cpufreq: expose a cpufreq_quick_get_max routine

This allows drivers and other code to get the max reported CPU frequency.
Initial use is for scaling ring frequency with GPU frequency in the i915
driver.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 0a5bea9e3585..987a165ede26 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1199,6 +1199,26 @@ unsigned int cpufreq_quick_get(unsigned int cpu)
 }
 EXPORT_SYMBOL(cpufreq_quick_get);
 
+/**
+ * cpufreq_quick_get_max - get the max reported CPU frequency for this CPU
+ * @cpu: CPU number
+ *
+ * Just return the max possible frequency for a given CPU.
+ */
+unsigned int cpufreq_quick_get_max(unsigned int cpu)
+{
+        struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
+        unsigned int ret_freq = 0;
+
+        if (policy) {
+                ret_freq = policy->max;
+                cpufreq_cpu_put(policy);
+        }
+
+        return ret_freq;
+}
+EXPORT_SYMBOL(cpufreq_quick_get_max);
+
 
 static unsigned int __cpufreq_get(unsigned int cpu)
 {