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Subject[PATCH v2] new helper to define common struct resource constructs
Date
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.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
changes since v1:
- also add _IO and _DMA variants
include/linux/ioport.h | 30 ++++++++++++++++++++++++++++++
1 files changed, 30 insertions(+), 0 deletions(-)
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 63eb429..f98124f 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;
--
1.7.5.4
--
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