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authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2011-07-25 17:13:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-07-25 20:57:14 -0700
commita0e44d4a7a3935afe425ec8dd1a5b63895e1f9c3 (patch)
treeef31b7fe165d9777e93beacb191adbef280c21b6
parentae891a1b93bf62e9aaa116a7a71312375047fc9f (diff)
downloadop-kernel-dev-a0e44d4a7a3935afe425ec8dd1a5b63895e1f9c3.zip
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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>
-rw-r--r--include/linux/ioport.h30
1 files changed, 30 insertions, 0 deletions
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 @@ struct resource_list {
/* 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;
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