linux-kernel - [PATCH v2 3/9] irqchip/renesas-rzg2l: Make fwspec variable as pointer in struct rzg2l_irqc

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Message-ID: <20260204180632.249139-4-biju.das.jz@bp.renesas.com>
Date: Wed,  4 Feb 2026 18:06:19 +0000
From: Biju <biju.das.au@...il.com>
To: Thomas Gleixner <tglx@...nel.org>
Cc: Biju Das <biju.das.jz@...renesas.com>,
	linux-kernel@...r.kernel.org,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>,
	Biju Das <biju.das.au@...il.com>,
	linux-renesas-soc@...r.kernel.org
Subject: [PATCH v2 3/9] irqchip/renesas-rzg2l: Make fwspec variable as pointer in struct rzg2l_irqc_priv

From: Biju Das <biju.das.jz@...renesas.com>

The total number of IRQs in RZ/G2L and RZ/G3L SoC are different. The
RZ/G3L has 16 external IRQs where as RZ/G2L has only 8 external IRQ.
Dynamicaly allocate fwspec memory instead of static allocation to support
both SoCs.

Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
---
v1->v2:
 * No change
---
 drivers/irqchip/irq-renesas-rzg2l.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-renesas-rzg2l.c b/drivers/irqchip/irq-renesas-rzg2l.c
index e73d426cea6d..20e2b1c4587b 100644
--- a/drivers/irqchip/irq-renesas-rzg2l.c
+++ b/drivers/irqchip/irq-renesas-rzg2l.c
@@ -79,7 +79,7 @@ struct rzg2l_irqc_reg_cache {
 static struct rzg2l_irqc_priv {
 	void __iomem			*base;
 	const struct irq_chip		*irqchip;
-	struct irq_fwspec		fwspec[IRQC_NUM_IRQ];
+	struct irq_fwspec		*fwspec;
 	raw_spinlock_t			lock;
 	struct rzg2l_irqc_reg_cache	cache;
 } *rzg2l_irqc_data;
@@ -554,6 +554,11 @@ static int rzg2l_irqc_common_probe(struct platform_device *pdev, struct device_n
 	if (IS_ERR(rzg2l_irqc_data->base))
 		return PTR_ERR(rzg2l_irqc_data->base);
 
+	rzg2l_irqc_data->fwspec = devm_kcalloc(&pdev->dev, IRQC_NUM_IRQ,
+					       sizeof(*rzg2l_irqc_data->fwspec), GFP_KERNEL);
+	if (!rzg2l_irqc_data->fwspec)
+		return -ENOMEM;
+
 	ret = rzg2l_irqc_parse_interrupts(rzg2l_irqc_data, node);
 	if (ret)
 		return dev_err_probe(dev, ret, "cannot parse interrupts: %d\n", ret);
-- 
2.43.0