Here's the relevant output of the iio_info command from the libiio project that shows what values are available upstream from the various i2c sensors.
iio:device0: apds9930
4 channels found:
illuminance0: (input)
4 channel-specific attributes found:
attr 0: calibrate ERROR: Permission denied (-13)
attr 1: input value: 38
attr 2: lux_table value: 52000,96824,38792,67132,0,0
attr 3: target_input value: 150
intensity0: (input)
6 channel-specific attributes found:
attr 0: calibbias value: 1000
attr 1: calibscale value: 1
attr 2: calibscale_available value: 1 8 16 120
attr 3: integration_time value: 0.002730
attr 4: integration_time_available value:
[0.002730 0.002730 0.699000]
attr 5: raw value: 2
proximity0: (input)
4 channel-specific attributes found:
attr 0: calibrate ERROR: Permission denied (-13)
attr 1: calibscale value: 1
attr 2: calibscale_available value: 1 2 4 8
attr 3: raw value: 10
intensity1: (input)
1 channel-specific attributes found:
attr 0: raw value: 0
iio:device1: mpu6515 (buffer capable)
9 channels found:
accel_x: (input, index: 0, format: be:S16/16>>0)
6 channel-specific attributes found:
attr 0: calibbias value: -3854
attr 1: matrix value: 0, 0, 0; 0, 0, 0; 0, 0, 0
attr 2: mount_matrix value: 1, 0, 0; 0, 1, 0; 0, 0, 1
attr 3: raw value: -858
attr 4: scale value: 0.000598
attr 5: scale_available value:
0.000598 0.001196 0.002392 0.004785
accel_y: (input, index: 1, format: be:S16/16>>0)
6 channel-specific attributes found:
attr 0: calibbias value: 17
attr 1: matrix value: 0, 0, 0; 0, 0, 0; 0, 0, 0
attr 2: mount_matrix value: 1, 0, 0; 0, 1, 0; 0, 0, 1
attr 3: raw value: 452
attr 4: scale value: 0.000598
attr 5: scale_available value:
0.000598 0.001196 0.002392 0.004785
accel_z: (input, index: 2, format: be:S16/16>>0)
6 channel-specific attributes found:
attr 0: calibbias value: 10752
attr 1: matrix value: 0, 0, 0; 0, 0, 0; 0, 0, 0
attr 2: mount_matrix value: 1, 0, 0; 0, 1, 0; 0, 0, 1
attr 3: raw value: -15791
attr 4: scale value: 0.000598
attr 5: scale_available value:
0.000598 0.001196 0.002392 0.004785
anglvel_x: (input, index: 3, format: be:S16/16>>0)
5 channel-specific attributes found:
attr 0: calibbias value: 0
attr 1: mount_matrix value: 1, 0, 0; 0, 1, 0; 0, 0, 1
attr 2: raw value: 45
attr 3: scale value: 0.001064724
attr 4: scale_available value:
0.000133090 0.000266181 0.000532362 0.001064724
anglvel_y: (input, index: 4, format: be:S16/16>>0)
5 channel-specific attributes found:
attr 0: calibbias value: 0
attr 1: mount_matrix value: 1, 0, 0; 0, 1, 0; 0, 0, 1
attr 2: raw value: -24
attr 3: scale value: 0.001064724
attr 4: scale_available value:
0.000133090 0.000266181 0.000532362 0.001064724
anglvel_z: (input, index: 5, format: be:S16/16>>0)
5 channel-specific attributes found:
attr 0: calibbias value: 0
attr 1: mount_matrix value: 1, 0, 0; 0, 1, 0; 0, 0, 1
attr 2: raw value: -13
attr 3: scale value: 0.001064724
attr 4: scale_available value:
0.000133090 0.000266181 0.000532362 0.001064724
timestamp: (input, index: 6, format: le:S64/64>>0)
temp: (input)
3 channel-specific attributes found:
attr 0: offset value: 7011
attr 1: raw value: 4095
attr 2: scale value: 2.995178
gyro: (input)
1 channel-specific attributes found:
attr 0: matrix value: 0, 0, 0; 0, 0, 0; 0, 0, 0
3 device-specific attributes found:
attr 0: current_timestamp_clock value: realtime
attr 1: sampling_frequency value: 50
attr 2: sampling_frequency_available value: 10 20 50 100 200 500
2 buffer-specific attributes found:
attr 0: data_available value: 0
attr 1: watermark value: 1
Current trigger: trigger0(mpu6515-dev1)
iio:device2: fc4cf000.spmi:pm8941@0:iadc@3600
2 channels found:
current1: (input)
2 channel-specific attributes found:
attr 0: raw value: 36
attr 1: scale value: 0.001000
current0: (input)
2 channel-specific attributes found:
attr 0: raw value: 37
attr 1: scale value: 0.001000
iio:device3: ak8963 (buffer capable)
5 channels found:
magn_x: (input, index: 0, format: le:S16/16>>0)
2 channel-specific attributes found:
attr 0: raw value: 89
attr 1: scale value: 0.006773
magn_y: (input, index: 1, format: le:S16/16>>0)
2 channel-specific attributes found:
attr 0: raw value: -1
attr 1: scale value: 0.006796
magn_z: (input, index: 2, format: le:S16/16>>0)
2 channel-specific attributes found:
attr 0: raw value: -492
attr 1: scale value: 0.006609
timestamp: (input, index: 3, format: le:S64/64>>0)
mount: (input)
1 channel-specific attributes found:
attr 0: matrix value: 1, 0, 0; 0, 1, 0; 0, 0, 1
1 device-specific attributes found:
attr 0: current_timestamp_clock value: realtime
2 buffer-specific attributes found:
attr 0: data_available value: 0
attr 1: watermark value: 1
iio:device4: fc4cf000.spmi:pm8941@0:vadc@3100
7 channels found:
voltage6: (input)
1 channel-specific attributes found:
attr 0: raw value: 39277
voltage10: (input)
2 channel-specific attributes found:
attr 0: input value: 1249902
attr 1: raw value: 37545
voltage14: (input)
2 channel-specific attributes found:
attr 0: input value: 0
attr 1: raw value: 24696
voltage15: (input)
2 channel-specific attributes found:
attr 0: input value: 1782317
attr 1: raw value: 43008
temp8: (input)
2 channel-specific attributes found:
attr 0: input value: 33551
attr 1: raw value: 31014
voltage9: (input)
2 channel-specific attributes found:
attr 0: input value: 624611
attr 1: raw value: 31128
voltage48: (input)
1 channel-specific attributes found:
attr 0: raw value: 32148
iio:device5: bmp280
2 channels found:
temp: (input)
3 channel-specific attributes found:
attr 0: input value: 33590
attr 1: oversampling_ratio value: 2
attr 2: oversampling_ratio_available value: 1 2 4 8 16
pressure: (input)
3 channel-specific attributes found:
attr 0: input value: 96.978394531
attr 1: oversampling_ratio value: 16
attr 2: oversampling_ratio_available value: 1 2 4 8 16