On Friday 01 Feb 2019 at 11:53:57 (+0000), Sudeep Holla wrote:

On Fri, Feb 01, 2019 at 09:31:00AM +0000, Quentin Perret wrote:

quoted

From: Dietmar Eggemann <dietmar.eggemann@arm.com>

Now that PM_OPP provides a helper function to estimate the power
consumed by CPUs, make sure to try and register an Energy Model (EM)
from the arm_big_little CPUFreq driver, hence ensuring interested
subsystems (the task scheduler, for example) can make use of that
information when available.

Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Quentin Perret <redacted>
---
 drivers/cpufreq/arm_big_little.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/cpufreq/arm_big_little.c b/drivers/cpufreq/arm_big_little.c
index cf62a1f64dd7..18b05bcb2614 100644
--- a/drivers/cpufreq/arm_big_little.c
+++ b/drivers/cpufreq/arm_big_little.c

@@ -487,6 +487,14 @@ static int bL_cpufreq_init(struct cpufreq_policy *policy)
 	policy->cpuinfo.transition_latency =
 				arm_bL_ops->get_transition_latency(cpu_dev);

+	ret = dev_pm_opp_get_opp_count(cpu_dev);
+	if (ret <= 0) {
+		dev_dbg(cpu_dev, "OPP table is not ready, deferring probe\n");
+		return -EPROBE_DEFER;
+	}

The only user of this has the check in init_opp_table that gets called from
get_cluster_clk_and_freq_table. So the above is not necessary, you can drop
it.

Will do.

Thanks,
Quentin

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