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path: root/drivers/devfreq/exynos-bus.c
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Diffstat (limited to 'drivers/devfreq/exynos-bus.c')
-rw-r--r--drivers/devfreq/exynos-bus.c29
1 files changed, 14 insertions, 15 deletions
diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
index 29866f7e6d7e..a8ed7792ece2 100644
--- a/drivers/devfreq/exynos-bus.c
+++ b/drivers/devfreq/exynos-bus.c
@@ -35,7 +35,7 @@ struct exynos_bus {
unsigned int edev_count;
struct mutex lock;
- struct dev_pm_opp *curr_opp;
+ unsigned long curr_freq;
struct regulator *regulator;
struct clk *clk;
@@ -99,7 +99,7 @@ static int exynos_bus_target(struct device *dev, unsigned long *freq, u32 flags)
{
struct exynos_bus *bus = dev_get_drvdata(dev);
struct dev_pm_opp *new_opp;
- unsigned long old_freq, new_freq, old_volt, new_volt, tol;
+ unsigned long old_freq, new_freq, new_volt, tol;
int ret = 0;
/* Get new opp-bus instance according to new bus clock */
@@ -113,8 +113,7 @@ static int exynos_bus_target(struct device *dev, unsigned long *freq, u32 flags)
new_freq = dev_pm_opp_get_freq(new_opp);
new_volt = dev_pm_opp_get_voltage(new_opp);
- old_freq = dev_pm_opp_get_freq(bus->curr_opp);
- old_volt = dev_pm_opp_get_voltage(bus->curr_opp);
+ old_freq = bus->curr_freq;
rcu_read_unlock();
if (old_freq == new_freq)
@@ -146,7 +145,7 @@ static int exynos_bus_target(struct device *dev, unsigned long *freq, u32 flags)
goto out;
}
}
- bus->curr_opp = new_opp;
+ bus->curr_freq = new_freq;
dev_dbg(dev, "Set the frequency of bus (%lukHz -> %lukHz)\n",
old_freq/1000, new_freq/1000);
@@ -163,9 +162,7 @@ static int exynos_bus_get_dev_status(struct device *dev,
struct devfreq_event_data edata;
int ret;
- rcu_read_lock();
- stat->current_frequency = dev_pm_opp_get_freq(bus->curr_opp);
- rcu_read_unlock();
+ stat->current_frequency = bus->curr_freq;
ret = exynos_bus_get_event(bus, &edata);
if (ret < 0) {
@@ -226,7 +223,7 @@ static int exynos_bus_passive_target(struct device *dev, unsigned long *freq,
}
new_freq = dev_pm_opp_get_freq(new_opp);
- old_freq = dev_pm_opp_get_freq(bus->curr_opp);
+ old_freq = bus->curr_freq;
rcu_read_unlock();
if (old_freq == new_freq)
@@ -242,7 +239,7 @@ static int exynos_bus_passive_target(struct device *dev, unsigned long *freq,
}
*freq = new_freq;
- bus->curr_opp = new_opp;
+ bus->curr_freq = new_freq;
dev_dbg(dev, "Set the frequency of bus (%lukHz -> %lukHz)\n",
old_freq/1000, new_freq/1000);
@@ -335,6 +332,7 @@ static int exynos_bus_parse_of(struct device_node *np,
struct exynos_bus *bus)
{
struct device *dev = bus->dev;
+ struct dev_pm_opp *opp;
unsigned long rate;
int ret;
@@ -352,22 +350,23 @@ static int exynos_bus_parse_of(struct device_node *np,
}
/* Get the freq and voltage from OPP table to scale the bus freq */
- rcu_read_lock();
ret = dev_pm_opp_of_add_table(dev);
if (ret < 0) {
dev_err(dev, "failed to get OPP table\n");
- rcu_read_unlock();
goto err_clk;
}
rate = clk_get_rate(bus->clk);
- bus->curr_opp = devfreq_recommended_opp(dev, &rate, 0);
- if (IS_ERR(bus->curr_opp)) {
+
+ rcu_read_lock();
+ opp = devfreq_recommended_opp(dev, &rate, 0);
+ if (IS_ERR(opp)) {
dev_err(dev, "failed to find dev_pm_opp\n");
rcu_read_unlock();
- ret = PTR_ERR(bus->curr_opp);
+ ret = PTR_ERR(opp);
goto err_opp;
}
+ bus->curr_freq = dev_pm_opp_get_freq(opp);
rcu_read_unlock();
return 0;