irqchip/ACPI: Introduce ACPI_IRQ_MODEL_LPIC for LoongArch

LoongArch inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I6BWFP

--------------------------------

For LoongArch, ACPI_IRQ_MODEL_LPIC is introduced, and high
level trigger type is set for PCI devices legacy irq.

Change-Id: I5f9d44e2d9c7d3492fedf89b64becac5fb5cc270
Signed-off-by: NJianmin Lv <lvjianmin@loongson.cn>
(cherry picked from commit 2c1c0b0c)

arch/loongarch/kernel/acpi.c

@@ -165,6 +165,7 @@ static void __init acpi_process_madt(void)
 	acpi_table_parse_madt(ACPI_MADT_TYPE_EIO_PIC,
 			acpi_parse_eio_master, MAX_IO_PICS);
 
+	acpi_irq_model = ACPI_IRQ_MODEL_LPIC;
 	loongson_sysconf.nr_cpus = num_processors;
 }
 

drivers/acpi/pci_irq.c

@@ -405,8 +405,14 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
 	 * controller and must therefore be considered active high
 	 * as default.
 	 */
+#ifdef CONFIG_LOONGARCH
+	int polarity = acpi_irq_model == ACPI_IRQ_MODEL_GIC ||
+			acpi_irq_model == ACPI_IRQ_MODEL_LPIC ?
+			ACPI_ACTIVE_HIGH : ACPI_ACTIVE_LOW;
+#else
 	int polarity = acpi_irq_model == ACPI_IRQ_MODEL_GIC ?
 				      ACPI_ACTIVE_HIGH : ACPI_ACTIVE_LOW;
+#endif
 	char *link = NULL;
 	char link_desc[16];
 	int rc;