[patch 27/54] PNP: add pnp_get_resource() interface

Bjorn Helgaas
2008-04-25T18:40:04Z

[-- Attachment #1: pnp-add-get-resource --]
[-- Type: text/plain, Size: 2016 bytes --]

This adds a pnp_get_resource() that works the same way as
platform_get_resource(). This will enable us to consolidate
many pnp_resource_table references in one place, which will
make it easier to make the table dynamic.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>

---
drivers/pnp/resource.c | 27 +++++++++++++++++++++++++++
include/linux/pnp.h | 1 +
2 files changed, 28 insertions(+)

Index: work10/include/linux/pnp.h
===================================================================
--- work10.orig/include/linux/pnp.h 2008-04-25 11:14:59.000000000 -0600
+++ work10/include/linux/pnp.h 2008-04-25 11:15:01.000000000 -0600
@@ -25,6 +25,7 @@
/*
* Resource Management
*/
+struct resource *pnp_get_resource(struct pnp_dev *, unsigned int, unsigned int);

/* Use these instead of directly reading pnp_dev to get resource information */
#define pnp_port_start(dev,bar) ((dev)->res.port_resource[(bar)].start)
Index: work10/drivers/pnp/resource.c
===================================================================
--- work10.orig/drivers/pnp/resource.c 2008-04-25 11:14:55.000000000 -0600
+++ work10/drivers/pnp/resource.c 2008-04-25 11:15:01.000000000 -0600
@@ -487,6 +487,33 @@
#endif
}

+struct resource *pnp_get_resource(struct pnp_dev *dev,
+ unsigned int type, unsigned int num)
+{
+ struct pnp_resource_table *res = &dev->res;
+
+ switch (type) {
+ case IORESOURCE_IO:
+ if (num >= PNP_MAX_PORT)
+ return NULL;
+ return &res->port_resource[num];
+ case IORESOURCE_MEM:
+ if (num >= PNP_MAX_MEM)
+ return NULL;
+ return &res->mem_resource[num];
+ case IORESOURCE_IRQ:
+ if (num >= PNP_MAX_IRQ)
+ return NULL;
+ return &res->irq_resource[num];
+ case IORESOURCE_DMA:
+ if (num >= PNP_MAX_DMA)
+ return NULL;
+ return &res->dma_resource[num];
+ }
+ return NULL;
+}
+EXPORT_SYMBOL(pnp_get_resource);
+
/* format is: pnp_reserve_irq=irq1[,irq2] .... */
static int __init pnp_setup_reserve_irq(char *str)
{

--