Documentation/iio/ep93xx_adc.rst

Source file repositories/reference/linux-study-clean/Documentation/iio/ep93xx_adc.rst

File Facts

System: Linux kernel
Corpus path: Documentation/iio/ep93xx_adc.rst
Extension: .rst
Size: 1397 bytes
Lines: 41
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

==============================
Cirrus Logic EP93xx ADC driver
==============================

1. Overview
===========

The driver is intended to work on both low-end (EP9301, EP9302) devices with
5-channel ADC and high-end (EP9307, EP9312, EP9315) devices with 10-channel
touchscreen/ADC module.

2. Channel numbering
====================

Numbering scheme for channels 0..4 is defined in EP9301 and EP9302 datasheets.
EP9307, EP9312 and EP9315 have 3 channels more (total 8), but the numbering is
not defined. So the last three are numbered randomly, let's say.

Assuming ep93xx_adc is IIO device0, you'd find the following entries under
/sys/bus/iio/devices/iio:device0/:

  +-----------------+---------------+
  | sysfs entry     | ball/pin name |
  +=================+===============+
  | in_voltage0_raw | YM            |
  +-----------------+---------------+
  | in_voltage1_raw | SXP           |
  +-----------------+---------------+
  | in_voltage2_raw | SXM           |
  +-----------------+---------------+
  | in_voltage3_raw | SYP           |
  +-----------------+---------------+
  | in_voltage4_raw | SYM           |
  +-----------------+---------------+
  | in_voltage5_raw | XP            |
  +-----------------+---------------+
  | in_voltage6_raw | XM            |
  +-----------------+---------------+
  | in_voltage7_raw | YP            |
  +-----------------+---------------+

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.