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PM / QoS: Restore DEV_PM_QOS_MIN/MAX_FREQUENCY

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Support for adding per-device frequency limits was removed in
commit 2aac8bdf7a ("PM: QoS: Drop frequency QoS types from device PM QoS")
after cpufreq switched to use a new "freq_constraints" construct.

Restore support for per-device freq limits but base this upon
freq_constraints. This is primarily meant to be used by the devfreq
subsystem.

This removes the "static" marking on freq_qos_apply but does not export
it for modules.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Tested-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Leonard Crestez
2019-11-26 17:17:13 +02:00
committed by Rafael J. Wysocki
parent 342035f66c
commit 36a8015f89
3 changed files with 82 additions and 7 deletions
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4
kernel/power/qos.c
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@@ -714,8 +714,10 @@ s32 freq_qos_read_value(struct freq_constraints *qos,
* @req: Constraint request to apply.
* @action: Action to perform (add/update/remove).
* @value: Value to assign to the QoS request.
*
* This is only meant to be called from inside pm_qos, not drivers.
*/
static int freq_qos_apply(struct freq_qos_request *req,
int freq_qos_apply(struct freq_qos_request *req,
enum pm_qos_req_action action, s32 value)
{
int ret;