cpufreq: ARM big LITTLE DT: Return CPUFREQ_ETERNAL if clock-latency isn't found

If "/cpus" node isn't present or "clock-latency" isn't defined we are
returning error currently. Let's return CPUFREQ_ETERNAL instead, so
that we don't fail.

Flag appropriate messages to user in such cases.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/cpufreq/arm_big_little_dt.c b/drivers/cpufreq/arm_big_little_dt.c
index d5ae4d2362e3..173ed059d95f 100644
--- a/drivers/cpufreq/arm_big_little_dt.c
+++ b/drivers/cpufreq/arm_big_little_dt.c
@@ -66,8 +66,8 @@ static int dt_get_transition_latency(struct device *cpu_dev)
 
         parent = of_find_node_by_path("/cpus");
         if (!parent) {
-                pr_err("failed to find OF /cpus\n");
-                return -ENOENT;
+                pr_info("Failed to find OF /cpus. Use CPUFREQ_ETERNAL transition latency\n");
+                return CPUFREQ_ETERNAL;
         }
 
         for_each_child_of_node(parent, np) {
@@ -81,7 +81,8 @@ static int dt_get_transition_latency(struct device *cpu_dev)
                 return transition_latency;
         }
 
-        return -ENODEV;
+        pr_info("clock-latency isn't found, use CPUFREQ_ETERNAL transition latency\n");
+        return CPUFREQ_ETERNAL;
 }
 
 static struct cpufreq_arm_bL_ops dt_bL_ops = {