68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
/*
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* Copyright 2011 Freescale Semiconductor, Inc.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <libfdt.h>
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#include <libfdt_env.h>
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#include <fdt_support.h>
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/*
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* Given the following ...
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*
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* 1) A pointer to an Fman Ethernet node (as identified by the 'compat'
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* compatible string and 'addr' physical address)
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*
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* 2) The name of an alias that points to the ethernet-phy node (usually inside
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* a virtual MDIO node)
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*
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* ... update that Ethernet node's phy-handle property to point to the
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* ethernet-phy node. This is how we link an Ethernet node to its PHY, so each
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* PHY in a virtual MDIO node must have an alias.
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*/
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void fdt_set_phy_handle(void *fdt, char *compat, phys_addr_t addr,
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const char *alias)
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{
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int offset, ph;
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const char *path;
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/* Get a path to the node that 'alias' points to */
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path = fdt_get_alias(fdt, alias);
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if (path) {
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/* Get the offset of that node */
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int off = fdt_path_offset(fdt, path);
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if (off > 0)
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ph = fdt_create_phandle(fdt, off);
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else
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return;
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} else {
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return ;
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}
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/* failed to create a phandle */
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if (ph <= 0)
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return ;
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offset = fdt_node_offset_by_compat_reg(fdt, compat, addr);
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if (offset > 0)
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fdt_setprop(fdt, offset, "phy-handle", &ph, sizeof(ph));
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}
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