ipq806x: 5.15: backport devfreq new cpufreq based PASSIVE governor

Backport devfreq new cpufreq based PASSIVE governor needed for devfreq
based fab and cache scaling.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/target/linux/ipq806x/patches-5.15/112-v5.19-PM-devfreq-Fix-kernel-warning-with-cpufreq-passive-r.patch b/target/linux/ipq806x/patches-5.15/112-v5.19-PM-devfreq-Fix-kernel-warning-with-cpufreq-passive-r.patch
new file mode 100644
index 0000000000..3d2bb2de05
--- /dev/null
+++ b/target/linux/ipq806x/patches-5.15/112-v5.19-PM-devfreq-Fix-kernel-warning-with-cpufreq-passive-r.patch
@@ -0,0 +1,31 @@
+From 82c66d2bbbeda9e493487e7413769087a0b46250 Mon Sep 17 00:00:00 2001
+From: Christian Marangi <ansuelsmth@gmail.com>
+Date: Mon, 20 Jun 2022 00:29:39 +0200
+Subject: [PATCH 1/1] PM / devfreq: Fix kernel warning with cpufreq passive
+ register fail
+
+Remove cpufreq_passive_unregister_notifier from
+cpufreq_passive_register_notifier in case of error as devfreq core
+already call unregister on GOV_START fail.
+
+This fix the kernel always printing a WARN on governor PROBE_DEFER as
+cpufreq_passive_unregister_notifier is called two times and return
+error on the second call as the cpufreq is already unregistered.
+
+Fixes: a03dacb0316f ("PM / devfreq: Add cpu based scaling support to passive governor")
+Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
+Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
+---
+ drivers/devfreq/governor_passive.c | 1 -
+ 1 file changed, 1 deletion(-)
+
+--- a/drivers/devfreq/governor_passive.c
++++ b/drivers/devfreq/governor_passive.c
+@@ -336,7 +336,6 @@ err_free_cpu_data:
+ err_put_policy:
+ 	cpufreq_cpu_put(policy);
+ err:
+-	WARN_ON(cpufreq_passive_unregister_notifier(devfreq));
+ 
+ 	return ret;
+ }