On Fri, Jan 29, 2016 at 2:38 PM, Timur Tabi [off-list ref] wrote:

Rob Herring wrote:

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Isn't this a user enabled feature if the h/w supports it?

Is there a sysfs entry for that?  We were planning on having a similar
ACPI
property.

It would be in ethtool I think.

Ah, this driver does not support ethtool yet.

However, based on a cursory look of ethtool, it appears that there's only an
option to query the current timestamp, but not actually enable/disable the
feature.  The e1000e driver, for example, just forces the feature by default
for various chips.  Is there any reason why we shouldn't enable it if the
hardware supports it?

Probably not. You simply ignore the timestamp if you don't care. So
then why do you want a DT property?

Rob