[PATCH v2] cpufreq: scpi: invoke frequency-invariance setter function

[Dietmar Eggemann]

Commit 343a8d17fa8d ("cpufreq: scpi: remove arm_big_little dependency")
changed the cpufreq driver on juno from arm_big_little to scpi.

The scpi set_target function does not call the frequency-invariance
setter function arch_set_freq_scale() like the arm_big_little set_target
function does. As a result the task scheduler load and utilization
signals are not frequency-invariant on this platform anymore.

Fix this by adding a call to arch_set_freq_scale() into
scpi_cpufreq_set_target().

Fixes: 343a8d17fa8d ("cpufreq: scpi: remove arm_big_little dependency")
Cc: Rafael J. Wysocki <r...@rjwysocki.net>
Cc: Viresh Kumar <viresh.ku...@linaro.org>
Cc: Sudeep Holla <sudeep.ho...@arm.com>
Signed-off-by: Dietmar Eggemann <dietmar.eggem...@arm.com>
Acked-by: Sudeep Holla <sudeep.ho...@arm.com>
Acked-by: Viresh Kumar <viresh.ku...@linaro.org>
---
 drivers/cpufreq/scpi-cpufreq.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/cpufreq/scpi-cpufreq.c b/drivers/cpufreq/scpi-cpufreq.c
index c32a833e1b00..d300a163945f 100644
--- a/drivers/cpufreq/scpi-cpufreq.c
+++ b/drivers/cpufreq/scpi-cpufreq.c
@@ -51,15 +51,23 @@ static unsigned int scpi_cpufreq_get_rate(unsigned int cpu)
 static int
 scpi_cpufreq_set_target(struct cpufreq_policy *policy, unsigned int index)
 {
+       unsigned long freq = policy->freq_table[index].frequency;
        struct scpi_data *priv = policy->driver_data;
-       u64 rate = policy->freq_table[index].frequency * 1000;
+       u64 rate = freq * 1000;
        int ret;
 
        ret = clk_set_rate(priv->clk, rate);
-       if (!ret && (clk_get_rate(priv->clk) != rate))
-               ret = -EIO;
 
-       return ret;
+       if (ret)
+               return ret;
+
+       if (clk_get_rate(priv->clk) != rate)
+               return -EIO;
+
+       arch_set_freq_scale(policy->related_cpus, freq,
+                           policy->cpuinfo.max_freq);
+
+       return 0;
 }
 
 static int
-- 
2.11.0