arch/arm/mach-omap2/clock.c

File Facts

System

Linux kernel

Corpus path

arch/arm/mach-omap2/clock.c

Extension

.c

Size

4013 bytes

Lines

140

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/kernel.h
• linux/export.h
• linux/list.h
• linux/errno.h
• linux/err.h
• linux/delay.h
• linux/clk.h
• linux/clk-provider.h
• linux/io.h
• linux/bitops.h
• linux/of_address.h
• asm/cpu.h
• trace/events/power.h
• soc.h
• clockdomain.h
• clock.h
• cm.h
• cm2xxx.h
• cm3xxx.h
• cm-regbits-24xx.h
• cm-regbits-34xx.h
• common.h

Detected Declarations

• function omap2_clk_setup_ll_ops
• function ti_clk_init_features
• function soc_is_omap54xx

Annotated Snippet

soc_is_omap54xx() || soc_is_dra7xx()) {
		features.dpll_bypass_vals |=
			(1 << OMAP4XXX_EN_DPLL_LPBYPASS) |
			(1 << OMAP4XXX_EN_DPLL_FRBYPASS) |
			(1 << OMAP4XXX_EN_DPLL_MNBYPASS);
	}

	/* Jitter correction only available on OMAP343X */
	if (cpu_is_omap343x())
		features.flags |= TI_CLK_DPLL_HAS_FREQSEL;

	if (omap_type() == OMAP2_DEVICE_TYPE_GP)
		features.flags |= TI_CLK_DEVICE_TYPE_GP;

	/* Idlest value for interface clocks.
	 * 24xx uses 0 to indicate not ready, and 1 to indicate ready.
	 * 34xx reverses this, just to keep us on our toes
	 * AM35xx uses both, depending on the module.
	 */
	if (cpu_is_omap24xx())
		features.cm_idlest_val = OMAP24XX_CM_IDLEST_VAL;
	else if (cpu_is_omap34xx())
		features.cm_idlest_val = OMAP34XX_CM_IDLEST_VAL;

	/* On OMAP3430 ES1.0, DPLL4 can't be re-programmed */
	if (omap_rev() == OMAP3430_REV_ES1_0)
		features.flags |= TI_CLK_DPLL4_DENY_REPROGRAM;

	/* Errata I810 for omap5 / dra7 */
	if (soc_is_omap54xx() || soc_is_dra7xx())
		features.flags |= TI_CLK_ERRATA_I810;

	ti_clk_setup_features(&features);
}

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/export.h`, `linux/list.h`, `linux/errno.h`, `linux/err.h`, `linux/delay.h`, `linux/clk.h`, `linux/clk-provider.h`.
• Detected declarations: `function omap2_clk_setup_ll_ops`, `function ti_clk_init_features`, `function soc_is_omap54xx`.
• Atlas domain: Architecture Layer / arch/arm.
• 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.