linux-kernel - [PATCH v4 07/12] OPP: Add and export helper to get icc path count

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Message-Id: <20200504202243.5476-8-sibis@codeaurora.org>
Date:   Tue,  5 May 2020 01:52:38 +0530
From:   Sibi Sankar <sibis@...eaurora.org>
To:     viresh.kumar@...aro.org, sboyd@...nel.org,
        georgi.djakov@...aro.org, bjorn.andersson@...aro.org,
        saravanak@...gle.com, mka@...omium.org
Cc:     nm@...com, agross@...nel.org, david.brown@...aro.org,
        robh+dt@...nel.org, mark.rutland@....com, rjw@...ysocki.net,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        dianders@...omium.org, vincent.guittot@...aro.org,
        amit.kucheria@...aro.org, ulf.hansson@...aro.org,
        lukasz.luba@....com, sudeep.holla@....com,
        Sibi Sankar <sibis@...eaurora.org>
Subject: [PATCH v4 07/12] OPP: Add and export helper to get icc path count

Add and export 'dev_pm_opp_get_path_count' to get the icc path count
associated with the device.

Signed-off-by: Sibi Sankar <sibis@...eaurora.org>
---
 drivers/opp/core.c     | 20 ++++++++++++++++++++
 include/linux/pm_opp.h |  6 ++++++
 2 files changed, 26 insertions(+)

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index f157e2d768d76..6106146a582d5 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -343,6 +343,26 @@ int dev_pm_opp_get_opp_count(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_count);
 
+int dev_pm_opp_get_path_count(struct device *dev)
+{
+	struct opp_table *opp_table;
+	int count;
+
+	opp_table = _find_opp_table(dev);
+	if (IS_ERR(opp_table)) {
+		count = PTR_ERR(opp_table);
+		dev_dbg(dev, "%s: OPP table not found (%d)\n",
+			__func__, count);
+		return count;
+	}
+
+	count = opp_table->path_count;
+	dev_pm_opp_put_opp_table(opp_table);
+
+	return count;
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_path_count);
+
 /**
  * dev_pm_opp_find_freq_exact() - search for an exact frequency
  * @dev:		device for which we do this operation
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 87ba295080a2b..ffd075c8da0ca 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -101,6 +101,7 @@ unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp);
 bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp);
 
 int dev_pm_opp_get_opp_count(struct device *dev);
+int dev_pm_opp_get_path_count(struct device *dev);
 unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev);
 unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev);
 unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev);
@@ -197,6 +198,11 @@ static inline int dev_pm_opp_get_opp_count(struct device *dev)
 	return 0;
 }
 
+static inline int dev_pm_opp_get_path_count(struct device *dev)
+{
+	return 0;
+}
+
 static inline unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
 {
 	return 0;
-- 
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