linux-kernel - [PATCH 2/4] irqchip/sg2042-msi: Set irq type according to DT configuration

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Message-Id: <cf73d95140b03b586f44d2495376d367e32857ed.1756103516.git.unicorn_wang@outlook.com>
Date: Mon, 25 Aug 2025 14:55:50 +0800
From: Chen Wang <unicornxw@...il.com>
To: u.kleine-koenig@...libre.com,
	aou@...s.berkeley.edu,
	unicorn_wang@...look.com,
	conor+dt@...nel.org,
	inochiama@...il.com,
	krzk+dt@...nel.org,
	looong.bin@...il.com,
	palmer@...belt.com,
	paul.walmsley@...ive.com,
	robh@...nel.org,
	tglx@...utronix.de,
	sycamoremoon376@...il.com,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	sophgo@...ts.linux.dev
Subject: [PATCH 2/4] irqchip/sg2042-msi: Set irq type according to DT configuration

From: Chen Wang <unicorn_wang@...look.com>

The original MSI interrupt type was hard-coded, which was not a good idea.
Now it is changed to read the device tree configuration and then set the
interrupt type.

Signed-off-by: Chen Wang <unicorn_wang@...look.com>
---
 drivers/irqchip/irq-sg2042-msi.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-sg2042-msi.c b/drivers/irqchip/irq-sg2042-msi.c
index 5249afd93b4a..be47c038386c 100644
--- a/drivers/irqchip/irq-sg2042-msi.c
+++ b/drivers/irqchip/irq-sg2042-msi.c
@@ -30,6 +30,7 @@ struct sg204x_msi_chip_info {
  * @doorbell_addr:	see TRM, 10.1.32, GP_INTR0_SET
  * @irq_first:		First vectors number that MSIs starts
  * @num_irqs:		Number of vectors for MSIs
+ * @irq_type:		IRQ type for MSIs
  * @msi_map:		mapping for allocated MSI vectors.
  * @msi_map_lock:	Lock for msi_map
  * @chip_info:		chip specific infomations
@@ -41,6 +42,7 @@ struct sg204x_msi_chipdata {
 
 	u32					irq_first;
 	u32					num_irqs;
+	unsigned int				irq_type;
 
 	unsigned long				*msi_map;
 	struct mutex				msi_map_lock;
@@ -137,14 +139,14 @@ static int sg204x_msi_parent_domain_alloc(struct irq_domain *domain, unsigned in
 	fwspec.fwnode = domain->parent->fwnode;
 	fwspec.param_count = 2;
 	fwspec.param[0] = data->irq_first + hwirq;
-	fwspec.param[1] = IRQ_TYPE_EDGE_RISING;
+	fwspec.param[1] = data->irq_type;
 
 	ret = irq_domain_alloc_irqs_parent(domain, virq, 1, &fwspec);
 	if (ret)
 		return ret;
 
 	d = irq_domain_get_irq_data(domain->parent, virq);
-	return d->chip->irq_set_type(d, IRQ_TYPE_EDGE_RISING);
+	return d->chip->irq_set_type(d, data->irq_type);
 }
 
 static int sg204x_msi_middle_domain_alloc(struct irq_domain *domain, unsigned int virq,
@@ -290,6 +292,7 @@ static int sg2042_msi_probe(struct platform_device *pdev)
 	}
 
 	data->irq_first = (u32)args.args[0];
+	data->irq_type = (unsigned int)args.args[1];
 	data->num_irqs = (u32)args.args[2];
 
 	mutex_init(&data->msi_map_lock);
-- 
2.34.1