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Commit 3cfeffc2 authored by Stefan Agner's avatar Stefan Agner Committed by Thomas Gleixner
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genirq: Add irq_chip_(enable/disable)_parent 



Add helper irq_chip_enable_parent and irq_chip_disable_parent. The
helper implement the default behavior in case irq_enable or irq_disable
is not implemented for the parent interrupt chip, which is calling the
irq_mask or irq_unmask respectively.

Signed-off-by: default avatarStefan Agner <stefan@agner.ch>
Cc: marc.zyngier@arm.com
Cc: linux@arm.linux.org.uk
Cc: u.kleine-koenig@pengutronix.de
Cc: olof@lixom.net
Cc: arnd@arndb.de
Cc: daniel.lezcano@linaro.org
Cc: mark.rutland@arm.com
Cc: pawel.moll@arm.com
Cc: robh+dt@kernel.org
Cc: ijc+devicetree@hellion.org.uk
Cc: galak@codeaurora.org
Cc: mcoquelin.stm32@gmail.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: shawn.guo@linaro.org
Cc: kernel@pengutronix.de
Cc: jason@lakedaemon.net
Link: http://lkml.kernel.org/r/1431769465-26867-3-git-send-email-stefan@agner.ch


Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 5f22f5c6

include/linux/irq.h

+2 −0
Original line number Diff line number Diff line
@@ -458,6 +458,8 @@ extern void handle_nested_irq(unsigned int irq); 


extern int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg);

#ifdef	CONFIG_IRQ_DOMAIN_HIERARCHY

extern void irq_chip_enable_parent(struct irq_data *data);

extern void irq_chip_disable_parent(struct irq_data *data);

extern void irq_chip_ack_parent(struct irq_data *data);

extern int irq_chip_retrigger_hierarchy(struct irq_data *data);

extern void irq_chip_mask_parent(struct irq_data *data);

kernel/irq/chip.c

+28 −0
Original line number Diff line number Diff line
@@ -875,6 +875,34 @@ void irq_cpu_offline(void) 
}



#ifdef	CONFIG_IRQ_DOMAIN_HIERARCHY

/**

 * irq_chip_enable_parent - Enable the parent interrupt (defaults to unmask if

 * NULL)

 * @data:	Pointer to interrupt specific data

 */

void irq_chip_enable_parent(struct irq_data *data)

{

	data = data->parent_data;

	if (data->chip->irq_enable)

		data->chip->irq_enable(data);

	else

		data->chip->irq_unmask(data);

}



/**

 * irq_chip_disable_parent - Disable the parent interrupt (defaults to mask if

 * NULL)

 * @data:	Pointer to interrupt specific data

 */

void irq_chip_disable_parent(struct irq_data *data)

{

	data = data->parent_data;

	if (data->chip->irq_disable)

		data->chip->irq_disable(data);

	else

		data->chip->irq_mask(data);

}



/**

 * irq_chip_ack_parent - Acknowledge the parent interrupt

 * @data:	Pointer to interrupt specific data