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Date: Wed, 31 Jan 2024 14:18:39 +0100
From: Andrew Lunn <andrew@lunn.ch>
To: Vineeth Karumanchi <vineeth.karumanchi@amd.com>
Cc: nicolas.ferre@microchip.com, claudiu.beznea@tuxon.dev,
	davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
	pabeni@redhat.com, robh+dt@kernel.org,
	krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org,
	linux@armlinux.org.uk, netdev@vger.kernel.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	git@amd.com
Subject: Re: [PATCH net-next 2/3] dt-bindings: net: cdns,macb: Add
 wol-arp-packet property
Message-ID: <9b4a2c23-5a96-45eb-9bdf-cefc99f25fec@lunn.ch>
References: <20240130104845.3995341-1-vineeth.karumanchi@amd.com>
 <20240130104845.3995341-3-vineeth.karumanchi@amd.com>
 <824aad4d-6b05-4641-b75d-ceaa08b0a4e8@lunn.ch>
 <09ce2e81-01cc-431f-8acb-076a54e5a7e6@amd.com>
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In-Reply-To: <09ce2e81-01cc-431f-8acb-076a54e5a7e6@amd.com>

On Wed, Jan 31, 2024 at 01:09:19PM +0530, Vineeth Karumanchi wrote:
> Hi Andrew,
> 
> 
> On 31/01/24 6:56 am, Andrew Lunn wrote:
> > On Tue, Jan 30, 2024 at 04:18:44PM +0530, Vineeth Karumanchi wrote:
> > > "wol-arp-packet" property enables WOL with ARP packet.
> > > It is an extension to "magic-packet for WOL.
> > 
> > It not clear why this is needed. Is this not a standard feature of the
> > IP? Is there no hardware bit indicating the capability?
> > 
> 
> WOL via both ARP and Magic packet is supported by the IP version on ZU+ and
> Versal. However, user can choose which type of packet to recognize as a WOL
> event - magic packet or ARP.

ethtool says:

           wol p|u|m|b|a|g|s|f|d...
                  Sets Wake-on-LAN options.  Not all devices support this.  The argument to this  option  is  a
                  string of characters specifying which options to enable.
                  p   Wake on PHY activity
                  u   Wake on unicast messages
                  m   Wake on multicast messages
                  b   Wake on broadcast messages
                  a   Wake on ARP
                  g   Wake on MagicPacket™
                  s   Enable SecureOn™ password for MagicPacket™
                  f   Wake on filter(s)
                  d   Disable  (wake  on  nothing).  This option
                      clears all previous options.

So why do we need a DT property?

	Andrew