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path: root/drivers/cpufreq/cpufreq_powersave.c
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Diffstat (limited to 'drivers/cpufreq/cpufreq_powersave.c')
-rw-r--r--drivers/cpufreq/cpufreq_powersave.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq_powersave.c b/drivers/cpufreq/cpufreq_powersave.c
new file mode 100644
index 000000000000..c85edda7feb0
--- /dev/null
+++ b/drivers/cpufreq/cpufreq_powersave.c
@@ -0,0 +1,59 @@
+/*
+ * 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.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/cpufreq.h>
+#include <linux/init.h>
+
+#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_GOVERNOR, "powersave", msg)
+
+static int cpufreq_governor_powersave(struct cpufreq_policy *policy,
+ unsigned int event)
+{
+ switch (event) {
+ case CPUFREQ_GOV_START:
+ case CPUFREQ_GOV_LIMITS:
+ dprintk("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;
+}
+
+static 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");
+
+module_init(cpufreq_gov_powersave_init);
+module_exit(cpufreq_gov_powersave_exit);