linux-kernel - [PATCH v2 2/4] PM / devfreq: Add devm_devfreq_add

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Message-Id: <20210920172249.28206-3-digetx@gmail.com>
Date:   Mon, 20 Sep 2021 20:22:47 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>
Cc:     linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org
Subject: [PATCH v2 2/4] PM / devfreq: Add devm_devfreq_add_governor()

Add resource-managed variant of devfreq_add_governor().

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/devfreq/devfreq.c  | 26 ++++++++++++++++++++++++++
 drivers/devfreq/governor.h |  3 +++
 2 files changed, 29 insertions(+)

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 85faa7a5c7d1..4579eefb8fe7 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -1301,6 +1301,32 @@ int devfreq_add_governor(struct devfreq_governor *governor)
 }
 EXPORT_SYMBOL(devfreq_add_governor);
 
+static void devm_devfreq_remove_governor(void *governor)
+{
+	WARN_ON(devfreq_remove_governor(governor));
+}
+
+/**
+ * devm_devfreq_add_governor() - Add devfreq governor
+ * @dev:	device which adds devfreq governor
+ * @governor:	the devfreq governor to be added
+ *
+ * This is a resource-managed variant of devfreq_add_governor().
+ */
+int devm_devfreq_add_governor(struct device *dev,
+			      struct devfreq_governor *governor)
+{
+	int err;
+
+	err = devfreq_add_governor(governor);
+	if (err)
+		return err;
+
+	return devm_add_action_or_reset(dev, devm_devfreq_remove_governor,
+					governor);
+}
+EXPORT_SYMBOL(devm_devfreq_add_governor);
+
 /**
  * devfreq_remove_governor() - Remove devfreq feature from a device.
  * @governor:	the devfreq governor to be removed
diff --git a/drivers/devfreq/governor.h b/drivers/devfreq/governor.h
index 2d69a0ce6291..002a7d67e39d 100644
--- a/drivers/devfreq/governor.h
+++ b/drivers/devfreq/governor.h
@@ -84,6 +84,9 @@ void devfreq_update_interval(struct devfreq *devfreq, unsigned int *delay);
 int devfreq_add_governor(struct devfreq_governor *governor);
 int devfreq_remove_governor(struct devfreq_governor *governor);
 
+int devm_devfreq_add_governor(struct device *dev,
+			      struct devfreq_governor *governor);
+
 int devfreq_update_status(struct devfreq *devfreq, unsigned long freq);
 int devfreq_update_target(struct devfreq *devfreq, unsigned long freq);
 
-- 
2.32.0