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