cpufreq: cpufreq-dt: Improve debug about matching OPP

During test of new DT OPPs it's very helpful to print the matching
OPP in case of frequency change. So it will be easier to find frequency
rounding issues in the dts file.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index f657c571b18e4e6baaa52250640aac4e1fa26267..725fb1d86578d50d63254467b8b5cbc4d6cb35b1 100644 (file)
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -58,6 +58,8 @@ static int set_target(struct cpufreq_policy *policy, unsigned int index)
        old_freq = clk_get_rate(cpu_clk) / 1000;
 
        if (!IS_ERR(cpu_reg)) {
+               unsigned long opp_freq;
+
                rcu_read_lock();
                opp = dev_pm_opp_find_freq_ceil(cpu_dev, &freq_Hz);
                if (IS_ERR(opp)) {
@@ -67,9 +69,12 @@ static int set_target(struct cpufreq_policy *policy, unsigned int index)
                        return PTR_ERR(opp);
                }
                volt = dev_pm_opp_get_voltage(opp);
+               opp_freq = dev_pm_opp_get_freq(opp);
                rcu_read_unlock();
                tol = volt * priv->voltage_tolerance / 100;
                volt_old = regulator_get_voltage(cpu_reg);
+               dev_dbg(cpu_dev, "Found OPP: %ld kHz, %ld uV\n",
+                       opp_freq / 1000, volt);
        }
 
        dev_dbg(cpu_dev, "%u MHz, %ld mV --> %u MHz, %ld mV\n",