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-rw-r--r--drivers/cpufreq/cpufreq_powersave.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq_powersave.c b/drivers/cpufreq/cpufreq_powersave.c
new file mode 100644
index 000000000..8d830d860
--- /dev/null
+++ b/drivers/cpufreq/cpufreq_powersave.c
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * linux/drivers/cpufreq/cpufreq_powersave.c
+ *
+ * Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/cpufreq.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+static void cpufreq_gov_powersave_limits(struct cpufreq_policy *policy)
+{
+ pr_debug("setting to %u kHz\n", policy->min);
+ __cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
+}
+
+static struct cpufreq_governor cpufreq_gov_powersave = {
+ .name = "powersave",
+ .limits = cpufreq_gov_powersave_limits,
+ .owner = THIS_MODULE,
+ .flags = CPUFREQ_GOV_STRICT_TARGET,
+};
+
+MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
+MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
+MODULE_LICENSE("GPL");
+
+#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
+struct cpufreq_governor *cpufreq_default_governor(void)
+{
+ return &cpufreq_gov_powersave;
+}
+#endif
+
+cpufreq_governor_init(cpufreq_gov_powersave);
+cpufreq_governor_exit(cpufreq_gov_powersave);