On Thu, Sep 13, 2018 at 11:32:11PM +0200, Hauke Mehrtens wrote:
> This callback will provide the current time left.
>
> Signed-off-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
> ---
> drivers/watchdog/lantiq_wdt.c | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> 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)
> --
> 2.11.0
>
