ARM: LPC32xx: Set system serial based on cpu unique id (e39942f5) · Commits · 戴 / test

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:

arch/arm/mach-lpc32xx/common.c

+8 −2

Original line number	Diff line number	Diff line
		@@ -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);