diff --git a/arch/arm/src/stm32/stm32_otghsdev.c b/arch/arm/src/stm32/stm32_otghsdev.c index beb6431a48..c7e7fdadc4 100644 --- a/arch/arm/src/stm32/stm32_otghsdev.c +++ b/arch/arm/src/stm32/stm32_otghsdev.c @@ -5132,6 +5132,14 @@ static void stm32_hwinitialize(FAR struct stm32_usbdev_s *priv) stm32_putreg(OTGHS_GAHBCFG_TXFELVL, STM32_OTGHS_GAHBCFG); + /* Set the PHYSEL bit in the GUSBCFG register to select the OTG HS serial + * transceiver: "This bit is always 1 with write-only access" + */ + + regval = stm32_getreg(STM32_OTGHS_GUSBCFG); + regval |= OTGHS_GUSBCFG_PHYSEL; + stm32_putreg(regval, STM32_OTGHS_GUSBCFG); + /* Common USB OTG core initialization */ /* Reset after a PHY select and set Host mode. First, wait for AHB master * IDLE state.