Hi, On Sat, 28 Sep 2013 21:19:19 -0300 Otavio Salvador <ota...@ossystems.com.br> wrote:
> I am trying to add support for watchdog in one board and it is not > working as expected. > > I did add the: > > #define CONFIG_HW_WATCHDOG > #define CONFIG_IMX_WATCHDOG > > into the board config file. > > Into the board .c file, I added: > > int board_late_init(void) > { > ... > #ifdef CONFIG_HW_WATCHDOG > hw_watchdog_init(); > #endif > > return 0; > } > > and the hw_watchdog_init is indeed called. > > It starts booting and shows: > > U-Boot 2013.10-rc3-00046-gc1c2434-dirty (Sep 28 2013 - 21:12:53) > > CPU: Freescale i.MX6Q rev1.2 at 792 MHz > Reset cause: WDOG > Board: yyyy > DRAM: 1 GiB > MMC: FSL_SDHC: 0, FSL_SDHC: 1 > In: serial > Out: serial > Err: serial > Net:� > > and it in fact resets. > > I am booting the board from USB loader. May it be an issue? No, it shouldn't be an issue. Does the attached patch help? Thanks, Anatolij
>From 394344a469ea18234adc8f611925e41bc532e230 Mon Sep 17 00:00:00 2001 From: Anatolij Gustschin <ag...@denx.de> Date: Tue, 16 Apr 2013 11:01:54 +0200 Subject: [PATCH] imx_watchdog: do not soft-reset while watchdog init Currently the driver clears WCR_SRS bit when enabling the watchdog and this causes a software reset. Do not clear WCR_SRS. Signed-off-by: Anatolij Gustschin <ag...@denx.de> --- drivers/watchdog/imx_watchdog.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/watchdog/imx_watchdog.c b/drivers/watchdog/imx_watchdog.c index 50e602a..d5993b4 100644 --- a/drivers/watchdog/imx_watchdog.c +++ b/drivers/watchdog/imx_watchdog.c @@ -19,6 +19,7 @@ struct watchdog_regs { #define WCR_WDBG 0x02 #define WCR_WDE 0x04 /* WDOG enable */ #define WCR_WDT 0x08 +#define WCR_SRS 0x10 #define WCR_WDW 0x80 #define SET_WCR_WT(x) (x << 8) @@ -45,7 +46,7 @@ void hw_watchdog_init(void) #define CONFIG_WATCHDOG_TIMEOUT_MSECS 128000 #endif timeout = (CONFIG_WATCHDOG_TIMEOUT_MSECS / 500) - 1; - writew(WCR_WDZST | WCR_WDBG | WCR_WDE | WCR_WDT | + writew(WCR_WDZST | WCR_WDBG | WCR_WDE | WCR_WDT | WCR_SRS | WCR_WDW | SET_WCR_WT(timeout), &wdog->wcr); hw_watchdog_reset(); } -- 1.7.9.5
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