target/linux/bcm27xx/patches-5.15/950-0169-arch-arm64-Add-Revision-Serial-Model-to-cpuinfo.patch

   1 From c1c1dc795330dc5f53396612c0e91a106d91ef99 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Tue, 3 Sep 2019 18:17:25 +0100
   4 Subject: [PATCH] arch/arm64: Add Revision, Serial, Model to cpuinfo
   5
   6 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
   7 ---
   8  arch/arm64/kernel/cpuinfo.c | 25 +++++++++++++++++++++++++
   9  1 file changed, 25 insertions(+)
  10
  11 --- a/arch/arm64/kernel/cpuinfo.c
  12 +++ b/arch/arm64/kernel/cpuinfo.c
  13 @@ -17,6 +17,7 @@
  14  #include <linux/elf.h>
  15  #include <linux/init.h>
  16  #include <linux/kernel.h>
  17 +#include <linux/of_platform.h>
  18  #include <linux/personality.h>
  19  #include <linux/preempt.h>
  20  #include <linux/printk.h>
  21 @@ -140,6 +141,10 @@ static int c_show(struct seq_file *m, vo
  22  {
  23         int i, j;
  24         bool compat = personality(current->personality) == PER_LINUX32;
  25 +       struct device_node *np;
  26 +       const char *model;
  27 +       const char *serial;
  28 +       u32 revision;
  29
  30         for_each_online_cpu(i) {
  31                 struct cpuinfo_arm64 *cpuinfo = &per_cpu(cpu_data, i);
  32 @@ -200,6 +205,26 @@ static int c_show(struct seq_file *m, vo
  33                 seq_printf(m, "CPU revision\t: %d\n\n", MIDR_REVISION(midr));
  34         }
  35
  36 +       seq_printf(m, "Hardware\t: BCM2835\n");
  37 +
  38 +       np = of_find_node_by_path("/system");
  39 +       if (np) {
  40 +               if (!of_property_read_u32(np, "linux,revision", &revision))
  41 +                       seq_printf(m, "Revision\t: %04x\n", revision);
  42 +               of_node_put(np);
  43 +       }
  44 +
  45 +       np = of_find_node_by_path("/");
  46 +       if (np) {
  47 +               if (!of_property_read_string(np, "serial-number",
  48 +                                            &serial))
  49 +                       seq_printf(m, "Serial\t\t: %s\n", serial);
  50 +               if (!of_property_read_string(np, "model",
  51 +                                            &model))
  52 +                       seq_printf(m, "Model\t\t: %s\n", model);
  53 +               of_node_put(np);
  54 +       }
  55 +
  56         return 0;
  57  }
  58