#1143921 intel-lpss: probe of INT3446:00 fails with -16 on Dell Latitude 7480

Package:
src:linux
Source:
src:linux
Submitter:
Victor A. Bettachini
Date:
2026-08-08 15:05:02 UTC
Severity:
normal
#1143921#5
Date:
2026-08-08 15:03:52 UTC
From:
To:
Dear Maintainer,

On a Dell Latitude 7480, the intel-lpss driver fails to probe the INT3446:00
device with error -16 (EBUSY). This prevents the GPIO controller from being
registered.

**Steps to Reproduce:**
1. Boot Debian with kernel 6.12.101+deb13-amd64 on a Dell Latitude 7480.
2. Check dmesg for the INT3446:00 probe failure.

**Expected Result:**
The device should probe successfully and bind to the intel-lpss driver.

**Actual Result:**
[    1.838191] intel-lpss INT3446:00: probe with driver intel-lpss failed with error -16

**Hardware Information:**
System Manufacturer: Dell Inc.
System Product Name: Latitude 7480

**Device Information:**
Modalias: acpi:INT3446:
Status: 15 (present and operational)

**Additional Context:**
This is a known resource conflict where the ACPI GEXP device and the I2C4
controller (INT3446) both claim the same MMIO region. A similar issue on the
Dell Latitude 5285 was recently fixed by adding a DMI quirk to the intel-lpss
driver:

https://lkml.iu.edu/hypermail/linux/kernel/2604.2/02758.html

Extending this quirk to also cover the Dell Latitude 7480 would likely resolve
the issue.

This is reproducible on every boot.