Re: [Linuxptp-users] PTP implementation on AM335x
Hello, How can get details on this ? I will be using HW time stamping at MAC layer at CPTS core for TI Chip. and linuxptp to synchronize clock between system clock and PTP hardware clock. Master clock is GPS receiver Regards, Hardik A Gohil On Tue, Nov 22, 2016 at 4:18 PM, Richard Cochranwrote: > On Tue, Nov 22, 2016 at 02:21:07PM +0800, Hardik Gohil wrote: > > what is the accuracy of time sync ?? > > It depends. > > Cheers, > Richard > -- ___ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
Re: [Linuxptp-users] PTP implementation on AM335x
On Tue, Nov 22, 2016 at 02:21:07PM +0800, Hardik Gohil wrote: > what is the accuracy of time sync ?? It depends. Cheers, Richard -- ___ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
Re: [Linuxptp-users] PTP implementation on AM335x
Hello, Thank you. so for HW time stamping at CPTS core I need to change kernel to 3.8 or later. what is the accuracy of time sync ?? Regards, Hardik A Gohil On Tue, Nov 22, 2016 at 2:18 AM, Richard Cochranwrote: > On Mon, Nov 21, 2016 at 10:13:32PM +0800, Hardik Gohil wrote: > > Does this means support is there from kernel 3.8 > > Yes. > > > Yes I have tried this method and posted the problem in previous message. > > You said you were running kernel 3.2. That won't work. Use kernel > 3.8 or later. > > BTW, the '-T' ethtool option only works on kernel 3.5 or later. > > HTH, > Richard > > -- ___ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
Re: [Linuxptp-users] PTP implementation on AM335x
On Mon, Nov 21, 2016 at 10:13:32PM +0800, Hardik Gohil wrote: > Does this means support is there from kernel 3.8 Yes. > Yes I have tried this method and posted the problem in previous message. You said you were running kernel 3.2. That won't work. Use kernel 3.8 or later. BTW, the '-T' ethtool option only works on kernel 3.5 or later. HTH, Richard -- ___ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
[Linuxptp-users] PTP implementation on AM335x
Hello, I am working on AM335x running on linux -3.2.0 I want to implement PTP and I have done the following configuration 1. Select PPS Support - Device Drivers ---> PPS Support ---> <*> PPS Support 2. Select PTP Clock Support - Device Drivers ---> PTP Clock Support ---> <*> PTP Clock Support 3. Select TI CPTS PTP Clock - Device Drivers ---> PTP Clock Support ---> <*> TI CPTS as PTP clock As per my study AM335x supports Hardware time stamping at MAC layer. In order to confirm this I am using ethtool. root@phyCORE-AM335x:~ ./ethtool -T eth0 Time stamping parameters for eth0: Cannot get device time stamping settings: Operation not supported starting from which kernel version support is there ? how to confirm HW time stamping feature ? Regards, Hardik A Gohil -- ___ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users