EVOLUTION-MANAGER

Edit File: pinctrl.h

/* * Interface the pinctrl subsystem * * Copyright (C) 2011 ST-Ericsson SA * Written on behalf of Linaro for ST-Ericsson * This interface is used in the core to keep track of pins. * * Author: Linus Walleij <linus.walleij@linaro.org> * * License terms: GNU General Public License (GPL) version 2 */ #ifndef __LINUX_PINCTRL_PINCTRL_H #define __LINUX_PINCTRL_PINCTRL_H #ifdef CONFIG_PINCTRL #include <linux/radix-tree.h> #include <linux/list.h> #include <linux/seq_file.h> #include <linux/pinctrl/pinctrl-state.h> struct device; struct pinctrl_dev; struct pinctrl_map; struct pinmux_ops; struct pinconf_ops; struct gpio_chip; struct device_node; /** * struct pinctrl_pin_desc - boards/machines provide information on their * pins, pads or other muxable units in this struct * @number: unique pin number from the global pin number space * @name: a name for this pin */ struct pinctrl_pin_desc { unsigned number; const char *name; }; /* Convenience macro to define a single named or anonymous pin descriptor */ #define PINCTRL_PIN(a, b) { .number = a, .name = b } #define PINCTRL_PIN_ANON(a) { .number = a } /** * struct pinctrl_gpio_range - each pin controller can provide subranges of * the GPIO number space to be handled by the controller * @node: list node for internal use * @name: a name for the chip in this range * @id: an ID number for the chip in this range * @base: base offset of the GPIO range * @pin_base: base pin number of the GPIO range if pins != NULL * @pins: enumeration of pins in GPIO range or NULL * @npins: number of pins in the GPIO range, including the base number * @gc: an optional pointer to a gpio_chip */ struct pinctrl_gpio_range { struct list_head node; const char *name; unsigned int id; unsigned int base; unsigned int pin_base; unsigned const *pins; unsigned int npins; struct gpio_chip *gc; }; /** * struct pinctrl_ops - global pin control operations, to be implemented by * pin controller drivers. * @get_groups_count: Returns the count of total number of groups registered. * @get_group_name: return the group name of the pin group * @get_group_pins: return an array of pins corresponding to a certain * group selector @pins, and the size of the array in @num_pins * @pin_dbg_show: optional debugfs display hook that will provide per-device * info for a certain pin in debugfs * @dt_node_to_map: parse a device tree "pin configuration node", and create * mapping table entries for it. These are returned through the @map and * @num_maps output parameters. This function is optional, and may be * omitted for pinctrl drivers that do not support device tree. * @dt_free_map: free mapping table entries created via @dt_node_to_map. The * top-level @map pointer must be freed, along with any dynamically * allocated members of the mapping table entries themselves. This * function is optional, and may be omitted for pinctrl drivers that do * not support device tree. */ struct pinctrl_ops { int (*get_groups_count) (struct pinctrl_dev *pctldev); const char *(*get_group_name) (struct pinctrl_dev *pctldev, unsigned selector); int (*get_group_pins) (struct pinctrl_dev *pctldev, unsigned selector, const unsigned **pins, unsigned *num_pins); void (*pin_dbg_show) (struct pinctrl_dev *pctldev, struct seq_file *s, unsigned offset); int (*dt_node_to_map) (struct pinctrl_dev *pctldev, struct device_node *np_config, struct pinctrl_map **map, unsigned *num_maps); void (*dt_free_map) (struct pinctrl_dev *pctldev, struct pinctrl_map *map, unsigned num_maps); }; /** * struct pinctrl_desc - pin controller descriptor, register this to pin * control subsystem * @name: name for the pin controller * @pins: an array of pin descriptors describing all the pins handled by * this pin controller * @npins: number of descriptors in the array, usually just ARRAY_SIZE() * of the pins field above * @pctlops: pin control operation vtable, to support global concepts like * grouping of pins, this is optional. * @pmxops: pinmux operations vtable, if you support pinmuxing in your driver * @confops: pin config operations vtable, if you support pin configuration in * your driver * @owner: module providing the pin controller, used for refcounting */ struct pinctrl_desc { const char *name; struct pinctrl_pin_desc const *pins; unsigned int npins; const struct pinctrl_ops *pctlops; const struct pinmux_ops *pmxops; const struct pinconf_ops *confops; struct module *owner; }; /* External interface to pin controller */ extern struct pinctrl_dev *pinctrl_register(struct pinctrl_desc *pctldesc, struct device *dev, void *driver_data); extern void pinctrl_unregister(struct pinctrl_dev *pctldev); extern struct pinctrl_dev *devm_pinctrl_register(struct device *dev, struct pinctrl_desc *pctldesc, void *driver_data); extern void devm_pinctrl_unregister(struct device *dev, struct pinctrl_dev *pctldev); extern bool pin_is_valid(struct pinctrl_dev *pctldev, int pin); extern void pinctrl_add_gpio_range(struct pinctrl_dev *pctldev, struct pinctrl_gpio_range *range); extern void pinctrl_add_gpio_ranges(struct pinctrl_dev *pctldev, struct pinctrl_gpio_range *ranges, unsigned nranges); extern void pinctrl_remove_gpio_range(struct pinctrl_dev *pctldev, struct pinctrl_gpio_range *range); extern struct pinctrl_dev *pinctrl_find_and_add_gpio_range(const char *devname, struct pinctrl_gpio_range *range); extern struct pinctrl_gpio_range * pinctrl_find_gpio_range_from_pin(struct pinctrl_dev *pctldev, unsigned int pin); extern int pinctrl_get_group_pins(struct pinctrl_dev *pctldev, const char *pin_group, const unsigned **pins, unsigned *num_pins); #ifdef CONFIG_OF extern struct pinctrl_dev *of_pinctrl_get(struct device_node *np); #else static inline struct pinctrl_dev *of_pinctrl_get(struct device_node *np) { return NULL; } #endif /* CONFIG_OF */ extern const char *pinctrl_dev_get_name(struct pinctrl_dev *pctldev); extern const char *pinctrl_dev_get_devname(struct pinctrl_dev *pctldev); extern void *pinctrl_dev_get_drvdata(struct pinctrl_dev *pctldev); #else struct pinctrl_dev; /* Sufficiently stupid default functions when pinctrl is not in use */ static inline bool pin_is_valid(struct pinctrl_dev *pctldev, int pin) { return pin >= 0; } #endif /* !CONFIG_PINCTRL */ #endif /* __LINUX_PINCTRL_PINCTRL_H */