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PM / OPP: Manage device clk 

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>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
hifive-unleashed-5.1
Viresh Kumar 2016-02-09 10:30:38 +05:30 committed by Rafael J. Wysocki
parent 50f8cfbd58
commit d54974c251
2 changed files with 18 additions and 0 deletions
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15
drivers/base/power/opp/core.c
View File

@ -13,6 +13,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/clk.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/slab.h>
@ -583,6 +584,7 @@ static struct device_opp *_add_device_opp(struct device *dev)
struct device_opp *dev_opp;
struct device_list_opp *list_dev;
struct device_node *np;
int ret;
/* Check for existing list for 'dev' first */
dev_opp = _find_device_opp(dev);
@ -620,6 +622,15 @@ static struct device_opp *_add_device_opp(struct device *dev)
of_node_put(np);
}
/* Find clk for the device */
dev_opp->clk = clk_get(dev, NULL);
if (IS_ERR(dev_opp->clk)) {
ret = PTR_ERR(dev_opp->clk);
if (ret != -EPROBE_DEFER)
dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__,
ret);
}
srcu_init_notifier_head(&dev_opp->srcu_head);
INIT_LIST_HEAD(&dev_opp->opp_list);
@ -661,6 +672,10 @@ static void _remove_device_opp(struct device_opp *dev_opp)
if (!IS_ERR_OR_NULL(dev_opp->regulator))
return;
/* Release clk */
if (!IS_ERR(dev_opp->clk))
clk_put(dev_opp->clk);
list_dev = list_first_entry(&dev_opp->dev_list, struct device_list_opp,
node);

3
drivers/base/power/opp/opp.h
View File

@ -22,6 +22,7 @@
#include <linux/rculist.h>
#include <linux/rcupdate.h>
struct clk;
struct regulator;
/* Lock to allow exclusive modification to the device and opp lists */
@ -134,6 +135,7 @@ struct device_list_opp {
* @supported_hw: Array of version number to support.
* @supported_hw_count: Number of elements in supported_hw array.
* @prop_name: A name to postfix to many DT properties, while parsing them.
* @clk: Device's clock handle
* @regulator: Supply regulator
* @dentry: debugfs dentry pointer of the real device directory (not links).
* @dentry_name: Name of the real dentry.
@ -168,6 +170,7 @@ struct device_opp {
unsigned int *supported_hw;
unsigned int supported_hw_count;
const char *prop_name;
struct clk *clk;
struct regulator *regulator;
#ifdef CONFIG_DEBUG_FS