Add the rt linux 4.1.3-rt3 as base

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

diff --git a/kernel/Documentation/ABI/testing/sysfs-bus-platform b/kernel/Documentation/ABI/testing/sysfs-bus-platform
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+What:          /sys/bus/platform/devices/.../driver_override
+Date:          April 2014
+Contact:       Kim Phillips <kim.phillips@freescale.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-platform > \
+               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.