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resource: add resource_type() and IORESOURCE_TYPE_BITS

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Add resource_type() and IORESOURCE_TYPE_BITS.  They make it easier to add
more resource types without having to rewrite tons of code.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Magnus Damm 2008-10-15 22:05:15 -07:00 committed by Linus Torvalds
parent c26ec88ea8
commit c9f66169f1
2 changed files with 23 additions and 15 deletions
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31
drivers/base/platform.c
View File

@ -42,10 +42,8 @@ struct resource *platform_get_resource(struct platform_device *dev,
for (i = 0; i < dev->num_resources; i++) {
struct resource *r = &dev->resource[i];
if ((r->flags & (IORESOURCE_IO|IORESOURCE_MEM|
IORESOURCE_IRQ|IORESOURCE_DMA)) == type)
if (num-- == 0)
return r;
if (type == resource_type(r) && num-- == 0)
return r;
}
return NULL;
}
@ -78,10 +76,8 @@ struct resource *platform_get_resource_byname(struct platform_device *dev,
for (i = 0; i < dev->num_resources; i++) {
struct resource *r = &dev->resource[i];
if ((r->flags & (IORESOURCE_IO|IORESOURCE_MEM|
IORESOURCE_IRQ|IORESOURCE_DMA)) == type)
if (!strcmp(r->name, name))
return r;
if (type == resource_type(r) && !strcmp(r->name, name))
return r;
}
return NULL;
}
@ -259,9 +255,9 @@ int platform_device_add(struct platform_device *pdev)
p = r->parent;
if (!p) {
if (r->flags & IORESOURCE_MEM)
if (resource_type(r) == IORESOURCE_MEM)
p = &iomem_resource;
else if (r->flags & IORESOURCE_IO)
else if (resource_type(r) == IORESOURCE_IO)
p = &ioport_resource;
}
@ -282,9 +278,14 @@ int platform_device_add(struct platform_device *pdev)
return ret;
failed:
while (--i >= 0)
if (pdev->resource[i].flags & (IORESOURCE_MEM|IORESOURCE_IO))
release_resource(&pdev->resource[i]);
while (--i >= 0) {
struct resource *r = &pdev->resource[i];
unsigned long type = resource_type(r);
if (type == IORESOURCE_MEM || type == IORESOURCE_IO)
release_resource(r);
}
return ret;
}
EXPORT_SYMBOL_GPL(platform_device_add);
@ -306,7 +307,9 @@ void platform_device_del(struct platform_device *pdev)
for (i = 0; i < pdev->num_resources; i++) {
struct resource *r = &pdev->resource[i];
if (r->flags & (IORESOURCE_MEM|IORESOURCE_IO))
unsigned long type = resource_type(r);
if (type == IORESOURCE_MEM || type == IORESOURCE_IO)
release_resource(r);
}
}

7
include/linux/ioport.h
View File

@ -34,7 +34,8 @@ struct resource_list {
*/
#define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */
#define IORESOURCE_IO 0x00000100 /* Resource type */
#define IORESOURCE_TYPE_BITS 0x00000f00 /* Resource type */
#define IORESOURCE_IO 0x00000100
#define IORESOURCE_MEM 0x00000200
#define IORESOURCE_IRQ 0x00000400
#define IORESOURCE_DMA 0x00000800
@ -126,6 +127,10 @@ static inline resource_size_t resource_size(struct resource *res)
{
return res->end - res->start + 1;
}
static inline unsigned long resource_type(struct resource *res)
{
return res->flags & IORESOURCE_TYPE_BITS;
}
/* Convenience shorthand with allocation */
#define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name))