Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / cpufreq / cpufreq_powersave.c

diff --git a/kernel/drivers/cpufreq/cpufreq_powersave.c b/kernel/drivers/cpufreq/cpufreq_powersave.c
new file mode 100644 (file)
index 0000000..e3b874c
--- /dev/null
+++ b/kernel/drivers/cpufreq/cpufreq_powersave.c
@@ -0,0 +1,64 @@
+/*
+ * linux/drivers/cpufreq/cpufreq_powersave.c
+ *
+ * Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/cpufreq.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+static int cpufreq_governor_powersave(struct cpufreq_policy *policy,
+                                       unsigned int event)
+{
+       switch (event) {
+       case CPUFREQ_GOV_START:
+       case CPUFREQ_GOV_LIMITS:
+               pr_debug("setting to %u kHz because of event %u\n",
+                                                       policy->min, event);
+               __cpufreq_driver_target(policy, policy->min,
+                                               CPUFREQ_RELATION_L);
+               break;
+       default:
+               break;
+       }
+       return 0;
+}
+
+#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
+static
+#endif
+struct cpufreq_governor cpufreq_gov_powersave = {
+       .name           = "powersave",
+       .governor       = cpufreq_governor_powersave,
+       .owner          = THIS_MODULE,
+};
+
+static int __init cpufreq_gov_powersave_init(void)
+{
+       return cpufreq_register_governor(&cpufreq_gov_powersave);
+}
+
+static void __exit cpufreq_gov_powersave_exit(void)
+{
+       cpufreq_unregister_governor(&cpufreq_gov_powersave);
+}
+
+MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
+MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
+MODULE_LICENSE("GPL");
+
+#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
+fs_initcall(cpufreq_gov_powersave_init);
+#else
+module_init(cpufreq_gov_powersave_init);
+#endif
+module_exit(cpufreq_gov_powersave_exit);