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| -rw-r--r-- | Documentation/ABI/testing/sysfs-devices-removable | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-removable b/Documentation/ABI/testing/sysfs-devices-removable new file mode 100644 index 000000000..754ecb458 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-devices-removable @@ -0,0 +1,20 @@ +What: /sys/devices/.../removable +Date: May 2021 +Contact: Rajat Jain <rajatxjain@gmail.com> +Description: + Information about whether a given device can be removed from the + platform by the user. This is determined by its subsystem in a + bus / platform-specific way. This attribute is only present for + devices that can support determining such information: + + =========== =================================================== + "removable" device can be removed from the platform by the user + "fixed" device is fixed to the platform / cannot be removed + by the user. + "unknown" The information is unavailable / cannot be deduced. + =========== =================================================== + + Currently this is only supported by USB (which infers the + information from a combination of hub descriptor bits and + platform-specific data such as ACPI) and PCI (which gets this + from ACPI / device tree). |