linux-kernel - [PATCH v3 0/2] Support for buttons on newer MS Surface devices

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Date:   Sat, 20 Jul 2019 17:05:09 +0200
From:   Maximilian Luz <luzmaximilian@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
        platform-driver-x86@...r.kernel.org,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Chen Yu <yu.c.chen@...el.com>,
        Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Maximilian Luz <luzmaximilian@...il.com>
Subject: [PATCH v3 0/2] Support for buttons on newer MS Surface devices

This series adds support for power and volume buttons on 5th and 6th
generation Microsoft Surface devices. Specifically, it adds support for
the power-button on the Surface Laptop 1 and Laptop 2, as well as
support for power- and (on-device) volume-buttons on the Surface Pro 5
(2017), Pro 6, and Book 2.

These devices use the same MSHW0040 device as on the Surface Pro 4,
however, whereas the Pro 4 uses an ACPI notify handler, the newer
devices use GPIO interrupts to signal these events.

The first patch of this series ensures that the surfacepro3_button
driver, used for MSHW0040 on the Pro 4, does not probe for the newer
devices. The second patch adapts soc_button_array to implement the
actual button support.

Changes in v3:
  - [PATCH 1/2] platform/x86: surfacepro3_button: Fix device check
    - Changed subject line to fit conventions.
    - Added comments to clarify ACPI/DSM specific behavior.
    - Change return type of introduced device check function to bool.

  - [PATCH 1/2] Input: soc_button_array - Add support for newer
      surface devices
    - Changed subject line to fit conventions.
    - Explicitly require CONFIG_ACPI via Kconfig instead of guarding
      with #ifdef CONFIG_ACPI in code.
    - Add supported Surface devices to module description in Kconfig.
    - Allow -EPROBE_DEFER and other errors to be propagated from
      gpiod_get.
    - Fix deferral process in case GPIO subsystem is not initialized.

Changes in v2:
  - [PATCH 1/2] platform: Fix device check for surfacepro3_button
    No changes.

  - [PATCH 2/2] input: soc_button_array for newer surface devices
    Ensure the patch compiles without CONFIG_ACPI.

Maximilian Luz (2):
  platform/x86: surfacepro3_button: Fix device check
  Input: soc_button_array - Add support for newer surface devices

 drivers/input/misc/Kconfig                |   6 +-
 drivers/input/misc/soc_button_array.c     | 141 ++++++++++++++++++++--
 drivers/platform/x86/surfacepro3_button.c |  47 ++++++++
 3 files changed, 178 insertions(+), 16 deletions(-)

-- 
2.22.0