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clk: Show active consumers of clocks in debugfs

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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>
Link: https://lore.kernel.org/r/1669569799-8526-1-git-send-email-badolevishal1116@gmail.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Vishal Badole 2022-11-27 22:53:19 +05:30 committed by Stephen Boyd
parent 0bb80ecc33
commit dcce5cc782
1 changed files with 24 additions and 10 deletions
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34
drivers/clk/clk.c
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@ -3188,28 +3188,41 @@ 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,
@ -3230,9 +3243,10 @@ static int clk_summary_show(struct seq_file *s, void *data)
struct clk_core *c;
struct hlist_head **lists = 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();