+ int (*rfree)(struct clk *clock);
+ /**
+ * round_rate() - Adjust a rate to the exact rate a clock can provide.
+ *
+ * @clk: The clock to manipulate.
+ * @rate: Desidered clock rate in Hz.
+ * @return rounded rate in Hz, or -ve error code.
+ */
+ ulong (*round_rate)(struct clk *clk, ulong rate);