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1What: /sys/bus/iio/devices/iio:deviceX/proximity_on_chip_ambient_infrared_suppression2Date: January 20113KernelVersion: 2.6.374Contact: linux-iio@vger.kernel.org5Description:6 From ISL29018 Data Sheet (FN6619.4, Oct 8, 2012) regarding the7 infrared suppression:8 9 Scheme 0, makes full n (4, 8, 12, 16) bits (unsigned) proximity10 detection. The range of Scheme 0 proximity count is from 0 to11 2^n. Logic 1 of this bit, Scheme 1, makes n-1 (3, 7, 11, 15)12 bits (2's complementary) proximity_less_ambient detection. The13 range of Scheme 1 proximity count is from -2^(n-1) to 2^(n-1).14 The sign bit is extended for resolutions less than 16. While15 Scheme 0 has wider dynamic range, Scheme 1 proximity detection16 is less affected by the ambient IR noise variation.17 18 == =============================================19 0 Sensing IR from LED and ambient20 1 Sensing IR from LED with ambient IR rejection21 == =============================================22