linux-kernel - [PATCH v3 0/2] platform/x86: alienware-wmi-wmax: Add support for GPIO methods

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Message-Id: <20250502-awcc-gpio-v3-0-ea9a932d1124@gmail.com>
Date: Fri, 02 May 2025 05:08:59 -0300
From: Kurt Borja via B4 Relay <devnull+kuurtb.gmail.com@...nel.org>
To: Hans de Goede <hdegoede@...hat.com>, 
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>, 
 Armin Wolf <W_Armin@....de>
Cc: Gabriel Marcano <gabemarcano@...oo.com>, 
 platform-driver-x86@...r.kernel.org, Dell.Client.Kernel@...l.com, 
 linux-kernel@...r.kernel.org, Kurt Borja <kuurtb@...il.com>
Subject: [PATCH v3 0/2] platform/x86: alienware-wmi-wmax: Add support for
 GPIO methods

Hi all,

I found a great blog post [1], which described the reverse engineering
process of the GPIO control methods present on this device.

In summary, these methods expose some debugging capabilities of the RGB
lighting controller present on Dell gaming laptops. See [Patch 2] for
more info.

Exposing these methods to DebugFS is useful for developers exploring
this RGB controllers (myself included).

Thanks for your feedback!

[1] https://gabriel.marcanobrady.family/blog/2024/12/16/dell-g5-5505-se-acpi-or-figuring-out-how-to-reset-the-rgb-controller/

Signed-off-by: Kurt Borja <kuurtb@...il.com>
---
Changes in v3:
- Create pinX files dynamically, based on GPIO pin count
- Added note on dummy input arguments in Documentation
- Link to v2: https://lore.kernel.org/r/20250427-awcc-gpio-v2-0-c731373b5d02@gmail.com

Changes in v2:
- Dropped module parameter
- Added ABI documentation to Patch 1
- Small improvements to documentation based on Armin's comments
- Improved Pin description table format
- Link to v1: https://lore.kernel.org/r/20250423-awcc-gpio-v1-0-160a11bc3f9a@gmail.com

---
Kurt Borja (2):
      platform/x86: alienware-wmi-wmax: Expose GPIO debug methods
      Documentation: wmi: alienware-wmi: Add GPIO control documentation

 Documentation/ABI/testing/debugfs-alienware-wmi |  20 +++++
 Documentation/wmi/devices/alienware-wmi.rst     |  82 +++++++++++++++++-
 drivers/platform/x86/dell/alienware-wmi-wmax.c  | 105 +++++++++++++++++++++++-
 3 files changed, 201 insertions(+), 6 deletions(-)
---
base-commit: f618f1b298d3195d363b20f158ccb3facf553f0d
change-id: 20250413-awcc-gpio-24b1f5c546d2

Best regards,
-- 
 ~ Kurt