include/linux/spi/ad7877.h

File Facts

System

Linux kernel

Corpus path

include/linux/spi/ad7877.h

Extension

.h

Size

835 bytes

Lines

26

Domain

Core OS

Bucket

Core Kernel Interface

Inferred role

Core OS: implementation source

Status

source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• struct ad7877_platform_data

Annotated Snippet

struct ad7877_platform_data {
	u16	model;			/* 7877 */
	u16	vref_delay_usecs;	/* 0 for external vref; etc */
	u16	x_plate_ohms;
	u16	y_plate_ohms;

	u16	x_min, x_max;
	u16	y_min, y_max;
	u16	pressure_min, pressure_max;

	u8	stopacq_polarity;	/* 1 = Active HIGH, 0 = Active LOW */
	u8	first_conversion_delay;	/* 0 = 0.5us, 1 = 128us, 2 = 1ms, 3 = 8ms */
	u8	acquisition_time;	/* 0 = 2us, 1 = 4us, 2 = 8us, 3 = 16us */
	u8	averaging;		/* 0 = 1, 1 = 4, 2 = 8, 3 = 16 */
	u8	pen_down_acc_interval;	/* 0 = covert once, 1 = every 0.5 ms,
					   2 = ever 1 ms,   3 = every 8 ms,*/
};

Annotation

• Detected declarations: `struct ad7877_platform_data`.
• Atlas domain: Core OS / Core Kernel Interface.
• Implementation status: source implementation candidate.

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.