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Date: Fri, 11 Jan 2013 19:54:31 -0800
From: Mike Turquette <mturquette@...aro.org>
To: Prashant Gaikwad <pgaikwad@...dia.com>, <swarren@...dotorg.org>
Cc: <linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
Prashant Gaikwad <pgaikwad@...dia.com>
Subject: Re: [PATCH 1/2] clk: Add debug clk summary
Quoting Prashant Gaikwad (2012-12-26 05:46:22)
> Adds debug file "clk_summary" in /sys/kernel/debug/clk dir.
> It helps to view all the clock registered in human-readable format.
>
> For example:
> clock enable_cnt prepare_cnt rate
> ---------------------------------------------------------------------
> i2s0_sync 0 0 24000000
> spdif_in_sync 0 0 24000000
> spdif_mux 0 0 24000000
> spdif 0 0 24000000
> spdif_doubler 0 0 48000000
> spdif_div 0 0 48000000
> spdif_2x 0 0 48000000
> clk_32k 2 2 32768
> blink_override 1 1 32768
> blink 1 1 32768
> clk_m 2 2 12000000
> clk_out_3_mux 0 0 12000000
> clk_out_3 0 0 12000000
> pll_ref 3 3 12000000
> pll_e_mux 0 0 12000000
> pll_e 0 0 100000000
> cml0 0 0 100000000
> cml1 0 0 100000000
> pciex 0 0 100000000
> pll_d2 0 0 1000000
> pll_d2_out0 0 0 500000
> pll_d 0 0 1000000
> pll_d_out0 0 0 500000
> dsib_mux 0 0 500000
> dsib 0 0 500000
> dsia 0 0 500000
>
> Signed-off-by: Prashant Gaikwad <pgaikwad@...dia.com>
Thanks for the respin of patch #1 and for generating the JSON output
format in patch #2. I've taken both of these into clk-next.
Regards,
Mike
> ---
> drivers/clk/clk.c | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 files changed, 67 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> index 56e4495e..d79c088 100644
> --- a/drivers/clk/clk.c
> +++ b/drivers/clk/clk.c
> @@ -34,6 +34,67 @@ static struct dentry *rootdir;
> static struct dentry *orphandir;
> static int inited = 0;
>
> +static void clk_summary_show_one(struct seq_file *s, struct clk *c, int level)
> +{
> + if (!c)
> + return;
> +
> + seq_printf(s, "%*s%-*s %-11d %-12d %-10lu",
> + level * 3 + 1, "",
> + 30 - level * 3, c->name,
> + c->enable_count, c->prepare_count, c->rate);
> + seq_printf(s, "\n");
> +}
> +
> +static void clk_summary_show_subtree(struct seq_file *s, struct clk *c,
> + int level)
> +{
> + struct clk *child;
> + struct hlist_node *tmp;
> +
> + if (!c)
> + return;
> +
> + clk_summary_show_one(s, c, level);
> +
> + hlist_for_each_entry(child, tmp, &c->children, child_node)
> + clk_summary_show_subtree(s, child, level + 1);
> +}
> +
> +static int clk_summary_show(struct seq_file *s, void *data)
> +{
> + struct clk *c;
> + struct hlist_node *tmp;
> +
> + seq_printf(s, " clock enable_cnt prepare_cnt rate\n");
> + seq_printf(s, "---------------------------------------------------------------------\n");
> +
> + mutex_lock(&prepare_lock);
> +
> + hlist_for_each_entry(c, tmp, &clk_root_list, child_node)
> + clk_summary_show_subtree(s, c, 0);
> +
> + hlist_for_each_entry(c, tmp, &clk_orphan_list, child_node)
> + clk_summary_show_subtree(s, c, 0);
> +
> + mutex_unlock(&prepare_lock);
> +
> + return 0;
> +}
> +
> +
> +static int clk_summary_open(struct inode *inode, struct file *file)
> +{
> + return single_open(file, clk_summary_show, inode->i_private);
> +}
> +
> +static const struct file_operations clk_summary_fops = {
> + .open = clk_summary_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)
> {
> @@ -167,12 +228,18 @@ static int __init clk_debug_init(void)
> {
> struct clk *clk;
> struct hlist_node *tmp;
> + struct dentry *d;
>
> rootdir = debugfs_create_dir("clk", NULL);
>
> if (!rootdir)
> return -ENOMEM;
>
> + d = debugfs_create_file("clk_summary", S_IRUGO, rootdir, NULL,
> + &clk_summary_fops);
> + if (!d)
> + return -ENOMEM;
> +
> orphandir = debugfs_create_dir("orphans", rootdir);
>
> if (!orphandir)
> --
> 1.7.4.1
--
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