1 /* 2 * Copyright 2011 Freescale Semiconductor, Inc. 3 * 4 * See file CREDITS for list of people who contributed to this 5 * project. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License as 9 * published by the Free Software Foundation; either version 2 of 10 * the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 20 * MA 02111-1307 USA 21 */ 22 23 #include <common.h> 24 #include <libfdt.h> 25 #include <libfdt_env.h> 26 #include <fdt_support.h> 27 28 /* 29 * Given the following ... 30 * 31 * 1) A pointer to an Fman Ethernet node (as identified by the 'compat' 32 * compatible string and 'addr' physical address) 33 * 34 * 2) The name of an alias that points to the ethernet-phy node (usually inside 35 * a virtual MDIO node) 36 * 37 * ... update that Ethernet node's phy-handle property to point to the 38 * ethernet-phy node. This is how we link an Ethernet node to its PHY, so each 39 * PHY in a virtual MDIO node must have an alias. 40 */ 41 void fdt_set_phy_handle(void *fdt, char *compat, phys_addr_t addr, 42 const char *alias) 43 { 44 int offset, ph; 45 const char *path; 46 47 /* Get a path to the node that 'alias' points to */ 48 path = fdt_get_alias(fdt, alias); 49 if (path) { 50 /* Get the offset of that node */ 51 int off = fdt_path_offset(fdt, path); 52 if (off > 0) 53 ph = fdt_create_phandle(fdt, off); 54 else 55 return; 56 } else { 57 return ; 58 } 59 60 /* failed to create a phandle */ 61 if (ph <= 0) 62 return ; 63 64 offset = fdt_node_offset_by_compat_reg(fdt, compat, addr); 65 if (offset > 0) 66 fdt_setprop(fdt, offset, "phy-handle", &ph, sizeof(ph)); 67 } 68