Commit 47c00805 authored by Marcus Folkesson's avatar Marcus Folkesson Committed by Wim Van Sebroeck
Browse files

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: default avatarMarcus Folkesson <marcus.folkesson@gmail.com>
Acked-by: default avatarLee Jones <lee@kernel.org>
Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20221028075019.2757812-1-marcus.folkesson@gmail.com


Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarWim Van Sebroeck <wim@linux-watchdog.org>
parent 758f46c2

drivers/watchdog/rn5t618_wdt.c

+12 −0
Original line number Diff line number Diff line
@@ -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);

include/linux/mfd/rn5t618.h

+9 −0
Original line number Diff line number Diff line
@@ -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,