Commit 4844bdbe authored by Dmitry Osipenko's avatar Dmitry Osipenko Committed by Viresh Kumar
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PM / devfreq: tegra30: Check whether clk_round_rate() returns zero rate 



EMC clock is always-on and can't be zero. Check whether clk_round_rate()
returns zero rate and error out if it does. It can return zero if clock
tree isn't initialized properly.

Acked-by: default avatarChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: default avatarDmitry Osipenko <digetx@gmail.com>
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
parent 68b79f28

drivers/devfreq/tegra30-devfreq.c

+2 −2
Original line number Diff line number Diff line
@@ -891,9 +891,9 @@ static int tegra_devfreq_probe(struct platform_device *pdev) 
		return err;



	rate = clk_round_rate(tegra->emc_clock, ULONG_MAX);

	if (rate < 0) {

	if (rate <= 0) {

		dev_err(&pdev->dev, "Failed to round clock rate: %ld\n", rate);

		return rate;

		return rate ?: -EINVAL;

	}



	tegra->max_freq = rate / KHZ;