Update LIN demo to use lin-config

Changes include:
- Add patch to fix lin-config recipe build QA error.
- Tweak lin-config recipe to install lin_config as executable.
- Rework sllin-demo systemd unit and start_lin_demo.sh script to use
  lin_config with an appropriate configuration file that enables
  polling of the steering wheel adapter instead of just using
  ldattach.

Bug-AGL: SPEC-2918

Change-Id: I3258b7e34cecbbb1cfb93ea6f63a44f0bbb2c06f
Signed-off-by: Scott Murray <scott.murray@konsulko.com>

2 files changed, 23 insertions, 5 deletions

diff --git a/recipes-support/lin-config/files/0002-Change-Makefile-to-use-LDFLAGS.patch b/recipes-support/lin-config/files/0002-Change-Makefile-to-use-LDFLAGS.patch
new file mode 100644
index 000000000..26364455a
--- /dev/null
+++ b/recipes-support/lin-config/files/0002-Change-Makefile-to-use-LDFLAGS.patch
@@ -0,0 +1,20 @@
+Use LDFLAGS when linking
+
+Use LDFLAGS when linking the output binary to quiet QA warnings due to
+missing link flags.
+
+Upstream-Status: Pending
+
+Signed-off-by: Scott Murray <scott.murray@konsulko.com>
+
+--- a/Makefile	2019-11-05 11:08:11.060565285 +0000
++++ b/Makefile	2019-11-05 11:09:38.663570084 +0000
+@@ -6,7 +6,7 @@
+ objects = linc_parse_xml.o pcl_config.o sllin_config.o lin_config.o
+ 
+ lin_config: $(objects)
+-	$(CC) $(objects) $(LIBS) -o lin_config
++	$(CC) $(LDFLAGS) $(objects) $(LIBS) -o lin_config
+ 
+ %.o : %.c %.h
+ 	$(CC) $(CFLAGS) $(LIBS) -c $< -o $@
diff --git a/recipes-support/lin-config/lin-config_git.bb b/recipes-support/lin-config/lin-config_git.bb
index 6c8db847d..e83f71606 100644
--- a/recipes-support/lin-config/lin-config_git.bb
+++ b/recipes-support/lin-config/lin-config_git.bb
@@ -2,7 +2,6 @@ DESCRIPTION = "lin-config tool for the sllin driver module"
 LICENSE = "GPLv2"
 LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/GPL-2.0;md5=801f80980d171dd6425610833a22dbe6"
 
-
 DEPENDS += "libnl libxml2"
 
 SRC_URI = "git://github.com/trainman419/linux-lin.git;protocol=https"
@@ -11,17 +10,16 @@ S = "${WORKDIR}/git/lin_config/src"
 
 SRC_URI_append = " \
 	file://0001-Change-Makefile-to-use-pkg-config-for-libxml-2.0.patch \
+	file://0002-Change-Makefile-to-use-LDFLAGS.patch \
 	"
 
 inherit pkgconfig
 
 PV = "0.1+git${SRCPV}"
 
-
 do_configure[noexec] = "1"
 
 do_install_append() {
-
     install -d ${D}/${bindir}
-    install -m 644 ${S}/lin_config ${D}/${bindir}
-}
\ No newline at end of file
+    install -m 755 ${S}/lin_config ${D}/${bindir}
+}