diff options
Diffstat (limited to 'include/linux/gpio')
| -rw-r--r-- | include/linux/gpio/consumer.h | 19 | ||||
| -rw-r--r-- | include/linux/gpio/driver.h | 104 |
2 files changed, 81 insertions, 42 deletions
diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h index 4d34dbbbad4d..bed128e8f4b1 100644 --- a/include/linux/gpio/consumer.h +++ b/include/linux/gpio/consumer.h @@ -4,10 +4,7 @@ #include <linux/err.h> #include <linux/kernel.h> -#ifdef CONFIG_GPIOLIB - struct device; -struct gpio_chip; /** * Opaque descriptor for a GPIO. These are obtained using gpiod_get() and are @@ -18,6 +15,8 @@ struct gpio_chip; */ struct gpio_desc; +#ifdef CONFIG_GPIOLIB + /* Acquire and dispose GPIOs */ struct gpio_desc *__must_check gpiod_get(struct device *dev, const char *con_id); @@ -36,6 +35,7 @@ void devm_gpiod_put(struct device *dev, struct gpio_desc *desc); int gpiod_get_direction(const struct gpio_desc *desc); int gpiod_direction_input(struct gpio_desc *desc); int gpiod_direction_output(struct gpio_desc *desc, int value); +int gpiod_direction_output_raw(struct gpio_desc *desc, int value); /* Value get/set from non-sleeping context */ int gpiod_get_value(const struct gpio_desc *desc); @@ -59,7 +59,6 @@ int gpiod_to_irq(const struct gpio_desc *desc); /* Convert between the old gpio_ and new gpiod_ interfaces */ struct gpio_desc *gpio_to_desc(unsigned gpio); int desc_to_gpio(const struct gpio_desc *desc); -struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc); #else /* CONFIG_GPIOLIB */ @@ -121,6 +120,12 @@ static inline int gpiod_direction_output(struct gpio_desc *desc, int value) WARN_ON(1); return -ENOSYS; } +static inline int gpiod_direction_output_raw(struct gpio_desc *desc, int value) +{ + /* GPIO can never have been requested */ + WARN_ON(1); + return -ENOSYS; +} static inline int gpiod_get_value(const struct gpio_desc *desc) @@ -207,12 +212,6 @@ static inline int desc_to_gpio(const struct gpio_desc *desc) WARN_ON(1); return -EINVAL; } -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); -} #endif /* CONFIG_GPIOLIB */ diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index 3ea2cf6b0e6c..1827b43966d9 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -3,6 +3,9 @@ #include <linux/types.h> #include <linux/module.h> +#include <linux/irq.h> +#include <linux/irqchip/chained_irq.h> +#include <linux/irqdomain.h> struct device; struct gpio_desc; @@ -10,6 +13,8 @@ struct of_phandle_args; struct device_node; struct seq_file; +#ifdef CONFIG_GPIOLIB + /** * struct gpio_chip - abstract a GPIO controller * @label: for diagnostics @@ -39,14 +44,15 @@ struct seq_file; * @ngpio: the number of GPIOs handled by this controller; the last GPIO * handled is (base + ngpio - 1). * @desc: array of ngpio descriptors. Private. - * @can_sleep: flag must be set iff get()/set() methods sleep, as they - * must while accessing GPIO expander chips over I2C or SPI * @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. A name can include a single printk * format specifier for an unsigned int. It is substituted by the actual * number of the gpio. + * @can_sleep: flag must be set iff get()/set() methods sleep, as they + * must while accessing GPIO expander chips over I2C or SPI + * @exported: flags if the gpiochip is exported for use from sysfs. Private. * * A gpio_chip can help platforms abstract various sources of GPIOs so * they can all be accessed through a common programing interface. @@ -91,8 +97,20 @@ struct gpio_chip { u16 ngpio; struct gpio_desc *desc; const char *const *names; - unsigned can_sleep:1; - unsigned exported:1; + bool can_sleep; + bool exported; + +#ifdef CONFIG_GPIOLIB_IRQCHIP + /* + * With CONFIG_GPIO_IRQCHIP we get an irqchip inside the gpiolib + * to handle IRQs for most practical cases. + */ + struct irq_chip *irqchip; + struct irq_domain *irqdomain; + unsigned int irq_base; + irq_flow_handler_t irq_handler; + unsigned int irq_default_type; +#endif #if defined(CONFIG_OF_GPIO) /* @@ -128,6 +146,11 @@ extern struct gpio_chip *gpiochip_find(void *data, int gpiod_lock_as_irq(struct gpio_desc *desc); void gpiod_unlock_as_irq(struct gpio_desc *desc); +struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc); + +struct gpio_desc *gpiochip_get_desc(struct gpio_chip *chip, + u16 hwnum); + enum gpio_lookup_flags { GPIO_ACTIVE_HIGH = (0 << 0), GPIO_ACTIVE_LOW = (1 << 0), @@ -136,59 +159,76 @@ enum gpio_lookup_flags { }; /** - * Lookup table for associating GPIOs to specific devices and functions using - * platform data. + * struct gpiod_lookup - lookup table + * @chip_label: name of the chip the GPIO belongs to + * @chip_hwnum: hardware number (i.e. relative to the chip) of the GPIO + * @con_id: name of the GPIO from the device's point of view + * @idx: index of the GPIO in case several GPIOs share the same name + * @flags: mask of GPIO_* values + * + * gpiod_lookup is a lookup table for associating GPIOs to specific devices and + * functions using platform data. */ struct gpiod_lookup { - struct list_head list; - /* - * name of the chip the GPIO belongs to - */ const char *chip_label; - /* - * hardware number (i.e. relative to the chip) of the GPIO - */ u16 chip_hwnum; - /* - * name of device that can claim this GPIO - */ - const char *dev_id; - /* - * name of the GPIO from the device's point of view - */ const char *con_id; - /* - * index of the GPIO in case several GPIOs share the same name - */ unsigned int idx; - /* - * mask of GPIO_* values - */ enum gpio_lookup_flags flags; }; +struct gpiod_lookup_table { + struct list_head list; + const char *dev_id; + struct gpiod_lookup table[]; +}; + /* * Simple definition of a single GPIO under a con_id */ -#define GPIO_LOOKUP(_chip_label, _chip_hwnum, _dev_id, _con_id, _flags) \ - GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _dev_id, _con_id, 0, _flags) +#define GPIO_LOOKUP(_chip_label, _chip_hwnum, _con_id, _flags) \ + GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, 0, _flags) /* * Use this macro if you need to have several GPIOs under the same con_id. * Each GPIO needs to use a different index and can be accessed using * gpiod_get_index() */ -#define GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _dev_id, _con_id, _idx, \ - _flags) \ +#define GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, _idx, _flags) \ { \ .chip_label = _chip_label, \ .chip_hwnum = _chip_hwnum, \ - .dev_id = _dev_id, \ .con_id = _con_id, \ .idx = _idx, \ .flags = _flags, \ } -void gpiod_add_table(struct gpiod_lookup *table, size_t size); +void gpiod_add_lookup_table(struct gpiod_lookup_table *table); + +#ifdef CONFIG_GPIOLIB_IRQCHIP + +void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip, + struct irq_chip *irqchip, + int parent_irq, + irq_flow_handler_t parent_handler); + +int gpiochip_irqchip_add(struct gpio_chip *gpiochip, + struct irq_chip *irqchip, + unsigned int first_irq, + irq_flow_handler_t handler, + unsigned int type); + +#endif /* CONFIG_GPIO_IRQCHIP */ + +#else /* CONFIG_GPIOLIB */ + +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); +} + +#endif /* CONFIG_GPIOLIB */ #endif |