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>
diff --git a/arch/arm/mach-lpc32xx/common.c b/arch/arm/mach-lpc32xx/common.c
index 5c96057..a48dc2d 100644
--- a/arch/arm/mach-lpc32xx/common.c
+++ b/arch/arm/mach-lpc32xx/common.c
@@ -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 @@
;
}
-static int __init lpc32xx_display_uid(void)
+static int __init lpc32xx_check_uid(void)
{
u32 uid[4];
@@ -233,6 +234,11 @@
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);