Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / ABI / testing / sysfs-bus-amba

diff --git a/kernel/Documentation/ABI/testing/sysfs-bus-amba b/kernel/Documentation/ABI/testing/sysfs-bus-amba
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+What:          /sys/bus/amba/devices/.../driver_override
+Date:          September 2014
+Contact:       Antonios Motakis <a.motakis@virtualopensystems.com>
+Description:
+               This file allows the driver for a device to be specified which
+               will override standard OF, ACPI, ID table, and name matching.
+               When specified, only a driver with a name matching the value
+               written to driver_override will have an opportunity to bind to
+               the device. The override is specified by writing a string to the
+               driver_override file (echo vfio-amba > driver_override) and may
+               be cleared with an empty string (echo > driver_override).
+               This returns the device to standard matching rules binding.
+               Writing to driver_override does not automatically unbind the
+               device from its current driver or make any attempt to
+               automatically load the specified driver. If no driver with a
+               matching name is currently loaded in the kernel, the device will
+               not bind to any driver. This also allows devices to opt-out of
+               driver binding using a driver_override name such as "none".
+               Only a single driver may be specified in the override, there is
+               no support for parsing delimiters.