Add Kconfig option WATCHDOG_RESET_DISABLE to disable watchdog reset
in imx_watchdog driver, so that the watchdog will not be fed in
u-boot if CONFIG_WATCHDOG_RESET_DISABLE is enabled.
Signed-off-by: Xiaoliang Yang <xiaoliang.yan...@nxp.com>
---
arch/arm/cpu/armv8/fsl-layerscape/doc/README.lsch2 | 2 ++
drivers/watchdog/Kconfig | 6 ++++++
drivers/watchdog/imx_watchdog.c | 2 ++
3 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/doc/README.lsch2
b/arch/arm/cpu/armv8/fsl-layerscape/doc/README.lsch2
index 9176546..9583bf7 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/doc/README.lsch2
+++ b/arch/arm/cpu/armv8/fsl-layerscape/doc/README.lsch2
@@ -17,3 +17,5 @@ Use following config to set watchdog timeout, if this config
is not defined,
the default timeout value is 128s which is the maximum. Set 10 seconds for
example:
#define CONFIG_WATCHDOG_TIMEOUT_MSECS 10000
+Set CONFIG_WATCHDOG_RESET_DISABLE to disable reset watchdog, so that the
+watchdog will not be fed in u-boot.
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index d545b3e..d5dbc80 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -11,6 +11,12 @@ config WATCHDOG
config HW_WATCHDOG
bool
+config WATCHDOG_RESET_DISABLE
+ bool "Disable reset watchdog"
+ help
+ Disable reset watchdog, which can let WATCHDOG_RESET invalid, so
+ that the watchdog will not be fed in u-boot.
+
config BCM2835_WDT
bool "Enable BCM2835/2836 watchdog driver"
select HW_WATCHDOG
diff --git a/drivers/watchdog/imx_watchdog.c b/drivers/watchdog/imx_watchdog.c
index ddcf474..14cc618 100644
--- a/drivers/watchdog/imx_watchdog.c
+++ b/drivers/watchdog/imx_watchdog.c
@@ -16,10 +16,12 @@
#ifdef CONFIG_IMX_WATCHDOG
void hw_watchdog_reset(void)
{
+#ifndef CONFIG_WATCHDOG_RESET_DISABLE
struct watchdog_regs *wdog = (struct watchdog_regs *)WDOG1_BASE_ADDR;
writew(0x5555, &wdog->wsr);
writew(0xaaaa, &wdog->wsr);
+#endif /* CONFIG_WATCHDOG_RESET_DISABLE*/
}
void hw_watchdog_init(void)
--
1.7.1
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