The i.MX can be fused to start the watchdog on power-on reset. To give users an easy way to determine whether the watchdog is running, implement support for WDOG_HW_RUNNING. Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx> --- drivers/watchdog/imxwd.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/watchdog/imxwd.c b/drivers/watchdog/imxwd.c index 77a3bd76cefa..eb4f2c16c60a 100644 --- a/drivers/watchdog/imxwd.c +++ b/drivers/watchdog/imxwd.c @@ -28,6 +28,7 @@ struct imx_wd_ops { int (*set_timeout)(struct imx_wd *, unsigned); void (*soc_reset)(struct imx_wd *); int (*init)(struct imx_wd *); + bool (*is_running)(struct imx_wd *); unsigned int timeout_max; }; @@ -111,6 +112,11 @@ static void imx1_soc_reset(struct imx_wd *priv) writew(IMX1_WDOG_WCR_WDE, priv->base + IMX1_WDOG_WCR); } +static inline bool imx21_watchdog_is_running(struct imx_wd *priv) +{ + return imxwd_read(priv, IMX21_WDOG_WCR) & IMX21_WDOG_WCR_WDE; +} + static int imx21_watchdog_set_timeout(struct imx_wd *priv, unsigned timeout) { u16 val; @@ -243,6 +249,12 @@ static int imx_wd_probe(struct device_d *dev) "fsl,ext-reset-output"); if (IS_ENABLED(CONFIG_WATCHDOG_IMX)) { + if (priv->ops->is_running) { + set_bit(WDOG_HW_RUNNING, &priv->wd.status_supported); + if (priv->ops->is_running(priv)) + set_bit(WDOG_HW_RUNNING, &priv->wd.status); + } + ret = watchdog_register(&priv->wd); if (ret) goto on_error; @@ -277,6 +289,7 @@ static const struct imx_wd_ops imx21_wd_ops = { .set_timeout = imx21_watchdog_set_timeout, .soc_reset = imx21_soc_reset, .init = imx21_wd_init, + .is_running = imx21_watchdog_is_running, .timeout_max = 128, }; -- 2.24.0.rc1 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox