Re: [PATCH 1/4] documentation: add palmas dts definition

[Stephen Warren]

On 02/28/2013 03:57 AM, Graeme Gregory wrote:
...
> The final but of information that would be needed is some method to pass
> down product_id/design_rev and for a lot of the IP blocks they could be
> made independent of the actual parent.

That should probably be represented in DT itself as differing compatible
values.

I could see the argument that this is SW-probe-able since there's a
register that defines the value. However, any global ID register would
apply to the top-level device, and not the version of any child IP
blocks if there's the possibility of mixing/matching IP blocks. If
there's a dedicated version register for a child IP block, then
presumably it's already part of the child IP block's register space, and
so the driver can read it, and then there perhaps wouldn't be a need to
represent this using different compatible values.
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