[PATCH v4 06/26] irqchip/apple-aic: Add FW info retrieval support

Marc Zyngier
2025-10-20T12:30:11Z

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

Acked-by: Sven Peter <sven@kernel.org>
Tested-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
drivers/irqchip/irq-apple-aic.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)

diff --git a/drivers/irqchip/irq-apple-aic.c b/drivers/irqchip/irq-apple-aic.c
index 032d66dceb8ec..cb8b6f40ce8d3 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,
@@ -753,6 +780,7 @@ 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,
+ .get_fwspec_info = aic_irq_get_fwspec_info,
};

/*
--
2.47.3