---
name: "mx25l"
section: "4"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["freebsd"]
url: "https://new.carta.tech/mx25l"
---

# mx25l(4)

SpiFlash compatible non-volatile storage devices driver

## NAME

**mx25l** – SpiFlash compatible non-volatile storage devices driver

## SYNOPSIS

**device** **mx25l**

In [loader.conf(5)](/loader.conf/5.md): **mx25l\_load="YES"**

## DESCRIPTION

The **mx25l** driver provides support for the family of non-volatile storage devices known collectively as SpiFlash(tm). SpiFlash chips typically have part numbers beginning with EN25, IS25, MX25, S25, SST25, or W25.

The **mx25l** driver uses opcode 0x9f to read the manufacturer and device ID data to determine whether the device is supported. The device ID is looked up using a table of data within the driver which describes the attributes of each supported device, such as block size, sector size, and device capacity. When a supported device is found, the **mx25l** driver creates a disk device and makes it accessible at */dev/flash/spi?*. The new disk device is then tasted by the available [geom(4)](/geom/4.md) modules as with any disk device.

## HARDWARE

The **mx25l** driver supports the following spi flash memory devices:

- AT25DF641

- EN25F32

- EN25P32

- EN25P64

- EN25Q32

- EN25Q64

- GD25Q64

- M25P32

- M25P64

- MX25L1606E

- MX25LL128

- MX25LL256

- MX25LL32

- MX25LL64

- N25Q64

- S25FL032

- S25FL064

- S25FL128

- S25FL256S

- SST25VF010A

- SST25VF032B

- W25Q128

- W25Q256

- W25Q32

- W25Q64

- W25Q64BV

- W25X32

- W25X64

## FDT CONFIGURATION

On an [fdt(4)](/fdt/4.md) based system, the **mx25l** device is defined as a slave device subnode of the SPI bus controller node. All properties documented in the *spibus.txt* bindings document can be used with the **mx25l** device. The most commonly-used ones are documented below.

The following properties are required in the **mx25l** device subnode:

- *compatible*

  Must be the string "jedec,spi-nor".

- *reg*

  Chip select address of device.

- *spi-max-frequency*

  The maximum bus frequency to use when communicating with this slave device. Actual bus speed may be lower, depending on the capabilities of the SPI bus controller hardware.

The following properties are optional for the **mx25l** device subnode:

- *spi-cpha*

  Empty property indicating the slave device requires shifted clock phase (CPHA) mode.

- *spi-cpol*

  Empty property indicating the slave device requires inverse clock polarity (CPOL) mode.

- *spi-cs-high*

  Empty property indicating the slave device requires chip select active high.

## HINTS CONFIGURATION

On a [device.hints(5)](/device.hints/5.md) based system, such as MIPS, these values are configurable for **mx25l**:

- *hint.mx25l.%d.at*

  The spibus the **mx25l** instance is attached to.

- *hint.mx25l.%d.clock*

  The maximum bus frequency to use when communicating with this device. Actual bus speed may be lower, depending on the capabilities of the SPI bus controller hardware.

- *hint.mx25l.%d.cs*

  The chip-select number to assert when performing I/O for this device. Set the high bit (1 \<\< 31) to invert the logic level of the chip select line.

- *hint.mx25l.%d.mode*

  The SPI mode (0-3) to use when communicating with this device.

## FILES

- */dev/flash/spi?*

  Provides read/write access to the storage device.

## SEE ALSO

[fdt(4)](/fdt/4.md), [geom(4)](/geom/4.md)

## HISTORY

The **mx25l** driver first appeared in FreeBSD 8.0.