[PATCH 4/9] clk: sunxi-ng: mux: Add support for mux tables

[Jean-Francois Moine]

On Wed, 27 Jul 2016 09:40:20 +0200
Maxime Ripard <maxime.ripard at free-electrons.com> wrote:

> > > Parenting functions would also not work as expected,
> > > clk_hw_get_parent_by_index being the obvious example, in that case
> > > returning the empty string for an invalid parent, while it should
> > > really return NULL.
> > 
> > I don't see why the clock should be orphan.
> > Then, when a parent is "", clk_hw_get_parent_by_index() returns NULL.
> 
> Why? It should return NULL when there's no parent, while you
> explicitly registered a parent.

"" is not an existing parent. It could be "none" / "dum" / "toto" / ...
with the same result: 'this index cannot be used in mux'.

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