Add helper irq_chip_startup_parent and irq_chip_shutdown_parent. The
helper implement the default behavior in case irq_startup or irq_shutdown
is not implemented for the parent interrupt chip, which will fallback
to irq_chip_enable_parent or irq_chip_disable_parent if not available.
Suggested-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Inochi Amaoto <inochiama@xxxxxxxxx>
---
include/linux/irq.h | 2 ++
kernel/irq/chip.c | 37 +++++++++++++++++++++++++++++++++++++
2 files changed, 39 insertions(+)
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 1d6b606a81ef..890e1371f5d4 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -669,6 +669,8 @@ extern int irq_chip_set_parent_state(struct irq_data *data,
extern int irq_chip_get_parent_state(struct irq_data *data,
enum irqchip_irq_state which,
bool *state);
+extern void irq_chip_shutdown_parent(struct irq_data *data);
+extern unsigned int irq_chip_startup_parent(struct irq_data *data);
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);
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 0d0276378c70..3ffa0d80ddd1 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -1259,6 +1259,43 @@ int irq_chip_get_parent_state(struct irq_data *data,
}
EXPORT_SYMBOL_GPL(irq_chip_get_parent_state);
+/**
+ * irq_chip_shutdown_parent - Shutdown the parent interrupt
+ * @data: Pointer to interrupt specific data
+ *
+ * Invokes the irq_shutdown() callback of the parent if available or falls
+ * back to irq_chip_disable_parent().
+ */
+void irq_chip_shutdown_parent(struct irq_data *data)
+{
+ struct irq_data *parent = data->parent_data;
+
+ if (parent->chip->irq_shutdown)
+ parent->chip->irq_shutdown(parent);
+ else
+ irq_chip_disable_parent(data);
+}
+EXPORT_SYMBOL_GPL(irq_chip_shutdown_parent);
+
+/**
+ * irq_chip_startup_parent - Startup the parent interrupt
+ * @data: Pointer to interrupt specific data
+ *
+ * Invokes the irq_startup() callback of the parent if available or falls
+ * back to irq_chip_enable_parent().
+ */
+unsigned int irq_chip_startup_parent(struct irq_data *data)
+{
+ struct irq_data *parent = data->parent_data;
+
+ if (parent->chip->irq_startup)
+ return parent->chip->irq_startup(parent);
+
+ irq_chip_enable_parent(data);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(irq_chip_startup_parent);
+
/**
* irq_chip_enable_parent - Enable the parent interrupt (defaults to unmask if
* NULL)
--
2.50.1
