Re: [PATCH v1 1/2] dt-binding: ptp: add bindings document for dte based ptp clock

From	Arun Parameswaran <arun.parameswaran@broadcom.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v1 1/2] dt-binding: ptp: add bindings document for dte based ptp clock
Date	2017-06-14 20:40 +0200
Message-ID	<tSlmV-fF-9@gated-at.bofh.it> (permalink)
References	<tRE8h-6Wq-7@gated-at.bofh.it> <tRE8i-6Wq-13@gated-at.bofh.it> <tRMpb-3Pk-17@gated-at.bofh.it> <tRY70-2tP-21@gated-at.bofh.it> <tSl3z-9p-15@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 17-06-14 11:18 AM, Ray Jui wrote:
> 
> 
> On 6/13/17 10:46 AM, Arun Parameswaran wrote:
>>
>> Hi Richard,
>>
>> On 17-06-12 10:09 PM, Richard Cochran wrote:
>>> On Mon, Jun 12, 2017 at 01:26:00PM -0700, Arun Parameswaran wrote:
>>>> +Example:
>>>> +
>>>> +ptp_dte: ptp_dte@180af650 {
>>>> +	compatible = "brcm,ptp-dte";
>>>> +	reg = <0x180af650 0x10>;
>>>> +	status = "okay";
>>>> +};
>>> This patch set looks okay, as far as it goes, but how does one
>>> actually use the clock?
>>>
>>> How does one connect this node to an Ethernet MAC, for example?
>> In some of the SoC's, the DTE's NCO is synced in hardware with the Ethernet's
>> 1588 Shim NCO (used for time-stamping the packets). We are working on getting
>> all the future SoC's synced this way (for Ethernet).
>>
> 
> So apparently you do not need any phandle based DT binding defined for
> the connection between the Ethernet device node and the PTP device node?
> 
Correct. This driver doesn't need any phandle.

The Ethernet/Switch driver, in the SoC's where the hardware link is not
available, might need the phandle to this driver.

>> In other scenarios, we use an user-space app to perform the sync based on
>> time-stamps from external hardware sources like the Wi-Fi.
>>> Thanks,
>>> Richard
>>

Thread

[PATCH v1 0/2] Add support for Broadcom DTE based PTP clock Arun Parameswaran <arun.parameswaran@broadcom.com> - 2017-06-12 22:30 +0200
  [PATCH v1 1/2] dt-binding: ptp: add bindings document for dte based ptp clock Arun Parameswaran <arun.parameswaran@broadcom.com> - 2017-06-12 22:30 +0200
    Re: [PATCH v1 1/2] dt-binding: ptp: add bindings document for dte  based ptp clock Richard Cochran <richardcochran@gmail.com> - 2017-06-13 07:20 +0200
      Re: [PATCH v1 1/2] dt-binding: ptp: add bindings document for dte  based ptp clock Arun Parameswaran <arun.parameswaran@broadcom.com> - 2017-06-13 19:50 +0200
        Re: [PATCH v1 1/2] dt-binding: ptp: add bindings document for dte  based ptp clock Ray Jui <ray.jui@broadcom.com> - 2017-06-14 20:20 +0200
          Re: [PATCH v1 1/2] dt-binding: ptp: add bindings document for dte  based ptp clock Arun Parameswaran <arun.parameswaran@broadcom.com> - 2017-06-14 20:40 +0200
          Re: [PATCH v1 1/2] dt-binding: ptp: add bindings document for dte  based ptp clock Arun Parameswaran <arun.parameswaran@broadcom.com> - 2017-06-14 20:40 +0200
    Re: [PATCH v1 1/2] dt-binding: ptp: add bindings document for dte  based ptp clock Rob Herring <robh@kernel.org> - 2017-06-18 16:10 +0200
      Re: [PATCH v1 1/2] dt-binding: ptp: add bindings document for dte  based ptp clock Arun Parameswaran <arun.parameswaran@broadcom.com> - 2017-06-19 19:00 +0200
  [PATCH v1 2/2] ptp: Add a ptp clock driver for Broadcom DTE Arun Parameswaran <arun.parameswaran@broadcom.com> - 2017-06-12 22:30 +0200
  Re: [PATCH v1 0/2] Add support for Broadcom DTE based PTP clock David Miller <davem@davemloft.net> - 2017-06-15 18:10 +0200

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