gnu: Add bcm2835.

* gnu/packages/raspberry-pi.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.

gnu/local.mk

@@ -466,6 +466,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/packages/radio.scm			\
   %D%/packages/ragel.scm			\
   %D%/packages/rails.scm			\
+  %D%/packages/raspberry-pi.scm			\
   %D%/packages/ratpoison.scm			\
   %D%/packages/rcm.scm				\
   %D%/packages/rdesktop.scm			\

gnu/packages/raspberry-pi.scm

@@ -0,0 +1,64 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2020 Danny Milosavljevic <dannym@scratchpost.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages raspberry-pi)
+  #:use-module (gnu packages)
+  #:use-module (gnu packages admin)
+  #:use-module (gnu packages algebra)
+  #:use-module (gnu packages base)
+  #:use-module (gnu packages documentation)
+  #:use-module (gnu packages embedded)
+  #:use-module (guix build-system gnu)
+  #:use-module (guix download)
+  #:use-module (guix git-download)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (guix packages)
+  #:use-module (guix gexp)
+  #:use-module (guix store)
+  #:use-module (guix monads)
+  #:use-module (guix utils)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-2)
+  #:use-module (srfi srfi-26)
+  #:use-module (ice-9 match))
+
+(define-public bcm2835
+  (package
+    (name "bcm2835")
+    (version "1.64")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "http://www.airspayce.com/mikem/bcm2835/bcm2835-"
+                    version ".tar.gz"))
+              (sha256
+               (base32
+                "06s81540iz4vsh0cm6jwah2x0hih79v42pfa4pgr8kcbv56158h6"))))
+    (build-system gnu-build-system)
+    (arguments
+     `(#:tests? #f))    ; Would need to be root
+    ;; doc/html docs would not be installed anyway.
+    ;(native-inputs
+    ; `(("doxygen", doxygen)))
+    (synopsis "C library for Broadcom BCM 2835 as used in Raspberry Pi")
+    (description "This package provides a C library for Broadcom BCM 2835 as
+used in the Raspberry Pi")
+    (home-page "http://www.airspayce.com/mikem/bcm2835/")
+    (supported-systems '("armhf-linux" "aarch64-linux"))
+    (license license:gpl3)))
+