From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ray Jui Subject: Re: [PATCH v1 1/2] dt-binding: ptp: add bindings document for dte based ptp clock Date: Wed, 14 Jun 2017 11:18:54 -0700 Message-ID: References: <1497299161-6458-1-git-send-email-arun.parameswaran@broadcom.com> <1497299161-6458-2-git-send-email-arun.parameswaran@broadcom.com> <20170613050947.GA1684@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Cc: Rob Herring , Mark Rutland , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, bcm-kernel-feedback-list-dY08KVG/lbpWk0Htik3J/w@public.gmane.org To: Arun Parameswaran , Richard Cochran Return-path: In-Reply-To: Content-Language: en-US Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: netdev.vger.kernel.org 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? > 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 > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html