static struct device_node * __init tilcdc_get_overlay(struct kfree_table *kft)
{
const int size = __dtb_tilcdc_slave_compat_end -
__dtb_tilcdc_slave_compat_begin;
static void *overlay_data;
struct device_node *overlay;
int ret;
if (!size) {
pr_warn("%s: No overlay data\n", __func__);
return NULL;
}
overlay_data = kmemdup(__dtb_tilcdc_slave_compat_begin,
size, GFP_KERNEL);
if (!overlay_data || kfree_table_add(kft, overlay_data))
return NULL;
of_fdt_unflatten_tree(overlay_data, NULL, &overlay);
if (!overlay) {
pr_warn("%s: Unfattening overlay tree failed\n", __func__);
return NULL;
}
of_node_set_flag(overlay, OF_DETACHED);
ret = of_resolve_phandles(overlay);
if (ret) {
pr_err("%s: Failed to resolve phandles: %d\n", __func__, ret);
return NULL;
}
return overlay;
}
/**
* dtbocfg_overlay_create() - Create Device Tree Overlay
* @overlay: Pointer to Device Tree Overlay Item
* return Success(0) or Error Status.
*/
static int dtbocfg_overlay_item_create(struct dtbocfg_overlay_item *overlay)
{
int ret_val;
of_fdt_unflatten_tree(overlay->dtbo, &overlay->node);
if (overlay->node == NULL) {
pr_err("%s: failed to unflatten tree\n", __func__);
ret_val = -EINVAL;
goto failed;
}
pr_debug("%s: unflattened OK\n", __func__);
of_node_set_flag(overlay->node, OF_DETACHED);
ret_val = of_resolve_phandles(overlay->node);
if (ret_val != 0) {
pr_err("%s: Failed to resolve tree\n", __func__);
goto failed;
}
pr_debug("%s: resolved OK\n", __func__);
ret_val = of_overlay_create(overlay->node);
if (ret_val < 0) {
pr_err("%s: Failed to create overlay (ret_val=%d)\n", __func__, ret_val);
goto failed;
}
overlay->id = ret_val;
pr_debug("%s: create OK\n", __func__);
return 0;
failed:
return ret_val;
}
