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Subject[PATCH 13/16] PM / OPP: Manage device clk as well
Date
OPP core has got almost everything now to manage device's OPP
transitions, the only thing left is device's clk. Get that as well.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
drivers/base/power/opp/core.c | 9 +++++++++
drivers/base/power/opp/opp.h | 3 +++
2 files changed, 12 insertions(+)

diff --git a/drivers/base/power/opp/core.c b/drivers/base/power/opp/core.c
index 9633f2fc3481..a04dcacb8a07 100644
--- a/drivers/base/power/opp/core.c
+++ b/drivers/base/power/opp/core.c
@@ -636,6 +636,11 @@ static struct device_opp *_add_device_opp(struct device *dev, int supply_count,
if (supply_count == 1)
*dev_opp->supply_names = dev_name(dev);

+ /* Find clk for the device */
+ dev_opp->clk = clk_get(dev, NULL);
+ if (IS_ERR(dev_opp->clk))
+ dev_dbg(dev, "%s: Couldn't find clock\n", __func__);
+
srcu_init_notifier_head(&dev_opp->srcu_head);
INIT_LIST_HEAD(&dev_opp->opp_list);

@@ -669,6 +674,10 @@ static void _remove_device_opp(struct device_opp *dev_opp)
if (!list_empty(&dev_opp->opp_list))
return;

+ /* Release clk */
+ if (!IS_ERR(dev_opp->clk))
+ clk_put(dev_opp->clk);
+
/* Release regulators */
for (count = dev_opp->supply_count - 1; count >= 0; count--)
regulator_put(dev_opp->regulators[count]);
diff --git a/drivers/base/power/opp/opp.h b/drivers/base/power/opp/opp.h
index 55205cbe59dc..e36ee6296f1a 100644
--- a/drivers/base/power/opp/opp.h
+++ b/drivers/base/power/opp/opp.h
@@ -14,6 +14,7 @@
#ifndef __DRIVER_OPP_H__
#define __DRIVER_OPP_H__

+#include <linux/clk.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/list.h>
@@ -135,6 +136,7 @@ struct device_list_opp {
* @dev_list: list of devices that share these OPPs
* @opp_list: list of opps
* @np: struct device_node pointer for opp's DT node.
+ * @clk: struct clk pointer
* @supply_count: Number of power-supplies
* @regulators: Array of regulators
* @supply_names: Array of strings containing names of the power-supplies
@@ -163,6 +165,7 @@ struct device_opp {
struct device_node *np;
unsigned long clock_latency_ns_max;

+ struct clk *clk;
unsigned int supply_count;
struct regulator **regulators;
const char **supply_names;
--
2.4.0


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