kernel/linux.git/include/uapi/linux/iio, branch v6.6.131

iio: add modifers for pitch, yaw, roll

2022-09-21T17:42:55+00:00

Add modifiers for reporting rotations as euler angles (i.e. yaw, pitch and roll). Signed-off-by: Andrea Merello Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20220907132205.28021-5-andrea.merello@iit.it Signed-off-by: Jonathan Cameron

iio: add modifiers for linear acceleration

2022-09-21T17:42:55+00:00

Add IIO_MOD_LINEAR_X, IIO_MOD_LINEAR_Y and IIO_MOD_LINEAR_Z modifiers to te IIO core, which is preparatory for adding the Bosch BNO055 IMU driver. Bosch BNO055 IMU can report raw accelerations (among x, y and z axis) as well as the so called "linear accelerations" (again, among x, y and z axis) which is basically the acceleration after subtracting gravity and for which those new modifiers are for. Signed-off-by: Andrea Merello Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20220907132205.28021-2-andrea.merello@iit.it Signed-off-by: Jonathan Cameron

iio: Add new event type gesture and use direction for single and double tap

2022-09-05T17:08:42+00:00

Add new event type for tap called gesture and the direction can be used to differentiate single and double tap. This may be used by accelerometer sensors to express single and double tap events. For directional tap, modifiers like IIO_MOD_(X/Y/Z) can be used along with singletap and doubletap direction. Signed-off-by: Jagath Jog J Link: https://lore.kernel.org/r/20220831063117.4141-2-jagathjog1996@gmail.com Signed-off-by: Jonathan Cameron

iio: introduce mag_referenced

2022-02-21T19:33:05+00:00

Some accelerometers that support activity and inactivity events also support a referenced mode, in which the gravitational acceleration is taken as a point of reference before comparing the acceleration to the specified activity and inactivity magnitude. For example, in the case of the ADXL367, for activity detection, the formula is: abs(acceleration - reference) > magnitude Add a new event type that makes this behavior clear. Signed-off-by: Cosmin Tanislav Link: https://lore.kernel.org/r/20220214073810.781016-2-cosmin.tanislav@analog.com Signed-off-by: Jonathan Cameron

iio: buffer: add ioctl() to support opening extra buffers for IIO device

2021-03-11T20:47:05+00:00

With this change, an ioctl() call is added to open a character device for a buffer. The ioctl() number is 'i' 0x91, which follows the IIO_GET_EVENT_FD_IOCTL ioctl. The ioctl() will return an FD for the requested buffer index. The indexes are the same from the /sys/iio/devices/iio:deviceX/bufferY (i.e. the Y variable). Since there doesn't seem to be a sane way to return the FD for buffer0 to be the same FD for the /dev/iio:deviceX, this ioctl() will return another FD for buffer0 (or the first buffer). This duplicate FD will be able to access the same buffer object (for buffer0) as accessing directly the /dev/iio:deviceX chardev. Also, there is no IIO_BUFFER_GET_BUFFER_COUNT ioctl() implemented, as the index for each buffer (and the count) can be deduced from the '/sys/bus/iio/devices/iio:deviceX/bufferY' folders (i.e the number of bufferY folders). Used following C code to test this: ------------------------------------------------------------------- #include #include #include #include #include #define IIO_BUFFER_GET_FD_IOCTL _IOWR('i', 0x91, int) int main(int argc, char *argv[]) { int fd; int fd1; int ret; if ((fd = open("/dev/iio:device0", O_RDWR))<0) { fprintf(stderr, "Error open() %d errno %d\n",fd, errno); return -1; } fprintf(stderr, "Using FD %d\n", fd); fd1 = atoi(argv[1]); ret = ioctl(fd, IIO_BUFFER_GET_FD_IOCTL, &fd1); if (ret < 0) { fprintf(stderr, "Error for buffer %d ioctl() %d errno %d\n", fd1, ret, errno); close(fd); return -1; } fprintf(stderr, "Got FD %d\n", fd1); close(fd1); close(fd); return 0; } ------------------------------------------------------------------- Results are: ------------------------------------------------------------------- # ./test 0 Using FD 3 Got FD 4 # ./test 1 Using FD 3 Got FD 4 # ./test 2 Using FD 3 Got FD 4 # ./test 3 Using FD 3 Got FD 4 # ls /sys/bus/iio/devices/iio\:device0 buffer buffer0 buffer1 buffer2 buffer3 dev in_voltage_sampling_frequency in_voltage_scale in_voltage_scale_available name of_node power scan_elements subsystem uevent ------------------------------------------------------------------- iio:device0 has some fake kfifo buffers attached to an IIO device. Signed-off-by: Alexandru Ardelean Link: https://lore.kernel.org/r/20210215104043.91251-21-alexandru.ardelean@analog.com Signed-off-by: Jonathan Cameron

iio: add IIO_MOD_O2 modifier

2020-08-22T09:53:12+00:00

Add modifier IIO_MOD_O2 for O2 concentration reporting Signed-off-by: Matt Ranostay Signed-off-by: Jonathan Cameron

iio: Add modifiers for ethanol and H2 gases

2018-12-16T14:05:58+00:00

Add ethanol and H2 gas modifiers: * IIO_MOD_ETHANOL * IIO_MOD_H2 Signed-off-by: Andreas Brauchli Acked-by: Matt Ranostay Signed-off-by: Jonathan Cameron

iio: add IIO_MASSCONCENTRATION channel type

2018-12-16T14:05:57+00:00

Measuring particulate matter in ug / m3 (micro-grams per cubic meter) is de facto standard. Existing air quality sensors usually follow this convention and are capable of returning measurements using this unit. IIO currently does not offer suitable channel type for this type of measurements hence this patch adds this. In addition, extra modifiers are introduced used for distinguishing between fine pm1, pm2p5 and coarse pm4, pm10 particle measurements, i.e IIO_MOD_PM1, IIO_MOD_PM25 and IIO_MOD_PM4, IIO_MOD_PM10. pmX consists of particles with aerodynamic diameter less or equal to X micrometers. Signed-off-by: Tomasz Duszynski Acked-by: Matt Ranostay Signed-off-by: Jonathan Cameron

iio: Add modifier for DUV light

2018-07-23T18:18:10+00:00

Signed-off-by: Maxime Roussin-Bélanger Signed-off-by: Jonathan Cameron

iio: Add channel for Phase

2018-07-21T14:28:14+00:00

Add new channel type support for phase. This channel may be used by Time-of-flight sensors to express the phase difference between emitted and received signals. Those sensor will then use the phase shift of return signals to approximate the distance to objects. Signed-off-by: Mathieu Othacehe Signed-off-by: Jonathan Cameron