diff options
| -rw-r--r-- | drivers/gpio/gpiolib.c | 29 | ||||
| -rw-r--r-- | drivers/gpio/gpiolib.h | 1 | ||||
| -rw-r--r-- | include/linux/gpio/driver.h | 2 |
3 files changed, 30 insertions, 2 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index b17f1142c70b..e52fa72f13d7 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -2588,8 +2588,9 @@ int gpiod_direction_output(struct gpio_desc *desc, int value) else value = !!value; - /* GPIOs used for IRQs shall not be set as output */ - if (test_bit(FLAG_USED_AS_IRQ, &desc->flags)) { + /* GPIOs used for enabled IRQs shall not be set as output */ + if (test_bit(FLAG_USED_AS_IRQ, &desc->flags) && + test_bit(FLAG_IRQ_IS_ENABLED, &desc->flags)) { gpiod_err(desc, "%s: tried to set a GPIO tied to an IRQ as output\n", __func__); @@ -3276,6 +3277,7 @@ int gpiochip_lock_as_irq(struct gpio_chip *chip, unsigned int offset) } set_bit(FLAG_USED_AS_IRQ, &desc->flags); + set_bit(FLAG_IRQ_IS_ENABLED, &desc->flags); /* * If the consumer has not set up a label (such as when the @@ -3306,6 +3308,7 @@ void gpiochip_unlock_as_irq(struct gpio_chip *chip, unsigned int offset) return; clear_bit(FLAG_USED_AS_IRQ, &desc->flags); + clear_bit(FLAG_IRQ_IS_ENABLED, &desc->flags); /* If we only had this marking, erase it */ if (desc->label && !strcmp(desc->label, "interrupt")) @@ -3313,6 +3316,28 @@ void gpiochip_unlock_as_irq(struct gpio_chip *chip, unsigned int offset) } EXPORT_SYMBOL_GPL(gpiochip_unlock_as_irq); +void gpiochip_disable_irq(struct gpio_chip *chip, unsigned int offset) +{ + struct gpio_desc *desc = gpiochip_get_desc(chip, offset); + + if (!IS_ERR(desc) && + !WARN_ON(!test_bit(FLAG_USED_AS_IRQ, &desc->flags))) + clear_bit(FLAG_IRQ_IS_ENABLED, &desc->flags); +} +EXPORT_SYMBOL_GPL(gpiochip_disable_irq); + +void gpiochip_enable_irq(struct gpio_chip *chip, unsigned int offset) +{ + struct gpio_desc *desc = gpiochip_get_desc(chip, offset); + + if (!IS_ERR(desc) && + !WARN_ON(!test_bit(FLAG_USED_AS_IRQ, &desc->flags))) { + WARN_ON(test_bit(FLAG_IS_OUT, &desc->flags)); + set_bit(FLAG_IRQ_IS_ENABLED, &desc->flags); + } +} +EXPORT_SYMBOL_GPL(gpiochip_enable_irq); + bool gpiochip_line_is_irq(struct gpio_chip *chip, unsigned int offset) { if (offset >= chip->ngpio) diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index a7e49fef73d4..e9a86f4b00e3 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -214,6 +214,7 @@ struct gpio_desc { #define FLAG_OPEN_DRAIN 7 /* Gpio is open drain type */ #define FLAG_OPEN_SOURCE 8 /* Gpio is open source type */ #define FLAG_USED_AS_IRQ 9 /* GPIO is connected to an IRQ */ +#define FLAG_IRQ_IS_ENABLED 10 /* GPIO is connected to an enabled IRQ */ #define FLAG_IS_HOGGED 11 /* GPIO is hogged */ #define FLAG_TRANSITORY 12 /* GPIO may lose value in sleep or reset */ diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index 479f1ccaaebd..9052ccd399fd 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -403,6 +403,8 @@ void gpiochip_unlock_as_irq(struct gpio_chip *chip, unsigned int offset); bool gpiochip_line_is_irq(struct gpio_chip *chip, unsigned int offset); int gpiochip_reqres_irq(struct gpio_chip *chip, unsigned int offset); void gpiochip_relres_irq(struct gpio_chip *chip, unsigned int offset); +void gpiochip_disable_irq(struct gpio_chip *chip, unsigned int offset); +void gpiochip_enable_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); |