From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Jacopo Mondi <jacopo@jmondi.org>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Magnus Damm <magnus.damm@gmail.com>,
Linus Walleij <linus.walleij@linaro.org>,
Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
"linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] pinctrl: sh-pfc: r8a7791: Add ADI pinconf support
Date: Tue, 29 Nov 2016 22:39:35 +0100 [thread overview]
Message-ID: <CAMuHMdUcxJ6fiahvG+Ydha_Tp5RkppSemb=1qkGRwpb4ACGoZw@mail.gmail.com> (raw)
In-Reply-To: <4558124.JutbKSQ7ug@avalon>
Hi Laurent,
On Tue, Nov 29, 2016 at 8:30 PM, Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
> On Tuesday 29 Nov 2016 10:11:56 Jacopo Mondi wrote:
>> Add pin configuration support for Gyro-ADC, named ADI on r8a7791 SoC.
>>
>> The Gyro-ADC supports three different configurations:
>> a single ADC (adi and adi_b groups), 2 ADCs selectable through a single
>> channel select signal (adi_chsel1 and adi_chsel1_b groups),
>
> I've only briefly looked up at the datasheet, but is that a supported mode ?
> It seems that mode 1 uses 4 channels and mode 2 and 3 use 8 channels.
I think you can always connect less ADCs than there are channels.
If you connect e.g. only one, you don't need any CHS signals.
If you connect e.g. two, you can use only one CHS signal.
AFAICS, you still have to use an external demux to create individual chip
selects from the single CS signal and (up to 3) CHS signals.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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
next prev parent reply other threads:[~2016-11-29 21:39 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-29 9:11 [PATCH] pinctrl: sh-pfc: r8a7791: Add ADI pinconf support Jacopo Mondi
2016-11-29 19:30 ` Laurent Pinchart
2016-11-29 21:39 ` Geert Uytterhoeven [this message]
2016-11-30 13:49 ` Geert Uytterhoeven
2016-12-01 16:40 ` jacopo
2016-12-01 8:47 ` Geert Uytterhoeven
2016-12-01 22:10 ` [PATCH v2] " Jacopo Mondi
2016-12-01 22:14 ` [PATCH v3] " Jacopo Mondi
2016-12-09 9:03 ` Geert Uytterhoeven
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CAMuHMdUcxJ6fiahvG+Ydha_Tp5RkppSemb=1qkGRwpb4ACGoZw@mail.gmail.com' \
--to=geert@linux-m68k.org \
--cc=geert+renesas@glider.be \
--cc=jacopo@jmondi.org \
--cc=laurent.pinchart@ideasonboard.com \
--cc=linus.walleij@linaro.org \
--cc=linux-gpio@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-renesas-soc@vger.kernel.org \
--cc=magnus.damm@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).