This is a Linux industrial I/O (IIO) subsystem driver, targeting serial interface accelerometers. The industrial I/O subsystem provides a unified framework for drivers for many different types of converters and sensors using a number of different physical interfaces (i2c, spi, etc). See IIO for more information.
| Function | File |
|---|---|
| core driver | drivers/iio/accel/adxl313_core.c |
| spi driver | drivers/iio/accel/adxl313_spi.c |
| i2c driver | drivers/iio/accel/adxl313_i2c.c |
| header | drivers/iio/accel/adxl313.h |
| Documentation | adi,adxl313.yaml |
Required devicetree properties:
Required properties for SPI bus usage:
Optional properties:
Example for a SPI device node:
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
spi {
#address-cells = <1>;
#size-cells = <0>;
/* Example for a SPI device node */
accelerometer@0 {
compatible = "adi,adxl313";
reg = <0>;
spi-max-frequency = <5000000>;
interrupt-parent = <&gpio0>;
interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
interrupt-names = "INT1";
};
};
Example for a I2C device node:
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
i2c0 {
#address-cells = <1>;
#size-cells = <0>;
/* Example for a I2C device node */
accelerometer@53 {
compatible = "adi,adxl313";
reg = <0x53>;
interrupt-parent = <&gpio0>;
interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
interrupt-names = "INT1";
};
};
This specifies any shell prompt running on the target
root@analog:~# **cd /sys/bus/iio/devices/**
root@analog:/sys/bus/iio/devices# **ls**
iio:device0 iio_sysfs_trigger
root@analog:/sys/bus/iio/devices# **cd iio\:device0**
root@analog:/sys/bus/iio/devices/iio:device0# **ls -l**
total 0
-r--r--r-- 1 root root 4096 Sep 23 14:33 dev
-rw-r--r-- 1 root root 4096 Sep 23 14:33 in_accel_sampling_frequency
-r--r--r-- 1 root root 4096 Sep 23 14:33 in_accel_sampling_frequency_available
-rw-r--r-- 1 root root 4096 Sep 23 14:33 in_accel_scale
-rw-r--r-- 1 root root 4096 Sep 23 14:33 in_accel_x_calibbias
-rw-r--r-- 1 root root 4096 Sep 23 14:33 in_accel_x_raw
-rw-r--r-- 1 root root 4096 Sep 23 14:33 in_accel_y_calibbias
-rw-r--r-- 1 root root 4096 Sep 23 14:33 in_accel_y_raw
-rw-r--r-- 1 root root 4096 Sep 23 14:33 in_accel_z_calibbias
-rw-r--r-- 1 root root 4096 Sep 23 14:33 in_accel_z_raw
-r--r--r-- 1 root root 4096 Sep 23 14:33 name
lrwxrwxrwx 1 root root 0 Sep 23 14:33 of_node -> ../../../../../../../../firmware/devicetree/base/soc/spi@7e204000/adxl313@0
drwxr-xr-x 2 root root 0 Sep 23 14:33 power
lrwxrwxrwx 1 root root 0 Sep 23 14:33 subsystem -> ../../../../../../../../bus/iio
-rw-r--r-- 1 root root 4096 Sep 23 14:33 uevent
This specifies any shell prompt running on the target
root@analog:/sys/bus/iio/devices/iio:device0# **cat name**
adxl313
Description:
scale to be applied to in_accel_*_raw in order to obtain the acceleration.
This specifies any shell prompt running on the target
root@analog:/sys/bus/iio/devices/iio:device0# **cat in_accel_scale**
0.009576806
Description:
Raw unscaled acceleration measurement on x axis
This specifies any shell prompt running on the target
root@analog:/sys/bus/iio/devices/iio:device0# **cat in_accel_x_raw**
-14
This specifies any shell prompt running on the target
root@analog:/sys/bus/iio/devices/iio:device0# **cat in_accel_sampling_frequency_available**
6.250000 12.500000 25.000000 50.000000 100.000000 200.000000 400.000000 800.000000 1600.000000 3200.000000
root@analog:/sys/bus/iio/devices/iio:device0# **cat in_accel_sampling_frequency**
100.000000
root@analog:/sys/bus/iio/devices/iio:device0# **echo 12.5 > in_accel_sampling_frequency**
root@analog:/sys/bus/iio/devices/iio:device0# **cat in_accel_sampling_frequency**
12.500000
This specifies any shell prompt running on the target
root@analog:/sys/bus/iio/devices/iio:device0# **cat in_accel_z_calibbias**
0
root@analog:/sys/bus/iio/devices/iio:device0# **echo 4 > in_accel_z_calibbias**
root@analog:/sys/bus/iio/devices/iio:device0# **cat in_accel_z_calibbias**
4