Commit 62a041a4 authored Dec 16, 2014 by Dmitry Torokhov Committed by Rafael J. Wysocki Dec 18, 2014

cpufreq-dt: defer probing if OPP table is not ready



cpufreq-dt driver supports mode when OPP table is provided by platform
code and not device tree. However on certain platforms code that fills
OPP table may run after cpufreq driver tries to initialize, so let's
report -EPROBE_DEFER if we do not find any entires in OPP table for the
CPU.

Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

parent 437574c9

drivers/cpufreq/cpufreq-dt.c

+11 −0

Original line number	Diff line number	Diff line
		@@ -211,6 +211,17 @@ static int cpufreq_init(struct cpufreq_policy *policy)
		/* OPPs might be populated at runtime, don't check for error here */
		of_init_opp_table(cpu_dev);

		/*
		* But we need OPP table to function so if it is not there let's
		* give platform code chance to provide it for us.
		*/
		ret = dev_pm_opp_get_opp_count(cpu_dev);
		if (ret <= 0) {
		pr_debug("OPP table is not ready, deferring probe\n");
		ret = -EPROBE_DEFER;
		goto out_free_opp;
		}

		priv = kzalloc(sizeof(*priv), GFP_KERNEL);
		if (!priv) {
		ret = -ENOMEM;

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