[PATCH v6 1/4] scmi-cpufreq: Remove deferred probe

From: Nicola Mazzucato
Date: Mon Jan 11 2021 - 10:44:05 EST


The current implementation still carries a case for a deferred probe, but
in practise this should not happen anymore.

Since the energy model expects to pass the number of OPPs, let us just
move the call dev_pm_opp_get_opp_count closer to EM registration instead.

Signed-off-by: Nicola Mazzucato <nicola.mazzucato@xxxxxxx>
---
drivers/cpufreq/scmi-cpufreq.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c
index 491a0a24fb1e..15b213ed78fa 100644
--- a/drivers/cpufreq/scmi-cpufreq.c
+++ b/drivers/cpufreq/scmi-cpufreq.c
@@ -153,13 +153,6 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy)
return ret;
}

- nr_opp = dev_pm_opp_get_opp_count(cpu_dev);
- if (nr_opp <= 0) {
- dev_dbg(cpu_dev, "OPP table is not ready, deferring probe\n");
- ret = -EPROBE_DEFER;
- goto out_free_opp;
- }
-
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv) {
ret = -ENOMEM;
@@ -190,6 +183,15 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy)
policy->fast_switch_possible =
handle->perf_ops->fast_switch_possible(handle, cpu_dev);

+ nr_opp = dev_pm_opp_get_opp_count(cpu_dev);
+ if (nr_opp <= 0) {
+ dev_err(cpu_dev, "%s: No OPPs for this device: %d\n",
+ __func__, ret);
+
+ ret = -ENODEV;
+ goto out_free_priv;
+ }
+
power_scale_mw = handle->perf_ops->power_scale_mw_get(handle);
em_dev_register_perf_domain(cpu_dev, nr_opp, &em_cb, policy->cpus,
power_scale_mw);
--
2.27.0