linux-kernel - [PATCH 1/6] PM / clock_ops: Add helpers combining generic runtime and generic clock PM

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Message-Id: <1398335198-26555-2-git-send-email-geert+renesas@glider.be>
Date:	Thu, 24 Apr 2014 12:26:33 +0200
From:	Geert Uytterhoeven <geert+renesas@...der.be>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	Ben Dooks <ben.dooks@...ethink.co.uk>,
	linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org,
	linux-sh@...r.kernel.org, devicetree@...r.kernel.org,
	Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH 1/6] PM / clock_ops: Add helpers combining generic runtime and generic clock PM

Add helpers pm_generic_runtime_clk_suspend() and
pm_generic_clk_runtime_resume(), combining generic runtime PM and generic
clock PM.

Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
 drivers/base/power/clock_ops.c |   40 ++++++++++++++++++++++++++++++++++++++++
 include/linux/pm_clock.h       |    6 ++++++
 2 files changed, 46 insertions(+)

diff --git a/drivers/base/power/clock_ops.c b/drivers/base/power/clock_ops.c
index 2d5c9c1eceb1..3cdb9fa2920d 100644
--- a/drivers/base/power/clock_ops.c
+++ b/drivers/base/power/clock_ops.c
@@ -11,6 +11,7 @@
 #include <linux/io.h>
 #include <linux/pm.h>
 #include <linux/pm_clock.h>
+#include <linux/pm_runtime.h>
 #include <linux/clk.h>
 #include <linux/slab.h>
 #include <linux/err.h>
@@ -523,3 +524,42 @@ void pm_clk_add_notifier(struct bus_type *bus,
 	clknb->nb.notifier_call = pm_clk_notify;
 	bus_register_notifier(bus, &clknb->nb);
 }
+
+/**
+ * pm_generic_runtime_clk_suspend - Generic runtime suspend and clock disable
+ *				    callback for subsystems.
+ * @dev: Device to resume.
+ */
+int pm_generic_runtime_clk_suspend(struct device *dev)
+{
+	int ret;
+
+	dev_dbg(dev, "%s\n", __func__);
+
+	ret = pm_generic_runtime_suspend(dev);
+	if (ret)
+		return ret;
+
+	ret = pm_clk_suspend(dev);
+	if (ret) {
+		pm_generic_runtime_resume(dev);
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(pm_generic_runtime_clk_suspend);
+
+/**
+ * pm_generic_clk_runtime_resume - Generic clock enable and runtime resume
+ *				   callback for subsystems.
+ * @dev: Device to resume.
+ */
+int pm_generic_clk_runtime_resume(struct device *dev)
+{
+	dev_dbg(dev, "%s\n", __func__);
+
+	pm_clk_resume(dev);
+	return pm_generic_runtime_resume(dev);
+}
+EXPORT_SYMBOL_GPL(pm_generic_clk_runtime_resume);
diff --git a/include/linux/pm_clock.h b/include/linux/pm_clock.h
index 6981aa288c45..bf1e4d09a0ca 100644
--- a/include/linux/pm_clock.h
+++ b/include/linux/pm_clock.h
@@ -35,6 +35,8 @@ extern int pm_clk_add_clk(struct device *dev, struct clk *clk);
 extern void pm_clk_remove(struct device *dev, const char *con_id);
 extern int pm_clk_suspend(struct device *dev);
 extern int pm_clk_resume(struct device *dev);
+extern int pm_generic_runtime_clk_suspend(struct device *dev);
+extern int pm_generic_clk_runtime_resume(struct device *dev);
 #else
 static inline bool pm_clk_no_clocks(struct device *dev)
 {
@@ -59,6 +61,10 @@ static inline void pm_clk_remove(struct device *dev, const char *con_id)
 }
 #define pm_clk_suspend	NULL
 #define pm_clk_resume	NULL
+static inline int pm_generic_runtime_clk_suspend(struct device *dev)
+	{ return 0; }
+static inline int pm_generic_clk_runtime_resume(struct device *dev)
+	{ return 0; }
 #endif
 
 #ifdef CONFIG_HAVE_CLK
-- 
1.7.9.5

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