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

diff --git a/drivers/irqchip/irq-apple-aic.c b/drivers/irqchip/irq-apple-aic.c
index 032d66dceb8ec4ecea606bba1649e41ff68684ad..0b72451725ebd2f8fa6843ffa3b0217d06f5492e 100644 (file)
--- 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,
 };
 
 /*