All of lore.kernel.org
 help / color / mirror / Atom feed
From: Sicelo <absicsz@gmail.com>
To: linux-iio@vger.kernel.org
Cc: maemo-leste@lists.dyne.org,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>,
	linux-input@vger.kernel.org
Subject: supporting binary (near-far) proximity sensors over gpio
Date: Fri, 17 Nov 2023 20:21:59 +0200	[thread overview]
Message-ID: <ZVevR_ajeB1jfDS9@tp440p.steeds.sam> (raw)

Hi

Some phones have 1-bit proximity sensors, which simply toggle a GPIO
line to indicate that an object is near or far. Thresholds are set at
hardware level. One such sensor is OSRAM SFH 7741 [1], which is used on
the Nokia N900.

It is currently exported over evdev, emitting the SW_FRONT_PROXIMITY key
code [2].

So the question is: should a new, general purpose iio-gpio driver be
written, that would switch such a proximity sensor to the iio framework?
Or evdev is really the best place to support it?

There are a couple of people who are willing to write such an iio
driver, if iio is the way to go.

Regards,
Sicelo

[1] https://media.digikey.com/pdf/Data%20Sheets/Osram%20PDFs/SFH_7741.pdf
[2] https://elixir.bootlin.com/linux/v6.6.1/source/arch/arm/boot/dts/ti/omap/omap3-n900.dts#L111

             reply	other threads:[~2023-11-17 18:22 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-17 18:21 Sicelo [this message]
2023-11-19  0:09 ` supporting binary (near-far) proximity sensors over gpio David Lechner
2023-11-20 17:31   ` Jonathan Cameron
2023-11-20 20:23     ` Sicelo
2023-11-26  4:33   ` Jeff LaBundy
2023-11-26 10:59     ` Philipp Jungkamp
2023-12-04 10:09       ` Jonathan Cameron

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=ZVevR_ajeB1jfDS9@tp440p.steeds.sam \
    --to=absicsz@gmail.com \
    --cc=ivo.g.dimitrov.75@gmail.com \
    --cc=linux-iio@vger.kernel.org \
    --cc=linux-input@vger.kernel.org \
    --cc=maemo-leste@lists.dyne.org \
    /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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.