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authorAnson Huang <Anson.Huang@nxp.com>2020-07-31 02:03:33 +0300
committerWim Van Sebroeck <wim@linux-watchdog.org>2020-10-14 16:02:26 +0300
commit0cfbe17959b69896a72dffbc2d37280859b0d086 (patch)
tree05ba82dd2e3db3444b48836fbbcfee65f52616db /drivers/watchdog
parentd342951bcda6cd190309138385d5935ab1d08f92 (diff)
downloadlinux-0cfbe17959b69896a72dffbc2d37280859b0d086.tar.xz
watchdog: imx7ulp: Watchdog should continue running for wait/stop mode
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>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/imx7ulp_wdt.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/watchdog/imx7ulp_wdt.c b/drivers/watchdog/imx7ulp_wdt.c
index badfc0be3f85..922b60374295 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
@@ -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);