linux-kernel - [PATCH v1] clk: Add enable-state column to clk summary

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Message-Id: <20201104165631.22295-1-digetx@gmail.com>
Date:   Wed,  4 Nov 2020 19:56:31 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>
Cc:     linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1] clk: Add enable-state column to clk summary

Add "enable state" column to the clk summary. It's handy to know actual
hardware state of all clocks for debugging purposes. In conjunction with
clk_ignore_unused, this tells us what unused clocks are left on after
bootloader without disabling the clocks. It's also s useful debugging
information for cases where firmware touches clocks.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/clk/clk.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index f83dac54ed85..07fbdea488bc 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -2931,7 +2931,8 @@ static void clk_summary_show_one(struct seq_file *s, struct clk_core *c,
 	else
 		seq_puts(s, "-----");
 
-	seq_printf(s, " %6d\n", clk_core_get_scaled_duty_cycle(c, 100000));
+	seq_printf(s, " %6d", clk_core_get_scaled_duty_cycle(c, 100000));
+	seq_printf(s, " %7d\n", clk_core_is_enabled(c));
 }
 
 static void clk_summary_show_subtree(struct seq_file *s, struct clk_core *c,
@@ -2950,9 +2951,9 @@ static int clk_summary_show(struct seq_file *s, void *data)
 	struct clk_core *c;
 	struct hlist_head **lists = (struct hlist_head **)s->private;
 
-	seq_puts(s, "                                 enable  prepare  protect                                duty\n");
-	seq_puts(s, "   clock                          count    count    count        rate   accuracy phase  cycle\n");
-	seq_puts(s, "---------------------------------------------------------------------------------------------\n");
+	seq_puts(s, "                                 enable  prepare  protect                                duty  enable\n");
+	seq_puts(s, "   clock                          count    count    count        rate   accuracy phase  cycle   state\n");
+	seq_puts(s, "-----------------------------------------------------------------------------------------------------\n");
 
 	clk_prepare_lock();
 
-- 
2.27.0