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#!/bin/bash
# This script must be run only to set up device tree on new devices
# as part of manufacturing process when EEPROMs are empty
DEVTREE="/sys/kernel/config/device-tree/overlays/"
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}/$base/dtbo
done
}
load_overlay() {
if ! pushd /lib/dtoverlays ; then
echo "Can't find device tree overlays"
return 1
fi
# Detect PCA9557 I2C GPIO at 0x19 on I2C bus 1
RES_="$(/usr/sbin/i2cdetect -r -y 1 0x19 0x19)"
if [[ "$RES_" =~ .*(^10:[[:blank:]]+19).* ]]; then
if ! pushd MTCDT3AC/0.1 ; then
echo "Can't find MTCDT3AC/0.1 direcotry"
popd
return 1
fi
echo "Loading device tree overlay for MTCDT3AC v 0.1"
install_all_dtbo
popd
fi
# Detect MCP23008 I2C GPIO at 0x21 on I2C bus 1
RES_="$(/usr/sbin/i2cdetect -r -y 1 0x21 0x21)"
if [[ "$RES_" =~ .*(^20:[[:blank:]]+21).* ]]; then
if ! pushd MTCDT3AC/0.0 ; then
echo "Can't find MTCDT3AC/0.0 direcotry"
popd
return 1
fi
echo "Loading device tree overlay for MTCDT3AC v 0.0"
install_all_dtbo
popd
fi
popd
}
case $1 in
start)
echo "Loading device tree overlay"
load_overlay
;;
stop)
echo "Not implemented"
;;
*)
echo "Usage: $0 {start|stop}"
exit 2
;;
esac
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