Add minimum CPU frequency as PM QoS parameter.
Signed-off-by: Antti P Miettinen <amiettinen@xxxxxxxxxx>
---
include/linux/pm_qos.h | 3 +++
kernel/power/qos.c | 17 ++++++++++++++++-
2 files changed, 19 insertions(+), 1 deletions(-)
diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h
index 5ac91d8..54a0d00 100644
--- a/include/linux/pm_qos.h
+++ b/include/linux/pm_qos.h
@@ -14,8 +14,10 @@ enum {
PM_QOS_CPU_DMA_LATENCY,
PM_QOS_NETWORK_LATENCY,
PM_QOS_NETWORK_THROUGHPUT,
+ PM_QOS_CPU_FREQ_MIN,
/* insert new class ID */
+
PM_QOS_NUM_CLASSES,
};
@@ -25,6 +27,7 @@ enum {
#define PM_QOS_NETWORK_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
#define PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE 0
#define PM_QOS_DEV_LAT_DEFAULT_VALUE 0
+#define PM_QOS_CPU_FREQ_MIN_DEFAULT_VALUE 0
struct pm_qos_request {
struct plist_node node;
diff --git a/kernel/power/qos.c b/kernel/power/qos.c
index d6d6dbd..07d761a 100644
--- a/kernel/power/qos.c
+++ b/kernel/power/qos.c
@@ -101,11 +101,26 @@ static struct pm_qos_object network_throughput_pm_qos = {
};
+static BLOCKING_NOTIFIER_HEAD(cpu_freq_min_notifier);
+static struct pm_qos_constraints cpu_freq_min_constraints = {
+ .list = PLIST_HEAD_INIT(cpu_freq_min_constraints.list),
+ .target_value = PM_QOS_CPU_FREQ_MIN_DEFAULT_VALUE,
+ .default_value = PM_QOS_CPU_FREQ_MIN_DEFAULT_VALUE,
+ .type = PM_QOS_MAX,
+ .notifiers = &cpu_freq_min_notifier,
+};
+static struct pm_qos_object cpu_freq_min_pm_qos = {
+ .constraints = &cpu_freq_min_constraints,
+ .name = "cpu_freq_min",
+};
+
+
static struct pm_qos_object *pm_qos_array[] = {
&null_pm_qos,
&cpu_dma_pm_qos,
&network_lat_pm_qos,
- &network_throughput_pm_qos
+ &network_throughput_pm_qos,
+ &cpu_freq_min_pm_qos,
};
static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf,
--
1.7.4.1
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