watchdog: imx7ulp: Watchdog should continue running for wait/stop mode (0cfbe179) · Commits · 戴 / test

When kernel idle, system will enter wait/stop mode, wdog should continue running in this scenario, and the refresh thread can wake up system from wait/stop mode. Signed-off-by:

Anson Huang <Anson.Huang@nxp.com> Reviewed-by:

Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/1596150213-31638-2-git-send-email-Anson.Huang@nxp.com Signed-off-by:

Guenter Roeck <linux@roeck-us.net> Signed-off-by:

Wim Van Sebroeck <wim@linux-watchdog.org>

drivers/watchdog/imx7ulp_wdt.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -22,6 +22,8 @@
		#define WDOG_CS_CLK (LPO_CLK << LPO_CLK_SHIFT)
		#define WDOG_CS_EN BIT(7)
		#define WDOG_CS_UPDATE BIT(5)
		#define WDOG_CS_WAIT BIT(1)
		#define WDOG_CS_STOP BIT(0)

		#define WDOG_CNT 0x4
		#define WDOG_TOVAL 0x8
		@@ -187,7 +189,8 @@ static int imx7ulp_wdt_init(void __iomem *base, unsigned int timeout)
		/* set an initial timeout value in TOVAL */
		writel(timeout, base + WDOG_TOVAL);
		/* enable 32bit command sequence and reconfigure */
		val = WDOG_CS_CMD32EN \| WDOG_CS_CLK \| WDOG_CS_UPDATE;
		val = WDOG_CS_CMD32EN \| WDOG_CS_CLK \| WDOG_CS_UPDATE \|
		WDOG_CS_WAIT \| WDOG_CS_STOP;
		writel(val, base + WDOG_CS);
		imx7ulp_wdt_wait(base, WDOG_CS_RCS);

Admin message