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

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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
This commit is contained in:
Phil Elwell
2019-09-03 18:17:25 +01:00
committed by Dom Cobley
parent f7a345e39f
commit c61c201ea6
1 changed files with 24 additions and 0 deletions
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24
arch/arm64/kernel/cpuinfo.c
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@@ -17,6 +17,8 @@
#include <linux/elf.h> #include <linux/elf.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/personality.h> #include <linux/personality.h>
#include <linux/preempt.h> #include <linux/preempt.h>
#include <linux/printk.h> #include <linux/printk.h>
@@ -216,6 +218,10 @@ static int c_show(struct seq_file *m, void *v)
bool compat = personality(current->personality) == PER_LINUX32; bool compat = personality(current->personality) == PER_LINUX32;
struct cpuinfo_arm64 *cpuinfo = v; struct cpuinfo_arm64 *cpuinfo = v;
u32 midr = cpuinfo->reg_midr; u32 midr = cpuinfo->reg_midr;
struct device_node *np;
const char *model;
const char *serial;
u32 revision;
/* /*
* glibc reads /proc/cpuinfo to determine the number of * glibc reads /proc/cpuinfo to determine the number of
@@ -271,6 +277,24 @@ static int c_show(struct seq_file *m, void *v)
seq_printf(m, "CPU part\t: 0x%03x\n", MIDR_PARTNUM(midr)); seq_printf(m, "CPU part\t: 0x%03x\n", MIDR_PARTNUM(midr));
seq_printf(m, "CPU revision\t: %d\n\n", MIDR_REVISION(midr)); seq_printf(m, "CPU revision\t: %d\n\n", MIDR_REVISION(midr));
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; return 0;
} }