[tip: irq/core] irqchip/apple-aic: Add FW info retrieval support

tip-bot2 for Marc Zyngier
2025-10-27T16:31:19Z

The following commit has been merged into the irq/core branch of tip:

Commit-ID: de575de83c77b693667256774f4d19f33e73f6db
Gitweb: https://git.kernel.org/tip/de575de83c77b693667256774f4d19f33e73f6db
Author: Marc Zyngier <maz@kernel.org>
AuthorDate: Mon, 20 Oct 2025 13:29:23 +01:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Mon, 27 Oct 2025 17:16:33 +01:00

irqchip/apple-aic: Add FW info retrieval support

Plug the new .get_fwspec_info() callback into the Apple AIC driver, using
some of the existing FIQ affinity handling infrastructure.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Will Deacon <will@kernel.org>
Acked-by: Sven Peter <sven@kernel.org>
Link: https://patch.msgid.link/20251020122944.3074811-7-maz@kernel.org
---
drivers/irqchip/irq-apple-aic.c | 34 +++++++++++++++++++++++++++++---
1 file changed, 31 insertions(+), 3 deletions(-)

diff --git a/drivers/irqchip/irq-apple-aic.c b/drivers/irqchip/irq-apple-aic.c
index 032d66d..0b72451 100644
--- a/drivers/irqchip/irq-apple-aic.c
+++ b/drivers/irqchip/irq-apple-aic.c
@@ -651,6 +651,33 @@ static int aic_irq_domain_map(struct irq_domain *id, unsigned int irq,
return 0;
}

+static int aic_irq_get_fwspec_info(struct irq_fwspec *fwspec, struct irq_fwspec_info *info)
+{
+ const struct cpumask *mask;
+ u32 intid;
+
+ info->flags = 0;
+ info->affinity = NULL;
+
+ if (fwspec->param[0] != AIC_FIQ)
+ return 0;
+
+ if (fwspec->param_count == 3)
+ intid = fwspec->param[1];
+ else
+ intid = fwspec->param[2];
+
+ if (aic_irqc->fiq_aff[intid])
+ mask = &aic_irqc->fiq_aff[intid]->aff;
+ else
+ mask = cpu_possible_mask;
+
+ info->affinity = mask;
+ info->flags = IRQ_FWSPEC_INFO_AFFINITY_VALID;
+
+ return 0;
+}
+
static int aic_irq_domain_translate(struct irq_domain *id,
struct irq_fwspec *fwspec,
unsigned long *hwirq,
@@ -750,9 +777,10 @@ static void aic_irq_domain_free(struct irq_domain *domain, unsigned int virq,
}

static const struct irq_domain_ops aic_irq_domain_ops = {
- .translate = aic_irq_domain_translate,
- .alloc = aic_irq_domain_alloc,
- .free = aic_irq_domain_free,
+ .translate = aic_irq_domain_translate,
+ .alloc = aic_irq_domain_alloc,
+ .free = aic_irq_domain_free,
+ .get_fwspec_info = aic_irq_get_fwspec_info,
};

/*