linux-kernel - RE: [PATCH] ARM: dts: r8a7742-iwg21d-q7-dbcm-ca: Add device tree for camera DB

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Date:   Sun, 7 Jun 2020 17:48:50 +0000
From:   Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        "Lad, Prabhakar" <prabhakar.csengg@...il.com>
CC:     Rob Herring <robh+dt@...nel.org>,
        Magnus Damm <magnus.damm@...il.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>
Subject: RE: [PATCH] ARM: dts: r8a7742-iwg21d-q7-dbcm-ca: Add device tree for
 camera DB

Hi Geert,

> -----Original Message-----
> From: Geert Uytterhoeven <geert@...ux-m68k.org>
> Sent: 07 June 2020 18:42
> To: Lad, Prabhakar <prabhakar.csengg@...il.com>
> Cc: Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>; Rob Herring <robh+dt@...nel.org>; Magnus Damm
> <magnus.damm@...il.com>; open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS <devicetree@...r.kernel.org>; Linux
> Kernel Mailing List <linux-kernel@...r.kernel.org>; Linux-Renesas <linux-renesas-soc@...r.kernel.org>
> Subject: Re: [PATCH] ARM: dts: r8a7742-iwg21d-q7-dbcm-ca: Add device tree for camera DB
>
> Hi Prabhakar,
>
> On Sun, Jun 7, 2020 at 6:19 PM Lad, Prabhakar
> <prabhakar.csengg@...il.com> wrote:
> > On Fri, Jun 5, 2020 at 1:27 PM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> > > On Wed, May 27, 2020 at 3:29 PM Lad Prabhakar
> > > <prabhakar.mahadev-lad.rj@...renesas.com> wrote:
> > > > Add support for the camera daughter board which is connected to
> > > > iWave's RZ/G1H Qseven carrier board. Also enable ttySC[0135] and
> > > > ethernet1 interfaces.
> > > >
> > > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > > > Reviewed-by: Marian-Cristian Rotariu <marian-cristian.rotariu.rb@...renesas.com>
> > >
> > > Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
> > >
> > > > --- /dev/null
> > > > +++ b/arch/arm/boot/dts/r8a7742-iwg21d-q7-dbcm-ca.dts
> > >
> > > > +&scifb1 {
> > > > +       pinctrl-0 = <&scifb1_pins>;
> > > > +       pinctrl-names = "default";
> > > > +       status = "okay";
> > >
> > > Before I queue this in renesas-devel for v5.9, I have on question:
> > > As this port carries RTS/CTS signals, perhaps you want to add
> > >
> > >     rts-gpios = <&gpio4 21 GPIO_ACTIVE_LOW>;
> > >     cts-gpios = <&gpio4 17 GPIO_ACTIVE_LOW>;
> > >
> > Aaha the user manual mentioned RTS/CTS wasn't connected, but I tested
> > this with the above which disproves the Doc. Shall I post it as a
>
> RTS/CTS are indeed not connected to the dedicated RTS/CTS pins of
> SCIFB1, so the documentation is right.
> However, the pins on the serial port connector can be used as GPIOs,
> hence they can be used with software-controlled RTS/CTS.
>
> > separate patch or post a v2 including it.
>
> Up to you, I can handle both.
>
I shall post a v2.

Cheers,
--Prabhakar

> 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


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