netdev - RE: [PATCH] net: fec: ptp: fix convergence issue to support LinuxPTP stack

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Date:	Wed, 15 Oct 2014 01:30:41 +0000
From:	"fugang.duan@...escale.com" <fugang.duan@...escale.com>
To:	Richard Cochran <richardcochran@...il.com>,
	"Frank.Li@...escale.com" <Frank.Li@...escale.com>
CC:	David Miller <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"bhutchings@...arflare.com" <bhutchings@...arflare.com>
Subject: RE: [PATCH] net: fec: ptp: fix convergence issue to support LinuxPTP
 stack

From: Richard Cochran <richardcochran@...il.com> Sent: Wednesday, October 15, 2014 2:40 AM
>To: Li Frank-B20596
>Cc: David Miller; Duan Fugang-B38611; netdev@...r.kernel.org;
>bhutchings@...arflare.com
>Subject: Re: [PATCH] net: fec: ptp: fix convergence issue to support
>LinuxPTP stack
>
>Frank,
>
>On Tue, Oct 14, 2014 at 06:27:28PM +0000, Frank.Li@...escale.com wrote:
>> Fugang's patch fix the problem existed in MX6SX platform.
>
>You say that Fugang's patch fixes a quirk in the SX device.
>
>But he said that the user's manual tells us to wait for some status bits
>to clear. (See the third line, with the 'while' key word).
>
>> > > On Tue, Oct 14, 2014 at 01:39:47PM +0800, Fugang Duan wrote:
>> > >> IEEE 1588 module has one hw issue in capturing the ATVR register.
>> > >> According to the user manual it is:
>> > >> 		ENET0->ATCR |= ENET_ATCR_CAPTURE_MASK;
>> > >> 		while(ENET0->ATCR & ENET_ATCR_CAPTURE_MASK);
>> > >> 		ts_counter_ns = ENET0->ATVR;
>
>That applies to all IMX devices, doesn't it?
>In any case, Fugang's change log is not clear.
>
>Confused,
>Richard

Pls read the commit log in entire ?

Regrads,
Andy
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