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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: Yingjoe 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: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Yingjoe Chen 2014-11-13 23:37:05 +08:00 committed by Thomas Gleixner
parent 85f08c17de
commit 56e8abab61
2 changed files with 54 additions and 0 deletions
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6
include/linux/irq.h
View File

@ -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: */

48
kernel/irq/chip.c
View File

@ -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