Maximum and minimum timeout values depend on the actual input clock frequency and prescaler selection. Signed-off-by: Tomas Melin <tomas.melin@xxxxxxxxxxx> --- drivers/watchdog/cadence_wdt.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/drivers/watchdog/cadence_wdt.c b/drivers/watchdog/cadence_wdt.c index 415bd6dd1edb..87b767c87bb6 100644 --- a/drivers/watchdog/cadence_wdt.c +++ b/drivers/watchdog/cadence_wdt.c @@ -18,9 +18,6 @@ #include <linux/watchdog.h> #define CDNS_WDT_DEFAULT_TIMEOUT 10 -/* Supports 1 - 516 sec */ -#define CDNS_WDT_MIN_TIMEOUT 1 -#define CDNS_WDT_MAX_TIMEOUT 516 /* Restart key */ #define CDNS_WDT_RESTART_KEY 0x00001999 @@ -28,6 +25,10 @@ /* Counter register access key */ #define CDNS_WDT_REGISTER_ACCESS_KEY 0x00920000 +/* Counter control register, counter restart values */ +#define CDNS_WDT_CCR_CRV_MIN 0xFFF +#define CDNS_WDT_CCR_CRV_MAX 0xFFFFFF + /* Counter value divisor */ #define CDNS_WDT_COUNTER_VALUE_DIVISOR 0x1000 @@ -315,8 +316,10 @@ static int cdns_wdt_probe(struct platform_device *pdev) cdns_wdt_device->info = &cdns_wdt_info; cdns_wdt_device->ops = &cdns_wdt_ops; cdns_wdt_device->timeout = CDNS_WDT_DEFAULT_TIMEOUT; - cdns_wdt_device->min_timeout = CDNS_WDT_MIN_TIMEOUT; - cdns_wdt_device->max_timeout = CDNS_WDT_MAX_TIMEOUT; + cdns_wdt_device->min_timeout = + CDNS_WDT_CCR_CRV_MIN * wdt->prescaler / clock_f; + cdns_wdt_device->max_timeout = + CDNS_WDT_CCR_CRV_MAX * wdt->prescaler / clock_f; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); wdt->regs = devm_ioremap_resource(&pdev->dev, res); -- 2.17.2
