resource: add bus number support

Add support for bus number resources. This is for bridges with a range of bus numbers behind them. Signed-off-by: Bjorn Helgaas <[email protected]> Signed-off-by: Len Brown <[email protected]>
nate1217 · Mar 15, 2010 · 0f4050c · 0f4050c
1 parent cd7e9fc
commit 0f4050c
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Showing 2 changed files with 10 additions and 0 deletions.
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
@@ -39,6 +39,7 @@ struct resource_list {
 #define IORESOURCE_MEM		0x00000200
 #define IORESOURCE_IRQ		0x00000400
 #define IORESOURCE_DMA		0x00000800
+#define IORESOURCE_BUS		0x00001000
 
 #define IORESOURCE_PREFETCH	0x00002000	/* No side effects */
 #define IORESOURCE_READONLY	0x00004000

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
@@ -609,6 +609,12 @@ static char *resource_string(char *buf, char *end, struct resource *res,
 		.precision = -1,
 		.flags = SPECIAL | SMALL | ZEROPAD,
 	};
+	static const struct printf_spec bus_spec = {
+		.base = 16,
+		.field_width = 2,
+		.precision = -1,
+		.flags = SMALL | ZEROPAD,
+	};
 	static const struct printf_spec dec_spec = {
 		.base = 10,
 		.precision = -1,
@@ -651,6 +657,9 @@ static char *resource_string(char *buf, char *end, struct resource *res,
 	} else if (res->flags & IORESOURCE_DMA) {
 		p = string(p, pend, "dma ", str_spec);
 		specp = &dec_spec;
+	} else if (res->flags & IORESOURCE_BUS) {
+		p = string(p, pend, "bus ", str_spec);
+		specp = &bus_spec;
 	} else {
 		p = string(p, pend, "??? ", str_spec);
 		specp = &mem_spec;