]> pilppa.com Git - linux-2.6-omap-h63xx.git/commitdiff
[ARM] 4722/1: S3C24XX: Improve output if watchdog reset fails
authorBen Dooks <ben-linux@fluff.org>
Sun, 23 Dec 2007 02:09:32 +0000 (03:09 +0100)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Mon, 28 Jan 2008 13:20:49 +0000 (13:20 +0000)
If the watchdog reset fails and we decided to take the jump
to zero approach, allow 50ms for the UARTS to drain the FIFOs
before calling into a bootloader that may flush the output.

Also reduece the waits and the timeout values as 5 seconds is
rather long.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
include/asm-arm/arch-s3c2410/system.h

index cb9cd9fb86110a666882bafe448e8f750f3f57a0..14de4e596f87b170661faad4cabe21deeb7019aa 100644 (file)
@@ -82,18 +82,21 @@ arch_reset(char mode)
                printk(KERN_WARNING "%s: warning: cannot get watchdog clock\n", __func__);
 
        /* put initial values into count and data */
-       __raw_writel(0x100, S3C2410_WTCNT);
-       __raw_writel(0x100, S3C2410_WTDAT);
+       __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(5000);
+       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);
 }