1 files changed, 88 insertions, 0 deletions
diff --git a/include/linux/irqchip.h b/include/linux/irqchip.h
new file mode 100644
index 000000000..d5e6024cb
--- /dev/null
+++ b/include/linux/irqchip.h
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2012 Thomas Petazzoni
+ *
+ * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef _LINUX_IRQCHIP_H
+#define _LINUX_IRQCHIP_H
+
+#include <linux/acpi.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+
+/* Undefined on purpose */
+extern of_irq_init_cb_t typecheck_irq_init_cb;
+
+#define typecheck_irq_init_cb(fn)					\
+	(__typecheck(typecheck_irq_init_cb, &fn) ? fn : fn)
+
+/*
+ * This macro must be used by the different irqchip drivers to declare
+ * the association between their DT compatible string and their
+ * initialization function.
+ *
+ * @name: name that must be unique across all IRQCHIP_DECLARE of the
+ * same file.
+ * @compat: compatible string of the irqchip driver
+ * @fn: initialization function
+ */
+#define IRQCHIP_DECLARE(name, compat, fn)	\
+	OF_DECLARE_2(irqchip, name, compat, typecheck_irq_init_cb(fn))
+
+extern int platform_irqchip_probe(struct platform_device *pdev);
+
+#define IRQCHIP_PLATFORM_DRIVER_BEGIN(drv_name) \
+static const struct of_device_id drv_name##_irqchip_match_table[] = {
+
+#define IRQCHIP_MATCH(compat, fn) { .compatible = compat,		\
+				    .data = typecheck_irq_init_cb(fn), },
+
+
+#define IRQCHIP_PLATFORM_DRIVER_END(drv_name, ...)			\
+	{},								\
+};									\
+MODULE_DEVICE_TABLE(of, drv_name##_irqchip_match_table);		\
+static struct platform_driver drv_name##_driver = {			\
+	.probe  = IS_ENABLED(CONFIG_IRQCHIP) ? 				\
+			platform_irqchip_probe : NULL,			\
+	.driver = {							\
+		.name = #drv_name,					\
+		.owner = THIS_MODULE,					\
+		.of_match_table = drv_name##_irqchip_match_table,	\
+		.suppress_bind_attrs = true,				\
+		__VA_ARGS__						\
+	},								\
+};									\
+builtin_platform_driver(drv_name##_driver)
+
+/*
+ * This macro must be used by the different irqchip drivers to declare
+ * the association between their version and their initialization function.
+ *
+ * @name: name that must be unique across all IRQCHIP_ACPI_DECLARE of the
+ * same file.
+ * @subtable: Subtable to be identified in MADT
+ * @validate: Function to be called on that subtable to check its validity.
+ *            Can be NULL.
+ * @data: data to be checked by the validate function.
+ * @fn: initialization function
+ */
+#define IRQCHIP_ACPI_DECLARE(name, subtable, validate, data, fn)	\
+	ACPI_DECLARE_SUBTABLE_PROBE_ENTRY(irqchip, name,		\
+					  ACPI_SIG_MADT, subtable,	\
+					  validate, data, fn)
+
+#ifdef CONFIG_IRQCHIP
+void irqchip_init(void);
+#else
+static inline void irqchip_init(void) {}
+#endif
+
+#endif