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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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#ifndef _LINUX_MUX_DRIVER_H#define _LINUX_MUX_DRIVER_H
#include <dt-bindings/mux/mux.h>#include <linux/device.h>#include <linux/ktime.h>#include <linux/semaphore.h>
struct mux_chip;struct mux_control;
/** * struct mux_control_ops - Mux controller operations for a mux chip. * @set: Set the state of the given mux controller. */struct mux_control_ops { int (*set)(struct mux_control *mux, int state);};
/** * struct mux_control - Represents a mux controller. * @lock: Protects the mux controller state. * @chip: The mux chip that is handling this mux controller. * @cached_state: The current mux controller state, or -1 if none. * @states: The number of mux controller states. * @idle_state: The mux controller state to use when inactive, or one * of MUX_IDLE_AS_IS and MUX_IDLE_DISCONNECT. * @last_change: Timestamp of last change * * Mux drivers may only change @states and @idle_state, and may only do so * between allocation and registration of the mux controller. Specifically, * @cached_state is internal to the mux core and should never be written by * mux drivers. */struct mux_control { struct semaphore lock; /* protects the state of the mux */
struct mux_chip *chip; int cached_state;
unsigned int states; int idle_state;
ktime_t last_change;};
/** * struct mux_chip - Represents a chip holding mux controllers. * @controllers: Number of mux controllers handled by the chip. * @dev: Device structure. * @id: Used to identify the device internally. * @ops: Mux controller operations. * @mux: Array of mux controllers that are handled. */struct mux_chip { unsigned int controllers; struct device dev; int id;
const struct mux_control_ops *ops; struct mux_control mux[] __counted_by(controllers);};
#define to_mux_chip(x) container_of((x), struct mux_chip, dev)
/** * mux_chip_priv() - Get the extra memory reserved by mux_chip_alloc(). * @mux_chip: The mux-chip to get the private memory from. * * Return: Pointer to the private memory reserved by the allocator. */static inline void *mux_chip_priv(struct mux_chip *mux_chip){ return &mux_chip->mux[mux_chip->controllers];}
struct mux_chip *mux_chip_alloc(struct device *dev, unsigned int controllers, size_t sizeof_priv);int mux_chip_register(struct mux_chip *mux_chip);void mux_chip_unregister(struct mux_chip *mux_chip);void mux_chip_free(struct mux_chip *mux_chip);
struct mux_chip *devm_mux_chip_alloc(struct device *dev, unsigned int controllers, size_t sizeof_priv);int devm_mux_chip_register(struct device *dev, struct mux_chip *mux_chip);
/** * mux_control_get_index() - Get the index of the given mux controller * @mux: The mux-control to get the index for. * * Return: The index of the mux controller within the mux chip the mux * controller is a part of. */static inline unsigned int mux_control_get_index(struct mux_control *mux){ return mux - mux->chip->mux;}
#endif /* _LINUX_MUX_DRIVER_H */