Cregit: Linux 5.2: cpu.c

Contributors: 5
Author	Tokens	Token Proportion	Commits	Commit Proportion
Kukjin Kim	109	80.74%	1	16.67%
Olof Johansson	14	10.37%	1	16.67%
Krzysztof Kozlowski	7	5.19%	2	33.33%
Ben Dooks	4	2.96%	1	16.67%
Tomasz Figa	1	0.74%	1	16.67%
Total	135		6

// 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 <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 = 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);
	}

	samsung_cpu_rev = 0;

	pr_info("Samsung CPU ID: 0x%08lx\n", samsung_cpu_id);
}

void __init s5p_init_cpu(const void __iomem *cpuid_addr)
{
	samsung_cpu_id = readl_relaxed(cpuid_addr);
	samsung_cpu_rev = samsung_cpu_id & 0xFF;

	pr_info("Samsung CPU ID: 0x%08lx\n", samsung_cpu_id);
}