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From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
To: Parshuram Raju Thombare <pthombar@cadence.com>
Cc: Andrew Lunn <andrew@lunn.ch>,
	"nicolas.ferre@microchip.com" <nicolas.ferre@microchip.com>,
	"davem@davemloft.net" <davem@davemloft.net>,
	"f.fainelli@gmail.com" <f.fainelli@gmail.com>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"hkallweit1@gmail.com" <hkallweit1@gmail.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Rafal Ciepiela <rafalc@cadence.com>,
	Anil Joy Varughese <aniljoy@cadence.com>,
	Piotr Sroka <piotrs@cadence.com>
Subject: Re: [PATCH v4 4/5] net: macb: add support for high speed interface
Date: Tue, 25 Jun 2019 11:51:01 +0100	[thread overview]
Message-ID: <20190625105101.xvcwgt3jh5pk7p2x@shell.armlinux.org.uk> (raw)
In-Reply-To: <SN2PR07MB2480DBE64F2550C0135335EEC1E30@SN2PR07MB2480.namprd07.prod.outlook.com>

On Tue, Jun 25, 2019 at 08:26:29AM +0000, Parshuram Raju Thombare wrote:
> Hi Andrew,
> 
> >What i'm saying is that the USXGMII rate is fixed. So why do you need a device
> >tree property for the SERDES rate?
> This is based on Cisco USXGMII specification, it specify USXGMII 5G and USXGMII 10G.
> Sorry I can't share that document here.

The closed nature of the USXGMII spec makes it very hard for us to know
whether your implementation is correct or not.

I have some documentation which suggests that USVGMII is a USXGMII link
running at "5GR" rate as opposed to USXGMII running at "10GR" rate.

So, I think 5G mode should be left out until it becomes clear that (a)
we should specify it as USXGMII with a 5G rate, or as USVGMII.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up
According to speedtest.net: 11.9Mbps down 500kbps up

  reply	other threads:[~2019-06-25 10:51 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-23  9:16 [PATCH v4 0/5] net: macb: cover letter Parshuram Thombare
2019-06-23  9:17 ` [PATCH v4 1/5] net: macb: add phylink support Parshuram Thombare
2019-06-23 10:08   ` Russell King - ARM Linux admin
2019-06-24  6:20     ` Parshuram Raju Thombare
2019-06-23  9:23 ` [PATCH v4 2/5] net: macb: add support for sgmii MAC-PHY interface Parshuram Thombare
2019-06-23 10:12   ` Russell King - ARM Linux admin
2019-06-24  6:35     ` Parshuram Raju Thombare
2019-06-24  9:35       ` Russell King - ARM Linux admin
2019-06-24 10:14         ` Parshuram Raju Thombare
2019-06-24 10:22           ` Russell King - ARM Linux admin
2019-06-24 10:32             ` Parshuram Raju Thombare
2019-06-23  9:23 ` [PATCH v4 3/5] net: macb: add support for c45 PHY Parshuram Thombare
2019-06-23 10:12   ` Russell King - ARM Linux admin
2019-06-24  6:47     ` Parshuram Raju Thombare
2019-06-24  9:42       ` Russell King - ARM Linux admin
2019-06-24 10:19         ` Parshuram Raju Thombare
2019-06-23  9:23 ` [PATCH v4 4/5] net: macb: add support for high speed interface Parshuram Thombare
2019-06-23 15:09   ` Andrew Lunn
2019-06-24  6:52     ` Parshuram Raju Thombare
2019-06-24 13:13       ` Andrew Lunn
2019-06-25  8:26         ` Parshuram Raju Thombare
2019-06-25 10:51           ` Russell King - ARM Linux admin [this message]
2019-06-25 11:23             ` Parshuram Raju Thombare
2019-06-23  9:24 ` [PATCH v4 5/5] net: macb: parameter added to cadence ethernet controller DT binding Parshuram Thombare

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