include/linux/pinctrl/machine.h

Source file repositories/reference/linux-study-clean/include/linux/pinctrl/machine.h

File Facts

System
Linux kernel
Corpus path
include/linux/pinctrl/machine.h
Extension
.h
Size
5581 bytes
Lines
188
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 pinctrl_map_mux {
	const char *group;
	const char *function;
};

/**
 * struct pinctrl_map_configs - mapping table content for MAP_TYPE_CONFIGS_*
 * @group_or_pin: the name of the pin or group whose configuration parameters
 *	are to be configured.
 * @configs: a pointer to an array of config parameters/values to program into
 *	hardware. Each individual pin controller defines the format and meaning
 *	of config parameters.
 * @num_configs: the number of entries in array @configs
 */
struct pinctrl_map_configs {
	const char *group_or_pin;
	unsigned long *configs;
	unsigned int num_configs;
};

/**
 * struct pinctrl_map - boards/machines shall provide this map for devices
 * @dev_name: the name of the device using this specific mapping, the name
 *	must be the same as in your struct device*. If this name is set to the
 *	same name as the pin controllers own dev_name(), the map entry will be
 *	hogged by the driver itself upon registration
 * @name: the name of this specific map entry for the particular machine.
 *	This is the parameter passed to pinmux_lookup_state()
 * @type: the type of mapping table entry
 * @ctrl_dev_name: the name of the device controlling this specific mapping,
 *	the name must be the same as in your struct device*. This field is not
 *	used for PIN_MAP_TYPE_DUMMY_STATE
 * @data: Data specific to the mapping type
 */
struct pinctrl_map {
	const char *dev_name;
	const char *name;
	enum pinctrl_map_type type;
	const char *ctrl_dev_name;
	union {
		struct pinctrl_map_mux mux;
		struct pinctrl_map_configs configs;
	} data;
};

/* Convenience macros to create mapping table entries */

#define PIN_MAP_DUMMY_STATE(dev, state) \
	{								\
		.dev_name = dev,					\
		.name = state,						\
		.type = PIN_MAP_TYPE_DUMMY_STATE,			\
	}

#define PIN_MAP_MUX_GROUP(dev, state, pinctrl, grp, func)		\
	{								\
		.dev_name = dev,					\
		.name = state,						\
		.type = PIN_MAP_TYPE_MUX_GROUP,				\
		.ctrl_dev_name = pinctrl,				\
		.data.mux = {						\
			.group = grp,					\
			.function = func,				\
		},							\
	}

#define PIN_MAP_MUX_GROUP_DEFAULT(dev, pinctrl, grp, func)		\
	PIN_MAP_MUX_GROUP(dev, PINCTRL_STATE_DEFAULT, pinctrl, grp, func)

#define PIN_MAP_MUX_GROUP_HOG(dev, state, grp, func)			\
	PIN_MAP_MUX_GROUP(dev, state, dev, grp, func)

#define PIN_MAP_MUX_GROUP_HOG_DEFAULT(dev, grp, func)			\
	PIN_MAP_MUX_GROUP(dev, PINCTRL_STATE_DEFAULT, dev, grp, func)

#define PIN_MAP_CONFIGS_PIN(dev, state, pinctrl, pin, cfgs)		\
	{								\
		.dev_name = dev,					\
		.name = state,						\
		.type = PIN_MAP_TYPE_CONFIGS_PIN,			\
		.ctrl_dev_name = pinctrl,				\
		.data.configs = {					\
			.group_or_pin = pin,				\
			.configs = cfgs,				\
			.num_configs = ARRAY_SIZE(cfgs),		\
		},							\
	}

#define PIN_MAP_CONFIGS_PIN_DEFAULT(dev, pinctrl, pin, cfgs)		\
	PIN_MAP_CONFIGS_PIN(dev, PINCTRL_STATE_DEFAULT, pinctrl, pin, cfgs)

Annotation

Implementation Notes