Commit 575f100c authored by Yang Xiwen's avatar Yang Xiwen Committed by Wim Van Sebroeck
Browse files

watchdog: sp805_wdt: deassert the reset if available 



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: default avatarYang Xiwen <forbidden405@outlook.com>
Reviewed-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20240221-hisi-wdt-v3-1-9642613dc2e6@outlook.com


Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarWim Van Sebroeck <wim@linux-watchdog.org>
parent 12b8ab42

drivers/watchdog/sp805_wdt.c

+8 −0
Original line number Diff line number Diff line
@@ -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;