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Subject: Re: [PATCH V3 1/3] gpio: Add virtio-gpio driver
To:     Viresh Kumar <viresh.kumar@linaro.org>
Cc:     Geert Uytterhoeven <geert@linux-m68k.org>,
        Linus Walleij <linus.walleij@linaro.org>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Bartosz Golaszewski <bgolaszewski@baylibre.com>,
        "Enrico Weigelt, metux IT consult" <info@metux.net>,
        Viresh Kumar <vireshk@kernel.org>,
        "Michael S. Tsirkin" <mst@redhat.com>,
        Jason Wang <jasowang@redhat.com>,
        Vincent Guittot <vincent.guittot@linaro.org>,
        Bill Mills <bill.mills@linaro.org>,
        =?UTF-8?Q?Alex_Benn=c3=a9e?= <alex.bennee@linaro.org>,
        stratos-dev@op-lists.linaro.org,
        "open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Stefan Hajnoczi <stefanha@redhat.com>,
        "Stefano Garzarella --cc virtualization @ lists . linux-foundation . org" 
        <sgarzare@redhat.com>, virtualization@lists.linux-foundation.org,
        Alistair Strachan <astrachan@google.com>
References: <cover.1623326176.git.viresh.kumar@linaro.org>
 <10442926ae8a65f716bfc23f32339a6b35e51d5a.1623326176.git.viresh.kumar@linaro.org>
 <CACRpkdZV2v2S5z7CZf_8DV=At9-oPSj7RYFH78hWy3ZX37QnDQ@mail.gmail.com>
 <20210611035623.z4f2ynumzozigqnv@vireshk-i7>
 <CAMuHMdVrtSnFpPbB0P3Wxqm1D6vU1_cnh3ypsZJRNF6ueKdAsw@mail.gmail.com>
 <20210611080122.tlkidv6bowuka6fw@vireshk-i7>
 <0478822f-9d10-deb8-86ae-3b4ac3bb0c6c@metux.net>
 <20210614091218.mj5hdx4xhy4vho5x@vireshk-i7>
From:   "Enrico Weigelt, metux IT consult" <lkml@metux.net>
Message-ID: <b7c28e22-31a3-24ea-4317-b5babeccf519@metux.net>
Date:   Mon, 14 Jun 2021 11:29:14 +0200
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On 14.06.21 11:12, Viresh Kumar wrote:
>> Note that this is completely different from my approach that I've posted
>> in autumn last year. Viresh's protocol hasn't much in common with mine.
> 
> The protocol hasn't changed in a sense on how it can be used. 

Sorry, but that's not correct. It's an entirely different protocol,
entirely different signal flow, different data structures, different
queue layout, ... in no way compatible.

The only thing they've got in common is they're both do gpios via virtio.


--mtx

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Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
info@metux.net -- +49-151-27565287