include/linux/mfd/axp20x.h

File Facts

System

Linux kernel

Corpus path

include/linux/mfd/axp20x.h

Extension

.h

Size

25795 bytes

Lines

1029

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

• linux/regmap.h

Detected Declarations

• struct axp20x_dev
• enum axp20x_variants
• enum axp192_irqs
• enum axp22x_irqs
• enum axp288_irqs
• enum axp313a_irqs
• enum axp717_irqs
• enum axp803_irqs
• enum axp806_irqs
• enum axp809_irqs
• enum axp15060_irqs
• function axp20x_read_variable_width

Annotated Snippet

struct axp20x_dev {
	struct device			*dev;
	int				irq;
	unsigned long			irq_flags;
	struct regmap			*regmap;
	struct regmap_irq_chip_data	*regmap_irqc;
	enum axp20x_variants		variant;
	int                             nr_cells;
	const struct mfd_cell           *cells;
	const struct regmap_config	*regmap_cfg;
	const struct regmap_irq_chip	*regmap_irq_chip;
};

/* generic helper function for reading 9-16 bit wide regs */
static inline int axp20x_read_variable_width(struct regmap *regmap,
	unsigned int reg, unsigned int width)
{
	unsigned int reg_val, result;
	int err;

	err = regmap_read(regmap, reg, &reg_val);
	if (err)
		return err;

	result = reg_val << (width - 8);

	err = regmap_read(regmap, reg + 1, &reg_val);
	if (err)
		return err;

	result |= reg_val;

	return result;
}

/**
 * axp20x_match_device(): Setup axp20x variant related fields
 *
 * @axp20x: axp20x device to setup (.dev field must be set)
 * @dev: device associated with this axp20x device
 *
 * This lets the axp20x core configure the mfd cells and register maps
 * for later use.
 */
int axp20x_match_device(struct axp20x_dev *axp20x);

/**
 * axp20x_device_probe(): Probe a configured axp20x device
 *
 * @axp20x: axp20x device to probe (must be configured)
 *
 * This function lets the axp20x core register the axp20x mfd devices
 * and irqchip. The axp20x device passed in must be fully configured
 * with axp20x_match_device, its irq set, and regmap created.
 */
int axp20x_device_probe(struct axp20x_dev *axp20x);

/**
 * axp20x_device_remove(): Remove a axp20x device
 *
 * @axp20x: axp20x device to remove
 *
 * This tells the axp20x core to remove the associated mfd devices
 */
void axp20x_device_remove(struct axp20x_dev *axp20x);

#endif /* __LINUX_MFD_AXP20X_H */

Annotation

• Immediate include surface: `linux/regmap.h`.
• Detected declarations: `struct axp20x_dev`, `enum axp20x_variants`, `enum axp192_irqs`, `enum axp22x_irqs`, `enum axp288_irqs`, `enum axp313a_irqs`, `enum axp717_irqs`, `enum axp803_irqs`, `enum axp806_irqs`, `enum axp809_irqs`.
• 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.