resources: Document IORESOURCE_IO
Help clarify that this is specifically for PCI/ISA I/O ports and not for
any other similar thing.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Tested-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index bfee885..85ac9b9b 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -29,7 +29,7 @@
#define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */
#define IORESOURCE_TYPE_BITS 0x00001f00 /* Resource type */
-#define IORESOURCE_IO 0x00000100
+#define IORESOURCE_IO 0x00000100 /* PCI/ISA I/O ports */
#define IORESOURCE_MEM 0x00000200
#define IORESOURCE_REG 0x00000300 /* Register offsets */
#define IORESOURCE_IRQ 0x00000400