diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-08-02 14:15:46 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-08-02 14:15:46 -0700 |
| commit | 4905f92ed752d49ebe9cce4fe78a4bc39e710523 (patch) | |
| tree | 533cdb174d61a92033083b027e0b34981fc42130 | |
| parent | 0ce166b7b46122bf91a4766e20c85a6485448765 (diff) | |
| parent | 5973bee46fe66db94fab198979dec87f263fc2a8 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
[WATCHDOG] Fix COH 901 327 watchdog enablement
| -rw-r--r-- | drivers/watchdog/coh901327_wdt.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/watchdog/coh901327_wdt.c b/drivers/watchdog/coh901327_wdt.c index fecb307d28e..aec7cefdef2 100644 --- a/drivers/watchdog/coh901327_wdt.c +++ b/drivers/watchdog/coh901327_wdt.c @@ -18,6 +18,7 @@ #include <linux/bitops.h> #include <linux/uaccess.h> #include <linux/clk.h> +#include <linux/delay.h> #define DRV_NAME "WDOG COH 901 327" @@ -92,6 +93,8 @@ static struct clk *clk; static void coh901327_enable(u16 timeout) { u16 val; + unsigned long freq; + unsigned long delay_ns; clk_enable(clk); /* Restart timer if it is disabled */ @@ -102,6 +105,14 @@ static void coh901327_enable(u16 timeout) /* Acknowledge any pending interrupt so it doesn't just fire off */ writew(U300_WDOG_IER_WILL_BARK_IRQ_ACK_ENABLE, virtbase + U300_WDOG_IER); + /* + * The interrupt is cleared in the 32 kHz clock domain. + * Wait 3 32 kHz cycles for it to take effect + */ + freq = clk_get_rate(clk); + delay_ns = (1000000000 + freq - 1) / freq; /* Freq to ns and round up */ + delay_ns = 3 * delay_ns; /* Wait 3 cycles */ + ndelay(delay_ns); /* Enable the watchdog interrupt */ writew(U300_WDOG_IMR_WILL_BARK_IRQ_ENABLE, virtbase + U300_WDOG_IMR); /* Activate the watchdog timer */ |