package: starfive: Add power management package

The package is for power management.
Currently adjust the cpufreq paramenters.

Signed-off-by: mason.huo <mason.huo@starfivetech.com>

package/starfive/Config.in

@@ -12,3 +12,4 @@ source "package/starfive/e24-test/Config.in"
 source "package/starfive/stfisp_setfile/Config.in.host"
 source "package/starfive/img-gpu-powervr/Config.in"
 source "package/starfive/drm_test/Config.in"
+source "package/starfive/pm/Config.in"

package/starfive/pm/Config.in

@@ -0,0 +1,6 @@
+comment "pm package"
+
+config BR2_PACKAGE_PM
+	bool "pm"
+	help
+	  Utility for pm initialization & configuration.

package/starfive/pm/S90cpufreq

@@ -0,0 +1,22 @@
+#!/bin/sh
+#
+# cpufreq    This shell script to config cpufreq parameters.
+
+case "$1" in
+	start)
+		# Set the ondemand governor sampling_rate to 100ms.
+		SYS_CPUFREQ_GOVERNOR=/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
+		if [ -e $SYS_CPUFREQ_GOVERNOR ]; then
+			echo "ondemand" > $SYS_CPUFREQ_GOVERNOR
+			echo 100000 > /sys/devices/system/cpu/cpufreq/ondemand/sampling_rate
+		fi
+		;;
+	stop)
+		;;
+	*)
+		echo "Usage: $0 {start|stop}"
+		exit 1
+esac
+
+exit 0
+

package/starfive/pm/pm.mk

@@ -0,0 +1,12 @@
+################################################################################
+#
+# pm
+#
+################################################################################
+PM_LICENSE = GPL-2.0+
+
+define PM_INSTALL_TARGET_CMDS
+	install -m 0755 -D package/starfive/pm/S90cpufreq $(TARGET_DIR)/etc/init.d/
+endef
+
+$(eval $(generic-package))