On 17-06-14 11:18 AM, Ray Jui wrote:

On 6/13/17 10:46 AM, Arun Parameswaran wrote:

quoted

Hi Richard,

On 17-06-12 10:09 PM, Richard Cochran wrote:

quoted

On Mon, Jun 12, 2017 at 01:26:00PM -0700, Arun Parameswaran wrote:

quoted

+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.

quoted

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.

quoted

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