arch/arm/mach-omap1/timer32k.c

File Facts

System

Linux kernel

Corpus path

arch/arm/mach-omap1/timer32k.c

Extension

.c

Size

8438 bytes

Lines

283

Domain

Architecture Layer

Bucket

arch/arm

Inferred role

Architecture Layer: implementation source

Status

source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/kernel.h
• linux/init.h
• linux/delay.h
• linux/interrupt.h
• linux/sched.h
• linux/spinlock.h
• linux/err.h
• linux/clk.h
• linux/clocksource.h
• linux/clockchips.h
• linux/io.h
• linux/sched_clock.h
• asm/irq.h
• asm/mach/irq.h
• asm/mach/time.h
• hardware.h
• common.h

Detected Declarations

• function omap_32k_timer_write
• function omap_32k_timer_start
• function omap_32k_timer_stop
• function omap_32k_timer_set_next_event
• function omap_32k_timer_shutdown
• function omap_32k_timer_set_periodic
• function omap_32k_timer_interrupt
• function omap_init_32k_timer
• function omap_32k_read_sched_clock
• function omap_read_persistent_clock64
• function omap_init_clocksource_32k
• function omap_32k_timer_init

Annotated Snippet

if (!base) {
			pr_err("32k_counter: failed to map base addr\n");
			return -ENODEV;
		}

		sync32k_ick = clk_get(NULL, "omap_32ksync_ick");
		if (!IS_ERR(sync32k_ick))
			clk_prepare_enable(sync32k_ick);

		ret = omap_init_clocksource_32k(base);
	}

	if (!ret)
		omap_init_32k_timer();

	return ret;
}

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/init.h`, `linux/delay.h`, `linux/interrupt.h`, `linux/sched.h`, `linux/spinlock.h`, `linux/err.h`, `linux/clk.h`.
• Detected declarations: `function omap_32k_timer_write`, `function omap_32k_timer_start`, `function omap_32k_timer_stop`, `function omap_32k_timer_set_next_event`, `function omap_32k_timer_shutdown`, `function omap_32k_timer_set_periodic`, `function omap_32k_timer_interrupt`, `function omap_init_32k_timer`, `function omap_32k_read_sched_clock`, `function omap_read_persistent_clock64`.
• Atlas domain: Architecture Layer / arch/arm.
• Implementation status: source implementation candidate.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.