1 files changed, 75 insertions, 0 deletions

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 8622b9de7302..593a2e42d4af 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -96,6 +96,76 @@ static const struct file_operations clk_summary_fops = {
         .release        = single_release,
 };
 
+static void clk_dump_one(struct seq_file *s, struct clk *c, int level)
+{
+        if (!c)
+                return;
+
+        seq_printf(s, "\"%s\": { ", c->name);
+        seq_printf(s, "\"enable_count\": %d,", c->enable_count);
+        seq_printf(s, "\"prepare_count\": %d,", c->prepare_count);
+        seq_printf(s, "\"rate\": %lu", c->rate);
+}
+
+static void clk_dump_subtree(struct seq_file *s, struct clk *c, int level)
+{
+        struct clk *child;
+        struct hlist_node *tmp;
+
+        if (!c)
+                return;
+
+        clk_dump_one(s, c, level);
+
+        hlist_for_each_entry(child, tmp, &c->children, child_node) {
+                seq_printf(s, ",");
+                clk_dump_subtree(s, child, level + 1);
+        }
+
+        seq_printf(s, "}");
+}
+
+static int clk_dump(struct seq_file *s, void *data)
+{
+        struct clk *c;
+        struct hlist_node *tmp;
+        bool first_node = true;
+
+        seq_printf(s, "{");
+
+        mutex_lock(&prepare_lock);
+
+        hlist_for_each_entry(c, tmp, &clk_root_list, child_node) {
+                if (!first_node)
+                        seq_printf(s, ",");
+                first_node = false;
+                clk_dump_subtree(s, c, 0);
+        }
+
+        hlist_for_each_entry(c, tmp, &clk_orphan_list, child_node) {
+                seq_printf(s, ",");
+                clk_dump_subtree(s, c, 0);
+        }
+
+        mutex_unlock(&prepare_lock);
+
+        seq_printf(s, "}");
+        return 0;
+}
+
+
+static int clk_dump_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, clk_dump, inode->i_private);
+}
+
+static const struct file_operations clk_dump_fops = {
+        .open           = clk_dump_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
 /* caller must hold prepare_lock */
 static int clk_debug_create_one(struct clk *clk, struct dentry *pdentry)
 {
@@ -241,6 +311,11 @@ static int __init clk_debug_init(void)
         if (!d)
                 return -ENOMEM;
 
+        d = debugfs_create_file("clk_dump", S_IRUGO, rootdir, NULL,
+                                &clk_dump_fops);
+        if (!d)
+                return -ENOMEM;
+
         orphandir = debugfs_create_dir("orphans", rootdir);
 
         if (!orphandir)