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authorLinus Torvalds <torvalds@linux-foundation.org>2008-04-21 15:40:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-21 15:40:55 -0700
commit85b375a613085b78531ec86369a51c2f3b922f95 (patch)
tree716437d598de92bbd7acaf24622e9a7d74fc209a /include/asm-arm/arch-s3c2410/system-reset.h
parentec965350bb98bd291eb34f6ecddfdcfc36da1e6e (diff)
parentcf816ecb533ab96b883dfdc0db174598b5b5c4d2 (diff)
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (212 commits) [ARM] pxa: Phycore pcm-990-specific code for the PXA270 Quick Capture driver [ARM] pxa: V4L2 soc_camera driver for PXA270 [ARM] pxa: restrict availability of pxa2xx PCMCIA drivers [ARM] 5005/1: BAST: Fix kset_name initialiser [ARM] 4967/1: Adds functions to set clkout rate for Samsung S3C2410 [ARM] 4988/1: Add GPIO lib support to the EP93xx [ARM] Add initial sparsemem support [ARM] pxa: initialise PXA devices before platform init code [ARM] 5002/1: tosa: add two more leds [ARM] 5004/1: Tosa: make several unreferenced structures static. [ARM] 5003/1: Shut up sparse warnings [ARM] 4977/2: soc - pxa2xx-ac97 - Add missing clk_enable() [ARM] 4976/1: zylonite: Configure GPIO for WM9713 IRQ line [ARM] 4974/1: Drop unused leds-tosa. [ARM] 4973/1: Tosa: use leds-gpio driver. [ARM] 4972/1: Tosa: convert scoop GPIOs usage to generic gpio code [ARM] 4971/1: pxaficp_ir: provide startup and shutdown hooks [ARM] pxa: lubbock: move mis-placed SPI info [ARM] 4970/1: tosa: correct gpio used for wake up. [ARM] 4966/1: magician: add MFP pin configuration ...
Diffstat (limited to 'include/asm-arm/arch-s3c2410/system-reset.h')
-rw-r--r--include/asm-arm/arch-s3c2410/system-reset.h64
1 files changed, 64 insertions, 0 deletions
diff --git a/include/asm-arm/arch-s3c2410/system-reset.h b/include/asm-arm/arch-s3c2410/system-reset.h
new file mode 100644
index 000000000000..1615bce0c026
--- /dev/null
+++ b/include/asm-arm/arch-s3c2410/system-reset.h
@@ -0,0 +1,64 @@
+/* linux/include/asm-arm/arch-s3c2410/system-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 <asm/hardware.h>
+#include <asm/io.h>
+
+#include <asm/plat-s3c/regs-watchdog.h>
+#include <asm/arch/regs-clock.h>
+
+#include <linux/clk.h>
+#include <linux/err.h>
+
+extern void (*s3c24xx_reset_hook)(void);
+
+static void
+arch_reset(char mode)
+{
+ struct clk *wdtclk;
+
+ if (mode == 's') {
+ cpu_reset(0);
+ }
+
+ if (s3c24xx_reset_hook)
+ s3c24xx_reset_hook();
+
+ 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);
+
+ /* we'll take a jump through zero as a poor second */
+ cpu_reset(0);
+}