Re: [Linuxptp-devel] [RFC PATCH 0/3] Introduce an utility to sync pwm with PTP clock

[Lokesh Vutla via Linuxptp-devel]

On 17/05/20 2:44 AM, Richard Cochran wrote:
> On Fri, Apr 17, 2020 at 10:00:06AM +0530, Lokesh Vutla wrote:
>> Following dependencies are needed in kernel for testing:
>> - Grygorii's series to support HW_TS_PUSH[2]
>> - Add pwm node in BBB DT.
>> All dependencies are available at[3].
> 
>> [3] https://github.com/lokeshvutla/linux.git devel/bbb-pps-generation
> 
> So I tried your v2 series with this kernel, omap2_defconfig, and
> am335x-boneblack.dtb.
> 
>     ./phc2pwm -p /dev/ptp0 -l7 -c 0 -e 0 -w 0
> 
> But it simply blocks in phc_read_extts() in the call to read().
> 
> Is it supposed to work with devel/bbb-pps-generation out of the box?

Yes, the timer7 used in the above tree is connected to event index 3. So the
command should be

        ./phc2pwm -p /dev/ptp0 -l7 -c 0 -e 3 -w 0

Thanks and regards,
Lokesh



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