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
