Messages in this thread | | | Date | Wed, 10 Jul 2019 11:30:14 +0930 | From | "Andrew Jeffery" <> | Subject | Re: [linux,dev-5.1 v1] dt-bindings: gpio: aspeed: Add SGPIO support |
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On Wed, 10 Jul 2019, at 04:23, Rob Herring wrote: > On Wed, Jul 3, 2019 at 2:01 PM Hongwei Zhang <hongweiz@ami.com> wrote: > > > > Add bindings to support SGPIO on AST2400 or AST2500. > > > > Signed-off-by: Hongwei Zhang <hongweiz@ami.com> > > --- > > .../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
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