Generally, we can get cpu-related information, such as model name, from
/proc/cpuinfo. for DT-based systems, we need to parse the relevant
information from DTS.
Signed-off-by: Binbin Zhou <zhoubinbin@xxxxxxxxxxx>
Signed-off-by: Hongliang Wang <wanghongliang@xxxxxxxxxxx>
---
arch/loongarch/kernel/env.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/arch/loongarch/kernel/env.c b/arch/loongarch/kernel/env.c
index 6b3bfb0092e6..0191fe20b535 100644
--- a/arch/loongarch/kernel/env.c
+++ b/arch/loongarch/kernel/env.c
@@ -5,13 +5,16 @@
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
*/
#include <linux/acpi.h>
+#include <linux/clk.h>
#include <linux/efi.h>
#include <linux/export.h>
#include <linux/memblock.h>
+#include <linux/of_clk.h>
#include <asm/early_ioremap.h>
#include <asm/bootinfo.h>
#include <asm/loongson.h>
#include <asm/setup.h>
+#include <asm/time.h>
u64 efi_system_table;
struct loongson_system_configuration loongson_sysconf;
@@ -34,9 +37,39 @@ void __init init_environ(void)
efi_system_table = fw_arg2;
}
+static int __init fdt_cpu_clk_init(void)
+{
+ struct clk *clk;
+ struct device_node *np;
+
+ np = of_get_cpu_node(0, NULL);
+ if (!np)
+ return -ENODEV;
+
+ clk = of_clk_get(np, 0);
+ if (IS_ERR(clk))
+ return -ENODEV;
+
+ cpu_clock_freq = clk_get_rate(clk);
+ clk_put(clk);
+
+ return 0;
+}
+late_initcall(fdt_cpu_clk_init);
+
static int __init init_cpu_fullname(void)
{
int cpu;
+ char *prop;
+ struct device_node *root;
+
+ /* Parsing cpuname from DTS model property */
+ root = of_find_node_by_path("/");
+ if (root) {
+ of_property_read_string(root, "model", (const char **)&prop);
+ if (prop)
+ loongson_sysconf.cpuname = strsep(&prop, " ");
+ }
if (loongson_sysconf.cpuname && !strncmp(loongson_sysconf.cpuname, "Loongson", 8)) {
for (cpu = 0; cpu < NR_CPUS; cpu++)
--
2.39.3
