1 What: /sys/bus/amba/devices/.../driv 1 What: /sys/bus/amba/devices/.../driver_override
2 Date: September 2014 2 Date: September 2014
3 Contact: Antonios Motakis <a.motakis@vir 3 Contact: Antonios Motakis <a.motakis@virtualopensystems.com>
4 Description: 4 Description:
5 This file allows the driver fo 5 This file allows the driver for a device to be specified which
6 will override standard OF, ACP 6 will override standard OF, ACPI, ID table, and name matching.
7 When specified, only a driver 7 When specified, only a driver with a name matching the value
8 written to driver_override wil 8 written to driver_override will have an opportunity to bind to
9 the device. The override is sp 9 the device. The override is specified by writing a string to the
10 driver_override file (echo vfi 10 driver_override file (echo vfio-amba > driver_override) and may
11 be cleared with an empty strin 11 be cleared with an empty string (echo > driver_override).
12 This returns the device to sta 12 This returns the device to standard matching rules binding.
13 Writing to driver_override doe 13 Writing to driver_override does not automatically unbind the
14 device from its current driver 14 device from its current driver or make any attempt to
15 automatically load the specifi 15 automatically load the specified driver. If no driver with a
16 matching name is currently loa 16 matching name is currently loaded in the kernel, the device will
17 not bind to any driver. This a 17 not bind to any driver. This also allows devices to opt-out of
18 driver binding using a driver_ 18 driver binding using a driver_override name such as "none".
19 Only a single driver may be sp 19 Only a single driver may be specified in the override, there is
20 no support for parsing delimit 20 no support for parsing delimiters.
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