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Commit 295494af authored by Octavian Purdila's avatar Octavian Purdila Committed by Linus Walleij
Browse files

gpiolib: add irq_not_threaded flag to gpio_chip 



Some GPIO chips (e.g. the DLN2 USB adapter) have blocking get/set
operation but do not need a threaded irq handler.

Signed-off-by: default avatarOctavian Purdila <octavian.purdila@intel.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 4f51b913

drivers/gpio/gpiolib.c

+1 −1
Original line number Original line Diff line number Diff line
@@ -437,7 +437,7 @@ static int gpiochip_irq_map(struct irq_domain *d, unsigned int irq, 
	irq_set_lockdep_class(irq, &gpiochip_irq_lock_class);

	irq_set_lockdep_class(irq, &gpiochip_irq_lock_class);

	irq_set_chip_and_handler(irq, chip->irqchip, chip->irq_handler);

	irq_set_chip_and_handler(irq, chip->irqchip, chip->irq_handler);

	/* Chips that can sleep need nested thread handlers */

	/* Chips that can sleep need nested thread handlers */

	if (chip->can_sleep)

	if (chip->can_sleep && !chip->irq_not_threaded)

		irq_set_nested_thread(irq, 1);

		irq_set_nested_thread(irq, 1);

#ifdef CONFIG_ARM

#ifdef CONFIG_ARM

	set_irq_flags(irq, IRQF_VALID);

	set_irq_flags(irq, IRQF_VALID);

include/linux/gpio/driver.h

+3 −0
Original line number Original line Diff line number Diff line
@@ -56,6 +56,8 @@ struct seq_file; 
 *	as the chip access may sleep when e.g. reading out the IRQ status

 *	as the chip access may sleep when e.g. reading out the IRQ status

 *	registers.

 *	registers.

 * @exported: flags if the gpiochip is exported for use from sysfs. Private.

 * @exported: flags if the gpiochip is exported for use from sysfs. Private.

 * @irq_not_threaded: flag must be set if @can_sleep is set but the

 *	IRQs don't need to be threaded

 *

 *

 * A gpio_chip can help platforms abstract various sources of GPIOs so

 * A gpio_chip can help platforms abstract various sources of GPIOs so

 * they can all be accessed through a common programing interface.

 * they can all be accessed through a common programing interface.
@@ -101,6 +103,7 @@ struct gpio_chip { 
	struct gpio_desc	*desc;

	struct gpio_desc	*desc;

	const char		*const *names;

	const char		*const *names;

	bool			can_sleep;

	bool			can_sleep;

	bool			irq_not_threaded;

	bool			exported;

	bool			exported;





#ifdef CONFIG_GPIOLIB_IRQCHIP

#ifdef CONFIG_GPIOLIB_IRQCHIP