stm32_usart_clr_bits
stm32_usart_clr_bits(port, ofs->cr1, stm32_port->cr1_irq);
stm32_usart_clr_bits(port, ofs->cr3, stm32_port->cr3_irq);
stm32_usart_clr_bits(port, ofs->cr1, stm32_port->cr1_irq);
stm32_usart_clr_bits(port, ofs->cr3, stm32_port->cr3_irq);
stm32_usart_clr_bits(port, ofs->rqr, USART_RQR_SBKRQ);
stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAT);
stm32_usart_clr_bits(port, ofs->cr1, val);
stm32_usart_clr_bits(port, ofs->cr1, USART_CR1_OVER8);
stm32_usart_clr_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
stm32_usart_clr_bits(port, ofs->cr1, USART_CR1_PEIE);
stm32_usart_clr_bits(port, ofs->cr1, USART_CR1_UESM);
stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_WUFIE);
stm32_usart_clr_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
stm32_usart_clr_bits(port, ofs->cr3,
stm32_usart_clr_bits(port, ofs->cr1,
stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAR);
stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_TXFTIE);
stm32_usart_clr_bits(port, ofs->cr1, USART_CR1_TXEIE);
stm32_usart_clr_bits(port, ofs->cr1, USART_CR1_TCIE);
stm32_usart_clr_bits(port, ofs->isr, USART_SR_TC);
stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_WUFIE);
stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_RTSE);