linux-kernel - [PATCH 2/2] PM: clk: add devm_pm_clk

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Message-Id: <20210727210202.717181-3-dmitry.baryshkov@linaro.org>
Date:   Wed, 28 Jul 2021 00:02:02 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Pavel Machek <pavel@....cz>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        linux-arm-msm@...r.kernel.org
Subject: [PATCH 2/2] PM: clk: add devm_pm_clk_create helper

Add devm_pm_clk_create helper, devres-enabled version of the
pm_clk_create(), which will call pm_clk_destroy at the correct time.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
 drivers/base/power/clock_ops.c | 17 +++++++++++++++++
 include/linux/pm_clock.h       |  5 +++++
 2 files changed, 22 insertions(+)

diff --git a/drivers/base/power/clock_ops.c b/drivers/base/power/clock_ops.c
index 0251f3e6e61d..4110c19c08dc 100644
--- a/drivers/base/power/clock_ops.c
+++ b/drivers/base/power/clock_ops.c
@@ -519,6 +519,23 @@ void pm_clk_destroy(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(pm_clk_destroy);
 
+static void pm_clk_destroy_action(void *data)
+{
+	pm_clk_destroy(data);
+}
+
+int devm_pm_clk_create(struct device *dev)
+{
+	int ret;
+
+	ret = pm_clk_create(dev);
+	if (ret)
+		return ret;
+
+	return devm_add_action_or_reset(dev, pm_clk_destroy_action, dev);
+}
+EXPORT_SYMBOL_GPL(devm_pm_clk_create);
+
 /**
  * pm_clk_suspend - Disable clocks in a device's PM clock list.
  * @dev: Device to disable the clocks for.
diff --git a/include/linux/pm_clock.h b/include/linux/pm_clock.h
index 8ddc7860e131..ada3a0ab10bf 100644
--- a/include/linux/pm_clock.h
+++ b/include/linux/pm_clock.h
@@ -47,6 +47,7 @@ extern void pm_clk_remove(struct device *dev, const char *con_id);
 extern void pm_clk_remove_clk(struct device *dev, struct clk *clk);
 extern int pm_clk_suspend(struct device *dev);
 extern int pm_clk_resume(struct device *dev);
+extern int devm_pm_clk_create(struct device *dev);
 #else
 static inline bool pm_clk_no_clocks(struct device *dev)
 {
@@ -83,6 +84,10 @@ static inline void pm_clk_remove(struct device *dev, const char *con_id)
 static inline void pm_clk_remove_clk(struct device *dev, struct clk *clk)
 {
 }
+static inline int devm_pm_clk_create(struct device *dev)
+{
+	return -EINVAL;
+}
 #endif
 
 #ifdef CONFIG_HAVE_CLK
-- 
2.30.2