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Subject[PATCH v5] Common clock: To list active consumers of clocks
Date
This feature lists the clock consumer's name and respective connection
id. Using this feature user can easily check that which user has
acquired and enabled a particular clock.

Usage:
>> cat /sys/kernel/debug/clk/clk_summary
enable prepare protect
duty hardware Connection
clock count count count rate accuracy phase cycle enable consumer Id
------------------------------------------------------------------------------------------------------------------------------
clk_mcasp0_fixed 0 0 0 24576000 0 0 50000 Y deviceless of_clk_get_from_provider
deviceless no_connection_id
clk_mcasp0 0 0 0 24576000 0 0 50000 N simple-audio-card,cpu no_connection_id
deviceless no_connection_id

Co-developed-by: Chinmoy Ghosh <chinmoyghosh2001@gmail.com>
Signed-off-by: Chinmoy Ghosh <chinmoyghosh2001@gmail.com>
Co-developed-by: Mintu Patel <mintupatel89@gmail.com>
Signed-off-by: Mintu Patel <mintupatel89@gmail.com>
Co-developed-by: Vimal Kumar <vimal.kumar32@gmail.com>
Signed-off-by: Vimal Kumar <vimal.kumar32@gmail.com>
Signed-off-by: Vishal Badole <badolevishal1116@gmail.com>
---
drivers/clk/clk.c | 34 ++++++++++++++++++++++++----------
1 file changed, 24 insertions(+), 10 deletions(-)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index bd0b35c..c4aa3b4 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -2952,28 +2952,41 @@ static void clk_summary_show_one(struct seq_file *s, struct clk_core *c,
int level)
{
int phase;
+ struct clk *clk_user;
+ int multi_node = 0;

- seq_printf(s, "%*s%-*s %7d %8d %8d %11lu %10lu ",
+ seq_printf(s, "%*s%-*s %-7d %-8d %-8d %-11lu %-10lu ",
level * 3 + 1, "",
- 30 - level * 3, c->name,
+ 35 - level * 3, c->name,
c->enable_count, c->prepare_count, c->protect_count,
clk_core_get_rate_recalc(c),
clk_core_get_accuracy_recalc(c));

phase = clk_core_get_phase(c);
if (phase >= 0)
- seq_printf(s, "%5d", phase);
+ seq_printf(s, "%-5d", phase);
else
seq_puts(s, "-----");

- seq_printf(s, " %6d", clk_core_get_scaled_duty_cycle(c, 100000));
+ seq_printf(s, " %-6d", clk_core_get_scaled_duty_cycle(c, 100000));

if (c->ops->is_enabled)
- seq_printf(s, " %9c\n", clk_core_is_enabled(c) ? 'Y' : 'N');
+ seq_printf(s, " %5c ", clk_core_is_enabled(c) ? 'Y' : 'N');
else if (!c->ops->enable)
- seq_printf(s, " %9c\n", 'Y');
+ seq_printf(s, " %5c ", 'Y');
else
- seq_printf(s, " %9c\n", '?');
+ seq_printf(s, " %5c ", '?');
+
+ hlist_for_each_entry(clk_user, &c->clks, clks_node) {
+ seq_printf(s, "%*s%-*s %-25s\n",
+ level * 3 + 2 + 105 * multi_node, "",
+ 30,
+ clk_user->dev_id ? clk_user->dev_id : "deviceless",
+ clk_user->con_id ? clk_user->con_id : "no_connection_id");
+
+ multi_node = 1;
+ }
+
}

static void clk_summary_show_subtree(struct seq_file *s, struct clk_core *c,
@@ -2994,9 +3007,10 @@ static int clk_summary_show(struct seq_file *s, void *data)
struct clk_core *c;
struct hlist_head **lists = (struct hlist_head **)s->private;

- seq_puts(s, " enable prepare protect duty hardware\n");
- seq_puts(s, " clock count count count rate accuracy phase cycle enable\n");
- seq_puts(s, "-------------------------------------------------------------------------------------------------------\n");
+ seq_puts(s, " enable prepare protect duty hardware connection\n");
+ seq_puts(s, " clock count count count rate accuracy phase cycle enable consumer id\n");
+ seq_puts(s, "---------------------------------------------------------------------------------------------------------------------------------------------\n");
+

clk_prepare_lock();

--
2.7.4
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