linux-kernel - Re: [PATCH 4/6] net: ethernet: ti: cpts: add ptp pps support

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Message-ID: <20161206180857.GA20680@localhost.localdomain>
Date:   Tue, 6 Dec 2016 19:08:57 +0100
From:   Richard Cochran <richardcochran@...il.com>
To:     Grygorii Strashko <grygorii.strashko@...com>
Cc:     "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Mugunthan V N <mugunthanvnm@...com>,
        Sekhar Nori <nsekhar@...com>, linux-kernel@...r.kernel.org,
        linux-omap@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        devicetree@...r.kernel.org, Murali Karicheri <m-karicheri2@...com>,
        Wingman Kwok <w-kwok2@...com>
Subject: Re: [PATCH 4/6] net: ethernet: ti: cpts: add ptp pps support

On Wed, Nov 30, 2016 at 11:05:19AM +0100, Richard Cochran wrote:
> Can you adjust the frequency of the keystone devices in hardware?  If
> so, then please implement it, and just disable PPS for the CPSW.
> 
> The only reason I used the timecounter for frequency adjustment was
> because the am335x HW is broken.  But this shouldn't hold back other
> newer HW without the same silicon flaws.

I am talking here about the ADPLLLJ units.  Are they usable on the
keystone?

If so, please implement the frequency adjustment with them.

Thanks,
Richard