From: Arun Parameswaran <arun.parameswaran@broadcom.com>
To: Richard Cochran <richardcochran@gmail.com>
Cc: Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com
Subject: Re: [PATCH v1 1/2] dt-binding: ptp: add bindings document for dte based ptp clock
Date: Tue, 13 Jun 2017 10:46:36 -0700 [thread overview]
Message-ID: <cb008f0f-1585-653e-0b89-47478f9f4734@broadcom.com> (raw)
In-Reply-To: <20170613050947.GA1684@localhost.localdomain>
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).
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
next prev parent reply other threads:[~2017-06-13 17:46 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-12 20:25 [PATCH v1 0/2] Add support for Broadcom DTE based PTP clock Arun Parameswaran
2017-06-12 20:26 ` [PATCH v1 1/2] dt-binding: ptp: add bindings document for dte based ptp clock Arun Parameswaran
2017-06-13 5:09 ` Richard Cochran
2017-06-13 17:46 ` Arun Parameswaran [this message]
2017-06-14 18:18 ` Ray Jui
2017-06-14 18:33 ` Arun Parameswaran
2017-06-14 18:39 ` Arun Parameswaran
2017-06-18 14:04 ` Rob Herring
2017-06-19 16:50 ` Arun Parameswaran
2017-06-20 20:48 ` Scott Branden
2017-06-22 3:19 ` Rob Herring
2017-06-23 0:42 ` Scott Branden
2017-06-23 1:04 ` Florian Fainelli
2017-06-27 5:10 ` Scott Branden
2017-06-29 22:40 ` Rob Herring
2017-06-30 1:05 ` Scott Branden
2017-06-12 20:26 ` [PATCH v1 2/2] ptp: Add a ptp clock driver for Broadcom DTE Arun Parameswaran
2017-06-15 16:07 ` [PATCH v1 0/2] Add support for Broadcom DTE based PTP clock David Miller
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