linux-kernel - Re: [PATCH v1 5/5] pinctrl: microchip-sgpio: wait until output is actually set

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Message-ID: <20220225165446.GA4704@COLIN-DESKTOP1.localdomain>
Date:   Fri, 25 Feb 2022 08:54:46 -0800
From:   Colin Foster <colin.foster@...advantage.com>
To:     Michael Walle <michael@...le.cc>
Cc:     Horatiu Vultur <horatiu.vultur@...rochip.com>,
        Lars Povlsen <lars.povlsen@...rochip.com>,
        Steen Hegelund <Steen.Hegelund@...rochip.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        UNGLinuxDriver@...rochip.com, linux-arm-kernel@...ts.infradead.org,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 5/5] pinctrl: microchip-sgpio: wait until output is
 actually set

Hi Michael,

On Fri, Feb 25, 2022 at 12:29:50PM +0100, Michael Walle wrote:
> 
> Could you also have a look at the other supported sgpio block,
> the ocelot and the luton? I don't have any register description
> of these.

The current supported Ocelot chips are the VSC7514 (link below) and the
VSC7513. Chapter 6 of this PDF links a second PDF, and you should be
able to find the Serial GPIO definitions in DEVCPU_GCB:SIO_CTRL on page
79 of that PDF.
https://ww1.microchip.com/downloads/en/DeviceDoc/VMDS-10491.pdf

I'm working on support for the VSC7511/7512, so I can run a "does it
work" test, but I likely won't have a setup to test the corner
conditions this patch set is addressing with any confidence.

Colin Foster