include/linux/ioport.h: new helper to define common struct resource constructs
Resource definitions that just define start, end and flags =
IORESOURCE_MEM or IORESOURCE_IRQ (with start=end) are quite common. So
introduce a shortcut for them. For completeness add macros for
IORESOURCE_DMA and IORESOURCE_IO, too and also make available a set of
macros to specify named resources of all types which are less common.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index e9bb22c..c2ebfe6 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -109,6 +109,36 @@
/* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */
#define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */
+
+/* helpers to define resources */
+#define DEFINE_RES_NAMED(_start, _size, _name, _flags) \
+ { \
+ .start = (_start), \
+ .end = (_start) + (_size) - 1, \
+ .name = (_name), \
+ .flags = (_flags), \
+ }
+
+#define DEFINE_RES_IO_NAMED(_start, _size, _name) \
+ DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_IO)
+#define DEFINE_RES_IO(_start, _size) \
+ DEFINE_RES_IO_NAMED((_start), (_size), NULL)
+
+#define DEFINE_RES_MEM_NAMED(_start, _size, _name) \
+ DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_MEM)
+#define DEFINE_RES_MEM(_start, _size) \
+ DEFINE_RES_MEM_NAMED((_start), (_size), NULL)
+
+#define DEFINE_RES_IRQ_NAMED(_irq, _name) \
+ DEFINE_RES_NAMED((_irq), 1, (_name), IORESOURCE_IRQ)
+#define DEFINE_RES_IRQ(_irq) \
+ DEFINE_RES_IRQ_NAMED((_irq), NULL)
+
+#define DEFINE_RES_DMA_NAMED(_dma, _name) \
+ DEFINE_RES_NAMED((_dma), 1, (_name), IORESOURCE_DMA)
+#define DEFINE_RES_DMA(_dma) \
+ DEFINE_RES_DMA_NAMED((_dma), NULL)
+
/* PC/ISA/whatever - the normal PC address spaces: IO and memory */
extern struct resource ioport_resource;
extern struct resource iomem_resource;