src/sys/dev/terasic/de4led, branch main

Remove terasic drivers used on the Cambridge BERI tablet.

2022-01-27T19:01:51+00:00

Reviewed by:	brooks
Sponsored by:	The University of Cambridge, Google Inc.
Differential Revision:	https://reviews.freebsd.org/D34057

sys/dev: further adoption of SPDX licensing ID tags.

2017-11-27T14:52:40+00:00

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Follow r261352 by updating all drivers which are children of simplebus

2014-02-02T19:17:28+00:00

to check the status property in their probe routines.

Simplebus used to only instantiate its children whose status="okay"
but that was improper behavior, fixed in r261352.  Now that it doesn't
check anymore and probes all its children; the children all have to
do the check because really only the children know how to properly
interpret their status property strings.

Right now all existing drivers only understand "okay" versus something-
that's-not-okay, so they all use the new ofw_bus_status_okay() helper.

Hints-only devices should have BUS_PROBE_NOWILDCARD set. We probably need

2013-10-29T13:43:09+00:00

a better flag for this (in the driver metadata, for example).

Merge Perforce changeset 219952 to head:

2013-01-13T16:57:11+00:00

  Make different bus attachments for Altera and Terasice
  device drivers share the same devclass_t.

Sponsored by:	DARPA, AFRL

Partially merge Perforce changeset 219944 to head:

2013-01-13T16:53:31+00:00

  Consistently use the vendor name "sri-cambridge" for device
  compatibility strings on the BERI platform.

Sponsored by:	DARPA, AFRL

Merge Perforce changeset 219922 to head:

2013-01-13T15:12:35+00:00

  Update nexus parts in copied DE4LED attachment to use FDT.

Sponsored by:	DARPA, AFRL

Merge Perforce changeset 219921 to head:

2013-01-13T15:10:27+00:00

  Copy DE4 LED nexus bus attachment as a starting point for an FDT
  attachment.

Sponsored by:	DARPA, AFRL

Add terasic_de4led, a led(4) driver for the on-board 8-element LED on the

2012-08-26T09:21:59+00:00

Terasic DE-4 board.  Allow LED configuration to be set using loader
tunables, not just from userspace, and preconfigure LED 8 as a kernel
heartbeat.  For now, this is a Nexus-attached, BERI-only driver, but it
could be used with other hard and soft cores on Altera FPGAs as well, in
principle.

Sponsored by:	DARPA, AFRL