diff options
| author | Yang Xiwen <forbidden405@outlook.com> | 2024-02-21 12:56:41 +0100 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@linux-watchdog.org> | 2024-03-03 14:17:30 +0100 |
| commit | 575f100c1cce1486f581baefa97dde15b48728c7 (patch) | |
| tree | 0e05543a2363134b45a20988b2badbc9044a1a1f /drivers/watchdog | |
| parent | watchdog/hpwdt: Support Suspend and Resume (diff) | |
| download | linux-575f100c1cce1486f581baefa97dde15b48728c7.tar.xz linux-575f100c1cce1486f581baefa97dde15b48728c7.zip | |
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: Yang Xiwen <forbidden405@outlook.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20240221-hisi-wdt-v3-1-9642613dc2e6@outlook.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/sp805_wdt.c | 8 |
1 files changed, 8 insertions, 0 deletions
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; |