From: Richard Cochran <richardcochran@gmail.com>
To: Andrew Lunn <andrew@lunn.ch>
Cc: netdev@vger.kernel.org, devicetree@vger.kernel.org,
David Miller <davem@davemloft.net>,
Florian Fainelli <f.fainelli@gmail.com>,
Mark Rutland <mark.rutland@arm.com>,
Miroslav Lichvar <mlichvar@redhat.com>,
Rob Herring <robh+dt@kernel.org>,
Willem de Bruijn <willemb@google.com>
Subject: Re: [PATCH net-next RFC V1 5/5] net: mdio: Add a driver for InES time stamping IP core.
Date: Wed, 21 Mar 2018 14:57:29 -0700 [thread overview]
Message-ID: <20180321215729.engnoxpaympvvdc5@localhost> (raw)
In-Reply-To: <20180321214436.GX24516@lunn.ch>
On Wed, Mar 21, 2018 at 10:44:36PM +0100, Andrew Lunn wrote:
> O.K, so lets do the 20 questions approach.
:)
> As far as i can see, this is not an MDIO device. It is not connected
> to the MDIO bus, it has no MDIO registers, you don't even pass a valid
> MDIO address in device tree.
Right. There might very well be other products out there that *do*
use MDIO commands. I know that there are MII time stamping asics and
ip cores on the market, but I don't know all of their creative design
details.
> It it actually an MII bus snooper? Does it snoop, or is it actually in
> the MII bus, and can modify packets, i.e. insert time stamps as frames
> pass over the MII bus?
It acts like a "snooper" to provide out of band time stamps, but it
also can modify packets when for the one-step functionality.
> When the driver talks about having three ports, does that mean it can
> be on three different MII busses?
Yes.
HTH,
Richard
next prev parent reply other threads:[~2018-03-21 21:57 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-21 18:58 [PATCH net-next RFC V1 0/5] Peer to Peer One-Step time stamping Richard Cochran
2018-03-21 18:58 ` [PATCH net-next RFC V1 1/5] net: Introduce peer to peer one step PTP " Richard Cochran
2018-03-21 20:05 ` Keller, Jacob E
2018-03-21 21:26 ` Richard Cochran
2018-03-21 23:51 ` Keller, Jacob E
2018-03-21 18:58 ` [PATCH net-next RFC V1 2/5] net: phy: Move time stamping interface into the generic mdio layer Richard Cochran
2018-03-21 19:10 ` Florian Fainelli
2018-03-21 21:45 ` Richard Cochran
2018-03-24 16:59 ` Richard Cochran
2018-03-21 18:58 ` [PATCH net-next RFC V1 3/5] net: Introduce field for the MII time stamper Richard Cochran
2018-03-21 19:12 ` Florian Fainelli
2018-03-21 21:51 ` Richard Cochran
2018-03-24 17:01 ` Richard Cochran
2018-03-21 18:58 ` [PATCH net-next RFC V1 4/5] net: Use the generic MII time stamper when available Richard Cochran
2018-03-21 18:58 ` [PATCH net-next RFC V1 5/5] net: mdio: Add a driver for InES time stamping IP core Richard Cochran
2018-03-21 19:33 ` Andrew Lunn
2018-03-21 21:36 ` Richard Cochran
2018-03-21 21:44 ` Andrew Lunn
2018-03-21 21:57 ` Richard Cochran [this message]
2018-03-21 22:16 ` Andrew Lunn
2018-03-21 22:47 ` Richard Cochran
2018-03-21 23:50 ` Andrew Lunn
2018-03-24 17:12 ` Richard Cochran
2018-03-24 18:48 ` Andrew Lunn
2018-03-25 4:51 ` Richard Cochran
2018-03-25 15:59 ` Andrew Lunn
2018-03-25 22:10 ` Richard Cochran
2018-03-25 23:01 ` Florian Fainelli
2018-04-03 3:55 ` Richard Cochran
2018-04-03 13:13 ` Andrew Lunn
2018-04-03 15:02 ` Richard Cochran
2018-03-25 23:01 ` Andrew Lunn
2018-04-03 4:27 ` Richard Cochran
2018-03-25 23:06 ` Andrew Lunn
2018-03-25 22:14 ` Richard Cochran
2018-03-22 0:43 ` Andrew Lunn
2018-03-22 1:57 ` Richard Cochran
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