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Subject[PATCH 1/4] mod_devicetable: helper macro for declaring oftree module device table
Date
Little helper macros that declares an oftree module device table,
if CONFIG_OF is enabled. Otherwise it's just noop. Helpful for
reducing the number of #ifdef's.

Instead of:
MODULE_DEVICE_TABLE(of, foo);
now use:
MODULE_OF_TABLE(foo);

Or declare the whole table via:
MODULE_DECLARE_OF_TABLE(foo,
{ .compatible = "foo" },
{ .compatible = "bar" });

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
---
include/linux/mod_devicetable.h | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 448621c..5f4f2dc8 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -245,6 +245,19 @@ struct of_device_id {
const void *data;
};

+/*
+ * macro for adding the of module device table only if CONFIG_OF enabled
+ */
+#ifdef CONFIG_OF
+#define MODULE_OF_TABLE(name) MODULE_DEVICE_TABLE(of,name)
+#define MODULE_DECLARE_OF_TABLE(name,entries...) \
+static const struct of_device_id name[] = { entries, {} };
+#else
+#define MODULE_OF_TABLE(name)
+#define MODULE_DECLARE_OF_TABLE(name,entries...) \
+static const struct of_device_id *name = NULL;
+#endif /* CONFIG_OF */
+
/* VIO */
struct vio_device_id {
char type[32];
--
1.9.1
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