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stm32h7: Always clear AHB1ENR at startup on stm32h7

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Entirely clear the AHB1ENR register.  There is no need to modify
AHB1LPENR.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2025-04-22 02:48:15 -04:00
parent da8e0a6e50
commit 5d1f773ffb
1 changed files with 1 additions and 5 deletions
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6
src/stm32/stm32h7.c
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@ -86,11 +86,6 @@ DECL_CONSTANT_STR("RESERVE_PINS_crystal", "PH0,PH1");
static void
clock_setup(void)
{
#if !CONFIG_MACH_STM32H723
// Ensure USB OTG ULPI is not enabled
CLEAR_BIT(RCC->AHB1ENR, RCC_AHB1ENR_USB2OTGHSULPIEN);
CLEAR_BIT(RCC->AHB1LPENR, RCC_AHB1LPENR_USB2OTGHSULPILPEN);
#endif
// Set this despite correct defaults.
// "The software has to program the supply configuration in PWR control
// register 3" (pg. 259)
@ -239,6 +234,7 @@ armcm_main(void)
RCC->APB2ENR = 0x00000000;
RCC->APB3ENR = 0x00000000;
RCC->APB4ENR = 0x00000000;
RCC->AHB1ENR = 0x00000000;
SCB->VTOR = (uint32_t)VectorTable;