clk_core_get_boundaries
clk_core_get_boundaries(core, &req->min_rate, &req->max_rate);
clk_core_get_boundaries(core, &min_rate, &max_rate);
clk_core_get_boundaries(c, &min_rate, &max_rate);
clk_core_get_boundaries(core, &min_rate, &max_rate);
clk_core_get_boundaries(core, &min_rate, &max_rate);
clk_core_get_boundaries(hw->core, min_rate, max_rate);