linux-kernel - [PATCH v3 3/4] irqchip/sg2042-msi: introduce configurable chipinfo for sg2042

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Message-ID: <20250408050147.774987-4-inochiama@gmail.com>
Date: Tue,  8 Apr 2025 13:01:44 +0800
From: Inochi Amaoto <inochiama@...il.com>
To: Thomas Gleixner <tglx@...utronix.de>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Chen Wang <unicorn_wang@...look.com>,
	Inochi Amaoto <inochiama@...il.com>
Cc: linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	sophgo@...ts.linux.dev,
	Yixun Lan <dlan@...too.org>,
	Longbin Li <looong.bin@...il.com>
Subject: [PATCH v3 3/4] irqchip/sg2042-msi: introduce configurable chipinfo for sg2042

As the controller on SG2044 uses different msi_parent_ops and irq_chip,
it is necessary to add a structure to hold the configuration across
controllers.

Add the chipinfo structure and implement necessary logic for it.

Signed-off-by: Inochi Amaoto <inochiama@...il.com>
---
 drivers/irqchip/irq-sg2042-msi.c | 44 ++++++++++++++++++++++++++------
 1 file changed, 36 insertions(+), 8 deletions(-)

diff --git a/drivers/irqchip/irq-sg2042-msi.c b/drivers/irqchip/irq-sg2042-msi.c
index c9bff7ba693d..30a1d2bfd474 100644
--- a/drivers/irqchip/irq-sg2042-msi.c
+++ b/drivers/irqchip/irq-sg2042-msi.c
@@ -21,16 +21,33 @@
 
 #define SG2042_MAX_MSI_VECTOR	32
 
+struct sg204x_msi_chip_info {
+	const struct irq_chip		*irqchip;
+	const struct msi_parent_ops	*parent_ops;
+};
+
+/**
+ * struct sg204x_msi_chipdata - chip data for the SG204x MSI IRQ controller
+ * @reg_clr:		clear reg, see TRM, 10.1.33, GP_INTR0_CLR
+ * @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
+ * @msi_map:		mapping for allocated MSI vectors.
+ * @msi_map_lock:	Lock for msi_map
+ * @chip_info:		chip specific infomations
+ */
 struct sg204x_msi_chipdata {
-	void __iomem	*reg_clr;	// clear reg, see TRM, 10.1.33, GP_INTR0_CLR
+	void __iomem				*reg_clr;
 
-	phys_addr_t	doorbell_addr;	// see TRM, 10.1.32, GP_INTR0_SET
+	phys_addr_t				doorbell_addr;
 
-	u32		irq_first;	// The vector number that MSIs starts
-	u32		num_irqs;	// The number of vectors for MSIs
+	u32					irq_first;
+	u32					num_irqs;
 
 	DECLARE_BITMAP(msi_map, SG2042_MAX_MSI_VECTOR);
-	struct mutex	msi_map_lock;	// lock for msi_map
+	struct mutex				msi_map_lock;
+
+	const struct sg204x_msi_chip_info	*chip_info;
 };
 
 static int sg204x_msi_allocate_hwirq(struct sg204x_msi_chipdata *data, int num_req)
@@ -115,7 +132,7 @@ static int sg204x_msi_middle_domain_alloc(struct irq_domain *domain, unsigned in
 			goto err_hwirq;
 
 		irq_domain_set_hwirq_and_chip(domain, virq + i, hwirq + i,
-					      &sg2042_msi_middle_irq_chip, data);
+					      data->chip_info->irqchip, data);
 	}
 
 	return 0;
@@ -174,7 +191,7 @@ static int sg204x_msi_init_domains(struct sg204x_msi_chipdata *data,
 	irq_domain_update_bus_token(middle_domain, DOMAIN_BUS_NEXUS);
 
 	middle_domain->flags |= IRQ_DOMAIN_FLAG_MSI_PARENT;
-	middle_domain->msi_parent_ops = &sg2042_msi_parent_ops;
+	middle_domain->msi_parent_ops = data->chip_info->parent_ops;
 
 	return 0;
 }
@@ -192,6 +209,12 @@ static int sg2042_msi_probe(struct platform_device *pdev)
 	if (!data)
 		return -ENOMEM;
 
+	data->chip_info = device_get_match_data(&pdev->dev);
+	if (!data->chip_info) {
+		dev_err(&pdev->dev, "Failed to get irqchip\n");
+		return -EINVAL;
+	}
+
 	data->reg_clr = devm_platform_ioremap_resource_byname(pdev, "clr");
 	if (IS_ERR(data->reg_clr)) {
 		dev_err(dev, "Failed to map clear register\n");
@@ -235,8 +258,13 @@ static int sg2042_msi_probe(struct platform_device *pdev)
 	return sg204x_msi_init_domains(data, plic_domain, dev);
 }
 
+static const struct sg204x_msi_chip_info sg2042_chip_info = {
+	.irqchip	= &sg2042_msi_middle_irq_chip,
+	.parent_ops	= &sg2042_msi_parent_ops,
+};
+
 static const struct of_device_id sg2042_msi_of_match[] = {
-	{ .compatible	= "sophgo,sg2042-msi" },
+	{ .compatible	= "sophgo,sg2042-msi", .data	= &sg2042_chip_info },
 	{ }
 };
 
-- 
2.49.0