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path: root/drivers/devfreq
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Diffstat (limited to 'drivers/devfreq')
-rw-r--r--drivers/devfreq/devfreq.c42
-rw-r--r--drivers/devfreq/exynos4_bus.c14
2 files changed, 48 insertions, 8 deletions
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index a129a7b6bfd..70c31d43fff 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -83,6 +83,7 @@ int update_devfreq(struct devfreq *devfreq)
{
unsigned long freq;
int err = 0;
+ u32 flags = 0;
if (!mutex_is_locked(&devfreq->lock)) {
WARN(true, "devfreq->lock must be locked by the caller.\n");
@@ -94,7 +95,24 @@ int update_devfreq(struct devfreq *devfreq)
if (err)
return err;
- err = devfreq->profile->target(devfreq->dev.parent, &freq);
+ /*
+ * Adjust the freuqency with user freq and QoS.
+ *
+ * List from the highest proiority
+ * max_freq (probably called by thermal when it's too hot)
+ * min_freq
+ */
+
+ if (devfreq->min_freq && freq < devfreq->min_freq) {
+ freq = devfreq->min_freq;
+ flags &= ~DEVFREQ_FLAG_LEAST_UPPER_BOUND; /* Use GLB */
+ }
+ if (devfreq->max_freq && freq > devfreq->max_freq) {
+ freq = devfreq->max_freq;
+ flags |= DEVFREQ_FLAG_LEAST_UPPER_BOUND; /* Use LUB */
+ }
+
+ err = devfreq->profile->target(devfreq->dev.parent, &freq, flags);
if (err)
return err;
@@ -625,14 +643,30 @@ module_exit(devfreq_exit);
* freq value given to target callback.
* @dev The devfreq user device. (parent of devfreq)
* @freq The frequency given to target function
+ * @flags Flags handed from devfreq framework.
*
*/
-struct opp *devfreq_recommended_opp(struct device *dev, unsigned long *freq)
+struct opp *devfreq_recommended_opp(struct device *dev, unsigned long *freq,
+ u32 flags)
{
- struct opp *opp = opp_find_freq_ceil(dev, freq);
+ struct opp *opp;
- if (opp == ERR_PTR(-ENODEV))
+ if (flags & DEVFREQ_FLAG_LEAST_UPPER_BOUND) {
+ /* The freq is an upper bound. opp should be lower */
opp = opp_find_freq_floor(dev, freq);
+
+ /* If not available, use the closest opp */
+ if (opp == ERR_PTR(-ENODEV))
+ opp = opp_find_freq_ceil(dev, freq);
+ } else {
+ /* The freq is an lower bound. opp should be higher */
+ opp = opp_find_freq_ceil(dev, freq);
+
+ /* If not available, use the closest opp */
+ if (opp == ERR_PTR(-ENODEV))
+ opp = opp_find_freq_floor(dev, freq);
+ }
+
return opp;
}
diff --git a/drivers/devfreq/exynos4_bus.c b/drivers/devfreq/exynos4_bus.c
index 590d6865e38..1a361e99965 100644
--- a/drivers/devfreq/exynos4_bus.c
+++ b/drivers/devfreq/exynos4_bus.c
@@ -619,13 +619,19 @@ static int exynos4_bus_setvolt(struct busfreq_data *data, struct opp *opp,
return err;
}
-static int exynos4_bus_target(struct device *dev, unsigned long *_freq)
+static int exynos4_bus_target(struct device *dev, unsigned long *_freq,
+ u32 flags)
{
int err = 0;
- struct busfreq_data *data = dev_get_drvdata(dev);
- struct opp *opp = devfreq_recommended_opp(dev, _freq);
- unsigned long old_freq = opp_get_freq(data->curr_opp);
+ struct platform_device *pdev = container_of(dev, struct platform_device,
+ dev);
+ struct busfreq_data *data = platform_get_drvdata(pdev);
+ struct opp *opp = devfreq_recommended_opp(dev, _freq, flags);
unsigned long freq = opp_get_freq(opp);
+ unsigned long old_freq = opp_get_freq(data->curr_opp);
+
+ if (IS_ERR(opp))
+ return PTR_ERR(opp);
if (old_freq == freq)
return 0;