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[221.49.92.147]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29bceb40276sm56054805ad.73.2025.11.28.16.31.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Nov 2025 16:31:13 -0800 (PST) From: Vishnu Sankar To: corbet@lwn.net, dmitry.torokhov@gmail.com, hmh@hmh.eng.br, derekjohn.clark@gmail.com, hansg@kernel.org, ilpo.jarvinen@linux.intel.com Cc: mpearson-lenovo@squebb.ca, linux-doc@vger.kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, ibm-acpi-devel@lists.sourceforge.net, platform-driver-x86@vger.kernel.org, vsankar@lenovo.com, Vishnu Sankar Subject: [PATCH v4 0/3] TrackPoint doubletap enablement and user control Date: Sat, 29 Nov 2025 09:25:30 +0900 Message-ID: <20251129002533.9070-1-vishnuocv@gmail.com> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This patch series adds doubletap support for TrackPoint devices with a clean separation of concerns: 1. Firmware enablement (trackpoint.c): Automatically enables doubletap on capable hardware during device detection 2. User control (thinkpad_acpi.c): Provides sysfs interface for controlling event filtering The simplified approach follows KISS principle: - Trackpoint driver enables hardware functionality by default - Thinkpad_acpi driver provides user control via existing filtering - No cross-driver dependencies or complex interactions Changes in v4: - Complete redesign based on reviewer feedback - trackpoint.c: Simplified to only enable doubletap by default - trackpoint.c: Removed all sysfs attributes and global variables - trackpoint.c: Uses firmware ID detection with deny list - thinkpad_acpi.c: Added simple sysfs interface for event filtering - thinkpad_acpi.c: Uses clear naming (doubletap_filter) - thinkpad_acpi.c: No cross-driver dependencies - Documentation: Updated to reflect simplified sysfs approach Changes in v3: - No changes Changes in v2: - Improved commit messages - Removed unnecessary comments and debug messages - Using strstarts() instead of strcmp() - Modified is_trackpoint_dt_capable() - Removed _BIT suffix and used BIT() define This version addresses the core reviewer feedback by: - Removing dual filtering complexity - Following KISS principle with clear separation - Providing immediate functionality without configuration Vishnu Sankar (3): input: trackpoint - Enable doubletap by default on capable devices platform/x86: thinkpad_acpi - Add doubletap_filter sysfs interface Documentation: thinkpad-acpi - Document doubletap_filter attribute .../admin-guide/laptops/thinkpad-acpi.rst | 20 +++++++ drivers/input/mouse/trackpoint.c | 51 ++++++++++++++++++ drivers/input/mouse/trackpoint.h | 5 ++ drivers/platform/x86/lenovo/thinkpad_acpi.c | 54 +++++++++++++++++-- 4 files changed, 125 insertions(+), 5 deletions(-) -- 2.51.0