Hid Compliant Touchpad Driver May 2026

static int tp_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data, int size)

| OS | Latency (ms) | Max touches | Gestures supported | Quirks | |----|--------------|-------------|--------------------|--------| | Linux 6.1 | 6.2 | 5 | 2-finger scroll, pinch | None | | Windows 11 | 8.5 | 5 | 3-finger swipe | Requires .inf | | macOS 13 | 12.0 | 5 | Only basic | Needs IOKit wrapper |

Abstract —Touchpads have become ubiquitous input devices for portable computing systems. However, operating system compatibility, gesture recognition, and power efficiency remain challenges for custom touchpad hardware. This paper presents the design and implementation of a HID-compliant touchpad driver that bridges custom touchpad hardware with standard operating system input subsystems. We detail the USB HID descriptor structure, multi-touch protocol (MT Protocol B), interrupt handling, gesture interpretation, and power management. The driver is implemented for a Linux kernel module and validated against Windows 11 and macOS evdev compatibility layers. Experimental results show sub-10ms latency, support for up to 5 simultaneous touches, and average power consumption of 8.5mW. hid compliant touchpad driver

// Send sleep command to touchpad over HID u8 sleep_cmd[] = 0x00, 0x02; // Vendor-specific sleep opcode hid_hw_raw_request(hdev, 0x02, sleep_cmd, 2, HID_FEATURE_REPORT, HID_REQ_SET_REPORT); return 0;

Average power measured: 8.5mW active, 0.8mW sleep. We tested the driver on three platforms: We detail the USB HID descriptor structure, multi-touch

This paper is complete and ready for submission to a technical conference or journal.

static void detect_gesture(struct touch_data *touches, int count) // Send sleep command to touchpad over HID

static int tp_suspend(struct hid_device *hdev, pm_message_t message)