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Date:	Thu, 23 Oct 2014 17:23:00 +0300
From:	Grygorii Strashko <>
To:	<>, "Rafael J. Wysocki" <>,
CC:	<>, Rob Herring <>,
	<>, <>,
	Grygorii Strashko <>,
	Ulf Hansson <>,
	Geert Uytterhoeven <>,
	Dmitry Torokhov <>
Subject: [PATCH v3 3/5] PM / clock_ops: add and enable clocks always if !CONFIG_PM_RUNTIME

Device's clocks need to be enabled always at probing time
if !CONFIG_PM_RUNTIME - in that way, device will become accessible
and, later, its clocks can be disabled/enabled during system
suspend/resume by using pm_clk_suspend/pm_clk_resume APIs.

But now, the clocks management code doesn't enable clocks when
clocks are being registered per-device by using pm_clk_add/_clk().
So, update pm_clk_acquire(), which is called from pm_clk_add/_clk(),
to enable clocks always if !CONFIG_PM_RUNTIME.

Also, Platform PM domains drivers will not need to add code like below
each time they need to handle the case when !CONFIG_PM_RUNTIME [1 - 3]:

               ret = pm_clk_resume(dev);
               if (ret) {
                       dev_err(dev, "pm_clk_resume failed %d\n", ret);
                       goto clk_err;


CC: Santosh Shilimkar <>
CC: Kevin Hilman <>
CC: Ulf Hansson <>
CC: Geert Uytterhoeven <>
CC: Dmitry Torokhov <>
Signed-off-by: Grygorii Strashko <>
 drivers/base/power/clock_ops.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/base/power/clock_ops.c b/drivers/base/power/clock_ops.c
index c3b44c1..87d07dc 100644
--- a/drivers/base/power/clock_ops.c
+++ b/drivers/base/power/clock_ops.c
@@ -68,6 +68,10 @@ static void pm_clk_acquire(struct device *dev, struct pm_clock_entry *ce)
 		ce->status = PCE_STATUS_ACQUIRED;
 		dev_dbg(dev, "Clock %s managed by runtime PM.\n", ce->con_id);
+		__pm_clk_enable(dev, ce);
+	}
 static int __pm_clk_add(struct device *dev, const char *con_id,

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