From 7a721a2fee2bce01af26699a87739db8ca8ea3c8 Mon Sep 17 00:00:00 2001 From: Inochi Amaoto Date: Thu, 14 Aug 2025 07:28:31 +0800 Subject: genirq: Add irq_chip_(startup/shutdown)_parent() As the MSI controller on SG2044 uses PLIC as the underlying interrupt controller, it needs to call irq_enable() and irq_disable() to startup/shutdown interrupts. Otherwise, the MSI interrupt can not be startup correctly and will not respond any incoming interrupt. Introduce irq_chip_startup_parent() and irq_chip_shutdown_parent() to allow the interrupt controller to call the irq_startup()/irq_shutdown() callbacks of the parent interrupt chip. In case the irq_startup()/irq_shutdown() callbacks are not implemented for the parent interrupt chip, this will fallback to irq_chip_enable_parent() or irq_chip_disable_parent(). Suggested-by: Thomas Gleixner Signed-off-by: Inochi Amaoto Signed-off-by: Thomas Gleixner Tested-by: Chen Wang # Pioneerbox Reviewed-by: Chen Wang Link: https://lore.kernel.org/all/20250813232835.43458-2-inochiama@gmail.com Link: https://lore.kernel.org/lkml/20250722224513.22125-1-inochiama@gmail.com/ --- include/linux/irq.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/irq.h b/include/linux/irq.h index c9bcdbf6bc63..c67e76fbcc07 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); -- cgit v1.2.3