Documentation/ABI/testing/sysfs-bus-iio-light-isl29018
Source file repositories/reference/linux-study-clean/Documentation/ABI/testing/sysfs-bus-iio-light-isl29018
File Facts
- System
- Linux kernel
- Corpus path
Documentation/ABI/testing/sysfs-bus-iio-light-isl29018- Extension
[no extension]- Size
- 963 bytes
- Lines
- 22
- Domain
- Support Tooling And Documentation
- Bucket
- Documentation
- Inferred role
- Support Tooling And Documentation: Documentation
- Status
- atlas-only
Why This File Exists
Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
Dependency Surface
- No C-style include directives detected by the generator.
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
What: /sys/bus/iio/devices/iio:deviceX/proximity_on_chip_ambient_infrared_suppression
Date: January 2011
KernelVersion: 2.6.37
Contact: linux-iio@vger.kernel.org
Description:
From ISL29018 Data Sheet (FN6619.4, Oct 8, 2012) regarding the
infrared suppression:
Scheme 0, makes full n (4, 8, 12, 16) bits (unsigned) proximity
detection. The range of Scheme 0 proximity count is from 0 to
2^n. Logic 1 of this bit, Scheme 1, makes n-1 (3, 7, 11, 15)
bits (2's complementary) proximity_less_ambient detection. The
range of Scheme 1 proximity count is from -2^(n-1) to 2^(n-1).
The sign bit is extended for resolutions less than 16. While
Scheme 0 has wider dynamic range, Scheme 1 proximity detection
is less affected by the ambient IR noise variation.
== =============================================
0 Sensing IR from LED and ambient
1 Sensing IR from LED with ambient IR rejection
== =============================================Annotation
- Atlas domain: Support Tooling And Documentation / Documentation.
- Implementation status: atlas-only.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.