[alsa-devel] [PATCH v5 1/2] ASoC: fsl: Add S/PDIF CPU DAI driver

[Sascha Hauer]

On Sat, Aug 17, 2013 at 02:28:04PM +0200, Tomasz Figa wrote:
> > > > Also I would make this option required. Use a dummy clock for mux
> > > > inputs that are grounded for a specific SoC.
> > > 
> > > Some clocks are not from CCM and we haven't defined in imx6q-clk.txt,
> > > so in most cases we can't provide a phandle for them, eg: spdif_ext.
> > > I think it's a bit hard to force it to be 'required'. An 'optional'
> > > looks more flexible to me and a default one is ensured even if it's
> > > missing.
> > 
> > <&clks 0> is the dummy clock. This can be used for all input clocks not
> > defined by the SoC.
> 
> Where does this assumption come from? Is it documented anywhere?

This is how all i.MX clock bindings currently are. See
Documentation/devicetree/bindings/clock/imx*-clock.txt

Sascha

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