diff options
Diffstat (limited to 'arch/arm/mach-s3c/cpu.c')
| -rw-r--r-- | arch/arm/mach-s3c/cpu.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c/cpu.c b/arch/arm/mach-s3c/cpu.c new file mode 100644 index 000000000000..6e9772555f0d --- /dev/null +++ b/arch/arm/mach-s3c/cpu.c @@ -0,0 +1,31 @@ +// 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 <mach/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); +} |