From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 arch/arm/plat-samsung/cpu.c | 53 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 arch/arm/plat-samsung/cpu.c

(limited to 'arch/arm/plat-samsung/cpu.c')

diff --git a/arch/arm/plat-samsung/cpu.c b/arch/arm/plat-samsung/cpu.c
new file mode 100644
index 000000000..71333bb61
--- /dev/null
+++ b/arch/arm/plat-samsung/cpu.c
@@ -0,0 +1,53 @@
+/* linux/arch/arm/plat-samsung/cpu.c
+ *
+ * Copyright (c) 2009-2011 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Samsung CPU Support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+
+#include <plat/map-base.h>
+#include <plat/cpu.h>
+
+unsigned long samsung_cpu_id;
+static unsigned int samsung_cpu_rev;
+
+unsigned int samsung_rev(void)
+{
+	return samsung_cpu_rev;
+}
+EXPORT_SYMBOL(samsung_rev);
+
+void __init s3c64xx_init_cpu(void)
+{
+	samsung_cpu_id = __raw_readl(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.
+		 */
+		__raw_writel(0x0, S3C_VA_SYS + 0xA1C);
+		samsung_cpu_id = __raw_readl(S3C_VA_SYS + 0xA1C);
+	}
+
+	samsung_cpu_rev = 0;
+
+	pr_info("Samsung CPU ID: 0x%08lx\n", samsung_cpu_id);
+}
+
+void __init s5p_init_cpu(void __iomem *cpuid_addr)
+{
+	samsung_cpu_id = __raw_readl(cpuid_addr);
+	samsung_cpu_rev = samsung_cpu_id & 0xFF;
+
+	pr_info("Samsung CPU ID: 0x%08lx\n", samsung_cpu_id);
+}
-- 
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