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clk: Add clk_parent entry in debugfs 

This allows to easily determine the parent in shell scripts without
parsing more complex files.

Add the clk_parent file for all clks which can have a parent, not just
muxes. This way it can be used to determine the clk tree structure
without parsing more complex files.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Leonard Crestez 2019-06-10 14:06:38 +03:00 committed by Stephen Boyd
parent a188339ca5
commit e5e89247a7
1 changed files with 15 additions and 0 deletions
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15
drivers/clk/clk.c
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@ -3011,6 +3011,17 @@ static int possible_parents_show(struct seq_file *s, void *data)
}
DEFINE_SHOW_ATTRIBUTE(possible_parents);
static int current_parent_show(struct seq_file *s, void *data)
{
struct clk_core *core = s->private;
if (core->parent)
seq_printf(s, "%s\n", core->parent->name);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(current_parent);
static int clk_duty_cycle_show(struct seq_file *s, void *data)
{
struct clk_core *core = s->private;
@ -3043,6 +3054,10 @@ static void clk_debug_create_one(struct clk_core *core, struct dentry *pdentry)
debugfs_create_file("clk_duty_cycle", 0444, root, core,
&clk_duty_cycle_fops);
if (core->num_parents > 0)
debugfs_create_file("clk_parent", 0444, root, core,
&current_parent_fops);
if (core->num_parents > 1)
debugfs_create_file("clk_possible_parents", 0444, root, core,
&possible_parents_fops);