rk_cru_clock_find
clk = rk_cru_clock_find(sc, "armclkb");
clk = rk_cru_clock_find(sc, param->clk);
pclk = rk_cru_clock_find(sc, param->parent);
clk = rk_cru_clock_find(sc, name);
clk_parent = rk_cru_clock_find(sc, parent);
struct rk_cru_clk *rk_cru_clock_find(struct rk_cru_softc *,
main_parent = rk_cru_clock_find(sc, arm->parents[arm->mux_main]);
alt_parent = rk_cru_clock_find(sc, arm->parents[arm->mux_alt]);
main_parent = rk_cru_clock_find(sc, arm->parents[arm->mux_main]);
alt_parent = rk_cru_clock_find(sc, arm->parents[arm->mux_alt]);
rclk_parent = rk_cru_clock_find(sc, composite->parents[mux]);