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 | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c
index 2756ed54ca3d..109e2e37e8f0 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>
@@ -232,6 +233,7 @@ static int
sp805_wdt_probe(struct amba_device *adev, const struct amba_id *id)
{
struct sp805_wdt *wdt;
+ struct reset_control *rst;
u64 rate = 0;
int ret = 0;
@@ -264,6 +266,12 @@ sp805_wdt_probe(struct amba_device *adev, const struct amba_id *id)
return -ENODEV;
}
+ rst = devm_reset_control_get_optional_exclusive(&adev->dev, NULL);
+ if (IS_ERR(rst))
+ return dev_err_probe(&adev->dev, PTR_ERR(rst), "Can not get reset\n");
+
+ reset_control_deassert(rst);
+
wdt->adev = adev;
wdt->wdd.info = &wdt_info;
wdt->wdd.ops = &wdt_ops;
--
2.43.0
