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From:   Brian Masney <bmasney@redhat.com>
To:     sboyd@kernel.org, mturquette@baylibre.com
Cc:     linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] clk: add debug message showing which unused clocks are disabled on boot
Date:   Thu, 17 Nov 2022 05:58:29 -0500
Message-Id: <20221117105829.256717-1-bmasney@redhat.com>
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The clk framework on bootup will automatically disable all unused clocks
on bootup unless the clk_ignore_unused kernel parameter is present.
Let's add a basic debugging log statement here that shows which clocks
are disabled. There is already tracepoint present here as well, but
there's nothing like a simple, good ol' fashioned printk for simplicity.

Signed-off-by: Brian Masney <bmasney@redhat.com>
---
 drivers/clk/clk.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 57b83665e5c3..ddf5a48e72b6 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1352,6 +1352,7 @@ static void __init clk_disable_unused_subtree(struct clk_core *core)
 	 * back to .disable
 	 */
 	if (clk_core_is_enabled(core)) {
+		dev_dbg(core->dev, "Powering off unused clock %s\n", core->name);
 		trace_clk_disable(core);
 		if (core->ops->disable_unused)
 			core->ops->disable_unused(core->hw);
-- 
2.38.1