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| author |   Prashant Gaikwad <pgaikwad@nvidia.com> | 2012-12-26 19:16:22 +0530 |
|---|---|---|
| committer |   Mike Turquette <mturquette@linaro.org> | 2013-01-11 19:46:32 -0800 |
| commit | 1af599df6bdad9ee34ae9e50efcda273e12b9d4f (patch) | |
| tree | 56a0395104878ce7a074da8144a44dd4fde66170 /drivers/clk | |
| parent | clk: max77686: Fix return value checking for devm_kzalloc (diff) | |
| download | linux-dev-1af599df6bdad9ee34ae9e50efcda273e12b9d4f.tar.xz linux-dev-1af599df6bdad9ee34ae9e50efcda273e12b9d4f.zip | |
clk: human-readable debugfs clock tree summary
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@nvidia.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Diffstat (limited to 'drivers/clk')
| -rw-r--r-- | 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 eea70da02500..8622b9de7302 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -35,6 +35,67 @@ 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) { @@ -168,12 +229,18 @@ 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) |