stm32/rtc: Remove unused LSE detection code.
@@ -73,36 +73,6 @@ STATIC bool rtc_use_lse = false;
STATIC uint32_t rtc_startup_tick;
STATIC bool rtc_need_init_finalise = false;
-// check if LSE exists
-// not well tested, should probably be removed
-STATIC bool lse_magic(void) {
-#if 0
- uint32_t mode_in = GPIOC->MODER & 0x3fffffff;
- uint32_t mode_out = mode_in | 0x40000000;
- GPIOC->MODER = mode_out;
- GPIOC->OTYPER &= 0x7fff;
- GPIOC->BSRRH = 0x8000;
- GPIOC->OSPEEDR &= 0x3fffffff;
- GPIOC->PUPDR &= 0x3fffffff;
- int i = 0xff0;
- __IO int d = 0;
- uint32_t tc = 0;
- __IO uint32_t j;
- while (i) {
- GPIOC->MODER = mode_out;
- GPIOC->MODER = mode_in;
- for (j = 0; j < d; j++) ;
- i--;
- if ((GPIOC->IDR & 0x8000) == 0) {
- tc++;
- }
- }
- return (tc < 0xff0)?true:false;
-#else
- return false;
-#endif
-}
-
void rtc_init_start(bool force_init) {
RTCHandle.Instance = RTC;
@@ -152,13 +122,6 @@ void rtc_init_start(bool force_init) {
rtc_startup_tick = HAL_GetTick();
rtc_info = 0x3f000000 | (rtc_startup_tick & 0xffffff);
- if (rtc_use_lse) {
- if (lse_magic()) {
- // don't even try LSE
- rtc_use_lse = false;
- rtc_info &= ~0x01000000;
- }
- }
PYB_RTC_MspInit_Kick(&RTCHandle, rtc_use_lse, MICROPY_HW_RTC_USE_BYPASS);
}
