lkml.org 
[lkml]   [2017]   [Apr]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v5 10/10] arm: dts: genmai: Add ethernet pin group
On Thu, Apr 27, 2017 at 10:19 AM, Jacopo Mondi
<jacopo+renesas@jmondi.org> wrote:

> Add pin configuration subnode for ETHER ethernet controller.
>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
(...)
> + pins_bidir {
> + pinmux = <RZA1_PINMUX(3, 3, 2)>;/* P3_3 = ET_MDIO */
> + bi-directional;
> + };

So I'm against merging this until someone explains what "bi-directional"
actually means, electrically speaking. What happens physically on this pin?

I think this just means open drain.

It is dangerous to merge things we don't understand.

Surely someone inside Renesas can answer this question.

Yours,
Linus Walleij

\
 
 \ /
  Last update: 2017-04-28 10:55    [W:0.205 / U:0.268 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site