From e5e89247a74bf35f0bbfd180a46f5bf75c086885 Mon Sep 17 00:00:00 2001 From: Leonard Crestez Date: Mon, 10 Jun 2019 14:06:38 +0300 Subject: [PATCH] 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 Signed-off-by: Stephen Boyd --- drivers/clk/clk.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index aa51756..d21a219 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, + ¤t_parent_fops); + if (core->num_parents > 1) debugfs_create_file("clk_possible_parents", 0444, root, core, &possible_parents_fops); -- 2.7.4