On Fri, 28 Oct 2022, Marcus Folkesson wrote:
> The PMIC does store the power-off factor internally.
> Read it out and report it as bootstatus.
>
> Signed-off-by: Marcus Folkesson <marcus.folkesson@xxxxxxxxx>
> ---
> drivers/watchdog/rn5t618_wdt.c | 12 ++++++++++++
> include/linux/mfd/rn5t618.h | 9 +++++++++
Acked-by: Lee Jones <lee@xxxxxxxxxx>
> 2 files changed, 21 insertions(+)
>
> 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);
> diff --git a/include/linux/mfd/rn5t618.h b/include/linux/mfd/rn5t618.h
> index 8aa0bda1af4f..aacb6d51e99c 100644
> --- a/include/linux/mfd/rn5t618.h
> +++ b/include/linux/mfd/rn5t618.h
> @@ -227,6 +227,15 @@
> #define RN5T618_WATCHDOG_WDOGTIM_S 0
> #define RN5T618_PWRIRQ_IR_WDOG BIT(6)
>
> +#define RN5T618_POFFHIS_PWRON BIT(0)
> +#define RN5T618_POFFHIS_TSHUT BIT(1)
> +#define RN5T618_POFFHIS_VINDET BIT(2)
> +#define RN5T618_POFFHIS_IODET BIT(3)
> +#define RN5T618_POFFHIS_CPU BIT(4)
> +#define RN5T618_POFFHIS_WDG BIT(5)
> +#define RN5T618_POFFHIS_DCLIM BIT(6)
> +#define RN5T618_POFFHIS_N_OE BIT(7)
> +
> enum {
> RN5T618_DCDC1,
> RN5T618_DCDC2,
--
Lee Jones [李琼斯]
