netdev - Re: [PATCH v2 net-next] net: dsa: sja1105: Switch to hardware operations for PTP

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Message-Id: <20191018.125554.337602298468767216.davem@davemloft.net>
Date:   Fri, 18 Oct 2019 12:55:54 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     olteanv@...il.com
Cc:     richardcochran@...il.com, andrew@...n.ch, f.fainelli@...il.com,
        vivien.didelot@...il.com, jakub.kicinski@...ronome.com,
        netdev@...r.kernel.org
Subject: Re: [PATCH v2 net-next] net: dsa: sja1105: Switch to hardware
 operations for PTP

From: Vladimir Oltean <olteanv@...il.com>
Date: Wed, 16 Oct 2019 21:41:02 +0300

> Adjusting the hardware clock (PTPCLKVAL, PTPCLKADD, PTPCLKRATE) is a
> requirement for the auxiliary PTP functionality of the switch
> (TTEthernet, PPS input, PPS output).
> 
> Therefore we need to switch to using these registers to keep a
> synchronized time in hardware, instead of the timecounter/cyclecounter
> implementation, which is reliant on the free-running PTPTSCLK.
> 
> Signed-off-by: Vladimir Oltean <olteanv@...il.com>

Applied, thanks.