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authorGrant Likely <grant.likely@secretlab.ca>2010-06-08 07:48:15 -0600
committerGrant Likely <grant.likely@secretlab.ca>2010-07-05 16:14:29 -0600
commitac80a51e2ce5c431de9997085f33cb6093218b1f (patch)
tree4f0137a0a5848cb20de5621b098bcfc44d82707c /drivers/of/platform.c
parent94c0931983ee9d1cd96c32d52ac64c17464f0bbd (diff)
downloadlinux-ac80a51e2ce5c431de9997085f33cb6093218b1f.tar.bz2
of/device: populate platform_device (of_device) resource table on allocation
When allocating a platform_device to represent an OF node, also allocate space for the resource table and populate it with IRQ and reg property information. This change is in preparation for merging the of_platform_bus_type with the platform_bus_type so that existing platform_driver code can retrieve base addresses and IRQs data. Background: a previous commit removed struct of_device and made it a #define alias for platform_device. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> CC: Michal Simek <monstr@monstr.eu> CC: Grant Likely <grant.likely@secretlab.ca> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Stephen Rothwell <sfr@canb.auug.org.au> CC: microblaze-uclinux@itee.uq.edu.au CC: linuxppc-dev@ozlabs.org CC: devicetree-discuss@lists.ozlabs.org
Diffstat (limited to 'drivers/of/platform.c')
-rw-r--r--drivers/of/platform.c29
1 files changed, 27 insertions, 2 deletions
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index ea87a3cf7860..5cc9a8e91be5 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -475,10 +475,35 @@ struct of_device *of_device_alloc(struct device_node *np,
struct device *parent)
{
struct of_device *dev;
-
- dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ int rc, i, num_reg = 0, num_irq = 0;
+ struct resource *res, temp_res;
+
+ /* First count how many resources are needed */
+ while (of_address_to_resource(np, num_reg, &temp_res) == 0)
+ num_reg++;
+ while (of_irq_to_resource(np, num_irq, &temp_res) != NO_IRQ)
+ num_irq++;
+
+ /* Allocate memory for both the struct device and the resource table */
+ dev = kzalloc(sizeof(*dev) + (sizeof(*res) * (num_reg + num_irq)),
+ GFP_KERNEL);
if (!dev)
return NULL;
+ res = (struct resource *) &dev[1];
+
+ /* Populate the resource table */
+ if (num_irq || num_reg) {
+ dev->num_resources = num_reg + num_irq;
+ dev->resource = res;
+ for (i = 0; i < num_reg; i++, res++) {
+ rc = of_address_to_resource(np, i, res);
+ WARN_ON(rc);
+ }
+ for (i = 0; i < num_irq; i++, res++) {
+ rc = of_irq_to_resource(np, i, res);
+ WARN_ON(rc == NO_IRQ);
+ }
+ }
dev->dev.of_node = of_node_get(np);
dev->dev.dma_mask = &dev->archdata.dma_mask;