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authorAlexandre Pereira da Silva <aletes.xgr@gmail.com>2012-07-20 16:01:51 +0400
committerRoland Stigge <stigge@antcom.de>2012-07-20 16:01:51 +0400
commite39942f527fb02b73236d872d22c1b6b8335266c (patch)
tree7bda3b7b6601a381e8d413e3a82a2de9d9248c04 /arch/arm/mach-lpc32xx/common.c
parent8ba85f8bffdfbac98dac8630406f7d020103db70 (diff)
downloadlinux-e39942f527fb02b73236d872d22c1b6b8335266c.tar.xz
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>
Diffstat (limited to 'arch/arm/mach-lpc32xx/common.c')
-rw-r--r--arch/arm/mach-lpc32xx/common.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/arm/mach-lpc32xx/common.c b/arch/arm/mach-lpc32xx/common.c
index 5c96057b6d78..a48dc2dec485 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 @@ 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);