Re: [PATCH v5 3/5] opp: Add dev_pm_opp_find_level_floor()

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On 9/27/2023 12:44 PM, Viresh Kumar wrote:
On 07-09-23, 11:30, Krishna chaitanya chundru wrote:

$Subject should have OPP instead of opp. Past history of framework can be seen
for this.

I will change the subject in the next patch series.

- KC

During initialization of some drivers, need to vote for max level.

Adding dev_pm_opp_find_level_floor() for searching a lesser match or
operating on OPP in the order of decreasing level.

Signed-off-by: Krishna chaitanya chundru <quic_krichai@xxxxxxxxxxx>
---
  drivers/opp/core.c     | 25 +++++++++++++++++++++++++
  include/linux/pm_opp.h |  9 +++++++++
  2 files changed, 34 insertions(+)

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 919cc53..6d4d226 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 freq
freq ?

+ * @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
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 91f87d7..baea92f 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -144,6 +144,9 @@ struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev,
  struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev,
  					      unsigned int *level);
+struct dev_pm_opp *dev_pm_opp_find_level_floor(struct device *dev,
+					       unsigned long *level);
+
  struct dev_pm_opp *dev_pm_opp_find_bw_ceil(struct device *dev,
  					   unsigned int *bw, int index);
@@ -314,6 +317,12 @@ static inline struct dev_pm_opp *dev_pm_opp_find_bw_ceil(struct device *dev,
  	return ERR_PTR(-EOPNOTSUPP);
  }
+static inline struct dev_pm_opp *dev_pm_opp_find_level_floor(struct device *dev,
Why add between two bw related functions ?

+							     unsigned long *level)
+{
+	return ERR_PTR(-EOPNOTSUPP);
+}
+
  static inline struct dev_pm_opp *dev_pm_opp_find_bw_floor(struct device *dev,
  					unsigned int *bw, int index)
  {
Fixed all this and applied. Thanks.





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