lkml.org 
[lkml]   [2021]   [Nov]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 1/1] Calculate the monotonic clock from the timespec clock to generate PPS elapsed real-time event value and stores the result into /sys/class/pps/pps0/assert_elapsed.
From
Date
On 18/11/21 04:22, Alexander Komrakov wrote:
> From: alexkom <alexander.komrakov@broadcom.com>
>
> Because we have requirements to make sure the delta between standard time, say the GPS Time, and elapsedRealtime < 1 millisecond, regular linux clock timestamp is not enough for our use case.
> The pin PPS will generate elapsedRealtime event at 1 sec boundary which is an exact value of the monotonic clock from the kernel PPS driver (/sys/class/pps/pps0/assert_elapsed).
>
> Whenever AP receives this pulse, kernel's pps driver timestamp this elapsedRealtime event and let this time available via sysfs node (/sys/class/pps/pps0/assert_elapsed).
>
> Signed-off-by: alexkom <alexander.komrakov@broadcom.com>

Acked-by: Rodolfo Giometti <giometti@enneenne.com>

--
GNU/Linux Solutions e-mail: giometti@enneenne.com
Linux Device Driver giometti@linux.it
Embedded Systems phone: +39 349 2432127
UNIX programming skype: rodolfo.giometti

\
 
 \ /
  Last update: 2021-11-26 12:00    [W:0.194 / U:0.032 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site