1 What: /sys/bus/platform/devices/.../driver_override
3 Contact: Kim Phillips <kim.phillips@freescale.com>
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
9 to the device. The override is specified by writing a string
10 to the driver_override file (echo vfio-platform > \
11 driver_override) and may be cleared with an empty string
12 (echo > driver_override). This returns the device to standard
13 matching rules binding. Writing to driver_override does not
14 automatically unbind the device from its current driver or make
15 any attempt to automatically load the specified driver. If no
16 driver with a matching name is currently loaded in the kernel,
17 the device will not bind to any driver. This also allows
18 devices to opt-out of driver binding using a driver_override
19 name such as "none". Only a single driver may be specified in
20 the override, there is no support for parsing delimiters.
22 What: /sys/bus/platform/devices/.../numa_node
24 Contact: Barry Song <song.bao.hua@hisilicon.com>
26 This file contains the NUMA node to which the platform device
27 is attached. It won't be visible if the node is unknown. The
28 value comes from an ACPI _PXM method or a similar firmware
29 source. Initial users for this file would be devices like
30 arm smmu which are populated by arm64 acpi_iort.
32 What: /sys/bus/platform/devices/.../msi_irqs/
34 Contact: Barry Song <song.bao.hua@hisilicon.com>
36 The /sys/devices/.../msi_irqs directory contains a variable set
37 of files, with each file being named after a corresponding msi
38 irq vector allocated to that device.
40 What: /sys/bus/platform/devices/.../msi_irqs/<N>
42 Contact: Barry Song <song.bao.hua@hisilicon.com>
44 This attribute will show "msi" if <N> is a valid msi irq