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| author | Marcus Folkesson <marcus.folkesson@gmail.com> | 2022-10-28 09:50:19 +0200 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@linux-watchdog.org> | 2022-11-19 15:30:40 +0100 |
| commit | 47c008050aec3e9a13af29dd74cd8b4c112bc07b (patch) | |
| tree | 6f291822b54a36899105c459e54cf0c5b090843e /drivers/watchdog | |
| parent | 758f46c2e67c4901ea49e684e12adb698b1b2bbd (diff) | |
| download | linux-47c008050aec3e9a13af29dd74cd8b4c112bc07b.tar.gz linux-47c008050aec3e9a13af29dd74cd8b4c112bc07b.tar.bz2 linux-47c008050aec3e9a13af29dd74cd8b4c112bc07b.zip | |
watchdog: rn5t618: add support for read out bootstatus
The PMIC does store the power-off factor internally.
Read it out and report it as bootstatus.
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Acked-by: Lee Jones <lee@kernel.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20221028075019.2757812-1-marcus.folkesson@gmail.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/rn5t618_wdt.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/watchdog/rn5t618_wdt.c b/drivers/watchdog/rn5t618_wdt.c index 6e524c8e26a8..40d8ebd8c0ac 100644 --- a/drivers/watchdog/rn5t618_wdt.c +++ b/drivers/watchdog/rn5t618_wdt.c @@ -144,6 +144,8 @@ static int rn5t618_wdt_probe(struct platform_device *pdev) struct rn5t618 *rn5t618 = dev_get_drvdata(dev->parent); struct rn5t618_wdt *wdt; int min_timeout, max_timeout; + int ret; + unsigned int val; wdt = devm_kzalloc(dev, sizeof(struct rn5t618_wdt), GFP_KERNEL); if (!wdt) @@ -160,6 +162,16 @@ static int rn5t618_wdt_probe(struct platform_device *pdev) wdt->wdt_dev.timeout = max_timeout; wdt->wdt_dev.parent = dev; + /* Read out previous power-off factor */ + ret = regmap_read(wdt->rn5t618->regmap, RN5T618_POFFHIS, &val); + if (ret) + return ret; + + if (val & RN5T618_POFFHIS_VINDET) + wdt->wdt_dev.bootstatus = WDIOF_POWERUNDER; + else if (val & RN5T618_POFFHIS_WDG) + wdt->wdt_dev.bootstatus = WDIOF_CARDRESET; + watchdog_set_drvdata(&wdt->wdt_dev, wdt); watchdog_init_timeout(&wdt->wdt_dev, timeout, dev); watchdog_set_nowayout(&wdt->wdt_dev, nowayout); |