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Commit 87ec7030 authored by Vivek Aknurwar's avatar Vivek Aknurwar
Browse files

clk: Print enabled clock tree when cpu/cluster enters LPM level 



When idle, cpu/cluster can enter various LPM levels
and can be blocked by certain clk/clks as clks
are voted on. Printed clk tree in path of cpu/cluster entering
one of LPM level, helps to know/debug on what is blocking
cpu/cluster entering LPM.

Change-Id: I194c09fb65783c76628aae5702be5a53fa7001b5
Signed-off-by: default avatarVivek Aknurwar <viveka@codeaurora.org>
parent c28e8b3a

drivers/clk/clk.c

+15 −9
Original line number Diff line number Diff line
@@ -3268,10 +3268,12 @@ static void clk_debug_unregister(struct clk_core *core) 
}



#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG

#define clock_debug_output(m, fmt, ...)		\

#define clock_debug_output(m, c, fmt, ...)		\

do {							\

	if (m)						\

		seq_printf(m, fmt, ##__VA_ARGS__);	\

	else if (c)					\

		pr_cont(fmt, ##__VA_ARGS__);		\

	else						\

		pr_info(fmt, ##__VA_ARGS__);		\

} while (0)
@@ -3284,28 +3286,29 @@ static int clock_debug_print_clock(struct clk_core *c, struct seq_file *s) 
	if (!c || !c->prepare_count)

		return 0;



	clock_debug_output(s, 0, "    ");



	clk = c->hw->clk;



	do {

		c = clk->core;

		if (c->ops->list_rate_vdd_level)

			clock_debug_output(s, "%s%s:%u:%u [%ld, %d]", start,

			clock_debug_output(s, 1, "%s%s:%u:%u [%ld, %d]", start,

				c->name,

				c->prepare_count,

				c->enable_count,

				c->rate,

				c->ops->list_rate_vdd_level(c->hw, c->rate));

		else

			clock_debug_output(s, "%s%s:%u:%u [%ld]", start,

			clock_debug_output(s, 1, "%s%s:%u:%u [%ld]", start,

				c->name,

				c->prepare_count,

				c->enable_count,

				c->rate);

		start = " -> ";

	} while (s && (clk = clk_get_parent(clk)));

	} while ((clk = clk_get_parent(clk)));



	if (s)

		clock_debug_output(s, "\n");

	clock_debug_output(s, 1, "\n");



	return 1;

}
@@ -3318,21 +3321,23 @@ static void clock_debug_print_enabled_clocks(struct seq_file *s) 
	struct clk_core *core;

	int cnt = 0;



	clock_debug_output(s, "Enabled clocks:\n");

	clock_debug_output(s, 0, "Enabled clocks:\n");



	hlist_for_each_entry(core, &clk_debug_list, debug_node)

		cnt += clock_debug_print_clock(core, s);



	if (cnt)

		clock_debug_output(s, "Enabled clock count: %d\n", cnt);

		clock_debug_output(s, 0, "Enabled clock count: %d\n", cnt);

	else

		clock_debug_output(s, "No clocks enabled.\n");

		clock_debug_output(s, 0, "No clocks enabled.\n");

}



static int enabled_clocks_show(struct seq_file *s, void *unused)

{

	mutex_lock(&clk_debug_lock);



	clock_debug_print_enabled_clocks(s);



	mutex_unlock(&clk_debug_lock);



	return 0;
@@ -3365,6 +3370,7 @@ void clock_debug_print_enabled(void) 
		return;



	clock_debug_print_enabled_clocks(NULL);



	mutex_unlock(&clk_debug_lock);

}

EXPORT_SYMBOL(clock_debug_print_enabled);