linux-kernel - Re: [PATCH 8/8] pch_gbe: Add MinnowBoard support

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Date:	Thu, 27 Jun 2013 22:37:02 -0700
From:	Darren Hart <dvhart@...ux.intel.com>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>, peter.p.waskiewicz.jr@...el.com,
	andriy.shevchenko@...ux.intel.com, danders@...cuitco.com,
	vishal.l.verma@...el.com, "David S. Miller" <davem@...emloft.net>,
	netdev@...r.kernel.org
Subject: Re: [PATCH 8/8] pch_gbe: Add MinnowBoard support

On Tue, 2013-06-25 at 18:53 -0700, Darren Hart wrote:
> The MinnowBoard uses an AR803x PHY with the PCH GBE.
> 
> It does not implement the RGMII 2ns TX clock delay in the trace routing
> nor via strapping. Add a detection method for the board and the PHY and
> enable the tx clock delay via the registers.
> 
> This PHY will hibernate without link for 10 seconds. Ensure the PHY is
> awake for probe and then disable hibernation. A future improvement would
> be to convert pch_gbe to using PHYLIB and making sure we can wake the
> PHY at the necessary times rather than permanently disabling it.
> 
> Use the MinnowBoard PCI subsystem ID to identify the board and setup the
> appropriate callbacks in a new pci_id driver_data structure.
> 


Per the discussion on the minnowboard platform drivers in this series
(which provide the minnow_phy_reset() function), I will be rewriting
this patch to provide its own phy_physical_reset() or similar which will
look like the other two phy functions I've added and will take a GPIO
line as an argument, determined by pci_id.

Please disregard this patch for now.

Thanks,


-- 
Darren Hart
Intel Open Source Technology Center
Yocto Project - Technical Lead - Linux Kernel

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