On Tue, Jun 12, 2018 at 5:10 AM, Wu Hao [off-list ref] wrote:

For feature devices drivers, both the FPGA Management Engine (FME) and
Accelerated Function Unit (AFU) driver need to expose user interfaces via
the device file, for example, mmap and ioctls.

This patch adds chardev support in the dfl driver for feature devices,
FME and AFU. It reserves the chardev regions for FME and AFU, and provide
interfaces for FME and AFU driver to register their device file operations.

Signed-off-by: Tim Whisonant <redacted>
Signed-off-by: Enno Luebbers <redacted>
Signed-off-by: Shiva Rao <redacted>
Signed-off-by: Christopher Rauer <redacted>
Signed-off-by: Zhang Yi <redacted>
Signed-off-by: Xiao Guangrong <redacted>
Signed-off-by: Wu Hao <redacted>

Acked-by: Alan Tull <atull@kernel.org>

---
v2: rebased
v3: move chardev support to fpga-dfl framework
v4: rebase, and add more comments in code.
v5: rebase, and add dfl_ prefix to APIs and data structures.
v6: add index in dfl_devs to link to dfl_chrdevs.
    improve naming on APIs.