From: Yang Xiwen <forbidden405@xxxxxxxxxxx> According to the datasheet, the core has an WDOGRESn input signal that needs to be deasserted before being operational. Implement it in the driver. Signed-off-by: Yang Xiwen <forbidden405@xxxxxxxxxxx> --- drivers/watchdog/sp805_wdt.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c index 2756ed54ca3d..b4bcfdeb39e6 100644 --- a/drivers/watchdog/sp805_wdt.c +++ b/drivers/watchdog/sp805_wdt.c @@ -25,6 +25,7 @@ #include <linux/moduleparam.h> #include <linux/pm.h> #include <linux/property.h> +#include <linux/reset.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/types.h> @@ -59,6 +60,7 @@ * @lock: spin lock protecting dev structure and io access * @base: base address of wdt * @clk: (optional) clock structure of wdt + * @rst: (optional) reset control signal of wdt * @rate: (optional) clock rate when provided via properties * @adev: amba device structure of wdt * @status: current status of wdt @@ -69,6 +71,7 @@ struct sp805_wdt { spinlock_t lock; void __iomem *base; struct clk *clk; + struct reset_control *rst; u64 rate; struct amba_device *adev; unsigned int load_val; @@ -264,6 +267,12 @@ sp805_wdt_probe(struct amba_device *adev, const struct amba_id *id) return -ENODEV; } + wdt->rst = devm_reset_control_get_optional(&adev->dev, NULL); + if (IS_ERR(wdt->rst)) + return dev_err_probe(&adev->dev, PTR_ERR(wdt->rst), "Can not get reset\n"); + + reset_control_deassert(wdt->rst); + wdt->adev = adev; wdt->wdd.info = &wdt_info; wdt->wdd.ops = &wdt_ops; -- 2.43.0