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From: Dmitry Osipenko <digetx@gmail.com>
To: Nick Dyer <nick@shmanahar.org>,
	Dmitry Torokhov <dmitry.torokhov@gmail.com>,
	Rob Herring <robh+dt@kernel.org>,
	Thierry Reding <thierry.reding@gmail.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	Linus Walleij <linus.walleij@linaro.org>,
	Jiada Wang <jiada_wang@mentor.com>
Cc: linux-input@vger.kernel.org, devicetree@vger.kernel.org,
	linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v4 0/3] Support wakeup methods of Atmel maXTouch controllers
Date: Fri, 22 Jan 2021 23:06:56 +0300	[thread overview]
Message-ID: <20210122200659.7404-1-digetx@gmail.com> (raw)

Some Atmel maXTouch controllers, like mXT1386 and mXT3432S1 for example,
have a WAKE line that needs to be asserted in order to wake controller
from a deep sleep, otherwise it will be unusable. This series implements
support for the wakeup methods in accordance to the mXT1386 datasheet [1],
see page 29 (chapter "5.8 WAKE Line").

The mXT1386 is a widely used controller found on many older Android tablet
devices. Touchscreen on Acer A500 tablet now works properly after this
series.

This patchset is a continuation of the work originally started by
Jiada Wang [2].

[1] https://ww1.microchip.com/downloads/en/DeviceDoc/mXT1386_1vx_Datasheet_LX.pdf
[2] https://patchwork.kernel.org/project/linux-input/list/?series=357875

Changelog:

v4: - Improved commit message of the DT binding patch. No code changes.

v3: - Added "default: 0" to the atmel,wakeup-method property in the binding.

    - Added r-b from Linus Walleij to the binding patch.

    - The wake-GPIO is now toggled on touchscreen's start/stop in order to
      allow it to sleep during suspend. Suggested by Linus Walleij.

v2: - Fixed copy-paste bug in the code.

Dmitry Osipenko (3):
  dt-bindings: input: atmel_mxt_ts: Document atmel,wakeup-method and
    WAKE line GPIO
  Input: atmel_mxt_ts - support wakeup methods
  ARM: tegra: acer-a500: Add atmel,wakeup-method property

 .../bindings/input/atmel,maxtouch.yaml        | 29 +++++++
 .../boot/dts/tegra20-acer-a500-picasso.dts    |  3 +
 drivers/input/touchscreen/atmel_mxt_ts.c      | 78 +++++++++++++++++++
 include/dt-bindings/input/atmel-maxtouch.h    | 10 +++
 4 files changed, 120 insertions(+)
 create mode 100644 include/dt-bindings/input/atmel-maxtouch.h

-- 
2.29.2


             reply	other threads:[~2021-01-22 22:00 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-22 20:06 Dmitry Osipenko [this message]
2021-01-22 20:06 ` [PATCH v4 1/3] dt-bindings: input: atmel_mxt_ts: Document atmel,wakeup-method and WAKE line GPIO Dmitry Osipenko
2021-02-05 23:16   ` Rob Herring
2021-01-22 20:06 ` [PATCH v4 2/3] Input: atmel_mxt_ts - support wakeup methods Dmitry Osipenko
2021-01-23 22:59   ` Linus Walleij
2021-01-22 20:06 ` [PATCH v4 3/3] ARM: tegra: acer-a500: Add atmel,wakeup-method property Dmitry Osipenko

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