From: Huang, Tao <huangtao@rock-chips.com>
Date: Thu, 27 Oct 2016 11:41:45 +0000 (+0800)
Subject: arm64: cpuinfo: add system serial support
X-Git-Tag: firefly_0821_release~108
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=85be89ea619498724f8e92f39507b260ea561aed;p=firefly-linux-kernel-4.4.55.git

arm64: cpuinfo: add system serial support

Change-Id: I4542f07226e47e67be1f2792cffaa71fd6401442
Signed-off-by: Huang, Tao <huangtao@rock-chips.com>
---

diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
index cd5277012114..fa51b6ddacea 100644
--- a/arch/arm64/kernel/cpuinfo.c
+++ b/arch/arm64/kernel/cpuinfo.c
@@ -34,6 +34,12 @@
 #include <linux/smp.h>
 #include <linux/delay.h>
 
+unsigned int system_serial_low;
+EXPORT_SYMBOL(system_serial_low);
+
+unsigned int system_serial_high;
+EXPORT_SYMBOL(system_serial_high);
+
 /*
  * In case the boot CPU is hotpluggable, we record its initial state and
  * current state separately. Certain system registers may contain different
@@ -157,6 +163,9 @@ static int c_show(struct seq_file *m, void *v)
 		seq_printf(m, "CPU revision\t: %d\n\n", MIDR_REVISION(midr));
 	}
 
+	seq_printf(m, "Serial\t\t: %08x%08x\n",
+		   system_serial_high, system_serial_low);
+
 	return 0;
 }