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Message-ID: <20240102075807.1a4cac92@kernel.org>
Date: Tue, 2 Jan 2024 07:58:07 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: fuyao <fuyao@...erm.com>
Cc: Jernej Škrabec <jernej.skrabec@...il.com>, Alexandre
 Torgue <alexandre.torgue@...s.st.com>, Jose Abreu <joabreu@...opsys.com>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Chen-Yu Tsai
 <wens@...e.org>, Samuel Holland <samuel@...lland.org>, Maxime Coquelin
 <mcoquelin.stm32@...il.com>, netdev@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
 linux-stm32@...md-mailman.stormreply.com, linux-kernel@...r.kernel.org,
 麦健建 <maijianzhang@...winnertech.com>
Subject: Re: [PATCH] gmac: sun8i: r40: add gmac tx_delay support

On Thu, 21 Dec 2023 15:16:54 +0800 fuyao wrote:
> I don't see it in the user manual also.
> 
> it works fine in 100M, but it doesn't work good in 1G without tx_delay
> in my board.
> 
> Read the sdk from allwinner I found in:
> 
> https://sourcegraph.com/github.com/tinalinux/linux-3.10/-/blob/arch/arm/boot/dts/sun8iw11p1.dtsi?L1826
> https://sourcegraph.com/github.com/tinalinux/linux-3.10@r40-v1.y/-/blob/drivers/net/ethernet/allwinner/sunxi-gmac.c?L877
> 
> And I add it to my board, it works fine.
> 
> So, I think it may be exist register but not documented.

Unless Allwinner can chime in we should at least document the situation
clearly in the commit message (incl. what HW+config was tested, exactly)
and add a comment in the code?
-- 
pw-bot: cr

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