From: "Andrew Jeffery" <andrew@aj.id.au>
To: "Rob Herring" <robh+dt@kernel.org>, "Hongwei Zhang" <hongweiz@ami.com>
Cc: devicetree@vger.kernel.org, "Joel Stanley" <joel@jms.id.au>,
"Linus Walleij" <linus.walleij@linaro.org>,
"Mark Rutland" <mark.rutland@arm.com>,
linux-aspeed@lists.ozlabs.org,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [linux,dev-5.1 v1] dt-bindings: gpio: aspeed: Add SGPIO support
Date: Wed, 10 Jul 2019 11:30:14 +0930 [thread overview]
Message-ID: <90c0c965-00ae-4f7a-a6f5-258572398bb0@www.fastmail.com> (raw)
In-Reply-To: <CAL_Jsq+0z4OZ7qbaiUva1v5xCKXpsaPBZ9tj_M4HbEihsU_MfA@mail.gmail.com>
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
next prev parent reply other threads:[~2019-07-10 2:00 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-03 20:01 [linux,dev-5.1 v1] dt-bindings: gpio: aspeed: Add SGPIO support Hongwei Zhang
2019-07-09 18:53 ` Rob Herring
2019-07-10 2:00 ` Andrew Jeffery [this message]
2019-07-10 2:16 ` Andrew Jeffery
2019-07-12 20:18 ` Hongwei Zhang
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