Re: [linux,dev-5.1 v1] dt-bindings: gpio: aspeed: Add SGPIO support

[Andrew Jeffery]

On Wed, 10 Jul 2019, at 04:23, Rob Herring wrote:
> On Wed, Jul 3, 2019 at 2:01 PM Hongwei Zhang <hongweiz@xxxxxxx> wrote:
> >
> > Add bindings to support SGPIO on AST2400 or AST2500.
> >
> > Signed-off-by: Hongwei Zhang <hongweiz@xxxxxxx>
> > ---
> >  .../devicetree/bindings/gpio/sgpio-aspeed.txt      | 36 ++++++++++++++++++++++
> 
> Is this SGPIO as in the blinky lights for HDDs in servers? If so, that
> has nothing to do with Linux GPIO subsystem.
> 

No, this is just literal serialised GPIO, which can be used with e.g. nexperia
74LV595 / 74LV165 parts.

There is a separate chunk of IP in the SoC that acts as an SFF-8485 (blinky
lights) slave monitor.

Andrew