netdev - Re: [RFC PATCH net-next 2/2] net: ti: icssg-prueth: Add support for half duplex operation

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Message-ID: <42e8a2d1-eb7b-4157-86b9-87a9dfb93e83@lunn.ch>
Date: Mon, 4 Sep 2023 16:17:36 +0200
From: Andrew Lunn <andrew@...n.ch>
To: MD Danish Anwar <danishanwar@...com>
Cc: Vignesh Raghavendra <vigneshr@...com>,
	Roger Quadros <rogerq@...nel.org>,
	Jacob Keller <jacob.e.keller@...el.com>,
	Simon Horman <horms@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Rob Herring <robh+dt@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	"David S. Miller" <davem@...emloft.net>,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	netdev@...r.kernel.org, srk@...com, r-gunasekaran@...com
Subject: Re: [RFC PATCH net-next 2/2] net: ti: icssg-prueth: Add support for
 half duplex operation

On Wed, Aug 30, 2023 at 05:01:34PM +0530, MD Danish Anwar wrote:
> This patch adds support for half duplex operation at 10M and 100M link
> speeds for AM654x/AM64x devices.
> - Driver configures rand_seed, a random number, in DMEM HD_RAND_SEED_OFFSET
> field, which will be used by firmware for Back off time calculation.
> - Driver informs FW about half duplex link operation in DMEM
> PORT_LINK_SPEED_OFFSET field by setting bit 7 for 10/100M HD.
> 
> Hence, the half duplex operation depends on board design the
> "ti,half-duplex-capable" property has to be enabled for ICSS-G ports if HW
> is capable to perform half duplex.
> 
> Signed-off-by: MD Danish Anwar <danishanwar@...com>

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

    Andrew