Commit 1bd37a46 authored by Leonard Crestez's avatar Leonard Crestez Committed by Stephen Boyd
Browse files

clk: Add clk_min/max_rate entries in debugfs 



Add two files to expose min/max clk rates as determined by
clk_core_get_boundaries, taking all consumer requests into account.

This information does not appear to be otherwise exposed to userspace.

Signed-off-by: default avatarLeonard Crestez <leonard.crestez@nxp.com>
Link: https://lkml.kernel.org/r/68e96af2df96512300604d797ade2088d7e6e496.1562073871.git.leonard.crestez@nxp.com


[sboyd@kernel.org: Drop if statements for JSON printing]
Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent 5f9e832c

drivers/clk/clk.c

+36 −0
Original line number Diff line number Diff line
@@ -2896,15 +2896,21 @@ DEFINE_SHOW_ATTRIBUTE(clk_summary); 


static void clk_dump_one(struct seq_file *s, struct clk_core *c, int level)

{

	unsigned long min_rate, max_rate;



	if (!c)

		return;



	clk_core_get_boundaries(c, &min_rate, &max_rate);



	/* This should be JSON format, i.e. elements separated with a comma */

	seq_printf(s, "\"%s\": { ", c->name);

	seq_printf(s, "\"enable_count\": %d,", c->enable_count);

	seq_printf(s, "\"prepare_count\": %d,", c->prepare_count);

	seq_printf(s, "\"protect_count\": %d,", c->protect_count);

	seq_printf(s, "\"rate\": %lu,", clk_core_get_rate(c));

	seq_printf(s, "\"min_rate\": %lu,", min_rate);

	seq_printf(s, "\"max_rate\": %lu,", max_rate);

	seq_printf(s, "\"accuracy\": %lu,", clk_core_get_accuracy(c));

	seq_printf(s, "\"phase\": %d,", clk_core_get_phase(c));

	seq_printf(s, "\"duty_cycle\": %u",
@@ -3064,6 +3070,34 @@ static int clk_duty_cycle_show(struct seq_file *s, void *data) 
}

DEFINE_SHOW_ATTRIBUTE(clk_duty_cycle);



static int clk_min_rate_show(struct seq_file *s, void *data)

{

	struct clk_core *core = s->private;

	unsigned long min_rate, max_rate;



	clk_prepare_lock();

	clk_core_get_boundaries(core, &min_rate, &max_rate);

	clk_prepare_unlock();

	seq_printf(s, "%lu\n", min_rate);



	return 0;

}

DEFINE_SHOW_ATTRIBUTE(clk_min_rate);



static int clk_max_rate_show(struct seq_file *s, void *data)

{

	struct clk_core *core = s->private;

	unsigned long min_rate, max_rate;



	clk_prepare_lock();

	clk_core_get_boundaries(core, &min_rate, &max_rate);

	clk_prepare_unlock();

	seq_printf(s, "%lu\n", max_rate);



	return 0;

}

DEFINE_SHOW_ATTRIBUTE(clk_max_rate);



static void clk_debug_create_one(struct clk_core *core, struct dentry *pdentry)

{

	struct dentry *root;
@@ -3075,6 +3109,8 @@ static void clk_debug_create_one(struct clk_core *core, struct dentry *pdentry) 
	core->dentry = root;



	debugfs_create_ulong("clk_rate", 0444, root, &core->rate);

	debugfs_create_file("clk_min_rate", 0444, root, core, &clk_min_rate_fops);

	debugfs_create_file("clk_max_rate", 0444, root, core, &clk_max_rate_fops);

	debugfs_create_ulong("clk_accuracy", 0444, root, &core->accuracy);

	debugfs_create_u32("clk_phase", 0444, root, &core->phase);

	debugfs_create_file("clk_flags", 0444, root, core, &clk_flags_fops);

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