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| author | Gary E. Miller <gem@rellim.com> | 2015-02-21 22:19:36 -0800 |
|---|---|---|
| committer | Gary E. Miller <gem@rellim.com> | 2015-02-21 22:19:36 -0800 |
| commit | ffa2c4b4a8b09c892eb68beb69c0af2657fe3177 (patch) | |
| tree | 22f1282e7c99d60141fc8f9d3172886fb36effbb /www/gpsd-time-service-howto.txt | |
| parent | 510ae13c69d8d3d0c54a211293dde03f74df0e7d (diff) | |
| download | gpsd-ffa2c4b4a8b09c892eb68beb69c0af2657fe3177.tar.gz | |
Add kernel config to PTP howto
Diffstat (limited to 'www/gpsd-time-service-howto.txt')
| -rw-r--r-- | www/gpsd-time-service-howto.txt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/www/gpsd-time-service-howto.txt b/www/gpsd-time-service-howto.txt index fdeca95d..c4aebbfe 100644 --- a/www/gpsd-time-service-howto.txt +++ b/www/gpsd-time-service-howto.txt @@ -1282,6 +1282,15 @@ instructions on their web page to download, compile and install on your NTP chimer and its slaves. Be sure to also follow their instructions on how to configure your linux kernel. +If you are scratch-building a Linux kernel, the configuration +must include either these two lines, or the same with "y" replaced +by "m" to enable the drivers as modules: + +----------------------------------------------------------------------------- +CONFIG_NETWORK_PHY_TIMESTAMPING=y +PTP_1588_CLOCK=y +----------------------------------------------------------------------------- + In our setup we will just use the ptp4l program. This program does special low level timing on ethernet frames and shares that information with chronyd or ntpd using an SHM. Since gpsd also uses SHM be very careful |