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Message-ID: <20230614211657.2c3ljwnlng7vxamz@skbuf>
Date:   Thu, 15 Jun 2023 00:16:57 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     Arınç ÜNAL <arinc.unal@...nc9.com>
Cc:     Daniel Golle <daniel@...rotopia.org>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Russell King <linux@...linux.org.uk>,
        Frank Wunderlich <frank-w@...lic-files.de>,
        Bartel Eerdekens <bartel.eerdekens@...stell8.be>,
        mithat.guner@...ont.com, erkin.bozoglu@...ont.com,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH net v4 4/7] net: dsa: mt7530: fix handling of BPDUs on
 MT7530 switch

On Thu, Jun 15, 2023 at 12:05:44AM +0300, Arınç ÜNAL wrote:
> On 14.06.2023 23:50, Vladimir Oltean wrote:
> > Where have you seen the BPC register in the memory map of MT7530 or MT7621?
> 
> I did not somehow dump the memory map of the switch hardware and confirm the
> BPC register is there, if that's what you're asking.

I mean to say that I looked at

MT7530 Giga Switch programming guide.pdf
MT7621 Giga Switch Programming Guide.pdf
MT7621_ProgrammingGuide_GSW_v01.pdf

and I did not find this register.

> However, I can confirm the register is there and identical across all MT7530
> variants. I have tested the function of the register on the MCM MT7530 on
> the MT7621 SoC and the standalone MT7530. The register is also described on
> the document MT7620 Programming Guide v1.0, page 262.

Interesting. I did not have that one. Hard to keep up.

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