Now we already support hierarchy irq_datas, so introduce several helpers
to support stacked irq_chips.
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
---
include/linux/irq.h | 5 +++++
kernel/irq/chip.c | 18 ++++++++++++++++++
2 files changed, 23 insertions(+)
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 4b74565690ce..bfa027f6814a 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -433,6 +433,11 @@ 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 46bd5e2190c3..b8ee27efde73 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -821,3 +821,21 @@ 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;
+ if (data && data->chip && data->chip->irq_ack)
+ 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
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