This callback will provide the current time left.
Signed-off-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
---
drivers/watchdog/lantiq_wdt.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/watchdog/lantiq_wdt.c b/drivers/watchdog/lantiq_wdt.c
index 666db382b824..3aac61ef855a 100644
--- a/drivers/watchdog/lantiq_wdt.c
+++ b/drivers/watchdog/lantiq_wdt.c
@@ -46,6 +46,8 @@
#define LTQ_WDT_CR_CLKDIV (0x3 << 24) /* set clock divider to 0x40000 */
#define LTQ_WDT_CR_PW_MASK GENMASK(23, 16) /* Password field */
#define LTQ_WDT_CR_RELOAD_MASK GENMASK(15, 0) /* Reload value */
+#define LTQ_WDT_SR 0x8 /* watchdog status register */
+#define LTQ_WDT_SR_VALUE_MASK GENMASK(15, 0) /* Timer value */
#define LTQ_WDT_DIVIDER 0x40000
@@ -135,11 +137,21 @@ 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_bootstatus_xrx(struct device *dev)
--
2.11.0
