[3/5] cpufreq: ARM big LITTLE DT: Return CPUFREQ_ETERNAL if clock-latency isn't found

Message ID 7103baee30f84c26eb6080e407a9f91d219a54c0.1367241503.git.viresh.kumar@linaro.org
State Accepted
Headers show

Commit Message

Viresh Kumar April 29, 2013, 1:24 p.m.
If "/cpus" node isn't found or "clock-latency" isn't defined we are returning
error currently. Lets 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>
---
 drivers/cpufreq/arm_big_little_dt.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

Patch

diff --git a/drivers/cpufreq/arm_big_little_dt.c b/drivers/cpufreq/arm_big_little_dt.c
index d5ae4d2..173ed05 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 = {