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TAPRIO/EST offload support in CPSW2G requires EST scheduler function enabled in CPTS. So this patch add a function to set cycle time for EST scheduler. It also add a function for getting time in ns of PHC clock for taprio qdisc configuration. Mostly to verify if timer update is needed or to get actual state of oper/admin schedule. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>