| 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. |