Documentation: ABI: testing: add sysfs-bus-iio-temperature-max30210

Add documentation for max30210 additional attributes

Signed-off-by: John Erasmus Mari Geronimo <johnerasmusmari.geronimo@analog.com>

Author: jemfgeronimo

Documentation/ABI/testing/sysfs-bus-iio-temperature-max30210

@@ -0,0 +1,47 @@
+What:		/sys/bus/iio/devices/iio:deviceX/in_temp_roc_en
+KernelVersion:  6.6
+Contact:	linux-iio@vger.kernel.org
+Description:
+                A read-only boolean value that indicates if Rate-of-Change
+                detection is enabled or disabled.
+
+What:		/sys/bus/iio/devices/iio:deviceX/in_temp_roc_filter
+KernelVersion:  6.6
+Contact:	linux-iio@vger.kernel.org
+Description:
+                A write-only value indicating the Rate-of-Change FIR filter
+                settings. This attribute selects the length of the Rate-of-
+                Change FIR filter.
+
+                Operation is not supported if Rate-of-Change detection of device
+                is disabled.
+
+                  * "0"   - 2 samples
+                  * "1"   - 3 samples
+                  * "2"   - 5 samples
+                  * "3"   - 9 samples
+                  * "4"   - 17 samples
+                  * "5"   - 33 samples
+                  * "6"   - 65 samples
+                  * "7"   - 65 samples
+
+What:		/sys/bus/iio/devices/iio:deviceX/in_temp_roc_length
+KernelVersion:  6.6
+Contact:	linux-iio@vger.kernel.org
+Description:
+                A read-only value indicating the number of temperature samples
+                selected in in_temp_roc_filter attribute.
+
+                Operation is not supported if Rate-of-Change detection of device
+                is disabled.
+
+What:		/sys/bus/iio/devices/iio:deviceX/in_temp_roc
+KernelVersion:  6.6
+Contact:	linux-iio@vger.kernel.org
+Description:
+                A read-only value indicating the slope calculated for a set of
+                temperature measurements as programmed in in_temp_roc_filter
+                attribute.
+
+                Operation is not supported if Rate-of-Change detection of device
+                is disabled.