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4844bdbe91
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: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>