diff options
| author | Jean Pihet <j-pihet@ti.com> | 2011-08-25 15:35:41 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2011-08-25 15:35:41 +0200 |
| commit | 91ff4cb803df6de9114351b9f2f0f39f397ee03e (patch) | |
| tree | eb24c7df28d0f93557ac1d9e7d72a79fc3556b97 /drivers/base/power/main.c | |
| parent | abe98ec2d86279fe821c9051003a0abc43444f15 (diff) | |
PM QoS: Implement per-device PM QoS constraints
Implement the per-device PM QoS constraints by creating a device
PM QoS API, which calls the PM QoS constraints management core code.
The per-device latency constraints data strctures are stored
in the device dev_pm_info struct.
The device PM code calls the init and destroy of the per-device constraints
data struct in order to support the dynamic insertion and removal of the
devices in the system.
To minimize the data usage by the per-device constraints, the data struct
is only allocated at the first call to dev_pm_qos_add_request.
The data is later free'd when the device is removed from the system.
A global mutex protects the constraints users from the data being
allocated and free'd.
Signed-off-by: Jean Pihet <j-pihet@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'drivers/base/power/main.c')
| -rw-r--r-- | drivers/base/power/main.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index a85459126bc..956443f8625 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -22,6 +22,7 @@ #include <linux/mutex.h> #include <linux/pm.h> #include <linux/pm_runtime.h> +#include <linux/pm_qos.h> #include <linux/resume-trace.h> #include <linux/interrupt.h> #include <linux/sched.h> @@ -97,6 +98,7 @@ void device_pm_add(struct device *dev) dev_name(dev->parent)); list_add_tail(&dev->power.entry, &dpm_list); mutex_unlock(&dpm_list_mtx); + dev_pm_qos_constraints_init(dev); } /** @@ -107,6 +109,7 @@ void device_pm_remove(struct device *dev) { pr_debug("PM: Removing info for %s:%s\n", dev->bus ? dev->bus->name : "No Bus", dev_name(dev)); + dev_pm_qos_constraints_destroy(dev); complete_all(&dev->power.completion); mutex_lock(&dpm_list_mtx); list_del_init(&dev->power.entry); |