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 cd52770..fa51b6d 100644 (file)
--- a/arch/arm64/kernel/cpuinfo.c
+++ b/arch/arm64/kernel/cpuinfo.c
@@ -34,6 +34,12 @@
 #include <linux/smp.h>
 #include <linux/delay.h>
 
 #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
 /*
  * 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, "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;
 }
 
        return 0;
 }