u-boot/arch/arm/cpu/arm920t/s3c24x0/cpu_info.c
David Müller (ELSOFT AG) 9fd6826611 add print_cpuinfo to s3c24x0
Hello

This patch adds support for "print_cpuinfo" on Samsung s3c24x0
based targets. If activated by "#define CONFIG_DISPLAY_CPUINFO", the
chip ID and the 3 main cpu frequencies will be displayed.

Dave

Signed-off-by: David Müller <d.mueller@elsoft.ch>
2011-12-19 17:52:44 +01:00

54 lines
1.5 KiB
C

/*
* (C) Copyright 2010
* David Mueller <d.mueller@elsoft.ch>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/s3c24x0_cpu.h>
typedef ulong (*getfreq)(void);
static const getfreq freq_f[] = {
get_FCLK,
get_HCLK,
get_PCLK,
};
static const char freq_c[] = { 'F', 'H', 'P' };
int print_cpuinfo(void)
{
int i;
char buf[32];
/* the S3C2400 seems to be lacking a CHIP ID register */
#ifndef CONFIG_S3C2400
ulong cpuid;
struct s3c24x0_gpio * const gpio = s3c24x0_get_base_gpio();
cpuid = readl(&gpio->gstatus1);
printf("CPUID: %8lX\n", cpuid);
#endif
for (i = 0; i < ARRAY_SIZE(freq_f); i++)
printf("%cCLK: %8s MHz\n", freq_c[i], strmhz(buf, freq_f[i]()));
return 0;
}