};
static const struct clk_ops clk_dummy_single_parent_ops = {
+ /*
+ * FIXME: Even though we should probably be able to use
+ * __clk_mux_determine_rate() here, if we use it and call
+ * clk_round_rate() or clk_set_rate() with a rate lower than
+ * what all the parents can provide, it will return -EINVAL.
+ *
+ * This is due to the fact that it has the undocumented
+ * behaviour to always pick up the closest rate higher than the
+ * requested rate. If we get something lower, it thus considers
+ * that it's not acceptable and will return an error.
+ *
+ * It's somewhat inconsistent and creates a weird threshold
+ * between rates above the parent rate which would be rounded to
+ * what the parent can provide, but rates below will simply
+ * return an error.
+ */
+ .determine_rate = __clk_mux_determine_rate_closest,
.set_parent = clk_dummy_single_set_parent,
.get_parent = clk_dummy_single_get_parent,
};