Re: [Linuxptp-users] PTP4L - i.MX6 implementation question

[Jan D. <jan...@gm...>]

2017-03-02 6:36 GMT+01:00 Richard Cochran <ric...@gm...>:

> On Wed, Mar 01, 2017 at 01:04:48PM -0000, Hugh Reynolds wrote:
> > The hardware timestamp counter seems to be stuck.
> >
> > We can set it using phc_ctl, but it doesn't count.
>
> Sounds like a missing peripheral clock enable.
>
> I have never used or tested the imx6 ptp driver, and so I don't have
> any specific wisdom to offer.  In general I find the freescale^Wnxp
> kernel SW to be of dubious quality, and so my only advice is to go
> through every last register bit and make sure their code is correct.
>

I am currently working with two i.MX6 UL Eval Boards. I tried with one of
the boards as master and the other one as slave as well as my workstation
as master and the boards as slaves. It works but I didn't do any comparison
with other setups. I had more problems with the drivers for the onboard
network interface in my workstation. Now I use the Intel i210.

I can not say much about quality of the NXP/Freescale driver code though.
To date, I just skimmed some code to get a rough understanding how their
PTP support is implemented.

Best
Jan