Support watchdog driver for layerscape. If you want to use it, please define CONFIG_IMX_WATCHDOG, CONFIG_HW_WATCHDOG, define CONFIG_WATCHDOG_TIMEOUT_MSECS to set watchdog timeout.
Signed-off-by: Xiaoliang Yang xiaoliang.yang_1@nxp.com --- arch/arm/cpu/armv8/fsl-layerscape/doc/README.lsch2 | 10 ++++++++++ drivers/watchdog/Makefile | 2 +- drivers/watchdog/imx_watchdog.c | 11 +++++++++++ 3 files changed, 22 insertions(+), 1 deletions(-)
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/doc/README.lsch2 b/arch/arm/cpu/armv8/fsl-layerscape/doc/README.lsch2 index a6ef830..87b91eb 100644 --- a/arch/arm/cpu/armv8/fsl-layerscape/doc/README.lsch2 +++ b/arch/arm/cpu/armv8/fsl-layerscape/doc/README.lsch2 @@ -8,3 +8,13 @@ Freescale LayerScape with Chassis Generation 2
This architecture supports Freescale ARMv8 SoCs with Chassis generation 2, for example LS1043A. + +Watchdog support Overview +------------------- +Support watchdog driver for Layerscape. Use following configs to enable it: + #define CONFIG_IMX_WATCHDOG + #define CONFIG_HW_WATCHDOG +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 diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile index f405f51..4835b27 100644 --- a/drivers/watchdog/Makefile +++ b/drivers/watchdog/Makefile @@ -5,7 +5,7 @@
obj-$(CONFIG_AT91SAM9_WATCHDOG) += at91sam9_wdt.o obj-$(CONFIG_FTWDT010_WATCHDOG) += ftwdt010_wdt.o -ifneq (,$(filter $(SOC), mx31 mx35 mx5 mx6 mx7 vf610)) +ifneq (,$(filter $(SOC), mx31 mx35 mx5 mx6 mx7 vf610 fsl-layerscape)) obj-y += imx_watchdog.o endif obj-$(CONFIG_S5P) += s5p_wdt.o diff --git a/drivers/watchdog/imx_watchdog.c b/drivers/watchdog/imx_watchdog.c index 3f826d1..3ad4e55 100644 --- a/drivers/watchdog/imx_watchdog.c +++ b/drivers/watchdog/imx_watchdog.c @@ -8,6 +8,13 @@ #include <asm/io.h> #include <watchdog.h> #include <asm/arch/imx-regs.h> +#ifdef CONFIG_FSL_LAYERSCAPE +#ifdef CONFIG_FSL_LSCH3 +#include <asm/arch/immap_lsch3.h> +#elif defined(CONFIG_FSL_LSCH2) +#include <asm/arch/immap_lsch2.h> +#endif +#endif #include <fsl_wdog.h>
#ifdef CONFIG_IMX_WATCHDOG @@ -33,8 +40,12 @@ void hw_watchdog_init(void) #define CONFIG_WATCHDOG_TIMEOUT_MSECS 128000 #endif timeout = (CONFIG_WATCHDOG_TIMEOUT_MSECS / 500) - 1; +#ifdef CONFIG_FSL_LAYERSCAPE + writew((WCR_WDA | WCR_SRS | WCR_WDE) << 8 | timeout, &wdog->wcr); +#else writew(WCR_WDZST | WCR_WDBG | WCR_WDE | WCR_WDT | WCR_SRS | WCR_WDA | SET_WCR_WT(timeout), &wdog->wcr); +#endif /* CONFIG_FSL_LAYERSCAPE*/ hw_watchdog_reset(); } #endif