netdev - Re: [PATCH v2 4/4] net: dsa: vsc73xx: Assert reset if iCPU is enabled

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Message-ID: <CACRpkdYsA5437Sb8J539AJ=cYtnO2MiD7w7V_Emrmk8dNKbaEQ@mail.gmail.com>
Date:   Thu, 4 Jul 2019 09:22:23 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Pawel Dembicki <paweldembicki@...il.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        netdev <netdev@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 4/4] net: dsa: vsc73xx: Assert reset if iCPU is enabled

On Wed, Jul 3, 2019 at 7:21 PM Pawel Dembicki <paweldembicki@...il.com> wrote:

> Driver allow to use devices with disabled iCPU only.
>
> Some devices have pre-initialised iCPU by bootloader.
> That state make switch unmanaged. This patch force reset
> if device is in unmanaged state. In the result chip lost
> internal firmware from RAM and it can be managed.
>
> Signed-off-by: Pawel Dembicki <paweldembicki@...il.com>

Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

My devices do not have direct access to the reset line so I
can't assert reset no matter how I try, if it works for you, the
code is certainly better like this.

Yours,
Linus Walleij