@@ -484,8 +484,10 @@ static int tegra_devfreq_target(struct device *dev, unsigned long *freq,
u32 flags)
{
struct tegra_devfreq *tegra = dev_get_drvdata(dev);
+ struct devfreq *devfreq = tegra->devfreq;
struct dev_pm_opp *opp;
unsigned long rate;
+ int err;
opp = devfreq_recommended_opp(dev, freq, flags);
if (IS_ERR(opp)) {
@@ -495,10 +497,20 @@ static int tegra_devfreq_target(struct device *dev, unsigned long *freq,
rate = dev_pm_opp_get_freq(opp);
dev_pm_opp_put(opp);
- clk_set_min_rate(tegra->emc_clock, rate);
- clk_set_rate(tegra->emc_clock, 0);
+ err = clk_set_min_rate(tegra->emc_clock, rate);
+ if (err)
+ return err;
+
+ err = clk_set_rate(tegra->emc_clock, 0);
+ if (err)
+ goto restore_min_rate;
return 0;
+
+restore_min_rate:
+ clk_set_min_rate(tegra->emc_clock, devfreq->previous_freq);
+
+ return err;
}
static int tegra_devfreq_get_dev_status(struct device *dev,