diff options
| author | Anson Huang <Anson.Huang@nxp.com> | 2020-07-31 07:03:33 +0800 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@linux-watchdog.org> | 2020-10-14 15:02:26 +0200 |
| commit | 0cfbe17959b69896a72dffbc2d37280859b0d086 (patch) | |
| tree | 05ba82dd2e3db3444b48836fbbcfee65f52616db /drivers/watchdog | |
| parent | d342951bcda6cd190309138385d5935ab1d08f92 (diff) | |
| download | linux-0cfbe17959b69896a72dffbc2d37280859b0d086.tar.gz | |
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.c | 5 |
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); |