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1What: /sys/bus/platform/devices/.../driver_override2Date: April 20143Contact: Kim Phillips <kim.phillips@freescale.com>4Description:5 This file allows the driver for a device to be specified which6 will override standard OF, ACPI, ID table, and name matching.7 When specified, only a driver with a name matching the value8 written to driver_override will have an opportunity to bind9 to the device. The override is specified by writing a string10 to the driver_override file (echo vfio-platform > \11 driver_override) and may be cleared with an empty string12 (echo > driver_override). This returns the device to standard13 matching rules binding. Writing to driver_override does not14 automatically unbind the device from its current driver or make15 any attempt to automatically load the specified driver. If no16 driver with a matching name is currently loaded in the kernel,17 the device will not bind to any driver. This also allows18 devices to opt-out of driver binding using a driver_override19 name such as "none". Only a single driver may be specified in20 the override, there is no support for parsing delimiters.21 22What: /sys/bus/platform/devices/.../numa_node23Date: June 202024Contact: Barry Song <song.bao.hua@hisilicon.com>25Description:26 This file contains the NUMA node to which the platform device27 is attached. It won't be visible if the node is unknown. The28 value comes from an ACPI _PXM method or a similar firmware29 source. Initial users for this file would be devices like30 arm smmu which are populated by arm64 acpi_iort.31 32What: /sys/bus/platform/devices/.../msi_irqs/33Date: August 202134Contact: Barry Song <song.bao.hua@hisilicon.com>35Description:36 The /sys/devices/.../msi_irqs directory contains a variable set37 of files, with each file being named after a corresponding msi38 irq vector allocated to that device.39 40What: /sys/bus/platform/devices/.../msi_irqs/<N>41Date: August 202142Contact: Barry Song <song.bao.hua@hisilicon.com>43Description:44 This attribute will show "msi" if <N> is a valid msi irq45 46What: /sys/bus/platform/devices/.../modalias47Description:48 Same as MODALIAS in the uevent at device creation.49 50 A platform device that it is exposed via devicetree uses:51 52 - of:N`of node name`T`type`53 54 Other platform devices use, instead:55 56 - platform:`driver name`57