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Blackfin: reset watchdog in udelay()

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All arches apparently should reset the watchdog in their udelay loop as
noted on the mailing list recently:

  > A comment in flash_status_check() suggests that udelay() is
  > expected to reset the watchdog, but I can't find any architecture
  > where it does.

  If this is missing in other architectures, it should be fixed at the
  root cause, i. e. in udelay() or in the respective support routines.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2009-10-09 02:24:33 -04:00
parent 370ec73455
commit 1f003cf473
1 changed files with 3 additions and 0 deletions
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3
cpu/blackfin/interrupts.c
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@ -20,6 +20,7 @@
#include <common.h> #include <common.h>
#include <config.h> #include <config.h>
#include <watchdog.h>
#include <asm/blackfin.h> #include <asm/blackfin.h>
#include "cpu.h" #include "cpu.h"
@ -70,6 +71,8 @@ void udelay(unsigned long usec)
cclk = (CONFIG_CCLK_HZ); cclk = (CONFIG_CCLK_HZ);
while (usec > 1) { while (usec > 1) {
WATCHDOG_RESET();
/* /*
* how many clock ticks to delay? * how many clock ticks to delay?
* - request(in useconds) * clock_ticks(Hz) / useconds/second * - request(in useconds) * clock_ticks(Hz) / useconds/second