From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arun Parameswaran 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 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: Richard Cochran Return-path: In-Reply-To: <20170613050947.GA1684-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org> Content-Language: en-US Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: netdev.vger.kernel.org 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 -- 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