adding sync method in phosphor-time-manager

[Velumani T-ERS,HCLTech]

Classification: HCL Internal

Time owner module was a different module which decides who owns the time BMC/host and set the time using NTP mode or Manual Mode.
in Time owner module ,user set the host time using the below command manually by providing  the time.
busctl set-property xyz.openbmc_project.Time.Manager \
       /xyz/openbmc_project/time/host xyz.openbmc_project.Time.EpochTime \
                   Elapsed t <value-in-microseconds>

we are now actually not repeating the time owner implementation instead we are adding one more mode(HostSync) to time manager setting.
    a.NTP
    b.Manual
    c.HostSync

    How HostSync intent to work:
                1.host sync mode will get time from the host.
                   1.1 Add an empty system service file in this repo and spawn this service when HostSync enabled
                   1.2 This service file can be override by the platform machine layer.
                   1.3 The platform machine layer install the service file and the shell script to get the time from host.
                 2.it will set the time to BMC using the shell script.
Regards,
Velu
-----Original Message-----
From: Patrick Williams <patrick at stwcx.xyz>
Sent: Wednesday, October 7, 2020 7:08 AM
To: Richard Hanley <rhanley at google.com>
Cc: Velumani T-ERS,HCLTech <velumanit at hcl.com>; openbmc at lists.ozlabs.org; Patrick Williams <patrickw3 at fb.com>
Subject: Re: adding sync method in phosphor-time-manager

On Tue, Oct 06, 2020 at 02:41:29PM -0700, Richard Hanley wrote:
> While we're on the subject, has anyone ever taken a look at using
> roughtime on a BMC? I imagine it could a really valuable extension to
> phosphor-time-manager some time in the future.
> https://blog.cloudflare.com/roughtime/

One of the problems I see is that there are a few different proposals for "next generation time" protocols beyond NTP.  Unless a project member has an explicit requirement for one of them, it doesn't seem like we should go out of our way to pick one of them.  If someone is especially interested in implementing one of them in their spare time though, they're more than welcome.

--
Patrick Williams
::DISCLAIMER::
________________________________
The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. E-mail transmission is not guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or may contain viruses in transmission. The e mail and its contents (with or without referred errors) shall therefore not attach any liability on the originator or HCL or its affiliates. Views or opinions, if any, presented in this email are solely those of the author and may not necessarily reflect the views or opinions of HCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of authorized representative of HCL is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. Before opening any email and/or attachments, please check them for viruses and other defects.
________________________________