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-rw-r--r--arch/arm/mach-s3c/cpu.c32
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diff --git a/arch/arm/mach-s3c/cpu.c b/arch/arm/mach-s3c/cpu.c
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index 0000000000..3491f790d5
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+++ b/arch/arm/mach-s3c/cpu.c
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2009-2011 Samsung Electronics Co., Ltd.
+// http://www.samsung.com
+//
+// Samsung CPU Support
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+
+#include "map-base.h"
+#include "cpu.h"
+
+unsigned long samsung_cpu_id;
+
+void __init s3c64xx_init_cpu(void)
+{
+ samsung_cpu_id = readl_relaxed(S3C_VA_SYS + 0x118);
+ if (!samsung_cpu_id) {
+ /*
+ * S3C6400 has the ID register in a different place,
+ * and needs a write before it can be read.
+ */
+ writel_relaxed(0x0, S3C_VA_SYS + 0xA1C);
+ samsung_cpu_id = readl_relaxed(S3C_VA_SYS + 0xA1C);
+ }
+
+ pr_info("Samsung CPU ID: 0x%08lx\n", samsung_cpu_id);
+ pr_err("The platform is deprecated and scheduled for removal. Please reach to the maintainers of the platform and linux-samsung-soc@vger.kernel.org if you still use it. Without such feedback, the platform will be removed after 2022.\n");
+}