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

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Message-ID: <176158267649.2601451.3798748291516107234.tip-bot2@tip-bot2>
Date: Mon, 27 Oct 2025 16:31:16 -0000
From: "tip-bot2 for Marc Zyngier" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Marc Zyngier <maz@...nel.org>, Thomas Gleixner <tglx@...utronix.de>,
 Will Deacon <will@...nel.org>, Sven Peter <sven@...nel.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: irq/core] irqchip/apple-aic: Add FW info retrieval support

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@...nel.org>
AuthorDate:    Mon, 20 Oct 2025 13:29:23 +01:00
Committer:     Thomas Gleixner <tglx@...utronix.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@...nel.org>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Tested-by: Will Deacon <will@...nel.org>
Acked-by: Sven Peter <sven@...nel.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,
 };
 
 /*