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| author | Ingo Molnar <mingo@elte.hu> | 2009-08-25 10:04:27 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-08-25 10:04:32 +0200 |
| commit | daedc71836e5a398fd0cc0e12c5cb43539478485 (patch) | |
| tree | c56567a92017679e57195cef992d4a5561c20e0e /drivers/watchdog/coh901327_wdt.c | |
| parent | c36ba80ea01d0aecb652c26799a912e760ce8981 (diff) | |
| parent | 422bef879e84104fee6dc68ded0e371dbeb5f88e (diff) | |
Merge commit 'v2.6.31-rc7' into irq/core
Merge reason: move from an -rc2 base to -rc7.
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 */ |