linux-kernel - RE: [EXT] Re: [PATCH] devicetree: property-units: Add kohms unit

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Date:   Tue, 17 Sep 2019 08:25:55 +0000
From:   Biwen Li <biwen.li@....com>
To:     'Geert Uytterhoeven' <geert@...ux-m68k.org>
CC:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Sam Ravnborg <sam@...nborg.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: RE: [EXT] Re: [PATCH] devicetree: property-units: Add kohms unit

> 
> Caution: EXT Email
> 
> Hi Biwen,
> 
> On Tue, Sep 17, 2019 at 10:09 AM Biwen Li <biwen.li@....com> wrote:
> > The patch adds kohms unit
> >
> > Signed-off-by: Biwen Li <biwen.li@....com>
> 
> Thanks for your patch!
> 
> > --- a/Documentation/devicetree/bindings/property-units.txt
> > +++ b/Documentation/devicetree/bindings/property-units.txt
> > @@ -27,6 +27,7 @@ Electricity
> >  -microamp      : microampere
> >  -microamp-hours : microampere hour
> >  -ohms          : ohm
> > +-kohms         : kiloohm
> >  -micro-ohms    : microohm
> >  -microwatt-hours: microwatt hour
> >  -microvolt     : microvolt
> 
> What's your rationale for adding "kohms"?
> Do you need to specify resistance values that do not fit in 32-bit, and thus
32-bit is enough, I have three values, 60 kohm, 100 kohm and 500 kohm
> cannot be specified using "ohms"?
If replace with ohms, the value is as follows:
60000 ohm, 100000 ohm, 500000 ohm.
It's so long for everyone.

> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 --
> geert@...ux-m68k.org
> 
> In personal conversations with technical people, I call myself a hacker. But when
> I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds