drivers/clk/sunxi-ng/ccu_sdm.c

File Facts

System

Linux kernel

Corpus path

drivers/clk/sunxi-ng/ccu_sdm.c

Extension

.c

Size

4719 bytes

Lines

162

Domain

Driver Families

Bucket

drivers/clk

Inferred role

Driver Families: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/clk-provider.h
• linux/io.h
• linux/spinlock.h
• ccu_sdm.h

Detected Declarations

• function Copyright
• function ccu_sdm_helper_enable
• function ccu_sdm_helper_disable
• function ccu_sdm_helper_has_rate
• function ccu_sdm_helper_read_rate
• function ccu_sdm_helper_get_factors

Annotated Snippet

if (sdm->table[i].rate == rate) {
			*m = sdm->table[i].m;
			*n = sdm->table[i].n;
			return 0;
		}

	/* nothing found */
	return -EINVAL;
}
EXPORT_SYMBOL_NS_GPL(ccu_sdm_helper_get_factors, "SUNXI_CCU");

Annotation

• Immediate include surface: `linux/clk-provider.h`, `linux/io.h`, `linux/spinlock.h`, `ccu_sdm.h`.
• Detected declarations: `function Copyright`, `function ccu_sdm_helper_enable`, `function ccu_sdm_helper_disable`, `function ccu_sdm_helper_has_rate`, `function ccu_sdm_helper_read_rate`, `function ccu_sdm_helper_get_factors`.
• Atlas domain: Driver Families / drivers/clk.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.