x86: irq: Support flags for acpi_gpe

This binding currently has a flags cell but it is not used. Make use of it
to create ACPI tables for interrupts.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>
Reviewed-by: NWolfgang Wallner <wolfgang.wallner@br-automation.com>

arch/x86/cpu/acpi_gpe.c

@@ -8,7 +8,10 @@
 #include <dm.h>
 #include <irq.h>
 #include <log.h>
+#include <acpi/acpi_device.h>
 #include <asm/io.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/interrupt-controller/x86-irq.h>
 
 /**
  * struct acpi_gpe_priv - private driver information
@@ -62,13 +65,36 @@ static int acpi_gpe_ofdata_to_platdata(struct udevice *dev)
 static int acpi_gpe_of_xlate(struct irq *irq, struct ofnode_phandle_args *args)
 {
 	irq->id = args->args[0];
+	irq->flags = args->args[1];
 
 	return 0;
 }
 
+#if CONFIG_IS_ENABLED(ACPIGEN)
+static int acpi_gpe_get_acpi(const struct irq *irq, struct acpi_irq *acpi_irq)
+{
+	memset(acpi_irq, '\0', sizeof(*acpi_irq));
+	acpi_irq->pin = irq->id;
+	acpi_irq->mode = irq->flags & IRQ_TYPE_EDGE_BOTH ?
+		ACPI_IRQ_EDGE_TRIGGERED : ACPI_IRQ_LEVEL_TRIGGERED;
+	acpi_irq->polarity = irq->flags &
+		 (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW) ?
+		 ACPI_IRQ_ACTIVE_LOW : ACPI_IRQ_ACTIVE_HIGH;
+	acpi_irq->shared = irq->flags & X86_IRQ_TYPE_SHARED ?
+		ACPI_IRQ_SHARED : ACPI_IRQ_EXCLUSIVE;
+	acpi_irq->wake = irq->flags & X86_IRQ_TYPE_WAKE ? ACPI_IRQ_WAKE :
+		ACPI_IRQ_NO_WAKE;
+
+	return 0;
+}
+#endif
+
 static const struct irq_ops acpi_gpe_ops = {
 	.read_and_clear		= acpi_gpe_read_and_clear,
 	.of_xlate		= acpi_gpe_of_xlate,
+#if CONFIG_IS_ENABLED(ACPIGEN)
+	.get_acpi		= acpi_gpe_get_acpi,
+#endif
 };
 
 static const struct udevice_id acpi_gpe_ids[] = {

include/dt-bindings/interrupt-controller/x86-irq.h

+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 2019 Google LLC
+ *
+ * This provides additional flags used by x86.
+ */
+
+#ifndef _DT_BINDINGS_INTERRUPT_CONTROLLER_X86_IRQ_H
+#define _DT_BINDINGS_INTERRUPT_CONTROLLER_X86_IRQ_H
+
+#define X86_IRQ_TYPE_SHARED	(1 << 4)
+#define X86_IRQ_TYPE_WAKE	(1 << 5)
+
+#endif