diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-08-11 14:19:09 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-08-11 14:19:09 +0200 |
| commit | 89034bc2c7b839702c00a704e79d112737f98be0 (patch) | |
| tree | e65b1f3d4c751baa840efc81bc4734f089379eb3 /drivers/watchdog/coh901327_wdt.c | |
| parent | fb82ad719831db58e9baa4c67015aae3fe27e7e3 (diff) | |
| parent | 85dfd81dc57e8183a277ddd7a56aa65c96f3f487 (diff) | |
Merge branch 'linus' into tracing/core
Conflicts:
kernel/trace/trace_events_filter.c
We use the tracing/core version.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/watchdog/coh901327_wdt.c')
| -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 fecb307d28e9..aec7cefdef21 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 */ |