Commit 2d269992 authored Dec 26, 2019 by Stephen Boyd

clk: Warn about critical clks that fail to enable



If we don't warn here users of the CLK_IS_CRITICAL flag may not know
that their clk isn't actually enabled because it silently fails to
enable. Let's print a warning in that case so developers find these
problems faster.

Suggested-by: Jerome Brunet <jbrunet@baylibre.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lkml.kernel.org/r/20200102005503.71923-1-sboyd@kernel.org


Reviewed-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>

parent 12ead774

drivers/clk/clk.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -3427,13 +3427,18 @@ static int __clk_core_init(struct clk_core *core)
		unsigned long flags;

		ret = clk_core_prepare(core);
		if (ret)
		if (ret) {
		pr_warn("%s: critical clk '%s' failed to prepare\n",
		__func__, core->name);
		goto out;
		}

		flags = clk_enable_lock();
		ret = clk_core_enable(core);
		clk_enable_unlock(flags);
		if (ret) {
		pr_warn("%s: critical clk '%s' failed to enable\n",
		__func__, core->name);
		clk_core_unprepare(core);
		goto out;
		}