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Message-Id: <20230712103213.101770-8-manivannan.sadhasivam@linaro.org>
Date: Wed, 12 Jul 2023 16:02:02 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: vireshk@...nel.org, nm@...com, sboyd@...nel.org,
myungjoo.ham@...sung.com, kyungmin.park@...sung.com,
cw00.choi@...sung.com, andersson@...nel.org,
konrad.dybcio@...aro.org, robh+dt@...nel.org,
krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org
Cc: linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
quic_asutoshd@...cinc.com, quic_cang@...cinc.com,
quic_nitirawa@...cinc.com, quic_narepall@...cinc.com,
quic_bhaskarv@...cinc.com, quic_richardp@...cinc.com,
quic_nguyenb@...cinc.com, quic_ziqichen@...cinc.com,
bmasney@...hat.com, krzysztof.kozlowski@...aro.org,
Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH 07/14] 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@...aro.org>
---
drivers/opp/core.c | 54 ++++++++++++++++++++++++++++++++++++++++++
include/linux/pm_opp.h | 18 ++++++++++++++
2 files changed, 72 insertions(+)
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 3f46e499d615..a6d0b6b18e0e 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -658,6 +658,33 @@ 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 +710,33 @@ 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 dc1fb5890792..991f54da79b5 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -124,6 +124,9 @@ 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_level_exact(struct device *dev,
unsigned int level);
struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev,
@@ -132,6 +135,9 @@ struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev,
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_bw_ceil(struct device *dev,
unsigned int *bw, int index);
@@ -271,12 +277,24 @@ 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_bw_ceil(struct device *dev,
unsigned int *bw, int index)
{
--
2.25.1
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