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From: Leonard Crestez <leonard.crestez@nxp.com>
To: Stephen Boyd <sboyd@kernel.org>
Cc: Michael Turquette <mturquette@baylibre.com>,
	Peter De Schrijver <pdeschrijver@nvidia.com>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	"linux-clk@vger.kernel.org" <linux-clk@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>
Subject: [PATCH] clk: Add clk_parent entry in debugfs
Date: Fri, 24 May 2019 08:25:25 +0000	[thread overview]
Message-ID: <057720844e78e615e46de34a73b16ffaf7dbfc10.1558686047.git.leonard.crestez@nxp.com> (raw)

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

Add the clk_parent file unconditionally because this information is
useful for more than just muxes.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
---
 drivers/clk/clk.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index aa51756fd4d6..94a93b07dd37 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -3009,10 +3009,21 @@ static int possible_parents_show(struct seq_file *s, void *data)
 
 	return 0;
 }
 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;
 	struct clk_duty *duty = &core->duty;
 
@@ -3040,10 +3051,11 @@ static void clk_debug_create_one(struct clk_core *core, struct dentry *pdentry)
 	debugfs_create_u32("clk_enable_count", 0444, root, &core->enable_count);
 	debugfs_create_u32("clk_protect_count", 0444, root, &core->protect_count);
 	debugfs_create_u32("clk_notifier_count", 0444, root, &core->notifier_count);
 	debugfs_create_file("clk_duty_cycle", 0444, root, core,
 			    &clk_duty_cycle_fops);
+	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);
 
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
From: Leonard Crestez <leonard.crestez@nxp.com>
To: Stephen Boyd <sboyd@kernel.org>
Cc: Peter De Schrijver <pdeschrijver@nvidia.com>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Michael Turquette <mturquette@baylibre.com>,
	"linux-clk@vger.kernel.org" <linux-clk@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>
Subject: [PATCH] clk: Add clk_parent entry in debugfs
Date: Fri, 24 May 2019 08:25:25 +0000	[thread overview]
Message-ID: <057720844e78e615e46de34a73b16ffaf7dbfc10.1558686047.git.leonard.crestez@nxp.com> (raw)

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

Add the clk_parent file unconditionally because this information is
useful for more than just muxes.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
---
 drivers/clk/clk.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index aa51756fd4d6..94a93b07dd37 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -3009,10 +3009,21 @@ static int possible_parents_show(struct seq_file *s, void *data)
 
 	return 0;
 }
 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;
 	struct clk_duty *duty = &core->duty;
 
@@ -3040,10 +3051,11 @@ static void clk_debug_create_one(struct clk_core *core, struct dentry *pdentry)
 	debugfs_create_u32("clk_enable_count", 0444, root, &core->enable_count);
 	debugfs_create_u32("clk_protect_count", 0444, root, &core->protect_count);
 	debugfs_create_u32("clk_notifier_count", 0444, root, &core->notifier_count);
 	debugfs_create_file("clk_duty_cycle", 0444, root, core,
 			    &clk_duty_cycle_fops);
+	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);
 
-- 
2.17.1


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             reply	other threads:[~2019-05-24  8:25 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-24  8:25 Leonard Crestez [this message]
2019-05-24  8:25 ` [PATCH] clk: Add clk_parent entry in debugfs Leonard Crestez
2019-06-07 19:05 ` Stephen Boyd
2019-06-07 19:05   ` Stephen Boyd
2019-06-08  7:26   ` Leonard Crestez
2019-06-08  7:26     ` Leonard Crestez
2019-06-08 12:19     ` Geert Uytterhoeven
2019-06-08 12:19       ` Geert Uytterhoeven
2019-06-08 12:48       ` Leonard Crestez
2019-06-08 12:48         ` Leonard Crestez

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