tests/drivers/watchdog: Review yaml file for stm32 window watchdog

Review tests applicability so that it only relies on watchdog
compatible availability. Additionally, tweak APB prescaler
in case of window watchdog test, so that timeout value can be
achieved.

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>

tests/drivers/watchdog/wdt_basic_api/boards/disco_l475_iot1.overlay

@@ -0,0 +1,7 @@
+&wwdg {
+	status = "okay";
+};
+
+&iwdg {
+	status = "disabled";
+};

tests/drivers/watchdog/wdt_basic_api/nucleo_l496zg.conf

@@ -1,11 +0,0 @@
-# 2MHz system clock
-CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=2000000
-
-# SYSCLK selection
-CONFIG_CLOCK_STM32_SYSCLK_SRC_MSI=y
-# produce 2MHz clock at MSI RC output
-CONFIG_CLOCK_STM32_MSI_RANGE=5
-# select buses prescalers
-CONFIG_CLOCK_STM32_AHB_PRESCALER=1
-CONFIG_CLOCK_STM32_APB1_PRESCALER=1
-CONFIG_CLOCK_STM32_APB2_PRESCALER=1

tests/drivers/watchdog/wdt_basic_api/testcase.yaml

@@ -2,13 +2,14 @@ tests:
   drivers.watchdog:
     depends_on: watchdog
     tags: drivers watchdog
-    filter: not CONFIG_WDT_SAM
-    platform_exclude: nucleo_l496zg nucleo_f401re mec15xxevb_assy6853
-  drivers.watchdog.nucleo_l496zg:
+    filter: not (CONFIG_WDT_SAM or dt_compat_enabled("st,stm32-window-watchdog"))
+    platform_exclude: mec15xxevb_assy6853
+  drivers.watchdog.stm32wwdg:
     depends_on: watchdog
     tags: drivers watchdog
-    extra_args: CONF_FILE="prj.conf;nucleo_l496zg.conf"
-    platform_allow: nucleo_l496zg
+    filter: dt_compat_enabled("st,stm32-window-watchdog")
+    extra_configs:
+      - CONFIG_CLOCK_STM32_APB1_PRESCALER=16
   drivers.watchdog.mec15xxevb_assy6853:
     depends_on: watchdog
     tags: drivers watchdog