diff options
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/imx_watchdog.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/drivers/watchdog/imx_watchdog.c b/drivers/watchdog/imx_watchdog.c index 05bbfe0..c030360 100644 --- a/drivers/watchdog/imx_watchdog.c +++ b/drivers/watchdog/imx_watchdog.c @@ -15,15 +15,23 @@ #endif #include <fsl_wdog.h> -static void imx_watchdog_expire_now(struct watchdog_regs *wdog) +static void imx_watchdog_expire_now(struct watchdog_regs *wdog, bool ext_reset) { - clrsetbits_le16(&wdog->wcr, WCR_WT_MSK, WCR_WDE); + u16 wcr = WCR_WDE; + + if (ext_reset) + wcr |= WCR_SRS; /* do not assert internal reset */ + else + wcr |= WCR_WDA; /* do not assert external reset */ + + /* Write 3 times to ensure it works, due to IMX6Q errata ERR004346 */ + writew(wcr, &wdog->wcr); + writew(wcr, &wdog->wcr); + writew(wcr, &wdog->wcr); - writew(0x5555, &wdog->wsr); - writew(0xaaaa, &wdog->wsr); /* load minimum 1/2 second timeout */ while (1) { /* - * spin for .5 seconds before reset + * spin before reset */ } } @@ -34,7 +42,7 @@ void __attribute__((weak)) reset_cpu(ulong addr) { struct watchdog_regs *wdog = (struct watchdog_regs *)WDOG1_BASE_ADDR; - imx_watchdog_expire_now(wdog); + imx_watchdog_expire_now(wdog, true); } #endif @@ -106,7 +114,7 @@ static int imx_wdt_expire_now(struct udevice *dev, ulong flags) { struct imx_wdt_priv *priv = dev_get_priv(dev); - imx_watchdog_expire_now(priv->base); + imx_watchdog_expire_now(priv->base, priv->ext_reset); hang(); return 0; |