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3cf38571 AM |
1 | What: /sys/bus/amba/devices/.../driver_override |
2 | Date: September 2014 | |
3 | Contact: Antonios Motakis <a.motakis@virtualopensystems.com> | |
4 | Description: | |
5 | This file allows the driver for a device to be specified which | |
6 | will override standard OF, ACPI, ID table, and name matching. | |
7 | When specified, only a driver with a name matching the value | |
8 | written to driver_override will have an opportunity to bind to | |
9 | the device. The override is specified by writing a string to the | |
10 | driver_override file (echo vfio-amba > driver_override) and may | |
11 | be cleared with an empty string (echo > driver_override). | |
12 | This returns the device to standard matching rules binding. | |
13 | Writing to driver_override does not automatically unbind the | |
14 | device from its current driver or make any attempt to | |
15 | automatically load the specified driver. If no driver with a | |
16 | matching name is currently loaded in the kernel, the device will | |
17 | not bind to any driver. This also allows devices to opt-out of | |
18 | driver binding using a driver_override name such as "none". | |
19 | Only a single driver may be specified in the override, there is | |
20 | no support for parsing delimiters. |