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drivers: usb: udc: stm32: fix FS mode on OTG_FS for STM32F4 series #97789

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drivers: usb: udc: stm32: fix FS mode on OTG_FS for STM32F4 series #97789

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7 changes: 7 additions & 0 deletions drivers/usb/udc/udc_stm32.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1282,6 +1282,13 @@ static int priv_clock_enable(void)
#else /* CONFIG_SOC_SERIES_STM32F2X || CONFIG_SOC_SERIES_STM32F4X */
if (UDC_STM32_NODE_PHY_ITFACE(DT_DRV_INST(0)) == PCD_PHY_ULPI) {
LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_OTGHSULPI);
} else if (UDC_STM32_NODE_SPEED(DT_DRV_INST(0)) == PCD_SPEED_HIGH_IN_FULL) {
/*
* Some parts of the STM32F4 series require the OTGHSULPILPEN to be
* cleared if the OTG_HS is used in FS mode. Disable it on all parts
* since it has no nefarious effect if performed when not required.
*/
LL_AHB1_GRP1_DisableClockLowPower(LL_AHB1_GRP1_PERIPH_OTGHSULPI);
}
#endif /* CONFIG_SOC_SERIES_* */
#elif defined(CONFIG_SOC_SERIES_STM32H7X) && DT_HAS_COMPAT_STATUS_OKAY(st_stm32_otgfs)
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