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Some clients, such as PCIe, may operate at the same clock frequency across different data rates by varying link width. In such cases, frequency alone is not sufficient to uniquely identify an OPP. To support these scenarios, introduce a new API dev_pm_opp_find_key_exact() that allows OPP lookup with different set of keys like freq, level & bandwidth. Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com> [ Viresh: Minor cleanups ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>