linux-kernel - [PATCH 0/2] platform/x86: lenovo-wmi-capdata: Add debugfs file for dumping capdata

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Message-ID: <20260210191938.137234-1-i@rong.moe>
Date: Wed, 11 Feb 2026 03:19:35 +0800
From: Rong Zhang <i@...g.moe>
To: Mark Pearson <mpearson-lenovo@...ebb.ca>,
	"Derek J. Clark" <derekjohn.clark@...il.com>,
	Armin Wolf <W_Armin@....de>,
	Hans de Goede <hansg@...nel.org>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: Rong Zhang <i@...g.moe>,
	Kurt Borja <kuurtb@...il.com>,
	platform-driver-x86@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/2] platform/x86: lenovo-wmi-capdata: Add debugfs file for dumping capdata

The Lenovo GameZone/Other interfaces have some delicate divergences
among different devices. When making a bug report or adding support for
new devices/interfaces, capdata is the most important information to
cross-check with.

Add a debugfs file (lenovo_wmi/<device_name>/capdata), so that users can
dump capdata and include it in their reports.

The output is like:

  LENOVO_CAPABILITY_DATA_00[0]:
    id:             0x00010000 [dev:  0, feat:  1, mode:  0, type:  0]
    supported:      0x00000007 [ RWV]
    default_value:  0

  LENOVO_CAPABILITY_DATA_01[0]:
    id:             0x00000000 [dev:  0, feat:  0, mode:  0, type:  0]
    supported:      0x00000000 [    ]
    default_value:  0
    step:           0
    min_value:      0
    max_value:      0

  LENOVO_FAN_TEST_DATA[0]:
    id:             1
    min_rpm:        2200
    max_rpm:        5000

A helper function for creating per-devcie debugfs directories is also
introduced into lenovo-wmi-helpers in order that we can maintain a tidy
directory structure in debugfs.

The series is based on platform-drivers-x86/review-ilpo-next since it
depends on a commit there. I am OK to wait until the next cycle.

Rong Zhang (2):
  platform/x86: lenovo-wmi-helpers: Add helper for creating per-device
    debugfs dir
  platform/x86: lenovo-wmi-capdata: Add debugfs file for dumping capdata

 drivers/platform/x86/lenovo/Kconfig       |   1 +
 drivers/platform/x86/lenovo/wmi-capdata.c | 121 ++++++++++++++++++++++
 drivers/platform/x86/lenovo/wmi-capdata.h |   4 +-
 drivers/platform/x86/lenovo/wmi-helpers.c |  34 ++++++
 drivers/platform/x86/lenovo/wmi-helpers.h |   2 +
 5 files changed, 159 insertions(+), 3 deletions(-)


base-commit: 5a5203a45b063a594e89a2aeaf9e4923893a5b4c
-- 
2.51.0