최종환 wrote:
>
> From: Colin Cross <ccross@xxxxxxxxxxx>
>
> Add a clock/clock_tree debugfs file that shows the entire clock
> hierarchy including usage counts and rates.
>
> Signed-off-by: Colin Cross <ccross@xxxxxxxxxxx>
> Signed-off-by: Jonghwan Choi <jhbird.choi@xxxxxxxxxxx>
> ---
> arch/arm/plat-samsung/clock.c | 65
> ++++++++++++++++++++++++++++++++++++++++-
> 1 files changed, 64 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm/plat-samsung/clock.c b/arch/arm/plat-samsung/clock.c
> index b7338ce..9392959 100644
> --- a/arch/arm/plat-samsung/clock.c
> +++ b/arch/arm/plat-samsung/clock.c
> @@ -396,6 +396,64 @@ 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,
> "0001-ARM-samsung-clock-add-clock_tree-debugfs-file.patch" 106L, 2832C
> 1,1 Top
> + .read = seq_read,
> + .llseek = seq_lseek,
> + .release = single_release,
> +};
> +
> static int clk_debugfs_register_one(struct clk *c)
> {
> int err;
> @@ -457,13 +515,18 @@ 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)
> --
> 1.7.1
Applied with fixing patch format :(
Thanks.
Best regards,
Kgene.
--
Kukjin Kim <kgene.kim@xxxxxxxxxxx>, Senior Engineer,
SW Solution Development Team, Samsung Electronics Co., Ltd.
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