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linux-next/Documentation/ABI/testing/sysfs-bus-dfl
Xu Yilun 9ba3a0aa09 fpga: dfl: create a dfl bus type to support DFL devices
A new bus type "dfl" is introduced for private features which are not
initialized by DFL feature drivers (dfl-fme & dfl-afu drivers). So these
private features could be handled by separate driver modules.

DFL feature drivers (dfl-fme, dfl-port) will create DFL devices on
enumeration. DFL drivers could be registered on this bus to match these
DFL devices. They are matched by dfl type & feature_id.

[mdf@kernel.org: Add missing Documentation part to MAINTAINERS file]

Signed-off-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Wu Hao <hao.wu@intel.com>
Signed-off-by: Matthew Gerlach <matthew.gerlach@linux.intel.com>
Signed-off-by: Russ Weight <russell.h.weight@intel.com>
Reviewed-by: Tom Rix <trix@redhat.com>
Acked-by: Wu Hao <hao.wu@intel.com>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
2020-09-09 20:28:16 -07:00

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What: /sys/bus/dfl/devices/dfl_dev.X/type
Date: Aug 2020
KernelVersion: 5.10
Contact: Xu Yilun <yilun.xu@intel.com>
Description: Read-only. It returns type of DFL FIU of the device. Now DFL
supports 2 FIU types, 0 for FME, 1 for PORT.
Format: 0x%x
What: /sys/bus/dfl/devices/dfl_dev.X/feature_id
Date: Aug 2020
KernelVersion: 5.10
Contact: Xu Yilun <yilun.xu@intel.com>
Description: Read-only. It returns feature identifier local to its DFL FIU
type.
Format: 0x%x