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authorLeonard Crestez <leonard.crestez@nxp.com>2019-06-10 14:06:38 +0300
committerStephen Boyd <sboyd@kernel.org>2019-06-25 14:53:10 -0700
commite5e89247a74bf35f0bbfd180a46f5bf75c086885 (patch)
tree88f2c28a148ad995a84870baf6b34556502e8e0d /drivers/clk
parenta188339ca5a396acc588e5851ed7e19f66b0ebd9 (diff)
downloadlinux-e5e89247a74bf35f0bbfd180a46f5bf75c086885.tar.bz2
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>
Diffstat (limited to 'drivers/clk')
-rw-r--r--drivers/clk/clk.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index aa51756fd4d6..d21a219deef8 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -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);