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authorDavid Müller (ELSOFT AG) <d.mueller@elsoft.ch>2010-12-03 05:12:50 +0000
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2011-12-19 17:52:44 +0100
commit9fd6826611d345a780217631defb535254e7953c (patch)
treeff6e7eaf0b0cf72976938773fe9d34f6a4bc4ba1 /arch/arm/cpu/arm920t
parentdf65a3fe3504930d5a89699e9903554f4605b098 (diff)
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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>
Diffstat (limited to 'arch/arm/cpu/arm920t')
-rw-r--r--arch/arm/cpu/arm920t/s3c24x0/Makefile1
-rw-r--r--arch/arm/cpu/arm920t/s3c24x0/cpu_info.c54
2 files changed, 55 insertions, 0 deletions
diff --git a/arch/arm/cpu/arm920t/s3c24x0/Makefile b/arch/arm/cpu/arm920t/s3c24x0/Makefile
index bd53724..0029700 100644
--- a/arch/arm/cpu/arm920t/s3c24x0/Makefile
+++ b/arch/arm/cpu/arm920t/s3c24x0/Makefile
@@ -26,6 +26,7 @@ include $(TOPDIR)/config.mk
LIB = $(obj)lib$(SOC).o
COBJS-$(CONFIG_USE_IRQ) += interrupts.o
+COBJS-$(CONFIG_DISPLAY_CPUINFO) += cpu_info.o
COBJS-y += speed.o
COBJS-y += timer.o
COBJS-y += usb.o
diff --git a/arch/arm/cpu/arm920t/s3c24x0/cpu_info.c b/arch/arm/cpu/arm920t/s3c24x0/cpu_info.c
new file mode 100644
index 0000000..14c5c6a
--- /dev/null
+++ b/arch/arm/cpu/arm920t/s3c24x0/cpu_info.c
@@ -0,0 +1,54 @@
+/*
+ * (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;
+}