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authorManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>2023-07-20 08:40:52 +0300
committerViresh Kumar <viresh.kumar@linaro.org>2023-07-21 12:38:27 +0300
commit142e17c1c2b48e3fb4f024e62ab6dee18f268694 (patch)
tree7a106123a9417aceab9869d77840b426fdbcbd27 /drivers/opp
parent754833b3194c30dad5af0145e25192a8e29521ab (diff)
downloadlinux-142e17c1c2b48e3fb4f024e62ab6dee18f268694.tar.xz
OPP: Introduce dev_pm_opp_find_freq_{ceil/floor}_indexed() APIs
In the case of devices with multiple clocks, drivers need to specify the clock index for the OPP framework to find the OPP corresponding to the floor/ceil of the supplied frequency. So let's introduce the two new APIs accepting the clock index as an argument. These APIs use the exising _find_key_ceil() helper by supplying the clock index to it. Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> [ Viresh: Rearranged definitions in pm_opp.h ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/opp')
-rw-r--r--drivers/opp/core.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 3f46e499d615..cb4f47b341f9 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -659,6 +659,34 @@ struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil);
/**
+ * dev_pm_opp_find_freq_ceil_indexed() - Search for a rounded ceil freq for the
+ * clock corresponding to the index
+ * @dev: Device for which we do this operation
+ * @freq: Start frequency
+ * @index: Clock index
+ *
+ * Search for the matching ceil *available* OPP for the clock corresponding to
+ * the specified index from a starting freq for a device.
+ *
+ * Return: matching *opp and refreshes *freq 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_freq_ceil_indexed(struct device *dev, unsigned long *freq,
+ u32 index)
+{
+ return _find_key_ceil(dev, freq, index, true, _read_freq, NULL);
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil_indexed);
+
+/**
* dev_pm_opp_find_freq_floor() - Search for a rounded floor freq
* @dev: device for which we do this operation
* @freq: Start frequency
@@ -684,6 +712,34 @@ struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor);
/**
+ * dev_pm_opp_find_freq_floor_indexed() - Search for a rounded floor freq for the
+ * clock corresponding to the index
+ * @dev: Device for which we do this operation
+ * @freq: Start frequency
+ * @index: Clock index
+ *
+ * Search for the matching floor *available* OPP for the clock corresponding to
+ * the specified index from a starting freq for a device.
+ *
+ * Return: matching *opp and refreshes *freq 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_freq_floor_indexed(struct device *dev, unsigned long *freq,
+ u32 index)
+{
+ return _find_key_floor(dev, freq, index, true, _read_freq, NULL);
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor_indexed);
+
+/**
* dev_pm_opp_find_level_exact() - search for an exact level
* @dev: device for which we do this operation
* @level: level to search for