[Patch Part2 v4 03/31] genirq: Introduce helper functions to support stacked irq_chip
From: Jiang Liu <hidden>
Date: 2014-11-04 11:59:40
Also in:
linux-acpi, linux-pci, lkml
Subsystem:
irq subsystem, the rest · Maintainers:
Thomas Gleixner, Linus Torvalds
Now we already support hierarchy irq_data, so introduce several helpers to support stacked irq_chips. Signed-off-by: Jiang Liu <redacted> --- include/linux/irq.h | 5 +++++ kernel/irq/chip.c | 17 +++++++++++++++++ 2 files changed, 22 insertions(+)
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 13ba412ce3a0..0adcbbbf2e87 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h@@ -443,6 +443,11 @@ extern void handle_percpu_devid_irq(unsigned int irq, struct irq_desc *desc); extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc); 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); +#endif + /* Handling of unhandled and spurious interrupts: */ extern void note_interrupt(unsigned int irq, struct irq_desc *desc, irqreturn_t action_ret);
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 72a93086216b..12f3e72449eb 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c@@ -850,3 +850,20 @@ void irq_cpu_offline(void) raw_spin_unlock_irqrestore(&desc->lock, flags); } } + +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY +void irq_chip_ack_parent(struct irq_data *data) +{ + data = data->parent_data; + data->chip->irq_ack(data); +} + +int irq_chip_retrigger_hierarchy(struct irq_data *data) +{ + for (data = data->parent_data; data; data = data->parent_data) + if (data->chip && data->chip->irq_retrigger) + return data->chip->irq_retrigger(data); + + return -ENOSYS; +} +#endif
--
1.7.10.4