Re: [PATCH 4/4] rtc: ds1307: add frequency-test property to check calibration on m41txx

[Rob Herring]

On Tue, May 8, 2018 at 9:56 AM, Giulio Benetti
<giulio.benetti@xxxxxxxxxxxxxxxx> wrote:
> On m41txx you can enable open-drain OUT pin to check if calibration is ok.
> Enabling OUT pin with frequency-test bool property, OUT pin will tick
> 512 times faster than 1s tick base.
>
> Enable FT bit on CONTROL register if calibration is active.

A DT is (or should be) a pretty static thing, so I don't think this
belongs. A kernel command line option (via module params) or a
sysfs/debugfs file would make more sense IMO.

Rob