[PATCH 1/2] irqchip: loongarch-cpu: add DT support

From: Liu Peibao <liupeibao@loongson.cn>
To: Thomas Gleixner <tglx@linutronix.de>,
	Marc Zyngier <maz@kernel.org>, Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Huacai Chen <chenhuacai@kernel.org>,
	WANG Xuerui <kernel@xen0n.name>
Cc: Jianmin Lv <lvjianmin@loongson.cn>,
	Yinbo Zhu <zhuyinbo@loongson.cn>,
	Liu Peibao <liupeibao@loongson.cn>,
	linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 1/2] irqchip: loongarch-cpu: add DT support
Date: Mon,  7 Nov 2022 10:34:03 +0800	[thread overview]
Message-ID: <20221107023404.26730-1-liupeibao@loongson.cn> (raw)

LoongArch is coming to support booting with FDT, so DT
support of this driver is desired.

Signed-off-by: Liu Peibao <liupeibao@loongson.cn>
---
 drivers/irqchip/irq-loongarch-cpu.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/irqchip/irq-loongarch-cpu.c b/drivers/irqchip/irq-loongarch-cpu.c
index 741612ba6a52..a28b7c549654 100644
--- a/drivers/irqchip/irq-loongarch-cpu.c
+++ b/drivers/irqchip/irq-loongarch-cpu.c
@@ -92,6 +92,25 @@ static const struct irq_domain_ops loongarch_cpu_intc_irq_domain_ops = {
 	.xlate = irq_domain_xlate_onecell,
 };
 
+#ifdef CONFIG_OF
+int __init loongarch_cpu_irq_of_init(struct device_node *of_node,
+				struct device_node *parent)
+{
+	cpuintc_handle = of_node_to_fwnode(of_node);
+
+	irq_domain = irq_domain_create_linear(cpuintc_handle, EXCCODE_INT_NUM,
+				&loongarch_cpu_intc_irq_domain_ops, NULL);
+	if (!irq_domain)
+		panic("Failed to add irqdomain for loongarch CPU");
+
+	set_handle_irq(&handle_cpu_irq);
+
+	return 0;
+}
+IRQCHIP_DECLARE(cpu_intc, "loongson,cpu-interrupt-controller",
+					loongarch_cpu_irq_of_init);
+#endif
+
 static int __init
 liointc_parse_madt(union acpi_subtable_headers *header,
 		       const unsigned long end)
-- 
2.20.1

