netdev - Re: [PATCH resubmit 2] net: fec: Fix FEC_ECR

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Date: Wed, 12 Jun 2024 21:16:13 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Csókás, Bence <csokas.bence@...lan.hu>
Cc: Frank Li <Frank.Li@...escale.com>,
	"David S. Miller" <davem@...emloft.net>, imx@...ts.linux.dev,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Richard Cochran <richardcochran@...il.com>,
	Wei Fang <wei.fang@....com>, Shenwei Wang <shenwei.wang@....com>,
	Clark Wang <xiaoning.wang@....com>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Subject: Re: [PATCH resubmit 2] net: fec: Fix FEC_ECR_EN1588 being cleared on
 link-down

On Tue, Jun 11, 2024 at 10:04:05AM +0200, Csókás, Bence wrote:
> FEC_ECR_EN1588 bit gets cleared after MAC reset in `fec_stop()`, which
> makes all 1588 functionality shut down, and all the extended registers
> disappear, on link-down, making the adapter fall back to compatibility
> "dumb mode". However, some functionality needs to be retained (e.g. PPS)
> even without link.
> 
> Fixes: 6605b730c061 ("FEC: Add time stamping code and a PTP hardware clock")
> Cc: Richard Cochran <richardcochran@...il.com>
> 
> Signed-off-by: Csókás, Bence <csokas.bence@...lan.hu>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew