1 #include <linux/init.h> 2 #include <linux/device.h> 3 #include <linux/kernel.h> 4 #include <linux/of.h> 5 #include <linux/of_address.h> 6 #include "board.h" 7 8 static bool find_by_address(u64 base_address) 9 { 10 struct device_node *dn = of_find_all_nodes(NULL); 11 struct resource res; 12 13 while (dn) { 14 if (!of_address_to_resource(dn, 0, &res)) { 15 if (res.start == base_address) { 16 of_node_put(dn); 17 return true; 18 } 19 } 20 dn = of_find_all_nodes(dn); 21 } 22 23 return false; 24 } 25 26 bool __init board_staging_dt_node_available(const struct resource *resource, 27 unsigned int num_resources) 28 { 29 unsigned int i; 30 31 for (i = 0; i < num_resources; i++) { 32 const struct resource *r = resource + i; 33 34 if (resource_type(r) == IORESOURCE_MEM) 35 if (find_by_address(r->start)) 36 return true; /* DT node available */ 37 } 38 39 return false; /* Nothing found */ 40 } 41