Commit 56e8abab authored by Yingjoe Chen's avatar Yingjoe Chen Committed by Thomas Gleixner
Browse files

genirq: Add more helper functions to support stacked irq_chip 



Add more helper function for stacked irq_chip to just call parent's
function.

Signed-off-by: default avatarYingjoe Chen <yingjoe.chen@mediatek.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Gran Likely <grant.likely@linaro.org>
Cc: Boris BREZILLON <boris.brezillon@free-electrons.com>
Cc: <linux-arm-kernel@lists.infradead.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Yijing Wang <wangyijing@huawei.com>
Cc: <srv_heupstream@mediatek.com>
Cc: <yingjoe.chen@gmail.com>
Cc: <hc.yen@mediatek.com>
Cc: <eddie.huang@mediatek.com>
Cc: <nathan.chung@mediatek.com>
Cc: <yh.chen@mediatek.com>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Link: http://lkml.kernel.org/r/1415893029-2971-3-git-send-email-yingjoe.chen@mediatek.com


Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 85f08c17

include/linux/irq.h

+6 −0
Original line number Diff line number Diff line
@@ -446,6 +446,12 @@ extern void handle_nested_irq(unsigned int irq); 
#ifdef	CONFIG_IRQ_DOMAIN_HIERARCHY

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);

extern void irq_chip_unmask_parent(struct irq_data *data);

extern void irq_chip_eoi_parent(struct irq_data *data);

extern int irq_chip_set_affinity_parent(struct irq_data *data,

					const struct cpumask *dest,

					bool force);

#endif



/* Handling of unhandled and spurious interrupts: */

kernel/irq/chip.c

+48 −0
Original line number Diff line number Diff line
@@ -862,6 +862,54 @@ void irq_chip_ack_parent(struct irq_data *data) 
	data->chip->irq_ack(data);

}



/**

 * irq_chip_mask_parent - Mask the parent interrupt

 * @data:	Pointer to interrupt specific data

 */

void irq_chip_mask_parent(struct irq_data *data)

{

	data = data->parent_data;

	data->chip->irq_mask(data);

}



/**

 * irq_chip_unmask_parent - Unmask the parent interrupt

 * @data:	Pointer to interrupt specific data

 */

void irq_chip_unmask_parent(struct irq_data *data)

{

	data = data->parent_data;

	data->chip->irq_unmask(data);

}



/**

 * irq_chip_eoi_parent - Invoke EOI on the parent interrupt

 * @data:	Pointer to interrupt specific data

 */

void irq_chip_eoi_parent(struct irq_data *data)

{

	data = data->parent_data;

	data->chip->irq_eoi(data);

}



/**

 * irq_chip_set_affinity_parent - Set affinity on the parent interrupt

 * @data:	Pointer to interrupt specific data

 * @dest:	The affinity mask to set

 * @force:	Flag to enforce setting (disable online checks)

 *

 * Conditinal, as the underlying parent chip might not implement it.

 */

int irq_chip_set_affinity_parent(struct irq_data *data,

				 const struct cpumask *dest, bool force)

{

	data = data->parent_data;

	if (data->chip->irq_set_affinity)

		return data->chip->irq_set_affinity(data, dest, force);



	return -ENOSYS;

}



/**

 * irq_chip_retrigger_hierarchy - Retrigger an interrupt in hardware

 * @data:	Pointer to interrupt specific data

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