From: robert.jarzmik@free.fr (Robert Jarzmik)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3] ARM: pxa: magician: Add support for ADS7846 touchscreen
Date: Fri, 17 Mar 2017 08:14:43 +0100 [thread overview]
Message-ID: <87wpbofk7w.fsf@belgarion.home> (raw)
In-Reply-To: <bca1b7cc-e4d6-d101-0591-61694c07bfd8@tul.cz> (Petr Cvek's message of "Mon, 13 Mar 2017 09:05:49 +0100")
Petr Cvek <petr.cvek@tul.cz> writes:
> This patch adds a support for ADS7846 touchscreen driver.
>
> The basic functionality was tested, x_plate_ohms and y_plate_ohms were
> physically measured. The value pressure_max was empirically set to match
> the measured range, which is affected by x_plate_ohms and ADS samples.
>
> The value of keep_vref_on should be set. A tested model (T-Mobile MDA
> Compact PM10A) doesn't seem to use Vref pin as the input from an external
> source. On this model the unset keep_vref_on cause high jitter of measured
> values.
>
> SPI framing pin (gpio_cs) must be used in GPIO mode due to an incompatible
> autoframing of PXA27x controller and ADS7846 device.
>
> Signed-off-by: Petr Cvek <petr.cvek@tul.cz>
Applied to pxa/for-next, unless Philipp objects in the next couple of days,
thanks.
Cheers.
--
Robert
prev parent reply other threads:[~2017-03-17 7:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-13 8:05 [PATCH v3] ARM: pxa: magician: Add support for ADS7846 touchscreen Petr Cvek
2017-03-17 7:14 ` Robert Jarzmik [this message]
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=87wpbofk7w.fsf@belgarion.home \
--to=robert.jarzmik@free.fr \
--cc=linux-arm-kernel@lists.infradead.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox