arch/arm64: Add Revision, Serial, Model to cpuinfo

Signed-off-by: Phil Elwell <phil@raspberrypi.org>

diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
index 05933c0..86bbf87 100644 (file)
--- a/arch/arm64/kernel/cpuinfo.c
+++ b/arch/arm64/kernel/cpuinfo.c
@@ -17,6 +17,7 @@
 #include <linux/elf.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
+#include <linux/of_platform.h>
 #include <linux/personality.h>
 #include <linux/preempt.h>
 #include <linux/printk.h>
@@ -128,6 +129,10 @@ static int c_show(struct seq_file *m, void *v)
 {
        int i, j;
        bool compat = personality(current->personality) == PER_LINUX32;
+       struct device_node *np;
+       const char *model;
+       const char *serial;
+       u32 revision;
 
        for_each_online_cpu(i) {
                struct cpuinfo_arm64 *cpuinfo = &per_cpu(cpu_data, i);
@@ -179,6 +184,26 @@ 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, "Hardware\t: BCM2835\n");
+
+       np = of_find_node_by_path("/system");
+       if (np) {
+               if (!of_property_read_u32(np, "linux,revision", &revision))
+                       seq_printf(m, "Revision\t: %04x\n", revision);
+               of_node_put(np);
+       }
+
+       np = of_find_node_by_path("/");
+       if (np) {
+               if (!of_property_read_string(np, "serial-number",
+                                            &serial))
+                       seq_printf(m, "Serial\t\t: %s\n", serial);
+               if (!of_property_read_string(np, "model",
+                                            &model))
+                       seq_printf(m, "Model\t\t: %s\n", model);
+               of_node_put(np);
+       }
+
        return 0;
 }