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| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-iio-health-afe440x | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio-health-afe440x b/Documentation/ABI/testing/sysfs-bus-iio-health-afe440x new file mode 100644 index 0000000000..a8e04b41d9 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-iio-health-afe440x @@ -0,0 +1,39 @@ +What: /sys/bus/iio/devices/iio:deviceX/in_intensityY_raw +Date: May 2016 +KernelVersion: +Contact: Andrew F. Davis <afd@ti.com> +Description: + Get measured values from the ADC for these stages. Y is the + specific stage number corresponding to datasheet stage names + as follows: + + == ========== + 1 LED2 + 2 ALED2/LED3 + 3 LED1 + 4 ALED1/LED4 + == ========== + + Note that channels 5 and 6 represent LED2-ALED2 and LED1-ALED1 + respectively which simply helper channels containing the + calculated difference in the value of stage 1 - 2 and 3 - 4. + The values are expressed in 24-bit twos complement. + The LED current for the stage is controlled via + out_currentY_raw. + +What: /sys/bus/iio/devices/iio:deviceX/in_intensityY_offset +Date: May 2016 +KernelVersion: +Contact: Andrew F. Davis <afd@ti.com> +Description: + Get and set the offset cancellation DAC setting for these + stages. The values are expressed in 5-bit sign-magnitude. + +What: /sys/bus/iio/devices/iio:deviceX/in_intensityY_resistance +What: /sys/bus/iio/devices/iio:deviceX/in_intensityY_capacitance +Date: May 2016 +KernelVersion: +Contact: Andrew F. Davis <afd@ti.com> +Description: + Get and set the resistance and the capacitance settings for the + Transimpedance Amplifier during the associated stage. |