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Diffstat (limited to 'arch/arm/plat-samsung/clock.c')
-rw-r--r--arch/arm/plat-samsung/clock.c75
1 files changed, 73 insertions, 2 deletions
diff --git a/arch/arm/plat-samsung/clock.c b/arch/arm/plat-samsung/clock.c
index 012bbd0b8d81..47c9fad43f00 100644
--- a/arch/arm/plat-samsung/clock.c
+++ b/arch/arm/plat-samsung/clock.c
@@ -389,6 +389,72 @@ int __init s3c24xx_register_baseclocks(unsigned long xtal)
static struct dentry *clk_debugfs_root;
+static void clock_tree_show_one(struct seq_file *s, struct clk *c, int level)
+{
+ struct clk *child;
+ const char *state;
+ char buf[255] = { 0 };
+ int n = 0;
+
+ if (c->name)
+ n = snprintf(buf, sizeof(buf) - 1, "%s", c->name);
+
+ if (c->devname)
+ n += snprintf(buf + n, sizeof(buf) - 1 - n, ":%s", c->devname);
+
+ state = (c->usage > 0) ? "on" : "off";
+
+ seq_printf(s, "%*s%-*s %-6s %-3d %-10lu\n",
+ level * 3 + 1, "",
+ 50 - level * 3, buf,
+ state, c->usage, clk_get_rate(c));
+
+ list_for_each_entry(child, &clocks, list) {
+ if (child->parent != c)
+ continue;
+
+ clock_tree_show_one(s, child, level + 1);
+ }
+}
+
+static int clock_tree_show(struct seq_file *s, void *data)
+{
+ struct clk *c;
+ unsigned long flags;
+
+ seq_printf(s, " clock state ref rate\n");
+ seq_printf(s, "----------------------------------------------------\n");
+
+ spin_lock_irqsave(&clocks_lock, flags);
+
+ list_for_each_entry(c, &clocks, list)
+ if (c->parent == NULL)
+ clock_tree_show_one(s, c, 0);
+
+ spin_unlock_irqrestore(&clocks_lock, flags);
+ return 0;
+}
+
+static int clock_tree_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, clock_tree_show, inode->i_private);
+}
+
+static const struct file_operations clock_tree_fops = {
+ .open = clock_tree_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int clock_rate_show(void *data, u64 *val)
+{
+ struct clk *c = data;
+ *val = clk_get_rate(c);
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(clock_rate_fops, clock_rate_show, NULL, "%llu\n");
+
static int clk_debugfs_register_one(struct clk *c)
{
int err;
@@ -411,7 +477,7 @@ static int clk_debugfs_register_one(struct clk *c)
goto err_out;
}
- d = debugfs_create_u32("rate", S_IRUGO, c->dent, (u32 *)&c->rate);
+ d = debugfs_create_file("rate", S_IRUGO, c->dent, c, &clock_rate_fops);
if (!d) {
err = -ENOMEM;
goto err_out;
@@ -446,13 +512,18 @@ static int __init clk_debugfs_init(void)
{
struct clk *c;
struct dentry *d;
- int err;
+ int err = -ENOMEM;
d = debugfs_create_dir("clock", NULL);
if (!d)
return -ENOMEM;
clk_debugfs_root = d;
+ d = debugfs_create_file("clock_tree", S_IRUGO, clk_debugfs_root, NULL,
+ &clock_tree_fops);
+ if (!d)
+ goto err_out;
+
list_for_each_entry(c, &clocks, list) {
err = clk_debugfs_register(c);
if (err)