linux-kernel - Re: [PATCH v2 2/2] net: phy: dp83826: support TX data voltage tuning

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Date: Thu, 8 Feb 2024 16:54:17 +0000
From: POPESCU Catalin <catalin.popescu@...ca-geosystems.com>
To: Andrew Lunn <andrew@...n.ch>
CC: "davem@...emloft.net" <davem@...emloft.net>, "kuba@...nel.org"
	<kuba@...nel.org>, "pabeni@...hat.com" <pabeni@...hat.com>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"krzysztof.kozlowski+dt@...aro.org" <krzysztof.kozlowski+dt@...aro.org>,
	"conor+dt@...nel.org" <conor+dt@...nel.org>, "afd@...com" <afd@...com>,
	"hkallweit1@...il.com" <hkallweit1@...il.com>, "linux@...linux.org.uk"
	<linux@...linux.org.uk>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	GEO-CHHER-bsp-development <bsp-development.geo@...ca-geosystems.com>,
	"m.felsch@...gutronix.de" <m.felsch@...gutronix.de>
Subject: Re: [PATCH v2 2/2] net: phy: dp83826: support TX data voltage tuning

On 08.02.24 17:50, Andrew Lunn wrote:
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>> Now, I understand your question 🙂
>> To answer, DP83826_CFG_DAC_MINUS_DEFAULT will indeed leave the register
>> unchanged. However, dp83822 driver exports a PHY callback soft_reset
>> which does a SW reset which actually has the same effect as the HW reset
>> pin according to the datasheet. Since the PAL enforces the call to
>> soft_reset before config_init, in dp83826_config_init we can rely on the
>> registers reset value.
> Great. Please add a version of this to the commit message. That shows
> we did our due diligence and we don't expect any surprises in the
> future.
Sure, I'll update the commit message in v3.
>      Andrew
>
> ---
> pw-bot: cr