summaryrefslogtreecommitdiffstats
path: root/drivers/of
diff options
context:
space:
mode:
authorGrant Likely <grant.likely@secretlab.ca>2010-06-08 07:48:09 -0600
committerGrant Likely <grant.likely@secretlab.ca>2010-07-05 16:14:26 -0600
commit1f5bef30cf6c66f097ea5dfc580a41924df888d1 (patch)
tree345d9db4b6b20de814599cb7129005abd945ceea /drivers/of
parent6b884a8d50a6eea2fb3dad7befe748f67193073b (diff)
of/address: merge of_address_to_resource()
Merge common code between PowerPC and Microblaze. This patch also moves the prototype of pci_address_to_pio() out of pci-bridge.h and into prom.h because the only user of pci_address_to_pio() is of_address_to_resource(). Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Michal Simek <monstr@monstr.eu> CC: Stephen Rothwell <sfr@canb.auug.org.au>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/address.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/of/address.c b/drivers/of/address.c
index 258528d6c4f..c3819550f90 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -3,6 +3,57 @@
#include <linux/ioport.h>
#include <linux/of_address.h>
+int __of_address_to_resource(struct device_node *dev, const u32 *addrp,
+ u64 size, unsigned int flags,
+ struct resource *r)
+{
+ u64 taddr;
+
+ if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
+ return -EINVAL;
+ taddr = of_translate_address(dev, addrp);
+ if (taddr == OF_BAD_ADDR)
+ return -EINVAL;
+ memset(r, 0, sizeof(struct resource));
+ if (flags & IORESOURCE_IO) {
+ unsigned long port;
+ port = pci_address_to_pio(taddr);
+ if (port == (unsigned long)-1)
+ return -EINVAL;
+ r->start = port;
+ r->end = port + size - 1;
+ } else {
+ r->start = taddr;
+ r->end = taddr + size - 1;
+ }
+ r->flags = flags;
+ r->name = dev->name;
+ return 0;
+}
+
+/**
+ * of_address_to_resource - Translate device tree address and return as resource
+ *
+ * Note that if your address is a PIO address, the conversion will fail if
+ * the physical address can't be internally converted to an IO token with
+ * pci_address_to_pio(), that is because it's either called to early or it
+ * can't be matched to any host bridge IO space
+ */
+int of_address_to_resource(struct device_node *dev, int index,
+ struct resource *r)
+{
+ const u32 *addrp;
+ u64 size;
+ unsigned int flags;
+
+ addrp = of_get_address(dev, index, &size, &flags);
+ if (addrp == NULL)
+ return -EINVAL;
+ return __of_address_to_resource(dev, addrp, size, flags, r);
+}
+EXPORT_SYMBOL_GPL(of_address_to_resource);
+
+
/**
* of_iomap - Maps the memory mapped IO for a given device_node
* @device: the device whose io range will be mapped