netdev - Re: [RFC] support built-in ethernet phy which needs some mmio accesses

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Message-ID: <b8c29d27-e0a2-4378-ba5f-6d95a438c023@lunn.ch>
Date: Sun, 19 Nov 2023 17:18:49 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Jisheng Zhang <jszhang@...nel.org>
Cc: HeinerKallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	"David S.Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Conor Dooley <conor.dooley@...rochip.com>, netdev@...r.kernel.org,
	linux-riscv@...ts.infradead.org
Subject: Re: [RFC] support built-in ethernet phy which needs some mmio
 accesses

On Sun, Nov 19, 2023 at 09:57:17PM +0800, Jisheng Zhang wrote:
> Hi,
> 
> I want to upstream milkv duo (powered by cv1800b) ethernet support. The SoC
> contains a built-in eth phy which also needs some initialization via.
> mmio access during init. So, I need to do something like this(sol A):

What does this initialisation do?

If you are turning on clocks, write a common clock provider, which the
PHY driver can use. If its a reset, write a reset driver. If its a
regulator, write a regulator driver, etc.

      Andrew