include/linux/mfd/core.h

Source file repositories/reference/linux-study-clean/include/linux/mfd/core.h

File Facts

System
Linux kernel
Corpus path
include/linux/mfd/core.h
Extension
.h
Size
4305 bytes
Lines
152
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.

Dependency Surface

Detected Declarations

Annotated Snippet

struct mfd_cell_acpi_match {
	const char			*pnpid;
	const unsigned long long	adr;
};

/*
 * This struct describes the MFD part ("cell").
 * After registration the copy of this structure will become the platform data
 * of the resulting platform_device
 */
struct mfd_cell {
	const char		*name;
	int			id;
	int			level;

	int			(*suspend)(struct platform_device *dev);
	int			(*resume)(struct platform_device *dev);

	/* platform data passed to the sub devices drivers */
	const void		*platform_data;
	size_t			pdata_size;

	/* Matches ACPI */
	const struct mfd_cell_acpi_match	*acpi_match;

	/* Software node for the device. */
	const struct software_node *swnode;

	/*
	 * Device Tree compatible string
	 * See: Documentation/devicetree/usage-model.rst Chapter 2.2 for details
	 */
	const char		*of_compatible;

	/*
	 * Address as defined in Device Tree.  Used to complement 'of_compatible'
	 * (above) when matching OF nodes with devices that have identical
	 * compatible strings
	 */
	u64 of_reg;

	/* Set to 'true' to use 'of_reg' (above) - allows for of_reg=0 */
	bool use_of_reg;

	/*
	 * These resources can be specified relative to the parent device.
	 * For accessing hardware you should use resources from the platform dev
	 */
	int			num_resources;
	const struct resource	*resources;

	/* don't check for resource conflicts */
	bool			ignore_resource_conflicts;

	/*
	 * Disable runtime PM callbacks for this subdevice - see
	 * pm_runtime_no_callbacks().
	 */
	bool			pm_runtime_no_callbacks;

	/* A list of regulator supplies that should be mapped to the MFD
	 * device rather than the child device when requested
	 */
	int			num_parent_supplies;
	const char * const	*parent_supplies;
};

/*
 * Given a platform device that's been created by mfd_add_devices(), fetch
 * the mfd_cell that created it.
 */
static inline const struct mfd_cell *mfd_get_cell(struct platform_device *pdev)
{
	return pdev->mfd_cell;
}

extern int mfd_add_devices(struct device *parent, int id,
			   const struct mfd_cell *cells, int n_devs,
			   struct resource *mem_base,
			   int irq_base, struct irq_domain *irq_domain);

static inline int mfd_add_hotplug_devices(struct device *parent,
		const struct mfd_cell *cells, int n_devs)
{
	return mfd_add_devices(parent, PLATFORM_DEVID_AUTO, cells, n_devs,
			NULL, 0, NULL);
}

extern void mfd_remove_devices(struct device *parent);
extern void mfd_remove_devices_late(struct device *parent);

Annotation

Implementation Notes