netdev - Re: [Uclinux-dist-devel] [PATCH 1/9] netdev: bfin

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Message-ID: <AANLkTikcdpIlZAE-AwahNie8KOys7jIhiNb9kiT_B7Av@mail.gmail.com>
Date:	Tue, 11 May 2010 17:03:24 -0400
From:	Mike Frysinger <vapier.adi@...il.com>
To:	Richard Cochran <richardcochran@...il.com>
Cc:	netdev@...r.kernel.org, Barry Song <barry.song@...log.com>,
	"David S. Miller" <davem@...emloft.net>,
	uclinux-dist-devel@...ckfin.uclinux.org
Subject: Re: [Uclinux-dist-devel] [PATCH 1/9] netdev: bfin_mac: add support 
	for IEEE 1588 PTP

On Tue, May 11, 2010 at 03:07, Richard Cochran wrote:
> On Mon, May 10, 2010 at 11:39:06AM -0400, Mike Frysinger wrote:
>> diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c
>> index 587f93c..6a9519f 100644
>> --- a/drivers/net/bfin_mac.c
>> +++ b/drivers/net/bfin_mac.c
> ...
>> +#define PTP_CLK 25000000
>> +
>> +static void bfin_mac_hwtstamp_init(struct net_device *netdev)
>> +{
>> +     struct bfin_mac_local *lp = netdev_priv(netdev);
>> +     u64 append;
>> +
>> +     /* Initialize hardware timer */
>> +     append = PTP_CLK * (1ULL << 32);
>> +     do_div(append, get_sclk());
>> +     bfin_write_EMAC_PTP_ADDEND((u32)append);
>
> It appears that one can tune this PTP clock.
>
> I recently posted a suggestion for a PTP clock class driver. Would you
> care to take a look at that and say whether that API would also work
> for the blackfin?

i'm guessing you mean:
http://thread.gmane.org/gmane.linux.network/159179
http://thread.gmane.org/gmane.linux.network/159180
http://thread.gmane.org/gmane.linux.network/159181
http://thread.gmane.org/gmane.linux.network/159182

Barry: could you take a look please ?
-mike
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