I removed unneeded casts and now hopefully really checking the first word for 
the magic...
Also renamed everything to ath5k_platform here, too, of course.


This adds ath_platform.h to mac80211 and patches ath5k to respect MAC addresses 
and eeprom content from platform_data, if supplied.

Signed-off-by: Daniel Golle <daniel.go...@gmail.com>

Index: package/mac80211/patches/450-add-ath5k-platform.patch
===================================================================
--- package/mac80211/patches/450-add-ath5k-platform.patch       (revision 0)
+++ package/mac80211/patches/450-add-ath5k-platform.patch       (revision 0)
@@ -0,0 +1,35 @@
+diff -Nur a/include/linux/ath5k_platform.h b/include/linux/ath5k_platform.h
+--- a/include/linux/ath5k_platform.h   1970-01-01 01:00:00.000000000 +0100
++++ b/include/linux/ath5k_platform.h   2010-06-21 00:19:52.000000000 +0200
+@@ -0,0 +1,30 @@
++/*
++ * Copyright (c) 2008 Atheros Communications Inc.
++ * Copyright (c) 2009 Gabor Juhos <juh...@openwrt.org>
++ * Copyright (c) 2009 Imre Kaloz <ka...@openwrt.org>
++ * Copyright (c) 2010 Daniel Golle <daniel.go...@gmail.com>
++ *
++ * Permission to use, copy, modify, and/or distribute this software for any
++ * purpose with or without fee is hereby granted, provided that the above
++ * copyright notice and this permission notice appear in all copies.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
++ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
++ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
++ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
++ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
++ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
++ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
++ */
++
++#ifndef _LINUX_ATH5K_PLATFORM_H
++#define _LINUX_ATH5K_PLATFORM_H
++
++#define ATH5K_PLAT_EEP_MAX_WORDS      2048
++
++struct ath5k_platform_data {
++      u16 *eeprom_data;
++      u8 *macaddr;
++};
++
++#endif /* _LINUX_ATH5K_PLATFORM_H */
+
Index: package/mac80211/patches/451-add-platform-eeprom-support-to-ath5k.patch
===================================================================
--- package/mac80211/patches/451-add-platform-eeprom-support-to-ath5k.patch     
(revision 0)
+++ package/mac80211/patches/451-add-platform-eeprom-support-to-ath5k.patch     
(revision 0)
@@ -0,0 +1,57 @@
+--- a/drivers/net/wireless/ath/ath5k/eeprom.c  2010-06-23 03:08:32.000000000 
+0200
++++ b/drivers/net/wireless/ath/ath5k/eeprom.c  2010-06-23 05:59:30.000000000 
+0200
+@@ -22,6 +23,8 @@
+ \*************************************/
+ 
+ #include <linux/slab.h>
++#include <linux/ath5k_platform.h>
++#include <linux/pci.h>
+ 
+ #include "ath5k.h"
+ #include "reg.h"
+@@ -34,6 +37,18 @@
+ static int ath5k_hw_eeprom_read(struct ath5k_hw *ah, u32 offset, u16 *data)
+ {
+       u32 status, timeout;
++      struct ath5k_platform_data *pdata = NULL;
++
++      if (ah->ah_sc->pdev)
++              pdata = ah->ah_sc->pdev->dev.platform_data;
++
++      if (pdata && pdata->eeprom_data && pdata->eeprom_data[0] == 
AR5K_EEPROM_MAGIC_VALUE)
++      {
++              ATH5K_INFO(ah->ah_sc, "using eeprom-content from 
platform_data\n");
++              if (offset >= ATH5K_PLAT_EEP_MAX_WORDS) return -EIO;
++              *data = pdata->eeprom_data[offset];
++              return 0;
++      }
+ 
+       /*
+        * Initialize EEPROM access
+@@ -1788,7 +1802,7 @@
+ }
+ 
+ /*
+- * Read the MAC address from eeprom
++ * Read the MAC address from eeprom or platform_data
+  */
+ int ath5k_eeprom_read_mac(struct ath5k_hw *ah, u8 *mac)
+ {
+@@ -1796,6 +1810,16 @@
+       u32 total, offset;
+       u16 data;
+       int octet, ret;
++      struct ath5k_platform_data *pdata = NULL;
++
++      if (ah->ah_sc->pdev)
++              pdata = ah->ah_sc->pdev->dev.platform_data;
++
++      if (pdata && pdata->macaddr)
++      {
++              memcpy(mac, pdata->macaddr, ETH_ALEN);
++              return 0;
++      }
+ 
+       ret = ath5k_hw_eeprom_read(ah, 0x20, &data);
+       if (ret)
+
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