systemd: use a cpufreq service to configure cpu governor

Signed-off-by: Ian Leonard <antonlacon@gmail.com>

packages/sysutils/busybox/scripts/init

@@ -963,15 +963,6 @@ prepare_sysroot() {
 # hide kernel log messages on console
 echo '1 4 1 7' > /proc/sys/kernel/printk
 
-# set ondemand up_threshold
-if [ -e /sys/devices/system/cpu/cpufreq/ondemand/up_threshold ]; then
-  echo 50 > /sys/devices/system/cpu/cpufreq/ondemand/up_threshold
-else
-  for f in $(ls /sys/devices/system/cpu/cpufreq/policy*/ondemand/up_threshold 2>/dev/null) ; do
-    echo 50 > $f
-  done
-fi
-
 # run platform_init script if exists
 if [ -f "./platform_init" ]; then
   ./platform_init

packages/sysutils/systemd/package.mk

@@ -206,6 +206,9 @@ post_makeinstall_target() {
   cp $PKG_DIR/scripts/userconfig-setup $INSTALL/usr/bin
   cp $PKG_DIR/scripts/usercache-setup $INSTALL/usr/bin
 
+  # use systemd to set cpufreq governor and tunables
+  find_file_path scripts/cpufreq && cp -PRv $FOUND_PATH $INSTALL/usr/bin
+
   mkdir -p $INSTALL/usr/sbin
   cp $PKG_DIR/scripts/kernel-overlays-setup $INSTALL/usr/sbin
 
@@ -268,4 +271,5 @@ post_install() {
   enable_service usercache.service
   enable_service kernel-overlays.service
   enable_service hwdb.service
+  enable_service cpufreq.service
 }

packages/sysutils/systemd/scripts/cpufreq

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (C) 2009-2015 Stephan Raue (stephan@openelec.tv)
+# Copyright (C) 2019-present Team LibreELEC (https://libreelec.tv)
+
+SYS_CPUFREQ_GOV=$( cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor )
+SYS_CPUFREQ_DIR="/sys/devices/system/cpu/cpufreq"
+
+# Configure frequency scaling properties
+if [ $SYS_CPUFREQ_GOV = "ondemand" ]; then
+  for policy in ${SYS_CPUFREQ_DIR}/ondemand ${SYS_CPUFREQ_DIR}/policy*/; do
+    if [ -e $policy/up_threshold ]; then
+      echo 50 > $policy/up_threshold
+    fi
+  done
+fi

packages/sysutils/systemd/system.d/cpufreq.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=Set CPU frequency governor and its tunables
+ConditionPathExists=/usr/bin/cpufreq
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/cpufreq
+RemainAfterExit=yes
+
+[Install]
+WantedBy=basic.target