The lessons learned from debugging the 80860F14 controller—particularly regarding power management, GPIO-based card detection, and ACPI region handlers—helped standardize support for subsequent Intel SoCs in the Linux kernel. This historical context is important for developers maintaining legacy hardware or working with modern embedded Intel systems that still rely on similar ACPI enumeration methods for their storage controllers.
MicroSD Slot Not Recognized on Intel Compute Stick ... - GitHub
: Often, "Optional Updates" in the Windows Update menu will contain the necessary Intel driver.
On these platforms, the 80860F14 ID often appears multiple times, each representing a different function. This is why you may see messages like [80860F14:00] , [80860F14:01] , or [80860F14:02] in system logs. The driver maps these unique IDs, or _UID (Unique IDs), to specific roles:
A major issue soon surfaced: on some devices, the physical SD card slot simply wouldn't work. This was fixed by a patch titled mmc: sdhci-acpi: Fix broken card detect for ACPI HID 80860F14 . The root cause was that "some 80860F14 devices do not support card detect and must rely completely on GPIO" (General Purpose Input/Output pins on the SoC). This fix forced the kernel to use the GPIO signal for card detection instead of the controller's broken native method, making the SD card slots work reliably. Acpi 80860f14
platform (Atoms, Celerons, and Pentiums from the 2013-2015 era). The "ACPI" prefix indicates that the device is being enumerated via the Advanced Configuration and Power Interface
On mainline kernels 5.10+, this ID should be automatically handled by dw_i2c via the baytrail_sem_platform quirk. If you still see errors, check your DSDT for custom modifications or consider updating your firmware.
: The specific product model identifier assigned to the Intel SD Host Controller / SDIO Controller .
The ACPI 80860F14 has been associated with various meanings and implications, including: - GitHub : Often, "Optional Updates" in the
Add intel_idle.max_cstate=1 to grub. This prevents the P-unit from entering deep C-states that break the I2C semaphore.
The hardware string ACPI\80860F14 breaks down into a few distinct variables using standard hardware identification structures:
Because this device is part of a "System on a Chip" (SoC) architecture, you rarely find a standalone driver for just the SD controller. Instead, you need the (often called the SoC Center or Intel Chipset Device Software ). 2. Manufacturer-Specific Drivers
Name (_HID, "80860F14") Name (_CID, "PNP0D10") // Generic I2C controller Name (_CRS, ResourceTemplate() Memory32Fixed (ReadWrite, 0xFF12A000, 0x1000) Interrupt (ResourceConsumer, Level, ActiveHigh, Shared) 0x3E ) Name (_DSD, Package() ... ) // Device-specific properties The driver maps these unique IDs, or _UID
The 80860F14 controller acts as an interface between the CPU and Secure Digital (SD) or MultiMediaCard (MMC) storage. In many Bay Trail systems, this single controller handles multiple functions:
Disclaimer: Proceed with caution when updating BIOS or forcing drivers, as this can affect system stability.
If your Windows Device Manager displays a yellow exclamation mark next to "Unknown Device" with this specific hardware ID, it means your operating system cannot read your internal hard drive or SD card slot due to a missing controller driver.
