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ARM: LPC32xx: Set system serial based on cpu unique id 

LPC32xx SoC has a 128 bits unique id that can be used as a system
serial number, if none has been provided by atags or dt.

Signed-off-by: Alexandre Pereira da Silva <aletes.xgr@gmail.com>
Signed-off-by: Roland Stigge <stigge@antcom.de>
This commit is contained in:
Alexandre Pereira da Silva 2012-07-20 14:01:51 +02:00 committed by Roland Stigge
parent 8ba85f8bff
commit e39942f527
1 changed files with 8 additions and 2 deletions
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10
arch/arm/mach-lpc32xx/common.c
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@ -26,6 +26,7 @@
#include <linux/io.h>
#include <asm/mach/map.h>
#include <asm/system_info.h>
#include <mach/hardware.h>
#include <mach/platform.h>
@ -224,7 +225,7 @@ void lpc23xx_restart(char mode, const char *cmd)
;
}
static int __init lpc32xx_display_uid(void)
static int __init lpc32xx_check_uid(void)
{
u32 uid[4];
@ -233,6 +234,11 @@ static int __init lpc32xx_display_uid(void)
printk(KERN_INFO "LPC32XX unique ID: %08x%08x%08x%08x\n",
uid[3], uid[2], uid[1], uid[0]);
if (!system_serial_low && !system_serial_high) {
system_serial_low = uid[0];
system_serial_high = uid[1];
}
return 1;
}
arch_initcall(lpc32xx_display_uid);
arch_initcall(lpc32xx_check_uid);