diff options
Diffstat (limited to 'drivers/gpio/gpiolib.h')
| -rw-r--r-- | drivers/gpio/gpiolib.h | 41 |
1 files changed, 34 insertions, 7 deletions
diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index 99ed3b00ffe9..1524ba0ca99d 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -12,14 +12,41 @@ #ifndef GPIOLIB_H #define GPIOLIB_H +#include <linux/gpio/driver.h> #include <linux/err.h> #include <linux/device.h> +#include <linux/module.h> +#include <linux/cdev.h> enum of_gpio_flags; enum gpiod_flags; struct acpi_device; /** + * struct gpio_device - internal state container for GPIO devices + * @id: numerical ID number for the GPIO chip + * @dev: the GPIO device struct + * @chrdev: character device for the GPIO device + * @owner: helps prevent removal of modules exporting active GPIOs + * @chip: pointer to the corresponding gpiochip, holding static + * data for this device + * @list: links gpio_device:s together for traversal + * + * This state container holds most of the runtime variable data + * for a GPIO device and can hold references and live on after the + * GPIO chip has been removed, if it is still being used from + * userspace. + */ +struct gpio_device { + int id; + struct device dev; + struct cdev chrdev; + struct module *owner; + struct gpio_chip *chip; + struct list_head list; +}; + +/** * struct acpi_gpio_info - ACPI GPIO specific information * @gpioint: if %true this GPIO is of type GpioInt otherwise type is GpioIo * @active_low: in case of @gpioint, the pin is active low @@ -90,7 +117,7 @@ struct gpio_desc *of_get_named_gpiod_flags(struct device_node *np, struct gpio_desc *gpiochip_get_desc(struct gpio_chip *chip, u16 hwnum); extern struct spinlock gpio_lock; -extern struct list_head gpio_chips; +extern struct list_head gpio_devices; struct gpio_desc { struct gpio_chip *chip; @@ -149,17 +176,17 @@ static int __maybe_unused gpio_chip_hwgpio(const struct gpio_desc *desc) /* With chip prefix */ #define chip_emerg(chip, fmt, ...) \ - pr_emerg("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__) + dev_emerg(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__) #define chip_crit(chip, fmt, ...) \ - pr_crit("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__) + dev_crit(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__) #define chip_err(chip, fmt, ...) \ - pr_err("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__) + dev_err(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__) #define chip_warn(chip, fmt, ...) \ - pr_warn("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__) + dev_warn(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__) #define chip_info(chip, fmt, ...) \ - pr_info("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__) + dev_info(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__) #define chip_dbg(chip, fmt, ...) \ - pr_debug("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__) + dev_dbg(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__) #ifdef CONFIG_GPIO_SYSFS |