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driver: rtc: stm23: fix build for STM32L1 Cat.1

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The Cat.1 STM32L1 MCUs do not provide the subsecond feature. This disable
subsecond related code for these MCUs.

Signed-off-by: Johan Lafon <johan.lafon@syslinbit.com>
This commit is contained in:
Johan Lafon 2023-09-18 15:34:11 +02:00 • committed by Fabio Baltieri
commit 469ba4e367
1 changed files with 19 additions and 2 deletions
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21
drivers/rtc/rtc_ll_stm32.c
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@ -29,6 +29,13 @@
LOG_MODULE_REGISTER(rtc_stm32, CONFIG_RTC_LOG_LEVEL);
#if defined(CONFIG_SOC_SERIES_STM32L1X) && !defined(RTC_SUBSECOND_SUPPORT)
/* subsecond counting is not supported by some STM32L1x MCUs */
#define HW_SUBSECOND_SUPPORT (0)
#else
#define HW_SUBSECOND_SUPPORT (1)
#endif
/* RTC start time: 1st, Jan, 2000 */
#define RTC_YEAR_REF 2000
/* struct tm start time: 1st, Jan, 1900 */
@ -237,10 +244,14 @@ static int rtc_stm32_set_time(const struct device *dev, const struct rtc_time *t
static int rtc_stm32_get_time(const struct device *dev, struct rtc_time *timeptr)
{
const struct rtc_stm32_config *cfg = dev->config;
struct rtc_stm32_data *data = dev->data;
uint32_t rtc_date, rtc_time, rtc_subsecond;
uint32_t rtc_date, rtc_time;
#if HW_SUBSECOND_SUPPORT
const struct rtc_stm32_config *cfg = dev->config;
uint32_t rtc_subsecond;
#endif
int err = k_mutex_lock(&data->lock, K_NO_WAIT);
@ -258,7 +269,9 @@ static int rtc_stm32_get_time(const struct device *dev, struct rtc_time *timeptr
* while doing so as it will result in an erroneous result otherwise
*/
rtc_time = LL_RTC_TIME_Get(RTC);
#if HW_SUBSECOND_SUPPORT
rtc_subsecond = LL_RTC_TIME_GetSubSecond(RTC);
#endif
} while (rtc_time != LL_RTC_TIME_Get(RTC));
} while (rtc_date != LL_RTC_DATE_Get(RTC));
@ -283,9 +296,13 @@ static int rtc_stm32_get_time(const struct device *dev, struct rtc_time *timeptr
timeptr->tm_min = bcd2bin(__LL_RTC_GET_MINUTE(rtc_time));
timeptr->tm_sec = bcd2bin(__LL_RTC_GET_SECOND(rtc_time));
#if HW_SUBSECOND_SUPPORT
uint64_t temp = ((uint64_t)(cfg->sync_prescaler - rtc_subsecond)) * 1000000000L;
timeptr->tm_nsec = DIV_ROUND_CLOSEST(temp, cfg->sync_prescaler + 1);
#else
timeptr->tm_nsec = 0;
#endif
/* unknown values */
timeptr->tm_yday = -1;