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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#include <linux/bits.h>#include <linux/cleanup.h>#include <linux/err.h>#include <linux/irqchip/chained_irq.h>#include <linux/irqdomain.h>#include <linux/irqhandler.h>#include <linux/lockdep.h>#include <linux/pinctrl/pinconf-generic.h>#include <linux/pinctrl/pinctrl.h>#include <linux/property.h>#include <linux/spinlock_types.h>#include <linux/types.h>#include <linux/util_macros.h>
#ifdef CONFIG_GENERIC_MSI_IRQ#include <asm/msi.h>#endif
#include "defs.h"
struct device;struct irq_chip;struct irq_data;struct module;struct of_phandle_args;struct pinctrl_dev;struct seq_file;
struct gpio_chip;struct gpio_desc;struct gpio_device;
enum gpio_lookup_flags;enum gpiod_flags;
union gpio_irq_fwspec { struct irq_fwspec fwspec;#ifdef CONFIG_GENERIC_MSI_IRQ msi_alloc_info_t msiinfo;#endif};
/** * struct gpio_irq_chip - GPIO interrupt controller */struct gpio_irq_chip { /** * @chip: * * GPIO IRQ chip implementation, provided by GPIO driver. */ struct irq_chip *chip;
/** * @domain: * * Interrupt translation domain; responsible for mapping between GPIO * hwirq number and Linux IRQ number. */ struct irq_domain *domain;
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY /** * @fwnode: * * Firmware node corresponding to this gpiochip/irqchip, necessary * for hierarchical irqdomain support. */ struct fwnode_handle *fwnode;
/** * @parent_domain: * * If non-NULL, will be set as the parent of this GPIO interrupt * controller's IRQ domain to establish a hierarchical interrupt * domain. The presence of this will activate the hierarchical * interrupt support. */ struct irq_domain *parent_domain;
/** * @child_to_parent_hwirq: * * This callback translates a child hardware IRQ offset to a parent * hardware IRQ offset on a hierarchical interrupt chip. The child * hardware IRQs correspond to the GPIO index 0..ngpio-1 (see the * ngpio field of struct gpio_chip) and the corresponding parent * hardware IRQ and type (such as IRQ_TYPE_*) shall be returned by * the driver. The driver can calculate this from an offset or using * a lookup table or whatever method is best for this chip. Return * 0 on successful translation in the driver. * * If some ranges of hardware IRQs do not have a corresponding parent * HWIRQ, return -EINVAL, but also make sure to fill in @valid_mask and * @need_valid_mask to make these GPIO lines unavailable for * translation. */ int (*child_to_parent_hwirq)(struct gpio_chip *gc, unsigned int child_hwirq, unsigned int child_type, unsigned int *parent_hwirq, unsigned int *parent_type);
/** * @populate_parent_alloc_arg : * * This optional callback allocates and populates the specific struct * for the parent's IRQ domain. If this is not specified, then * &gpiochip_populate_parent_fwspec_twocell will be used. A four-cell * variant named &gpiochip_populate_parent_fwspec_fourcell is also * available. */ int (*populate_parent_alloc_arg)(struct gpio_chip *gc, union gpio_irq_fwspec *fwspec, unsigned int parent_hwirq, unsigned int parent_type);
/** * @child_offset_to_irq: * * This optional callback is used to translate the child's GPIO line * offset on the GPIO chip to an IRQ number for the GPIO to_irq() * callback. If this is not specified, then a default callback will be * provided that returns the line offset. */ unsigned int (*child_offset_to_irq)(struct gpio_chip *gc, unsigned int pin);
/** * @child_irq_domain_ops: * * The IRQ domain operations that will be used for this GPIO IRQ * chip. If no operations are provided, then default callbacks will * be populated to setup the IRQ hierarchy. Some drivers need to * supply their own translate function. */ struct irq_domain_ops child_irq_domain_ops;#endif
/** * @handler: * * The IRQ handler to use (often a predefined IRQ core function) for * GPIO IRQs, provided by GPIO driver. */ irq_flow_handler_t handler;
/** * @default_type: * * Default IRQ triggering type applied during GPIO driver * initialization, provided by GPIO driver. */ unsigned int default_type;
/** * @lock_key: * * Per GPIO IRQ chip lockdep class for IRQ lock. */ struct lock_class_key *lock_key;
/** * @request_key: * * Per GPIO IRQ chip lockdep class for IRQ request. */ struct lock_class_key *request_key;
/** * @parent_handler: * * The interrupt handler for the GPIO chip's parent interrupts, may be * NULL if the parent interrupts are nested rather than cascaded. */ irq_flow_handler_t parent_handler;
union { /** * @parent_handler_data: * * If @per_parent_data is false, @parent_handler_data is a * single pointer used as the data associated with every * parent interrupt. */ void *parent_handler_data;
/** * @parent_handler_data_array: * * If @per_parent_data is true, @parent_handler_data_array is * an array of @num_parents pointers, and is used to associate * different data for each parent. This cannot be NULL if * @per_parent_data is true. */ void **parent_handler_data_array; };
/** * @num_parents: * * The number of interrupt parents of a GPIO chip. */ unsigned int num_parents;
/** * @parents: * * A list of interrupt parents of a GPIO chip. This is owned by the * driver, so the core will only reference this list, not modify it. */ unsigned int *parents;
/** * @map: * * A list of interrupt parents for each line of a GPIO chip. */ unsigned int *map;
/** * @threaded: * * True if set the interrupt handling uses nested threads. */ bool threaded;
/** * @per_parent_data: * * True if parent_handler_data_array describes a @num_parents * sized array to be used as parent data. */ bool per_parent_data;
/** * @initialized: * * Flag to track GPIO chip irq member's initialization. * This flag will make sure GPIO chip irq members are not used * before they are initialized. */ bool initialized;
/** * @domain_is_allocated_externally: * * True it the irq_domain was allocated outside of gpiolib, in which * case gpiolib won't free the irq_domain itself. */ bool domain_is_allocated_externally;
/** * @init_hw: optional routine to initialize hardware before * an IRQ chip will be added. This is quite useful when * a particular driver wants to clear IRQ related registers * in order to avoid undesired events. */ int (*init_hw)(struct gpio_chip *gc);
/** * @init_valid_mask: optional routine to initialize @valid_mask, to be * used if not all GPIO lines are valid interrupts. Sometimes some * lines just cannot fire interrupts, and this routine, when defined, * is passed a bitmap in "valid_mask" and it will have ngpios * bits from 0..(ngpios-1) set to "1" as in valid. The callback can * then directly set some bits to "0" if they cannot be used for * interrupts. */ void (*init_valid_mask)(struct gpio_chip *gc, unsigned long *valid_mask, unsigned int ngpios);
/** * @valid_mask: * * If not %NULL, holds bitmask of GPIOs which are valid to be included * in IRQ domain of the chip. */ unsigned long *valid_mask;
/** * @first: * * Required for static IRQ allocation. If set, * irq_domain_create_simple() will allocate and map all IRQs * during initialization. */ unsigned int first;
/** * @irq_enable: * * Store old irq_chip irq_enable callback */ void (*irq_enable)(struct irq_data *data);
/** * @irq_disable: * * Store old irq_chip irq_disable callback */ void (*irq_disable)(struct irq_data *data); /** * @irq_unmask: * * Store old irq_chip irq_unmask callback */ void (*irq_unmask)(struct irq_data *data);
/** * @irq_mask: * * Store old irq_chip irq_mask callback */ void (*irq_mask)(struct irq_data *data);};
/** * struct gpio_chip - abstract a GPIO controller * @label: a functional name for the GPIO device, such as a part * number or the name of the SoC IP-block implementing it. * @gpiodev: the internal state holder, opaque struct * @parent: optional parent device providing the GPIOs * @fwnode: optional fwnode providing this controller's properties * @owner: helps prevent removal of modules exporting active GPIOs * @request: optional hook for chip-specific activation, such as * enabling module power and clock; may sleep; must return 0 on success * or negative error number on failure * @free: optional hook for chip-specific deactivation, such as * disabling module power and clock; may sleep * @get_direction: returns direction for signal "offset", 0=out, 1=in, * (same as GPIO_LINE_DIRECTION_OUT / GPIO_LINE_DIRECTION_IN), * or negative error. It is recommended to always implement this * function, even on input-only or output-only gpio chips. * @direction_input: configures signal "offset" as input, returns 0 on success * or a negative error number. This can be omitted on input-only or * output-only gpio chips. * @direction_output: configures signal "offset" as output, returns 0 on * success or a negative error number. This can be omitted on input-only * or output-only gpio chips. * @get: returns value for signal "offset", 0=low, 1=high, or negative error. * the low and high values are defined as physical low on the line * in/out to the connector such as a physical pad, pin or rail. The GPIO * library has internal logic to handle lines that are active low, such * as indicated by overstrike or #name in a schematic, and the driver * should not try to second-guess the logic value of a line. * @get_multiple: reads values for multiple signals defined by "mask" and * stores them in "bits", returns 0 on success or negative error * @set: assigns output value for signal "offset", returns 0 on success or * negative error value. The output value follows the same semantic * rules as for @get. * @set_multiple: assigns output values for multiple signals defined by * "mask", returns 0 on success or negative error value * @set_config: optional hook for all kinds of settings. Uses the same * packed config format as generic pinconf. Must return 0 on success and * a negative error number on failure. * @to_irq: optional hook supporting non-static gpiod_to_irq() mappings; * implementation may not sleep * @dbg_show: optional routine to show contents in debugfs; default code * will be used when this is omitted, but custom code can show extra * state (such as pullup/pulldown configuration). * @init_valid_mask: optional routine to initialize @valid_mask, to be used if * not all GPIOs are valid. * @add_pin_ranges: optional routine to initialize pin ranges, to be used when * requires special mapping of the pins that provides GPIO functionality. * It is called after adding GPIO chip and before adding IRQ chip. * @en_hw_timestamp: Dependent on GPIO chip, an optional routine to * enable hardware timestamp. * @dis_hw_timestamp: Dependent on GPIO chip, an optional routine to * disable hardware timestamp. * @base: identifies the first GPIO number handled by this chip; * or, if negative during registration, requests dynamic ID allocation. * DEPRECATION: providing anything non-negative and nailing the base * offset of GPIO chips is deprecated. Please pass -1 as base to * let gpiolib select the chip base in all possible cases. We want to * get rid of the static GPIO number space in the long run. * @ngpio: the number of GPIOs handled by this controller; the last GPIO * handled is (base + ngpio - 1). * @offset: when multiple gpio chips belong to the same device this * can be used as offset within the device so friendly names can * be properly assigned. * @names: if set, must be an array of strings to use as alternative * names for the GPIOs in this chip. Any entry in the array * may be NULL if there is no alias for the GPIO, however the * array must be @ngpio entries long. * @can_sleep: flag must be set iff get()/set() methods sleep, as they * must while accessing GPIO expander chips over I2C or SPI. This * implies that if the chip supports IRQs, these IRQs need to be threaded * as the chip access may sleep when e.g. reading out the IRQ status * registers. * * A gpio_chip can help platforms abstract various sources of GPIOs so * they can all be accessed through a common programming interface. * Example sources would be SOC controllers, FPGAs, multifunction * chips, dedicated GPIO expanders, and so on. * * Each chip controls a number of signals, identified in method calls * by "offset" values in the range 0..(@ngpio - 1). When those signals * are referenced through calls like gpio_get_value(gpio), the offset * is calculated by subtracting @base from the gpio number. */struct gpio_chip { const char *label; struct gpio_device *gpiodev; struct device *parent; struct fwnode_handle *fwnode; struct module *owner;
int (*request)(struct gpio_chip *gc, unsigned int offset); void (*free)(struct gpio_chip *gc, unsigned int offset); int (*get_direction)(struct gpio_chip *gc, unsigned int offset); int (*direction_input)(struct gpio_chip *gc, unsigned int offset); int (*direction_output)(struct gpio_chip *gc, unsigned int offset, int value); int (*get)(struct gpio_chip *gc, unsigned int offset); int (*get_multiple)(struct gpio_chip *gc, unsigned long *mask, unsigned long *bits); int (*set)(struct gpio_chip *gc, unsigned int offset, int value); int (*set_multiple)(struct gpio_chip *gc, unsigned long *mask, unsigned long *bits); int (*set_config)(struct gpio_chip *gc, unsigned int offset, unsigned long config); int (*to_irq)(struct gpio_chip *gc, unsigned int offset);
void (*dbg_show)(struct seq_file *s, struct gpio_chip *gc);
int (*init_valid_mask)(struct gpio_chip *gc, unsigned long *valid_mask, unsigned int ngpios);
int (*add_pin_ranges)(struct gpio_chip *gc);
int (*en_hw_timestamp)(struct gpio_chip *gc, u32 offset, unsigned long flags); int (*dis_hw_timestamp)(struct gpio_chip *gc, u32 offset, unsigned long flags); int base; u16 ngpio; u16 offset; const char *const *names; bool can_sleep;
#ifdef CONFIG_GPIOLIB_IRQCHIP /* * With CONFIG_GPIOLIB_IRQCHIP we get an irqchip inside the gpiolib * to handle IRQs for most practical cases. */
/** * @irq: * * Integrates interrupt chip functionality with the GPIO chip. Can be * used to handle IRQs for most practical cases. */ struct gpio_irq_chip irq;#endif /* CONFIG_GPIOLIB_IRQCHIP */
#if defined(CONFIG_OF_GPIO) /* * If CONFIG_OF_GPIO is enabled, then all GPIO controllers described in * the device tree automatically may have an OF translation */
/** * @of_gpio_n_cells: * * Number of cells used to form the GPIO specifier. The standard is 2 * cells: * * gpios = <&gpio offset flags>; * * some complex GPIO controllers instantiate more than one chip per * device tree node and have 3 cells: * * gpios = <&gpio instance offset flags>; * * Legacy GPIO controllers may even have 1 cell: * * gpios = <&gpio offset>; */ unsigned int of_gpio_n_cells;
/** * @of_node_instance_match: * * Determine if a chip is the right instance. Must be implemented by * any driver using more than one gpio_chip per device tree node. * Returns true if gc is the instance indicated by i (which is the * first cell in the phandles for GPIO lines and gpio-ranges). */ bool (*of_node_instance_match)(struct gpio_chip *gc, unsigned int i);
/** * @of_xlate: * * Callback to translate a device tree GPIO specifier into a chip- * relative GPIO number and flags. */ int (*of_xlate)(struct gpio_chip *gc, const struct of_phandle_args *gpiospec, u32 *flags);#endif /* CONFIG_OF_GPIO */};
char *gpiochip_dup_line_label(struct gpio_chip *gc, unsigned int offset);
struct _gpiochip_for_each_data { const char **label; unsigned int *i;};
DEFINE_CLASS(_gpiochip_for_each_data, struct _gpiochip_for_each_data, if (*_T.label) kfree(*_T.label), ({ struct _gpiochip_for_each_data _data = { label, i }; *_data.i = 0; _data; }), const char **label, int *i)
/** * for_each_hwgpio_in_range - Iterates over all GPIOs in a given range * @_chip: Chip to iterate over. * @_i: Loop counter. * @_base: First GPIO in the ranger. * @_size: Amount of GPIOs to check starting from @base. * @_label: Place to store the address of the label if the GPIO is requested. * Set to NULL for unused GPIOs. */#define for_each_hwgpio_in_range(_chip, _i, _base, _size, _label) \ for (CLASS(_gpiochip_for_each_data, _data)(&_label, &_i); \ _i < _size; \ _i++, kfree(_label), _label = NULL) \ for_each_if(!IS_ERR(_label = gpiochip_dup_line_label(_chip, _base + _i)))
/** * for_each_hwgpio - Iterates over all GPIOs for given chip. * @_chip: Chip to iterate over. * @_i: Loop counter. * @_label: Place to store the address of the label if the GPIO is requested. * Set to NULL for unused GPIOs. */#define for_each_hwgpio(_chip, _i, _label) \ for_each_hwgpio_in_range(_chip, _i, 0, _chip->ngpio, _label)
/** * for_each_requested_gpio_in_range - iterates over requested GPIOs in a given range * @_chip: the chip to query * @_i: loop variable * @_base: first GPIO in the range * @_size: amount of GPIOs to check starting from @base * @_label: label of current GPIO */#define for_each_requested_gpio_in_range(_chip, _i, _base, _size, _label) \ for_each_hwgpio_in_range(_chip, _i, _base, _size, _label) \ for_each_if(_label)
/* Iterates over all requested GPIO of the given @chip */#define for_each_requested_gpio(chip, i, label) \ for_each_requested_gpio_in_range(chip, i, 0, chip->ngpio, label)
/* add/remove chips */int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data, struct lock_class_key *lock_key, struct lock_class_key *request_key);
/** * gpiochip_add_data() - register a gpio_chip * @gc: the chip to register, with gc->base initialized * @data: driver-private data associated with this chip * * Context: potentially before irqs will work * * When gpiochip_add_data() is called very early during boot, so that GPIOs * can be freely used, the gc->parent device must be registered before * the gpio framework's arch_initcall(). Otherwise sysfs initialization * for GPIOs will fail rudely. * * gpiochip_add_data() must only be called after gpiolib initialization, * i.e. after core_initcall(). * * If gc->base is negative, this requests dynamic assignment of * a range of valid GPIOs. * * Returns: * A negative errno if the chip can't be registered, such as because the * gc->base is invalid or already associated with a different chip. * Otherwise it returns zero as a success code. */#ifdef CONFIG_LOCKDEP#define gpiochip_add_data(gc, data) ({ \ static struct lock_class_key lock_key; \ static struct lock_class_key request_key; \ gpiochip_add_data_with_key(gc, data, &lock_key, \ &request_key); \ })#define devm_gpiochip_add_data(dev, gc, data) ({ \ static struct lock_class_key lock_key; \ static struct lock_class_key request_key; \ devm_gpiochip_add_data_with_key(dev, gc, data, &lock_key, \ &request_key); \ })#else#define gpiochip_add_data(gc, data) gpiochip_add_data_with_key(gc, data, NULL, NULL)#define devm_gpiochip_add_data(dev, gc, data) \ devm_gpiochip_add_data_with_key(dev, gc, data, NULL, NULL)#endif /* CONFIG_LOCKDEP */
void gpiochip_remove(struct gpio_chip *gc);int devm_gpiochip_add_data_with_key(struct device *dev, struct gpio_chip *gc, void *data, struct lock_class_key *lock_key, struct lock_class_key *request_key);
struct gpio_device *gpio_device_find(const void *data, int (*match)(struct gpio_chip *gc, const void *data));
struct gpio_device *gpio_device_get(struct gpio_device *gdev);void gpio_device_put(struct gpio_device *gdev);
DEFINE_FREE(gpio_device_put, struct gpio_device *, if (!IS_ERR_OR_NULL(_T)) gpio_device_put(_T))
struct device *gpio_device_to_device(struct gpio_device *gdev);
bool gpiochip_line_is_irq(struct gpio_chip *gc, unsigned int offset);int gpiochip_reqres_irq(struct gpio_chip *gc, unsigned int offset);void gpiochip_relres_irq(struct gpio_chip *gc, unsigned int offset);void gpiochip_disable_irq(struct gpio_chip *gc, unsigned int offset);void gpiochip_enable_irq(struct gpio_chip *gc, unsigned int offset);
/* irq_data versions of the above */int gpiochip_irq_reqres(struct irq_data *data);void gpiochip_irq_relres(struct irq_data *data);
/* Paste this in your irq_chip structure */#define GPIOCHIP_IRQ_RESOURCE_HELPERS \ .irq_request_resources = gpiochip_irq_reqres, \ .irq_release_resources = gpiochip_irq_relres
static inline void gpio_irq_chip_set_chip(struct gpio_irq_chip *girq, const struct irq_chip *chip){ /* Yes, dropping const is ugly, but it isn't like we have a choice */ girq->chip = (struct irq_chip *)chip;}
/* Line status inquiry for drivers */bool gpiochip_line_is_open_drain(struct gpio_chip *gc, unsigned int offset);bool gpiochip_line_is_open_source(struct gpio_chip *gc, unsigned int offset);
/* Sleep persistence inquiry for drivers */bool gpiochip_line_is_persistent(struct gpio_chip *gc, unsigned int offset);bool gpiochip_line_is_valid(const struct gpio_chip *gc, unsigned int offset);const unsigned long *gpiochip_query_valid_mask(const struct gpio_chip *gc);
/* get driver data */void *gpiochip_get_data(struct gpio_chip *gc);
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
int gpiochip_populate_parent_fwspec_twocell(struct gpio_chip *gc, union gpio_irq_fwspec *gfwspec, unsigned int parent_hwirq, unsigned int parent_type);int gpiochip_populate_parent_fwspec_fourcell(struct gpio_chip *gc, union gpio_irq_fwspec *gfwspec, unsigned int parent_hwirq, unsigned int parent_type);
#endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */
#ifdef CONFIG_GPIOLIB_IRQCHIPint gpiochip_irqchip_add_domain(struct gpio_chip *gc, struct irq_domain *domain);#else
#include <asm/bug.h>
static inline int gpiochip_irqchip_add_domain(struct gpio_chip *gc, struct irq_domain *domain){ WARN_ON(1); return -EINVAL;}#endif
int gpiochip_generic_request(struct gpio_chip *gc, unsigned int offset);void gpiochip_generic_free(struct gpio_chip *gc, unsigned int offset);int gpiochip_generic_config(struct gpio_chip *gc, unsigned int offset, unsigned long config);
/** * struct gpio_pin_range - pin range controlled by a gpio chip * @node: list for maintaining set of pin ranges, used internally * @pctldev: pinctrl device which handles corresponding pins * @range: actual range of pins controlled by a gpio controller */struct gpio_pin_range { struct list_head node; struct pinctrl_dev *pctldev; struct pinctrl_gpio_range range;};
#ifdef CONFIG_PINCTRL
int gpiochip_add_pin_range_with_pins(struct gpio_chip *gc, const char *pinctl_name, unsigned int gpio_offset, unsigned int pin_offset, unsigned int const *pins, unsigned int npins);int gpiochip_add_pingroup_range(struct gpio_chip *gc, struct pinctrl_dev *pctldev, unsigned int gpio_offset, const char *pin_group);void gpiochip_remove_pin_ranges(struct gpio_chip *gc);
static inline intgpiochip_add_pin_range(struct gpio_chip *gc, const char *pinctl_name, unsigned int gpio_offset, unsigned int pin_offset, unsigned int npins){ return gpiochip_add_pin_range_with_pins(gc, pinctl_name, gpio_offset, pin_offset, NULL, npins);}
static inline intgpiochip_add_sparse_pin_range(struct gpio_chip *gc, const char *pinctl_name, unsigned int gpio_offset, unsigned int const *pins, unsigned int npins){ return gpiochip_add_pin_range_with_pins(gc, pinctl_name, gpio_offset, 0, pins, npins);}#else /* ! CONFIG_PINCTRL */
static inline intgpiochip_add_pin_range_with_pins(struct gpio_chip *gc, const char *pinctl_name, unsigned int gpio_offset, unsigned int pin_offset, unsigned int npins){ return 0;}
static inline intgpiochip_add_pin_range(struct gpio_chip *gc, const char *pinctl_name, unsigned int gpio_offset, unsigned int pin_offset, unsigned int npins){ return 0;}
static inline intgpiochip_add_sparse_pin_range(struct gpio_chip *gc, const char *pinctl_name, unsigned int gpio_offset, unsigned int const *pins, unsigned int npins){ return 0;}
static inline intgpiochip_add_pingroup_range(struct gpio_chip *gc, struct pinctrl_dev *pctldev, unsigned int gpio_offset, const char *pin_group){ return 0;}
static inline voidgpiochip_remove_pin_ranges(struct gpio_chip *gc){}
#endif /* CONFIG_PINCTRL */
struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *gc, unsigned int hwnum, const char *label, enum gpio_lookup_flags lflags, enum gpiod_flags dflags);void gpiochip_free_own_desc(struct gpio_desc *desc);
struct gpio_desc *gpio_device_get_desc(struct gpio_device *gdev, unsigned int hwnum);
struct gpio_chip *gpio_device_get_chip(struct gpio_device *gdev);
#ifdef CONFIG_GPIOLIB
/* lock/unlock as IRQ */int gpiochip_lock_as_irq(struct gpio_chip *gc, unsigned int offset);void gpiochip_unlock_as_irq(struct gpio_chip *gc, unsigned int offset);
struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc);struct gpio_device *gpiod_to_gpio_device(struct gpio_desc *desc);
/* struct gpio_device getters */int gpio_device_get_base(struct gpio_device *gdev);const char *gpio_device_get_label(struct gpio_device *gdev);
struct gpio_device *gpio_device_find_by_label(const char *label);struct gpio_device *gpio_device_find_by_fwnode(const struct fwnode_handle *fwnode);
#else /* CONFIG_GPIOLIB */
#include <asm/bug.h>
static inline struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc){ /* GPIO can never have been requested */ WARN_ON(1); return ERR_PTR(-ENODEV);}
static inline struct gpio_device *gpiod_to_gpio_device(struct gpio_desc *desc){ WARN_ON(1); return ERR_PTR(-ENODEV);}
static inline int gpio_device_get_base(struct gpio_device *gdev){ WARN_ON(1); return -ENODEV;}
static inline const char *gpio_device_get_label(struct gpio_device *gdev){ WARN_ON(1); return NULL;}
static inline struct gpio_device *gpio_device_find_by_label(const char *label){ WARN_ON(1); return NULL;}
static inline struct gpio_device *gpio_device_find_by_fwnode(const struct fwnode_handle *fwnode){ WARN_ON(1); return NULL;}
static inline int gpiochip_lock_as_irq(struct gpio_chip *gc, unsigned int offset){ WARN_ON(1); return -EINVAL;}
static inline void gpiochip_unlock_as_irq(struct gpio_chip *gc, unsigned int offset){ WARN_ON(1);}#endif /* CONFIG_GPIOLIB */
#define for_each_gpiochip_node(dev, child) \ device_for_each_child_node(dev, child) \ for_each_if(fwnode_property_present(child, "gpio-controller"))
static inline unsigned int gpiochip_node_count(struct device *dev){ struct fwnode_handle *child; unsigned int count = 0;
for_each_gpiochip_node(dev, child) count++;
return count;}
static inline struct fwnode_handle *gpiochip_node_get_first(struct device *dev){ struct fwnode_handle *fwnode;
for_each_gpiochip_node(dev, fwnode) return fwnode;
return NULL;}
#endif /* __LINUX_GPIO_DRIVER_H */