Commit ef74f70e authored by Brian Masney's avatar Brian Masney Committed by Linus Walleij
Browse files

gpio: add irq domain activate/deactivate functions 



This adds the two new functions gpiochip_irq_domain_activate and
gpiochip_irq_domain_deactivate that can be used as the activate and
deactivate functions in the struct irq_domain_ops. This is for
situations where only gpiochip_{lock,unlock}_as_irq needs to be called.
SPMI and SSBI GPIO are two users that will initially use these
functions.

Signed-off-by: default avatarBrian Masney <masneyb@onstation.org>
Suggested-by: default avatarStephen Boyd <sboyd@kernel.org>
Reviewed-by: default avatarStephen Boyd <sboyd@kernel.org>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 12a9eeae

drivers/gpio/gpiolib.c

+37 −0
Original line number Diff line number Diff line
@@ -1775,6 +1775,43 @@ static const struct irq_domain_ops gpiochip_domain_ops = { 
	.xlate	= irq_domain_xlate_twocell,

};



/**

 * gpiochip_irq_domain_activate() - Lock a GPIO to be used as an IRQ

 * @domain: The IRQ domain used by this IRQ chip

 * @data: Outermost irq_data associated with the IRQ

 * @reserve: If set, only reserve an interrupt vector instead of assigning one

 *

 * This function is a wrapper that calls gpiochip_lock_as_irq() and is to be

 * used as the activate function for the &struct irq_domain_ops. The host_data

 * for the IRQ domain must be the &struct gpio_chip.

 */

int gpiochip_irq_domain_activate(struct irq_domain *domain,

				 struct irq_data *data, bool reserve)

{

	struct gpio_chip *chip = domain->host_data;



	return gpiochip_lock_as_irq(chip, data->hwirq);

}

EXPORT_SYMBOL_GPL(gpiochip_irq_domain_activate);



/**

 * gpiochip_irq_domain_deactivate() - Unlock a GPIO used as an IRQ

 * @domain: The IRQ domain used by this IRQ chip

 * @data: Outermost irq_data associated with the IRQ

 *

 * This function is a wrapper that will call gpiochip_unlock_as_irq() and is to

 * be used as the deactivate function for the &struct irq_domain_ops. The

 * host_data for the IRQ domain must be the &struct gpio_chip.

 */

void gpiochip_irq_domain_deactivate(struct irq_domain *domain,

				    struct irq_data *data)

{

	struct gpio_chip *chip = domain->host_data;



	return gpiochip_unlock_as_irq(chip, data->hwirq);

}

EXPORT_SYMBOL_GPL(gpiochip_irq_domain_deactivate);



static int gpiochip_to_irq(struct gpio_chip *chip, unsigned offset)

{

	if (!gpiochip_irqchip_irq_valid(chip, offset))

include/linux/gpio/driver.h

+5 −0
Original line number Diff line number Diff line
@@ -472,6 +472,11 @@ int gpiochip_irq_map(struct irq_domain *d, unsigned int irq, 
		     irq_hw_number_t hwirq);

void gpiochip_irq_unmap(struct irq_domain *d, unsigned int irq);



int gpiochip_irq_domain_activate(struct irq_domain *domain,

				 struct irq_data *data, bool reserve);

void gpiochip_irq_domain_deactivate(struct irq_domain *domain,

				    struct irq_data *data);



void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,

		struct irq_chip *irqchip,

		unsigned int parent_irq,

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