| /* 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/clock.h> |
| #include <plat/regs-watchdog.h> |
| #include <mach/map.h> |
| |
| #include <linux/clk.h> |
| #include <linux/err.h> |
| #include <linux/io.h> |
| #include <linux/delay.h> |
| |
| static inline void arch_wdt_reset(void) |
| { |
| printk("arch_reset: attempting watchdog reset\n"); |
| |
| __raw_writel(0, S3C2410_WTCON); /* disable watchdog, to be safe */ |
| |
| if (s3c2410_wdtclk) |
| clk_enable(s3c2410_wdtclk); |
| |
| /* 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); |
| } |
