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watchdog: armada_37xx_wdt: use do_div for u64 division 

When the driver is built on 32 bit architectures during compile test,
the linker complains about "__udivdi3" being undefined. We have to use
do_div macro instead of the division operator when dividing u64 value.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Marek Behún 2018-10-10 17:17:27 +02:00 committed by Wim Van Sebroeck
parent cd69606ad0
commit c8ca6e70fb
1 changed files with 5 additions and 4 deletions
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9
drivers/watchdog/armada_37xx_wdt.c
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@ -156,10 +156,10 @@ static int armada_37xx_wdt_ping(struct watchdog_device *wdt)
static unsigned int armada_37xx_wdt_get_timeleft(struct watchdog_device *wdt)
{
struct armada_37xx_watchdog *dev = watchdog_get_drvdata(wdt);
unsigned int res;
u64 res;
res = get_counter_value(dev, CNTR_ID_WDOG) *
CNTR_CTRL_PRESCALE_MIN / dev->clk_rate;
res = get_counter_value(dev, CNTR_ID_WDOG) * CNTR_CTRL_PRESCALE_MIN;
do_div(res, dev->clk_rate);
return res;
}
@ -176,7 +176,8 @@ static int armada_37xx_wdt_set_timeout(struct watchdog_device *wdt,
* prescaler, which divides the clock rate by 2
* (CNTR_CTRL_PRESCALE_MIN).
*/
dev->timeout = (u64)dev->clk_rate * timeout / CNTR_CTRL_PRESCALE_MIN;
dev->timeout = (u64)dev->clk_rate * timeout;
do_div(dev->timeout, CNTR_CTRL_PRESCALE_MIN);
return 0;
}