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[2/2] watchdog: imx7ulp: Watchdog should continue running for wait/stop mode

Message ID 1595918567-2017-2-git-send-email-Anson.Huang@nxp.com (mailing list archive)
State New, archived
Headers show
Series [1/2] watchdog: imx7ulp: Strictly follow the sequence for wdog operations | expand

Commit Message

Anson Huang July 28, 2020, 6:42 a.m. UTC 
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>
---
 drivers/watchdog/imx7ulp_wdt.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/watchdog/imx7ulp_wdt.c b/drivers/watchdog/imx7ulp_wdt.c
index b414ecf..271a2e4 100644
--- a/drivers/watchdog/imx7ulp_wdt.c
+++ b/drivers/watchdog/imx7ulp_wdt.c
@@ -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
@@ -174,7 +176,8 @@  static void 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);
 	local_irq_enable();