* Copyright (C) 2000 Deep Blue Solutions Ltd
* Copyright 2006-2007 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright 2008 Juergen Beisert, kernel@pengutronix.de
+ * Copyright 2009 Ilya Yanok, Emcraft Systems Ltd, yanok@emcraft.com
*
* 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
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/io.h>
+#include <linux/err.h>
+#include <linux/delay.h>
#include <mach/hardware.h>
#include <asm/proc-fns.h>
#include <asm/system.h>
-/*
- * Put the CPU into idle mode. It is called by default_idle()
- * in process.c file.
- */
-void arch_idle(void)
-{
- /*
- * This should do all the clock switching
- * and wait for interrupt tricks.
- */
- cpu_do_idle();
-}
-
-#define WDOG_WCR_REG IO_ADDRESS(WDOG_BASE_ADDR)
-#define WDOG_WCR_SRS (1 << 4)
+#ifdef CONFIG_ARCH_MX1
+#define WDOG_WCR_REG IO_ADDRESS(WDT_BASE_ADDR)
+#define WDOG_WCR_ENABLE (1 << 0)
+#else
+#define WDOG_WCR_REG IO_ADDRESS(WDOG_BASE_ADDR)
+#define WDOG_WCR_ENABLE (1 << 2)
+#endif
/*
* Reset the system. It is called by machine_restart().
*/
void arch_reset(char mode, const char *cmd)
{
- struct clk *clk;
+ if (!cpu_is_mx1()) {
+ struct clk *clk;
- clk = clk_get(NULL, "wdog_clk");
- if (!clk) {
- printk(KERN_ERR"Cannot activate the watchdog. Giving up\n");
- return;
+ clk = clk_get_sys("imx-wdt.0", NULL);
+ if (!IS_ERR(clk))
+ clk_enable(clk);
}
- clk_enable(clk);
-
/* Assert SRS signal */
- __raw_writew(__raw_readw(WDOG_WCR_REG) & ~WDOG_WCR_SRS, WDOG_WCR_REG);
+ __raw_writew(WDOG_WCR_ENABLE, WDOG_WCR_REG);
+
+ /* 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);
}