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| author | Hauke Mehrtens <hauke@hauke-m.de> | 2018-09-13 23:32:11 +0200 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@linux-watchdog.org> | 2018-10-02 13:32:27 +0200 |
| commit | c99d9df1d3c312759c43a3da0d2f17b4aecc05c8 (patch) | |
| tree | 79787f7b6b0139851d1d6055b0eaeb099882bba0 /drivers/watchdog/lantiq_wdt.c | |
| parent | watchdog: lantiq: Convert to watchdog_device (diff) | |
| download | linux-c99d9df1d3c312759c43a3da0d2f17b4aecc05c8.tar.xz linux-c99d9df1d3c312759c43a3da0d2f17b4aecc05c8.zip | |
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>
Diffstat (limited to 'drivers/watchdog/lantiq_wdt.c')
| -rw-r--r-- | drivers/watchdog/lantiq_wdt.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/watchdog/lantiq_wdt.c b/drivers/watchdog/lantiq_wdt.c index c2f14d2bd695..83da84d6074b 100644 --- a/drivers/watchdog/lantiq_wdt.c +++ b/drivers/watchdog/lantiq_wdt.c @@ -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) |