33ace5c77659dc8f8.tar.xz linux-2a79ea5ec53973c8711b54d33ace5c77659dc8f8.zip | |
PM / QOS: Pass request type to dev_pm_qos_read_value()
In order to allow dev_pm_qos_read_value() to read values for different
QoS requests, pass request type as a parameter to these routines.
For now, it only supports resume-latency request type but will be
extended to frequency limit (min/max) constraints later on.
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base/power')
| -rw-r--r-- | drivers/base/power/domain_governor.c | 2 | ||||
| -rw-r--r-- | drivers/base/power/qos.c | 17 |
2 files changed, 13 insertions, 6 deletions
diff --git a/drivers/base/power/domain_governor.c b/drivers/base/power/domain_governor.c index 20e56a5be01f..daa8c7689f7e 100644 --- a/drivers/base/power/domain_governor.c +++ b/drivers/base/power/domain_governor.c @@ -33,7 +33,7 @@ static int dev_update_qos_constraint(struct device *dev, void *data) * take its current PM QoS constraint (that's the only thing * known at this point anyway). */ - constraint_ns = dev_pm_qos_read_value(dev); + constraint_ns = dev_pm_qos_read_value(dev, DEV_PM_QOS_RESUME_LATENCY); constraint_ns *= NSEC_PER_USEC; } diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c index 7a0d197f0809..2461fed0efa0 100644 --- a/drivers/base/power/qos.c +++ b/drivers/base/power/qos.c @@ -105,18 +105,25 @@ s32 __dev_pm_qos_resume_latency(struct device *dev) /** * dev_pm_qos_read_value - Get PM QoS constraint for a given device (locked). * @dev: Device to get the PM QoS constraint value for. + * @type: QoS request type. */ -s32 dev_pm_qos_read_value(struct device *dev) +s32 dev_pm_qos_read_value(struct device *dev, enum dev_pm_qos_req_type type) { + struct dev_pm_qos *qos = dev->power.qos; unsigned long flags; s32 ret; spin_lock_irqsave(&dev->power.lock, flags); - if (IS_ERR_OR_NULL(dev->power.qos)) - ret = PM_QOS_RESUME_LATENCY_NO_CONSTRAINT; - else - ret = pm_qos_read_value(&dev->power.qos->resume_latency); + switch (type) { + case DEV_PM_QOS_RESUME_LATENCY: + ret = IS_ERR_OR_NULL(qos) ? PM_QOS_RESUME_LATENCY_NO_CONSTRAINT + : pm_qos_read_value(&qos->resume_latency); + break; + default: + WARN_ON(1); + ret = 0; + } spin_unlock_irqrestore(&dev->power.lock, flags); |