sched-idle: Add a debugfs entry to switch from cpuidle to sched-idleirq-timings-v2

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

1 files changed, 49 insertions, 6 deletions

diff --git a/drivers/cpuidle/debugfs.c b/drivers/cpuidle/debugfs.c
index c5aab983d723..af4f77569d86 100644
--- a/drivers/cpuidle/debugfs.c
+++ b/drivers/cpuidle/debugfs.c
@@ -89,6 +89,48 @@ ssize_t cpuidle_debugfs_write_reset(struct file *file,
 	return size;
 }
 
+static const struct file_operations reset_fops = {
+        .open = simple_open,
+        .write = cpuidle_debugfs_write_reset,
+        .llseek = seq_lseek,
+};
+
+extern void sched_idle_enable(void);
+extern void sched_idle_disable(void);
+extern int sched_idle_enabled(void);
+
+ssize_t cpuidle_debugfs_write_sched_idle(struct file *file,
+					 const char __user *user_buf,
+					 size_t count, loff_t *ppos)
+{
+	ssize_t size;
+	bool enable = false;
+
+	file->private_data = &enable;
+
+	size = debugfs_write_file_bool(file, user_buf, count, ppos);
+	if (size > 0)
+		enable ? sched_idle_enable() : sched_idle_disable();
+
+	return size;
+}
+
+ssize_t cpuidle_debugfs_read_sched_idle(struct file *file,
+					 char __user *user_buf,
+					 size_t count, loff_t *ppos)
+{
+	bool enable = sched_idle_enabled();
+	file->private_data = &enable;
+	return debugfs_read_file_bool(file, user_buf, count, ppos);
+}
+
+static const struct file_operations sched_idle_fops = {
+	.open = simple_open,
+        .write = cpuidle_debugfs_write_sched_idle,
+        .read = cpuidle_debugfs_read_sched_idle,
+        .llseek = seq_lseek,
+};
+
 void cpuidle_debugfs_prediction(struct cpuidle_driver *drv,
 				struct cpuidle_device *dev,
 				s64 duration, int state)
@@ -111,12 +153,6 @@ void cpuidle_debugfs_prediction(struct cpuidle_driver *drv,
 	}
 }
 
-static const struct file_operations reset_fops = {
-        .open = simple_open,
-        .write = cpuidle_debugfs_write_reset,
-        .llseek = seq_lseek,
-};
-
 static int cpuidle_debugfs_stats_show(struct seq_file *m, void *v)
 {
 	int cpu;
@@ -181,6 +217,13 @@ int __init cpuidle_debugfs_init(void)
 				 top_dentry, NULL, &reset_fops))
 		goto out;
 
+	/*
+	 * Switch to sched-idle
+	 */
+	if (!debugfs_create_file("sched-idle", 0200,
+				 top_dentry, NULL, &sched_idle_fops))
+		goto out;
+
 	ret = 0;
 out:
 	if (ret)