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drivers: watchdog: stm32 iwdg starts with timeout install

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It Follows the sequence to configure and launch the IWDG watchdog
for the stm32 mcus

Signed-off-by: Francois Ramu <francois.ramu@st.com>
This commit is contained in:
Francois Ramu 2021-10-27 13:20:23 +02:00 • committed by Maureen Helm
commit c2db84ee8a
1 changed files with 3 additions and 4 deletions
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7
drivers/watchdog/wdt_iwdg_stm32.c
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@ -77,7 +77,7 @@ static void iwdg_stm32_convert_timeout(uint32_t timeout,
static int iwdg_stm32_setup(const struct device *dev, uint8_t options) static int iwdg_stm32_setup(const struct device *dev, uint8_t options)
{ {
IWDG_TypeDef *iwdg = IWDG_STM32_STRUCT(dev); ARG_UNUSED(dev);
/* Deactivate running when debugger is attached. */ /* Deactivate running when debugger is attached. */
if (options & WDT_OPT_PAUSE_HALTED_BY_DBG) { if (options & WDT_OPT_PAUSE_HALTED_BY_DBG) {
@ -99,7 +99,7 @@ static int iwdg_stm32_setup(const struct device *dev, uint8_t options)
return -ENOTSUP; return -ENOTSUP;
} }
LL_IWDG_Enable(iwdg); /* Enable the IWDG only when the timeout is installed */
return 0; return 0;
} }
@ -134,6 +134,7 @@ static int iwdg_stm32_install_timeout(const struct device *dev,
tickstart = k_uptime_get_32(); tickstart = k_uptime_get_32();
LL_IWDG_Enable(iwdg);
LL_IWDG_EnableWriteAccess(iwdg); LL_IWDG_EnableWriteAccess(iwdg);
LL_IWDG_SetPrescaler(iwdg, prescaler); LL_IWDG_SetPrescaler(iwdg, prescaler);
@ -172,12 +173,10 @@ static const struct wdt_driver_api iwdg_stm32_api = {
static int iwdg_stm32_init(const struct device *dev) static int iwdg_stm32_init(const struct device *dev)
{ {
#ifndef CONFIG_WDT_DISABLE_AT_BOOT #ifndef CONFIG_WDT_DISABLE_AT_BOOT
IWDG_TypeDef *iwdg = IWDG_STM32_STRUCT(dev);
struct wdt_timeout_cfg config = { struct wdt_timeout_cfg config = {
.window.max = CONFIG_IWDG_STM32_INITIAL_TIMEOUT .window.max = CONFIG_IWDG_STM32_INITIAL_TIMEOUT
}; };
LL_IWDG_Enable(iwdg);
iwdg_stm32_install_timeout(dev, &config); iwdg_stm32_install_timeout(dev, &config);
#endif #endif