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watchdog: lantiq: add get_timeleft callback 

This callback will provide the current time left.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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:
Hauke Mehrtens 2018-09-13 23:32:11 +02:00 committed by Wim Van Sebroeck
parent dcd7e04e8e
commit c99d9df1d3
1 changed files with 11 additions and 0 deletions
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11
drivers/watchdog/lantiq_wdt.c
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@ -50,6 +50,7 @@
#define LTQ_WDT_CR_MAX_TIMEOUT ((1 << 16) - 1) /* The reload field is 16 bit */
#define LTQ_WDT_SR 0x8 /* watchdog status register */
#define LTQ_WDT_SR_EN BIT(31) /* Enable */
#define LTQ_WDT_SR_VALUE_MASK GENMASK(15, 0) /* Timer value */
#define LTQ_WDT_DIVIDER 0x40000
@ -139,11 +140,21 @@ static int ltq_wdt_ping(struct watchdog_device *wdt)
return 0;
}
static unsigned int ltq_wdt_get_timeleft(struct watchdog_device *wdt)
{
struct ltq_wdt_priv *priv = ltq_wdt_get_priv(wdt);
u64 timeout;
timeout = ltq_wdt_r32(priv, LTQ_WDT_SR) & LTQ_WDT_SR_VALUE_MASK;
return do_div(timeout, priv->clk_rate);
}
static const struct watchdog_ops ltq_wdt_ops = {
.owner = THIS_MODULE,
.start = ltq_wdt_start,
.stop = ltq_wdt_stop,
.ping = ltq_wdt_ping,
.get_timeleft = ltq_wdt_get_timeleft,
};
static int ltq_wdt_xrx_bootstatus_get(struct device *dev)