adxl345.sh

#!/bin/sh
echo 7 > /proc/sys/kernel/printk
dmesg -n 7
OVLY=/sys/kernel/config/device-tree/overlays/accel
mkdir -p $OVLY
cat $OVLY/status
dtc -W no-unit_address_vs_reg -@ -o $OVLY/dtbo <<EOF
/dts-v1/;
/plugin/;
/ {
	fragment@0 {
		target = <&i2c1>;
		__overlay__ {
			#address-cells = <1>;
			#size-cells = <0>;
			accel@53 {
				compatible = "adi,adxl345";
				reg = <0x53>;
				interrupt-parent = <&intc>;
				interrupts = <69>;  // timer3
			};
		};
	};

	fragment@1 {
		target = <&timer3>;
		__overlay__ {
			status = "okay";
			clock-frequency = <1>;	// 1 Hz
		};
	};
};
EOF
cat $OVLY/status
modprobe adxl34x-i2c
dmesg | tail