# Re: \[PATCH 4/6\] net: ethernet: ti: cpts: add ptp pps support

- From: Grygorii Strashko \<grygorii.strashko@ti.com\>
- Date: 2016-12-06 22:34:16 
- List: netdev
- Page: https://ratatoskr.run/netdev/2016/12/4890330
- Thread: https://ratatoskr.run/netdev/2016/11/4884778/t.md

```text


On 12/06/2016 12:08 PM, Richard Cochran wrote:
> 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.
>

No, I think it's not impossible (at least as I know now).
i'll drop this patch for now.

By the way, I've tested am335 (BBB)+ HW_TS_PUSH + PWM.
Seems works.

-- 
regards,
-grygorii
```