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authorIngo Molnar <mingo@elte.hu>2009-06-17 12:52:15 +0200
committerIngo Molnar <mingo@elte.hu>2009-06-17 12:56:49 +0200
commiteadb8a091b27a840de7450f84ecff5ef13476424 (patch)
tree58c3782d40def63baa8167f3d31e3048cb4c7660 /arch/arm/plat-s3c/include/plat/watchdog-reset.h
parent73874005cd8800440be4299bd095387fff4b90ac (diff)
parent65795efbd380a832ae508b04dba8f8e53f0b84d9 (diff)
Merge branch 'linus' into tracing/hw-breakpoints
Conflicts: arch/x86/Kconfig arch/x86/kernel/traps.c arch/x86/power/cpu.c arch/x86/power/cpu_32.c kernel/Makefile Semantic conflict: arch/x86/kernel/hw_breakpoint.c Merge reason: Resolve the conflicts, move from put_cpu_no_sched() to put_cpu() in arch/x86/kernel/hw_breakpoint.c. Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/arm/plat-s3c/include/plat/watchdog-reset.h')
-rw-r--r--arch/arm/plat-s3c/include/plat/watchdog-reset.h49
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/arm/plat-s3c/include/plat/watchdog-reset.h b/arch/arm/plat-s3c/include/plat/watchdog-reset.h
new file mode 100644
index 00000000000..54b762acb5a
--- /dev/null
+++ b/arch/arm/plat-s3c/include/plat/watchdog-reset.h
@@ -0,0 +1,49 @@
+/* arch/arm/plat-s3c/include/plat/watchdog-reset.h
+ *
+ * Copyright (c) 2008 Simtec Electronics
+ * Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C2410 - System define for arch_reset() function
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <plat/regs-watchdog.h>
+#include <mach/map.h>
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+
+static inline void arch_wdt_reset(void)
+{
+ struct clk *wdtclk;
+
+ printk("arch_reset: attempting watchdog reset\n");
+
+ __raw_writel(0, S3C2410_WTCON); /* disable watchdog, to be safe */
+
+ wdtclk = clk_get(NULL, "watchdog");
+ if (!IS_ERR(wdtclk)) {
+ clk_enable(wdtclk);
+ } else
+ printk(KERN_WARNING "%s: warning: cannot get watchdog clock\n", __func__);
+
+ /* put initial values into count and data */
+ __raw_writel(0x80, S3C2410_WTCNT);
+ __raw_writel(0x80, S3C2410_WTDAT);
+
+ /* set the watchdog to go and reset... */
+ __raw_writel(S3C2410_WTCON_ENABLE|S3C2410_WTCON_DIV16|S3C2410_WTCON_RSTEN |
+ S3C2410_WTCON_PRESCALE(0x20), S3C2410_WTCON);
+
+ /* wait for reset to assert... */
+ mdelay(500);
+
+ printk(KERN_ERR "Watchdog reset failed to assert reset\n");
+
+ /* delay to allow the serial port to show the message */
+ mdelay(50);
+}