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 >> -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html