pi-blaster: Added recipe

This project enables PWM on the GPIO pins you request of a Raspberry Pi.
The technique used is extremely efficient: does not use the CPU and gives
very stable pulses

Patches have been provided to build pi-blaster using autotools, and to
remove startup script dependencies on the lsb.

Change-Id: Ie1bec0702e4520d24e4f024aafff14ddef825589
Signed-off-by: Alex J Lennon <ajlennon@dynamicdevices.co.uk>

recipes-devtools/pi-blaster/files/enable-autotools-support.patch

@@ -0,0 +1,77 @@
+Add autotools configuration files to simplify cross-compilation
+
+Upstream-Status: Submitted [https://github.com/sarfata/pi-blaster/pull/25]
+
+Signed-off-by: Alex Lennon <ajlennon@dynamicdevices.co.uk>
+
+diff -Nur git.org/Makefile git.new/Makefile
+--- git.org/Makefile	2014-06-11 15:42:26.490930706 +0100
++++ git.new/Makefile	1970-01-01 01:00:00.000000000 +0100
+@@ -1,23 +0,0 @@
+-.PHONY: all
+-all:	pi-blaster
+-
+-REVISION=$(shell egrep -q '000f$$' /proc/cpuinfo && echo 2 || echo 1)
+-
+-pi-blaster:	pi-blaster.c
+-	gcc -Wall -g -O2 -o $@ $< -DREVISION=$(REVISION)
+-
+-clean:
+-	rm -f pi-blaster
+-
+-install: pi-blaster
+-	cp -f pi-blaster.boot.sh /etc/init.d/pi-blaster
+-	chmod +x /etc/init.d/pi-blaster
+-	cp -f pi-blaster /usr/sbin/pi-blaster
+-	update-rc.d pi-blaster defaults
+-	/etc/init.d/pi-blaster start
+-	
+-uninstall:
+-	-/etc/init.d/pi-blaster stop
+-	rm /usr/sbin/pi-blaster
+-	rm /etc/init.d/pi-blaster
+-	update-rc.d pi-blaster remove
+diff -Nur git.org/Makefile.am git.new/Makefile.am
+--- git.org/Makefile.am	1970-01-01 01:00:00.000000000 +0100
++++ git.new/Makefile.am	2014-06-11 15:40:16.562930372 +0100
+@@ -0,0 +1,9 @@
++AUTOMAKE_OPTIONS = foreign
++
++CFLAGS = -Wall -pedantic
++
++sbin_PROGRAMS = pi-blaster
++pi_blaster_SOURCES = pi-blaster.c
++
++init_ddir = $(sysconfdir)/init.d
++init_d_SCRIPTS = pi-blaster.boot.sh
+diff -Nur git.org/autogen.sh git.new/autogen.sh
+--- git.org/autogen.sh	1970-01-01 01:00:00.000000000 +0100
++++ git.new/autogen.sh	2014-06-11 15:35:57.798929684 +0100
+@@ -0,0 +1,9 @@
++#!/bin/sh
++
++echo "Generating configure files... may take a while."
++
++autoreconf --install --force && \
++  echo "Preparing was successful if there was no error messages above." && \
++  echo "Now type:" && \
++  echo "  ./configure && make"  && \
++  echo "Run './configure --help' for more information"
+diff -Nur git.org/configure.ac git.new/configure.ac
+--- git.org/configure.ac	1970-01-01 01:00:00.000000000 +0100
++++ git.new/configure.ac	2014-06-11 15:35:53.154929717 +0100
+@@ -0,0 +1,14 @@
++#                                               -*- Autoconf -*-
++# Process this file with autoconf to produce a configure script.
++
++AC_PREREQ([2.69])
++AC_INIT(pi-blaster, 0.1.0)
++AC_CONFIG_SRCDIR([pi-blaster.c])
++AC_CONFIG_HEADERS([config.h])
++AM_INIT_AUTOMAKE
++
++# Checks for programs.
++AC_PROG_CC
++
++AC_CONFIG_FILES([Makefile])
++AC_OUTPUT

recipes-devtools/pi-blaster/files/remove-initscript-lsb-dependency.patch

@@ -0,0 +1,77 @@
+Remove dependencies on LSB functions
+
+Upstream-Status: Inappropriate [configuration]
+
+Signed-off-by: Alex Lennon <ajlennon@dynamicdevices.co.uk>
+
+diff -ur git.org/pi-blaster.boot.sh git/pi-blaster.boot.sh
+--- git.org/pi-blaster.boot.sh	2014-05-20 14:49:44.378582168 +0100
++++ git/pi-blaster.boot.sh	2014-05-20 14:51:08.330582386 +0100
+@@ -28,12 +28,12 @@
+ [ -r /etc/default/$NAME ] && . /etc/default/$NAME
+ 
+ # Load the VERBOSE setting and other rcS variables
+-. /lib/init/vars.sh
++#. /lib/init/vars.sh
+ 
+ # Define LSB log_* functions.
+ # Depend on lsb-base (>= 3.2-14) to ensure that this file is present
+ # and status_of_proc is working.
+-. /lib/lsb/init-functions
++#. /lib/lsb/init-functions
+ 
+ #
+ # Function that starts the daemon/service
+@@ -77,48 +77,23 @@
+ 
+ case "$1" in
+   start)
+-	[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
++	[ "$VERBOSE" != no ] && echo "Starting $DESC" "$NAME"
+ 	do_start
+-	case "$?" in
+-		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
+-		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
+-	esac
+ 	;;
+   stop)
+-	[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
++	[ "$VERBOSE" != no ] && echo "Stopping $DESC" "$NAME"
+ 	do_stop
+-	case "$?" in
+-		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
+-		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
+-	esac
+-	;;
+-  status)
+-	status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
+ 	;;
+   restart|force-reload)
+ 	#
+ 	# If the "reload" option is implemented then remove the
+ 	# 'force-reload' alias
+ 	#
+-	log_daemon_msg "Restarting $DESC" "$NAME"
+ 	do_stop
+-	case "$?" in
+-	  0|1)
+-		do_start
+-		case "$?" in
+-			0) log_end_msg 0 ;;
+-			1) log_end_msg 1 ;; # Old process is still running
+-			*) log_end_msg 1 ;; # Failed to start
+-		esac
+-		;;
+-	  *)
+-		# Failed to stop
+-		log_end_msg 1
+-		;;
+-	esac
++	do_start
+ 	;;
+   *)
+-	echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
++	echo "Usage: $SCRIPTNAME {start|stop|restart}" >&2
+ 	exit 3
+ 	;;
+ esac

recipes-devtools/pi-blaster/pi-blaster.inc

@@ -0,0 +1,22 @@
+DESCRIPTION = "This project enables PWM on the GPIO pins you request of a Raspberry Pi."
+HOMEPAGE = "https://github.com/sarfata/pi-blaster/"
+SECTION = "devel/libs"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://README.md;beginline=138;endline=151;md5=e0f0f92050a87a160939707c60940307"
+
+SRC_URI = "git://github.com/sarfata/pi-blaster \
+           file://enable-autotools-support.patch \
+           file://remove-initscript-lsb-dependency.patch \
+"
+
+S = "${WORKDIR}/git"
+
+inherit update-rc.d autotools
+
+INITSCRIPT_PACKAGES = "${PN}"
+INITSCRIPT_NAME_${PN} = "${PN}.boot.sh"
+INITSCRIPT_PARAMS_${PN} = "defaults 15 85"
+
+COMPATIBLE_MACHINE = "raspberrypi"
+
+PACKAGE_ARCH = "${MACHINE_ARCH}"

recipes-devtools/pi-blaster/pi-blaster_git.bb

@@ -0,0 +1,3 @@
+require pi-blaster.inc
+
+SRCREV = "177cef81774d6df5c6284c198ff818515281db14"