Hi,
On Fri, May 20, 2022 at 2:01 PM Stephen Boyd <swboyd@xxxxxxxxxxxx> wrote:
>
> Quoting Doug Anderson (2022-05-20 13:39:21)
> > On Fri, May 20, 2022 at 1:38 PM Stephen Boyd <swboyd@xxxxxxxxxxxx> wrote:
> > >
> > > Quoting Judy Hsiao (2022-05-20 09:10:02)
> > > > +};
> > > > +
> > > > +&mi2s1_sclk {
> > > > + drive-strength = <6>;
> > > > + bias-disable;
> > >
> > > Is there an external pull on this line? If so please add that details as
> > > a comment like we do for other external pulls.
> >
> > Actually, I think they are output lines, which is why they have a
> > drive-strength. I think for output lines we don't usually comment
> > about why we're disabling the pulls, only for input lines?
>
> Ok makes sense. Even for an open drain signal it would be an "input" so
> that rule still applies?
I think open drain is mostly used for bidirectional signals, like i2c
lines. In that case then you're right, you can have a drive-strength
and a pull. ...I thought i2s was not bidirectoinal and not open-drain,
but I certainly could be wrong.
-Doug
