[PATCH v2 0/8] platform/x86: Huawei WMI laptop extras driver

[Ayman Bagabas]

Changes from v1:
* introducing debugfs
* code reformatting

This patch series introduce new features to the driver and also moves the
driver from wmi_driver to platform_driver. This move is necessary because the
driver is no longer only a hotkeys driver and platform_driver offers easier
future extensibility.

The patch series introduces a WMI BIOS interface that brings on new features
and enables controlling micmute LED through this interface on supported models.
It also enables controlling battery charging thresholds and fn-lock state.
These features are controlled through the HWMI WMI device present in most of
these laptops.

Currently, micmute LED is controlled through an ACPI method under EC.
This method ("SPIN", "WPIN") is specific to some models and wouldn't
work on all Huawei laptops. Controlling this LED through the interface provides
a better unified method to control the LED on models that implements this
feature.

The behavior of hotkeys is not the same among all models. Some models
require fn-lock to do things like `Ctrl-Ins` or `Alt-PrtSc`. Fn-lock inverts the
behavior of the top row from special keys to F1-F12 keys.

A debugfs interface is also implemented to support unrepresented features and to
provide debugging feedback from users.

Ayman Bagabas (8):
  platform/x86: huawei-wmi: move to platform driver
  platform/x86: huawei-wmi: implement WMI management interface
  platform/x86: huawei-wmi: use quirks and module parameters
  platform/x86: huawei-wmi: control micmute LED through WMI interface
  platform/x86: huawei-wmi: add battery charging protection support
  platform/x86: huawei-wmi: add fn-lock support
  platform/x86: huawei-wmi: add sysfs interface support
  platform/x86: huawei-wmi: add debugfs files support

 drivers/platform/x86/huawei-wmi.c | 754 ++++++++++++++++++++++++++----
 1 file changed, 665 insertions(+), 89 deletions(-)

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2.20.1