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authorAndrew Victor <andrew@sanpeople.com>2007-05-11 21:01:28 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2007-05-11 22:02:48 +0100
commitc53c9cf60e49119e97d38390849cac5b2f0a0981 (patch)
tree37615dedbbd8980b8357df47d90843eb86d017ff /arch/arm/mach-ks8695/cpu.c
parentc42dcb3dcfd3a473ab7c79c2ae91fc1c2e4dc5db (diff)
downloadop-kernel-dev-c53c9cf60e49119e97d38390849cac5b2f0a0981.zip
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[ARM] 4331/3: Support for Micrel/Kendin KS8695 processor
Add core support for the Kendin/Micrel KS8695 processor family. It is an ARM922-T based SoC with integrated USART, 4-port Ethernet Switch, WAN Ethernet port, and optional PCI Host bridge, etc. http://www.micrel.com/page.do?page=product-info/sys_on_chip.jsp This patch is based on earlier patches from Lennert Buytenhek, Ben Dooks and Greg Ungerer posted to the arm-linux-kernel mailing list in March 2006; and Micrel's 2.6.9 port. Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-ks8695/cpu.c')
-rw-r--r--arch/arm/mach-ks8695/cpu.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/arch/arm/mach-ks8695/cpu.c b/arch/arm/mach-ks8695/cpu.c
new file mode 100644
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--- /dev/null
+++ b/arch/arm/mach-ks8695/cpu.c
@@ -0,0 +1,73 @@
+/*
+ * arch/arm/mach-ks8695/cpu.c
+ *
+ * Copyright (C) 2006 Ben Dooks <ben@simtec.co.uk>
+ * Copyright (C) 2006 Simtec Electronics
+ *
+ * KS8695 CPU support
+ *
+ * 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 <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+
+#include <asm/arch/regs-sys.h>
+#include <asm/arch/regs-misc.h>
+
+
+static struct __initdata map_desc ks8695_io_desc[] = {
+ {
+ .virtual = KS8695_IO_VA,
+ .pfn = __phys_to_pfn(KS8695_IO_PA),
+ .length = KS8695_IO_SIZE,
+ .type = MT_DEVICE,
+ }
+};
+
+static void __init ks8695_processor_info(void)
+{
+ unsigned long id, rev;
+
+ id = __raw_readl(KS8695_MISC_VA + KS8695_DID);
+ rev = __raw_readl(KS8695_MISC_VA + KS8695_RID);
+
+ printk("KS8695 ID=%04lx SubID=%02lx Revision=%02lx\n", (id & DID_ID), (rev & RID_SUBID), (rev & RID_REVISION));
+}
+
+static unsigned int sysclk[8] = { 125000000, 100000000, 62500000, 50000000, 41700000, 33300000, 31300000, 25000000 };
+static unsigned int cpuclk[8] = { 166000000, 166000000, 83000000, 83000000, 55300000, 55300000, 41500000, 41500000 };
+
+static void __init ks8695_clock_info(void)
+{
+ unsigned int scdc = __raw_readl(KS8695_SYS_VA + KS8695_CLKCON) & CLKCON_SCDC;
+
+ printk("Clocks: System %u MHz, CPU %u MHz\n",
+ sysclk[scdc] / 1000000, cpuclk[scdc] / 1000000);
+}
+
+void __init ks8695_map_io(void)
+{
+ iotable_init(ks8695_io_desc, ARRAY_SIZE(ks8695_io_desc));
+
+ ks8695_processor_info();
+ ks8695_clock_info();
+}
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