1 files changed, 130 insertions, 0 deletions
diff --git a/recipes-bsp/multitech/mt-dt-overlay/init-default b/recipes-bsp/multitech/mt-dt-overlay/init-default
new file mode 100755
index 0000000..4c82e12
--- /dev/null
+++ b/recipes-bsp/multitech/mt-dt-overlay/init-default
@@ -0,0 +1,130 @@
+#!/bin/bash
+# This script must be run after mts-io
+# to read the hw-version,
+# but before anything else needs the
+# device tree.
+sysdir=/sys/devices/platform/mts-io
+
+I2CDIR="/sys/bus/i2c/devices"
+eepromPath="${I2CDIR}/0-0056/eeprom"
+
+DEVTREE="/sys/kernel/config/device-tree/overlays/"
+SYSFS="/usr/sbin/mts-io-sysfs"
+AP1_EEPROM=${I2CDIR}"/1-0050/eeprom"
+AP2_EEPROM=${I2CDIR}"/1-0052/eeprom"
+
+install_all_dtbo() {
+    for f in *.dtbo ; do
+        if ! [[ -f $f ]] ; then
+            continue
+        fi
+        # f2 is the extracted device name
+        base=$(basename $f .dtbo)
+        /bin/mkdir ${DEVTREE}/$base || true
+        /bin/cat $f >${DEVTREE}/$base/dtbo
+    done
+}
+
+install_dtbo_dir() {
+    if ! [[ -d ${DEVTREE} ]] ; then
+        mount configfs
+    fi
+    install_all_dtbo
+    gpiob1=0
+    gpiob2=0
+    if [[ -f $AP1_EEPROM ]] ; then
+	eeprom1=$(mts-id-eeprom --accessory-card --in-file "$AP1_EEPROM" 2>/dev/null)
+	if [[ $eeprom1 =~ [[:space:]]hw-version:[[:space:]]*\"MTAC-GPIOB- ]] ; then
+	   gpiob1=1
+	fi
+    fi
+    if [[ -f $AP2_EEPROM ]] ; then
+	eeprom2=$(mts-id-eeprom --accessory-card --in-file "$AP2_EEPROM" 2>/dev/null)
+	if [[ $eeprom2 =~ [[:space:]]hw-version:[[:space:]]*\"MTAC-GPIOB- ]] ; then
+	   gpiob2=1
+	fi
+    fi
+
+    if ((gpiob1 == 1)) || ((gpiob2 == 1)) ; then
+        /usr/bin/logger -t "mts-io" -p daemon.info -s 'Loading MTAC-GPIOB Device Tree'
+        cd gpiob
+    else
+        /usr/bin/logger -t "mts-io" -p daemon.info -s 'Loading standard SPI Device Tree'
+        cd lora
+    fi
+    install_all_dtbo
+}
+
+# Device tree format:
+# [mach]
+#     [rev]
+#          [file1] [file2] [file3] capability
+#              [flag]
+#                  [file1] [file2] [file3]
+setdevtree() {
+    eeprom=$(mts-id-eeprom --in-file "$eepromPath" 2>/dev/null)
+    [[ $eeprom =~ [[:space:]]hw-version:[[:space:]]*\"([^\"]+) ]]
+    hw=${BASH_REMATCH[1]}
+    mach=${hw/%-*}
+    rev=${hw/#*-/}
+    echo mach is $mach
+    echo rev is $rev
+
+    regx='capa-(.*):[[:space:]]*true'
+    capflags=$(echo "$eeprom" | egrep "$regx" | sed -e 's/capa-//g' -e 's/: true//')
+    capflags=" ${capflags} "
+
+    # add device tree overlays, if they exist.
+    [[ -d /lib/dtoverlays ]] || return 1
+    (
+    cd /lib/dtoverlays
+    
+    cd ${mach}
+    
+    best="-1"
+    for d in * ; do
+        if awk "BEGIN{if ($d <= $rev)exit 1}" ; then
+            continue
+        fi
+        if awk "BEGIN{if ($d < $best)exit 1}" ; then
+            best="$d"
+        fi
+    done
+    if [[ $best == -1 ]] ; then
+        # No overlay found
+    exit 0
+    fi
+    cd $best
+    install_dtbo_dir
+    if [[ -d capability ]] ; then
+        cd capability
+        for d in * ; do
+            echo "We have found overlay capability directory $d"
+            if [[ ${capflags} =~ [[:space:]]${d}[[:space:]] ]] ; then
+                echo "This device has capabilithy $d so install the overlay"
+                (
+                    cd $d
+                    install_dtbo_dir
+                )
+            fi # Does a given capability flag exist in the EEPROM
+        done # Loop over all capabilities for this machine and version overlays
+    fi # Is there a capability directory to be installed?
+    )
+}
+
+case $1 in
+  start)
+    /usr/bin/logger -t "mts-io" -p daemon.info -s "Loading device tree overlay"
+    setdevtree
+    ;;
+
+  stop)
+    echo "Not implemented"
+    ;;
+
+  *)
+    echo "Usage: $0 {start|stop}"
+    exit 2
+    ;;
+esac
+