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Message-Id: <142e17c1c2b48e3fb4f024e62ab6dee18f268694.1689932341.git.viresh.kumar@linaro.org>
Date: Fri, 21 Jul 2023 15:10:55 +0530
From: Viresh Kumar <viresh.kumar@...aro.org>
To: Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
Stephen Boyd <sboyd@...nel.org>,
"Rafael J. Wysocki" <rafael@...nel.org>
Cc: Viresh Kumar <viresh.kumar@...aro.org>, linux-pm@...r.kernel.org,
Vincent Guittot <vincent.guittot@...aro.org>,
Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
linux-kernel@...r.kernel.org
Subject: [PATCH 2/6] OPP: Introduce dev_pm_opp_find_freq_{ceil/floor}_indexed() APIs
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
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@...aro.org>
[ Viresh: Rearranged definitions in pm_opp.h ]
Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
drivers/opp/core.c | 56 ++++++++++++++++++++++++++++++++++++++++++
include/linux/pm_opp.h | 18 ++++++++++++++
2 files changed, 74 insertions(+)
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
@@ -658,6 +658,34 @@ 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
@@ -683,6 +711,34 @@ 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
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 3821f50b9b89..2617f2c51f29 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -125,9 +125,15 @@ struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
unsigned long *freq);
+struct dev_pm_opp *dev_pm_opp_find_freq_floor_indexed(struct device *dev,
+ unsigned long *freq, u32 index);
+
struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
unsigned long *freq);
+struct dev_pm_opp *dev_pm_opp_find_freq_ceil_indexed(struct device *dev,
+ unsigned long *freq, u32 index);
+
struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev,
unsigned int level);
@@ -261,12 +267,24 @@ static inline struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
return ERR_PTR(-EOPNOTSUPP);
}
+static inline struct dev_pm_opp *
+dev_pm_opp_find_freq_floor_indexed(struct device *dev, unsigned long *freq, u32 index)
+{
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
static inline struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
unsigned long *freq)
{
return ERR_PTR(-EOPNOTSUPP);
}
+static inline struct dev_pm_opp *
+dev_pm_opp_find_freq_ceil_indexed(struct device *dev, unsigned long *freq, u32 index)
+{
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
static inline struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev,
unsigned int level)
{
--
2.31.1.272.g89b43f80a514
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