gpio-export: add recipe for userspace export of gpios

5 files changed, 95 insertions, 0 deletions

diff --git a/recipes-bsp/gpio-export/files/COPYING b/recipes-bsp/gpio-export/files/COPYING
new file mode 100644
index 0000000..040e990
--- /dev/null
+++ b/recipes-bsp/gpio-export/files/COPYING
@@ -0,0 +1,5 @@
+This piece is software is provided by Toradex AG as sample code.
+There is no warranty for the program.
+Toradex AG put this program in public domain, uncopyrighted.
+
+Renens, Swizterland, 2008-10-23
diff --git a/recipes-bsp/gpio-export/files/apalis-imx6/gpio-export.sh b/recipes-bsp/gpio-export/files/apalis-imx6/gpio-export.sh
new file mode 100644
index 0000000..bdfdcab
--- /dev/null
+++ b/recipes-bsp/gpio-export/files/apalis-imx6/gpio-export.sh
@@ -0,0 +1,44 @@
+#!/bin/sh
+#export gpios to userspace
+
+case "$1" in
+	start)
+		CTRL=/sys/class/gpio/export
+	;;
+	
+	stop)
+		CTRL=/sys/class/gpio/unexport
+	;;
+esac
+
+#Apalis GPIO - i.MX6 Ball name - GPIO#
+
+#GPIO1 NAND_DATA04 36
+echo 36 > $CTRL
+#cat /sys/class/gpio/gpio36/value
+#echo low  > /sys/class/gpio/gpio36/direction
+#echo 1 > /sys/class/gpio/gpio36/value
+
+#GPIO2 NAND_DATA05 37
+echo 37 > $CTRL
+
+#GPIO3 NAND_DATA06 38
+echo 38 > $CTRL
+
+#GPIO4 NAND_DATA07 39
+echo 39 > $CTRL
+
+#GPIO5 NAND_READY 170
+#used by optional fusion_F0710A kernel module
+#echo 170 > $CTRL
+
+#GPIO6 NAND_WP_B 169
+#used by optional fusion_F0710A kernel module
+#echo 169 > $CTRL
+
+#GPIO7 GPIO02 2
+#used by PCIe for reset of switch on the Apalis Evaluation Board
+#echo 2 > $CTRL
+
+#GPIO8 GPIO06 6
+echo 6 > $CTRL
diff --git a/recipes-bsp/gpio-export/files/gpio-export.service b/recipes-bsp/gpio-export/files/gpio-export.service
new file mode 100644
index 0000000..2dccc29
--- /dev/null
+++ b/recipes-bsp/gpio-export/files/gpio-export.service
@@ -0,0 +1,12 @@
+[Unit]
+Description=Export GPIOs to user space
+DefaultDependencies=no
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/usr/bin/export-gpio.sh start
+ExecStop=/usr/bin/export-gpio.sh stop
+
+[Install]
+WantedBy=basic.target
diff --git a/recipes-bsp/gpio-export/files/gpio-export.sh b/recipes-bsp/gpio-export/files/gpio-export.sh
new file mode 100644
index 0000000..6a477c6
--- /dev/null
+++ b/recipes-bsp/gpio-export/files/gpio-export.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+#empty placeholder for machines not using that feature
+
+:
diff --git a/recipes-bsp/gpio-export/gpio-export_1.0.bb b/recipes-bsp/gpio-export/gpio-export_1.0.bb
new file mode 100644
index 0000000..02d0fd7
--- /dev/null
+++ b/recipes-bsp/gpio-export/gpio-export_1.0.bb
@@ -0,0 +1,30 @@
+DESCRIPTION = "Scripts and systemd service file to export unused GPIO to Userspace"
+LICENSE = "Public Domain"
+PR = "r2"
+
+inherit systemd
+
+SRC_URI =  " \
+    file://gpio-export.sh \
+    file://gpio-export.service \
+    file://COPYING \
+"
+
+LIC_FILES_CHKSUM = "file://${WORKDIR}/COPYING;md5=1c3a7fb45253c11c74434676d84fe7dd"
+
+do_compile () {
+}
+
+do_install () {
+    install -d ${D}/${bindir}
+    install -m 0755 ${WORKDIR}/*.sh ${D}/${bindir}
+
+    install -d ${D}${systemd_unitdir}/system/
+    install -m 0644 ${WORKDIR}/gpio-export.service ${D}${systemd_unitdir}/system
+}
+
+NATIVE_SYSTEMD_SUPPORT = "1"
+SYSTEMD_PACKAGES = "${PN}"
+SYSTEMD_SERVICE_${PN} = "gpio-export.service"
+
+PACKAGE_ARCH = "${MACHINE_ARCH}"
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