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authorKrishna chaitanya chundru <quic_krichai@quicinc.com>2023-09-07 09:00:31 +0300
committerViresh Kumar <viresh.kumar@linaro.org>2023-10-06 10:07:34 +0300
commita0242c81bb759ef03184be8eddcc7d5bdf36cc16 (patch)
tree4d68383a98dbd8d6f35a73163f101aabb932cc22 /drivers/opp
parent0025ff64ffcf6bd6ece5484e7818401f77bf115f (diff)
downloadlinux-a0242c81bb759ef03184be8eddcc7d5bdf36cc16.tar.xz
OPP: Add dev_pm_opp_find_level_floor()
Add dev_pm_opp_find_level_floor(), as is done for frequency and bandwidth. Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com> [ Viresh: Updated commit log and rearranged code ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/opp')
-rw-r--r--drivers/opp/core.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 8978e94c9ca1..cdac46698021 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -814,6 +814,31 @@ struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev,
EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_ceil);
/**
+ * dev_pm_opp_find_level_floor() - Search for a rounded floor level
+ * @dev: device for which we do this operation
+ * @level: Start level
+ *
+ * Search for the matching floor *available* OPP from a starting level
+ * for a device.
+ *
+ * Return: matching *opp and refreshes *level 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_level_floor(struct device *dev,
+ unsigned long *level)
+{
+ return _find_key_floor(dev, level, 0, true, _read_level, NULL);
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_floor);
+
+/**
* dev_pm_opp_find_bw_ceil() - Search for a rounded ceil bandwidth
* @dev: device for which we do this operation
* @bw: start bandwidth