/**
* macio_release_resource - Release an MMIO resource
* @dev: pointer to the device holding the resource
* @resource_no: resource number to release
*/
void macio_release_resource(struct macio_dev *dev, int resource_no)
{
if (macio_resource_len(dev, resource_no) == 0)
return;
release_mem_region(macio_resource_start(dev, resource_no),
macio_resource_len(dev, resource_no));
}
int macio_request_resource(struct macio_dev *dev, int resource_no,
const char *name)
{
struct macio_devres *dr = find_macio_dr(dev);
if (macio_resource_len(dev, resource_no) == 0)
return 0;
if (!request_mem_region(macio_resource_start(dev, resource_no),
macio_resource_len(dev, resource_no),
name))
goto err_out;
if (dr && resource_no < 32)
dr->res_mask |= 1 << resource_no;
return 0;
err_out:
printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
" for device %s\n",
resource_no,
macio_resource_len(dev, resource_no),
macio_resource_start(dev, resource_no),
dev_name(&dev->ofdev.dev));
return -EBUSY;
}
void macio_release_resource(struct macio_dev *dev, int resource_no)
{
struct macio_devres *dr = find_macio_dr(dev);
if (macio_resource_len(dev, resource_no) == 0)
return;
release_mem_region(macio_resource_start(dev, resource_no),
macio_resource_len(dev, resource_no));
if (dr && resource_no < 32)
dr->res_mask &= ~(1 << resource_no);
}
/**
* macio_request_resource - Request an MMIO resource
* @dev: pointer to the device holding the resource
* @resource_no: resource number to request
* @name: resource name
*
* Mark memory region number @resource_no associated with MacIO
* device @dev as being reserved by owner @name. Do not access
* any address inside the memory regions unless this call returns
* successfully.
*
* Returns 0 on success, or %EBUSY on error. A warning
* message is also printed on failure.
*/
int macio_request_resource(struct macio_dev *dev, int resource_no,
const char *name)
{
if (macio_resource_len(dev, resource_no) == 0)
return 0;
if (!request_mem_region(macio_resource_start(dev, resource_no),
macio_resource_len(dev, resource_no),
name))
goto err_out;
return 0;
err_out:
printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
" for device %s\n",
resource_no,
macio_resource_len(dev, resource_no),
macio_resource_start(dev, resource_no),
dev->ofdev.dev.bus_id);
return -EBUSY;
}