udev: Create rules file to generate serial0/1

Signed-off-by: Andrei Gherzan <andrei@gherzan.ro>

2 files changed, 33 insertions, 0 deletions

diff --git a/recipes-core/udev/udev-rules-rpi.bb b/recipes-core/udev/udev-rules-rpi.bb
new file mode 100644
index 0000000..20443d3
--- /dev/null
+++ b/recipes-core/udev/udev-rules-rpi.bb
@@ -0,0 +1,12 @@
+DESCRIPTION = "udev rules for Raspberry Pi Boards"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
+
+SRC_URI = " file://99-com.rules"
+
+S = "${WORKDIR}"
+
+do_install () {
+    install -d ${D}${sysconfdir}/udev/rules.d
+    install -m 0644 ${WORKDIR}/99-com.rules ${D}${sysconfdir}/udev/rules.d/
+}
diff --git a/recipes-core/udev/udev-rules-rpi/99-com.rules b/recipes-core/udev/udev-rules-rpi/99-com.rules
new file mode 100644
index 0000000..6bf019b
--- /dev/null
+++ b/recipes-core/udev/udev-rules-rpi/99-com.rules
@@ -0,0 +1,21 @@
+KERNEL=="ttyAMA[01]", PROGRAM="/bin/sh -c '\
+        ALIASES=/proc/device-tree/aliases; \
+        if cmp -s $ALIASES/uart0 $ALIASES/serial0; then \
+                echo 0;\
+        elif cmp -s $ALIASES/uart0 $ALIASES/serial1; then \
+                echo 1; \
+        else \
+                exit 1; \
+        fi\
+'", SYMLINK+="serial%c"
+
+KERNEL=="ttyS0", PROGRAM="/bin/sh -c '\
+        ALIASES=/proc/device-tree/aliases; \
+        if cmp -s $ALIASES/uart1 $ALIASES/serial0; then \
+                echo 0; \
+        elif cmp -s $ALIASES/uart1 $ALIASES/serial1; then \
+                echo 1; \
+        else \
+                exit 1; \
+        fi \
+'", SYMLINK+="serial%c"