| Andy Fleming | 2915609 | 2010-10-20 15:35:16 -0500 | [diff] [blame] | 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 | } |