[irqchip: irq/irqchip-next] irqchip: loongarch-cpu: add DT support

[irqchip-bot for Liu Peibao]

The following commit has been merged into the irq/irqchip-next branch of irqchip:

Commit-ID:     855d4ca4bdb366aab3d43408b74e02ab629d1d55
Gitweb:        https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms/855d4ca4bdb366aab3d43408b74e02ab629d1d55
Author:        Liu Peibao <liupeibao@xxxxxxxxxxx>
AuthorDate:    Mon, 14 Nov 2022 19:38:23 +08:00
Committer:     Marc Zyngier <maz@xxxxxxxxxx>
CommitterDate: Sat, 26 Nov 2022 11:54:11 

irqchip: loongarch-cpu: add DT support

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

Signed-off-by: Liu Peibao <liupeibao@xxxxxxxxxxx>
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20221114113824.1880-2-liupeibao@xxxxxxxxxxx
---
 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 741612b..a28b7c5 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)