diff options
Diffstat (limited to 'include/linux/gpio/driver.h')
| -rw-r--r-- | include/linux/gpio/driver.h | 39 |
1 files changed, 16 insertions, 23 deletions
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index 82fda487453f..bee976f82788 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -1,6 +1,7 @@ #ifndef __LINUX_GPIO_DRIVER_H #define __LINUX_GPIO_DRIVER_H +#include <linux/device.h> #include <linux/types.h> #include <linux/module.h> #include <linux/irq.h> @@ -10,22 +11,21 @@ #include <linux/pinctrl/pinctrl.h> #include <linux/kconfig.h> -struct device; struct gpio_desc; struct of_phandle_args; struct device_node; struct seq_file; +struct gpio_device; #ifdef CONFIG_GPIOLIB /** * struct gpio_chip - abstract a GPIO controller - * @label: for diagnostics + * @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 - * @cdev: class device used by sysfs interface (may be NULL) * @owner: helps prevent removal of modules exporting active GPIOs - * @data: per-instance data assigned by the driver - * @list: links gpio_chips together for traversal * @request: optional hook for chip-specific activation, such as * enabling module power and clock; may sleep * @free: optional hook for chip-specific deactivation, such as @@ -52,7 +52,6 @@ struct seq_file; * 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). - * @desc: array of ngpio descriptors. Private. * @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 @@ -107,11 +106,9 @@ struct seq_file; */ struct gpio_chip { const char *label; + struct gpio_device *gpiodev; struct device *parent; - struct device *cdev; struct module *owner; - void *data; - struct list_head list; int (*request)(struct gpio_chip *chip, unsigned offset); @@ -141,7 +138,6 @@ struct gpio_chip { struct gpio_chip *chip); int base; u16 ngpio; - struct gpio_desc *desc; const char *const *names; bool can_sleep; bool irq_not_threaded; @@ -184,15 +180,6 @@ struct gpio_chip { int (*of_xlate)(struct gpio_chip *gc, const struct of_phandle_args *gpiospec, u32 *flags); #endif -#ifdef CONFIG_PINCTRL - /* - * If CONFIG_PINCTRL is enabled, then gpio controllers can optionally - * describe the actual pin range which they serve in an SoC. This - * information would be used by pinctrl subsystem to configure - * corresponding pins for gpio usage. - */ - struct list_head pin_ranges; -#endif }; extern const char *gpiochip_is_requested(struct gpio_chip *chip, @@ -205,18 +192,24 @@ static inline int gpiochip_add(struct gpio_chip *chip) return gpiochip_add_data(chip, NULL); } extern void gpiochip_remove(struct gpio_chip *chip); +extern int devm_gpiochip_add_data(struct device *dev, struct gpio_chip *chip, + void *data); +extern void devm_gpiochip_remove(struct device *dev, struct gpio_chip *chip); + extern struct gpio_chip *gpiochip_find(void *data, int (*match)(struct gpio_chip *chip, void *data)); /* lock/unlock as IRQ */ int gpiochip_lock_as_irq(struct gpio_chip *chip, unsigned int offset); void gpiochip_unlock_as_irq(struct gpio_chip *chip, unsigned int offset); +bool gpiochip_line_is_irq(struct gpio_chip *chip, unsigned int offset); + +/* Line status inquiry for drivers */ +bool gpiochip_line_is_open_drain(struct gpio_chip *chip, unsigned int offset); +bool gpiochip_line_is_open_source(struct gpio_chip *chip, unsigned int offset); /* get driver data */ -static inline void *gpiochip_get_data(struct gpio_chip *chip) -{ - return chip->data; -} +void *gpiochip_get_data(struct gpio_chip *chip); struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc); |