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From 6ce4c2034f11fe1ba270637ebd5ba459c69e2b27 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Tue, 3 Sep 2019 18:17:25 +0100
Subject: [PATCH] arch/arm64: Add Revision, Serial, Model to cpuinfo
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
arch/arm64/kernel/cpuinfo.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
--- 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, vo
{
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, vo
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;
}
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