[PATCH 06/25] irqchip/apple-aic: Add FW info retrieval support

Marc Zyngier
2025-09-08T16:31:49Z

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

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
drivers/irqchip/irq-apple-aic.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)

diff --git a/drivers/irqchip/irq-apple-aic.c b/drivers/irqchip/irq-apple-aic.c
index 032d66dceb8ec..dd89e50a72e83 100644
--- a/drivers/irqchip/irq-apple-aic.c
+++ b/drivers/irqchip/irq-apple-aic.c
@@ -651,6 +651,36 @@ static int aic_irq_domain_map(struct irq_domain *id, unsigned int irq,
return 0;
}

+static int aic_irq_get_info(struct irq_fwspec_info *info)
+{
+ struct irq_fwspec *fwspec = &info->fwspec;
+ 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_FWSPEC_VALID |
+ 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 +783,7 @@ 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_info = aic_irq_get_info,
};

/*
--
2.39.2