From: Jiada Wang <jiada_wang@mentor.com>
To: <dmitry.torokhov@gmail.com>, <robh+dt@kernel.org>,
<thierry.reding@gmail.com>, <digetx@gmail.com>,
<jonathanh@nvidia.com>
Cc: <nick@shmanahar.org>, <linux-input@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-tegra@vger.kernel.org>,
<erosca@de.adit-jv.com>, <andrew_gabbasov@mentor.com>,
<jiada_wang@mentor.com>
Subject: [PATCH v3 0/3] implement I2C retries for mXT1368
Date: Thu, 1 Oct 2020 00:12:56 +0900 [thread overview]
Message-ID: <20200930151259.18119-1-jiada_wang@mentor.com> (raw)
According to datasheet, mXT1386 chip has a WAKE line, it is used
to wake the chip up from deep sleep mode before communicating with
it via the I2C-compatible interface.
if the WAKE line is connected to a GPIO line, the line must be
asserted 25 ms before the host attempts to communicate with the
mXT1386.
If the WAKE line is connected to the SCL pin, the mXT1386 will send
a NACK on the first attempt to address it, the host must then retry
25 ms later.
This patch adds compatible string "atmel,mXT1386" for mXT1386 controller,
when I2C transfer on mXT1386 fails, retry the transfer once after a
25 ms sleep.
Jiada Wang (3):
dt-bindings: input: atmel: add compatible for mXT1386
Input: atmel_mxt_ts - implement I2C retries for mXT1368
ARM: tegra: add mXT1386 compatible
---
v3:
change compatible string to lowercase
v2:
add bool retry_i2c_transfers to struct mxt_data,
to indicate whether retry is needed when i2c transfer fails
v1: initial version
---
.../bindings/input/atmel,maxtouch.txt | 1 +
.../boot/dts/tegra20-acer-a500-picasso.dts | 2 +-
drivers/input/touchscreen/atmel_mxt_ts.c | 62 +++++++++++++++----
3 files changed, 52 insertions(+), 13 deletions(-)
--
2.17.1
next reply other threads:[~2020-09-30 15:15 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-30 15:12 Jiada Wang [this message]
2020-09-30 15:12 ` [PATCH v3 1/3] dt-bindings: input: atmel: add compatible for mXT1386 Jiada Wang
2020-09-30 15:12 ` [PATCH v3 2/3] Input: atmel_mxt_ts - implement I2C retries for mXT1368 Jiada Wang
2020-09-30 15:12 ` [PATCH v3 3/3] ARM: tegra: add mXT1386 compatible Jiada Wang
2020-10-21 1:14 ` [PATCH v3 0/3] implement I2C retries for mXT1368 Wang, Jiada
2020-10-27 21:52 ` Dmitry Osipenko
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=20200930151259.18119-1-jiada_wang@mentor.com \
--to=jiada_wang@mentor.com \
--cc=andrew_gabbasov@mentor.com \
--cc=digetx@gmail.com \
--cc=dmitry.torokhov@gmail.com \
--cc=erosca@de.adit-jv.com \
--cc=jonathanh@nvidia.com \
--cc=linux-input@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-tegra@vger.kernel.org \
--cc=nick@shmanahar.org \
--cc=robh+dt@kernel.org \
--cc=thierry.reding@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).