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-rw-r--r--drivers/opp/core.c120
1 files changed, 120 insertions, 0 deletions
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 6725ff27c35e..48606f52759d 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -729,6 +729,126 @@ struct dev_pm_opp *dev_pm_opp_find_freq_ceil_by_volt(struct device *dev,
}
EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil_by_volt);
+/**
+ * dev_pm_opp_find_bw_ceil() - Search for a rounded ceil bandwidth
+ * @dev: device for which we do this operation
+ * @freq: start bandwidth
+ * @index: which bandwidth to compare, in case of OPPs with several values
+ *
+ * Search for the matching floor *available* OPP from a starting bandwidth
+ * for a device.
+ *
+ * Return: matching *opp and refreshes *bw accordingly, else returns
+ * ERR_PTR in case of error and should be handled using IS_ERR. Error return
+ * values can be:
+ * EINVAL: for bad pointer
+ * ERANGE: no match found for search
+ * ENODEV: if device not found in list of registered devices
+ *
+ * The callers are required to call dev_pm_opp_put() for the returned OPP after
+ * use.
+ */
+struct dev_pm_opp *dev_pm_opp_find_bw_ceil(struct device *dev,
+ unsigned int *bw, int index)
+{
+ struct opp_table *opp_table;
+ struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
+
+ if (!dev || !bw) {
+ dev_err(dev, "%s: Invalid argument bw=%p\n", __func__, bw);
+ return ERR_PTR(-EINVAL);
+ }
+
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table))
+ return ERR_CAST(opp_table);
+
+ if (index >= opp_table->path_count)
+ return ERR_PTR(-EINVAL);
+
+ mutex_lock(&opp_table->lock);
+
+ list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
+ if (temp_opp->available && temp_opp->bandwidth) {
+ if (temp_opp->bandwidth[index].peak >= *bw) {
+ opp = temp_opp;
+ *bw = opp->bandwidth[index].peak;
+
+ /* Increment the reference count of OPP */
+ dev_pm_opp_get(opp);
+ break;
+ }
+ }
+ }
+
+ mutex_unlock(&opp_table->lock);
+ dev_pm_opp_put_opp_table(opp_table);
+
+ return opp;
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_find_bw_ceil);
+
+/**
+ * dev_pm_opp_find_bw_floor() - Search for a rounded floor bandwidth
+ * @dev: device for which we do this operation
+ * @freq: start bandwidth
+ * @index: which bandwidth to compare, in case of OPPs with several values
+ *
+ * Search for the matching floor *available* OPP from a starting bandwidth
+ * for a device.
+ *
+ * Return: matching *opp and refreshes *bw accordingly, else returns
+ * ERR_PTR in case of error and should be handled using IS_ERR. Error return
+ * values can be:
+ * EINVAL: for bad pointer
+ * ERANGE: no match found for search
+ * ENODEV: if device not found in list of registered devices
+ *
+ * The callers are required to call dev_pm_opp_put() for the returned OPP after
+ * use.
+ */
+struct dev_pm_opp *dev_pm_opp_find_bw_floor(struct device *dev,
+ unsigned int *bw, int index)
+{
+ struct opp_table *opp_table;
+ struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
+
+ if (!dev || !bw) {
+ dev_err(dev, "%s: Invalid argument bw=%p\n", __func__, bw);
+ return ERR_PTR(-EINVAL);
+ }
+
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table))
+ return ERR_CAST(opp_table);
+
+ if (index >= opp_table->path_count)
+ return ERR_PTR(-EINVAL);
+
+ mutex_lock(&opp_table->lock);
+
+ list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
+ if (temp_opp->available && temp_opp->bandwidth) {
+ /* go to the next node, before choosing prev */
+ if (temp_opp->bandwidth[index].peak > *bw)
+ break;
+ opp = temp_opp;
+ }
+ }
+
+ /* Increment the reference count of OPP */
+ if (!IS_ERR(opp))
+ dev_pm_opp_get(opp);
+ mutex_unlock(&opp_table->lock);
+ dev_pm_opp_put_opp_table(opp_table);
+
+ if (!IS_ERR(opp))
+ *bw = opp->bandwidth[index].peak;
+
+ return opp;
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_find_bw_floor);
+
static int _set_opp_voltage(struct device *dev, struct regulator *reg,
struct dev_pm_opp_supply *supply)
{