drivers: pcie: add prt support for pci legacy interrupt

add support for obtain irq number from pci irq routing table

Signed-off-by: Najumon Ba <[email protected]>

drivers/pcie/host/pcie.c

@@ -14,6 +14,7 @@ LOG_MODULE_REGISTER(pcie, LOG_LEVEL_ERR);
 #include <stdbool.h>
 #include <zephyr/drivers/pcie/pcie.h>
 #include <zephyr/sys/iterable_sections.h>
+#include <zephyr/acpi/acpi.h>
 
 #if CONFIG_PCIE_MSI
 #include <zephyr/drivers/pcie/msi.h>
@@ -285,7 +286,13 @@ unsigned int pcie_alloc_irq(pcie_bdf_t bdf)
 	if (irq == PCIE_CONF_INTR_IRQ_NONE ||
 	    irq >= CONFIG_MAX_IRQ_LINES ||
 	    arch_irq_is_used(irq)) {
-		irq = arch_irq_allocate();
+
+		if (IS_ENABLED(CONFIG_ACPI)) {
+			irq = acpi_legacy_irq_get(bdf);
+		} else {
+			irq = arch_irq_allocate();
+		}
+
 		if (irq == UINT_MAX) {
 			return PCIE_CONF_INTR_IRQ_NONE;
 		}