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Convert at91 watchdog driver to new SoC access 

This converts the at91 watchdog driver to new c structure
type to access registers of the SoC

Signed-off-by: Achim Ehrlich <aehrlich@taskit.de>
This commit is contained in:
Achim Ehrlich 2010-03-17 14:50:29 +01:00 committed by trix
parent c9f72b3da8
commit f936aa0528
1 changed files with 11 additions and 10 deletions
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21
drivers/watchdog/at91sam9_wdt.c
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@ -42,11 +42,10 @@
static int at91_wdt_settimeout(unsigned int timeout)
{
unsigned int reg;
unsigned int mr;
at91_wdt_t *wd = (at91_wdt_t *) AT91_WDT_BASE;
/* Check if disabled */
mr = at91_sys_read(AT91_WDT_MR);
if (mr & AT91_WDT_WDDIS) {
if (readl(&wd->mr) & AT91_WDT_MR_WDDIS) {
printf("sorry, watchdog is disabled\n");
return -1;
}
@ -57,19 +56,21 @@ static int at91_wdt_settimeout(unsigned int timeout)
* Since WDV is a 12-bit counter, the maximum period is
* 4096 / 256 = 16 seconds.
*/
reg = AT91_WDT_WDRSTEN /* causes watchdog reset */
/* | AT91_WDT_WDRPROC causes processor reset only */
| AT91_WDT_WDDBGHLT /* disabled in debug mode */
| AT91_WDT_WDD /* restart at any time */
| (timeout & AT91_WDT_WDV); /* timer value */
at91_sys_write(AT91_WDT_MR, reg);
reg = AT91_WDT_MR_WDRSTEN /* causes watchdog reset */
| AT91_WDT_MR_WDDBGHLT /* disabled in debug mode */
| AT91_WDT_MR_WDD(0xfff) /* restart at any time */
| AT91_WDT_MR_WDV(timeout); /* timer value */
writel(reg, &wd->mr);
return 0;
}
void hw_watchdog_reset(void)
{
at91_sys_write(AT91_WDT_CR, AT91_WDT_KEY | AT91_WDT_WDRSTT);
at91_wdt_t *wd = (at91_wdt_t *) AT91_WDT_BASE;
writel(AT91_WDT_CR_WDRSTT | AT91_WDT_CR_KEY, &wd->cr);
}
void hw_watchdog_init(void)