linux-kernel - Re: [PATCH v11 3/7] anybus-s: support the Arcx anybus controller

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Message-ID: <CAGngYiXZSaUwrCiqavMGDRb5Vuo2x8fTjDetT00PAjjtrYW+NA@mail.gmail.com>
Date:   Tue, 16 Apr 2019 14:35:54 -0400
From:   Sven Van Asbroeck <thesven73@...il.com>
To:     "Enrico Weigelt, metux IT consult" <lkml@...ux.net>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Lee Jones <lee.jones@...aro.org>, mark.rutland@....com,
        Andreas Färber <afaerber@...e.de>,
        treding@...dia.com, David Lechner <david@...hnology.com>,
        noralf@...nnes.org, johan@...nel.org,
        Michal Simek <monstr@...str.eu>, michal.vokac@...ft.com,
        Arnd Bergmann <arnd@...db.de>,
        Greg KH <gregkh@...uxfoundation.org>, john.garry@...wei.com,
        geert+renesas@...der.be, robin.murphy@....com,
        Paul Gortmaker <paul.gortmaker@...driver.com>,
        sebastien.bourdelin@...oirfairelinux.com, icenowy@...c.io,
        Stuart Yoder <stuyoder@...il.com>,
        "J. Kiszka" <jan.kiszka@...mens.com>, maxime.ripard@...tlin.com,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH v11 3/7] anybus-s: support the Arcx anybus controller

Hi Enrico,

On Tue, Apr 16, 2019 at 1:31 PM Enrico Weigelt, metux IT consult
<lkml@...ux.net> wrote:
>
> How do the anybus host and the CAN stuff relate to each other ?
>

The "CAN stuff" is just a binary power read-out, routed from an external CAN
card, which may or may not be present. The CAN card is not accessed from
within this driver. This situation arises because our h/w developer team
decided to integrate various unrelated pieces of functionality into the
same hardware card (even into the same 8-bit register).

This arcx-anybus controller card has two unrelated pieces of functionality:
1. implements an anybus-s slot
2. implements a power read-out from an external CAN card

This situation is not ideal but it's what we have :)

Sven