1 Introduction
2 ============
3
4 The FPGA subsystem supports reprogramming FPGA
5 Linux. Some of the core intentions of the FPG
6
7 * The FPGA subsystem is vendor agnostic.
8
9 * The FPGA subsystem separates upper layers (u
10 enumeration) from lower layers that know how
11 FPGA.
12
13 * Code should not be shared between upper and
14 should go without saying. If that seems nec
15 framework functionality that can be added th
16 other users. Write the linux-fpga mailing l
17 seek out a solution that expands the framewo
18
19 * Generally, when adding code, think of the fu
20
21 The framework in the kernel is divided into:
22
23 FPGA Manager
24 ------------
25
26 If you are adding a new FPGA or a new method o
27 this is the subsystem for you. Low level FPGA
28 the knowledge of how to program a specific dev
29 includes the framework in fpga-mgr.c and the l
30 are registered with it.
31
32 FPGA Bridge
33 -----------
34
35 FPGA Bridges prevent spurious signals from goi
36 region of an FPGA during programming. They ar
37 programming begins and re-enabled afterwards.
38 actual hard hardware that gates a bus to a CPU
39 bridge in FPGA fabric that surrounds a partial
40 of an FPGA. This subsystem includes fpga-brid
41 drivers that are registered with it.
42
43 FPGA Region
44 -----------
45
46 If you are adding a new interface to the FPGA
47 of an FPGA region.
48
49 The FPGA Region framework (fpga-region.c) asso
50 bridges as reconfigurable regions. A region m
51 FPGA in full reconfiguration or to a partial r
52
53 The Device Tree FPGA Region support (of-fpga-r
54 reprogramming FPGAs when device tree overlays
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