int platform_dma_configure(struct device *dev)
{
enum dev_dma_attr attr;
int ret = 0;
if (dev->of_node) {
ret = of_dma_configure(dev, dev->of_node, true);
} else if (has_acpi_companion(dev)) {
attr = acpi_get_dma_attr(to_acpi_device_node(dev->fwnode));
ret = acpi_dma_configure(dev, attr);
}
return ret;
}
/**
* fwnode_get_reference_node - Find the firmware node referenced
* @fwnode: Firmware node to get the property from.
* @propname: Name of the property
* @index: Index of the reference
*
* Returns referenced fwnode handler pointer, or an NULL if not found
*/
struct fwnode_handle *fwnode_get_reference_node(struct fwnode_handle *fwnode,
const char *propname, int index)
{
if (is_of_node(fwnode)) {
struct device_node *np;
np = of_parse_phandle(to_of_node(fwnode), propname, index);
if(!np)
return NULL;
return &np->fwnode;
} else if (is_acpi_node(fwnode)) {
struct acpi_device *adev;
adev = acpi_dev_get_reference_device(to_acpi_device_node(fwnode),
propname, index);
if(!adev)
return NULL;
return acpi_fwnode_handle(adev);
}
return NULL;
}
