linux-kernel - Re: [PATCH 1/8] net: phy: Introduce Qualcomm IPQ5018 internal PHY driver

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Date: Wed, 24 Jan 2024 00:15:37 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Ziyang Huang <hzyitc@...look.com>
Cc: mcoquelin.stm32@...il.com, alexandre.torgue@...s.st.com,
	richardcochran@...il.com, p.zabel@...gutronix.de,
	matthias.bgg@...il.com, angelogioacchino.delregno@...labora.com,
	linux-kernel@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH 1/8] net: phy: Introduce Qualcomm IPQ5018 internal PHY
 driver

> After rechecking the vendor code, you are right. The only special thing of
> this device is that it's a combined device of UNIPHY and at803x general phy.
> So it needs the UNIPHY initialization sequence. But for the PHY part, it's
> almost same as others, just has some special registers. I will merge it into
> at803x driver.

The UNIPHY is a separate driver, its a generic PHY driver? Can we keep
them separate for this internal PHY as well?

The initialisation sequence is what is going to be most 'interesting'
here. How UNIPHY, this PHY and the GCC all come together to make it
work. But for the moment, i think its best the PHY driver controls its
own clock input and reset, using standard Linux APIs, once the driver
has probed via compatible IDs.

       Andrew