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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>
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@ -144,6 +144,8 @@ static int rn5t618_wdt_probe(struct platform_device *pdev)
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struct rn5t618 *rn5t618 = dev_get_drvdata(dev->parent);
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struct rn5t618_wdt *wdt;
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int min_timeout, max_timeout;
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int ret;
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unsigned int val;
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wdt = devm_kzalloc(dev, sizeof(struct rn5t618_wdt), GFP_KERNEL);
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if (!wdt)
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@ -160,6 +162,16 @@ static int rn5t618_wdt_probe(struct platform_device *pdev)
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wdt->wdt_dev.timeout = max_timeout;
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wdt->wdt_dev.parent = dev;
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/* Read out previous power-off factor */
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ret = regmap_read(wdt->rn5t618->regmap, RN5T618_POFFHIS, &val);
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if (ret)
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return ret;
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if (val & RN5T618_POFFHIS_VINDET)
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wdt->wdt_dev.bootstatus = WDIOF_POWERUNDER;
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else if (val & RN5T618_POFFHIS_WDG)
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wdt->wdt_dev.bootstatus = WDIOF_CARDRESET;
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watchdog_set_drvdata(&wdt->wdt_dev, wdt);
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watchdog_init_timeout(&wdt->wdt_dev, timeout, dev);
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watchdog_set_nowayout(&wdt->wdt_dev, nowayout);
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@ -227,6 +227,15 @@
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#define RN5T618_WATCHDOG_WDOGTIM_S 0
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#define RN5T618_PWRIRQ_IR_WDOG BIT(6)
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#define RN5T618_POFFHIS_PWRON BIT(0)
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#define RN5T618_POFFHIS_TSHUT BIT(1)
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#define RN5T618_POFFHIS_VINDET BIT(2)
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#define RN5T618_POFFHIS_IODET BIT(3)
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#define RN5T618_POFFHIS_CPU BIT(4)
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#define RN5T618_POFFHIS_WDG BIT(5)
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#define RN5T618_POFFHIS_DCLIM BIT(6)
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#define RN5T618_POFFHIS_N_OE BIT(7)
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enum {
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RN5T618_DCDC1,
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RN5T618_DCDC2,
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