clk_set_parent_by_clk
error = clk_set_parent_by_clk(clk_tx, clk_tx_parent);
rv = clk_set_parent_by_clk(sc->clk_dc, sc->clk_parent);
rv = clk_set_parent_by_clk(sc->clk_hdmi, sc->clk_parent);
rv = clk_set_parent_by_clk(clk, sc->clk_parent);
rv = clk_set_parent_by_clk(sc->clk_cpu_g, sc->clk_pll_p);
rv = clk_set_parent_by_clk(sc->clk_cpu_g, sc->clk_pll_x);
err = clk_set_parent_by_clk(sc->clk_fck, sys_clkin);
err = clk_set_parent_by_clk(sc->clk_fck, sys_clkin);
err = clk_set_parent_by_clk(pruss_ocp_gclk, l3_gclk);
rv = clk_set_parent_by_clk(clk, parent);
int clk_set_parent_by_clk(clk_t clk, clk_t parent);
error = clk_set_parent_by_clk(clk_tx, clk_tx_parent);