UART_MCR_AFE
info->MCR &= ~UART_MCR_AFE;
info->MCR |= UART_MCR_AFE;
if (p8250->mcr & UART_MCR_AFE)
if ((ier & UART_IER_RDI) && (up->mcr & UART_MCR_AFE)) {
up->mcr &= ~UART_MCR_AFE;
up->mcr |= UART_MCR_AFE;
if (up->mcr & UART_MCR_AFE) {
up->mcr |= UART_MCR_AFE;
up->mcr &= ~UART_MCR_AFE;
if (priv->mcr & UART_MCR_AFE)
mcr |= UART_MCR_AFE;
priv->mcr |= UART_MCR_AFE;
priv->mcr &= ~UART_MCR_AFE;
up->mcr |= UART_MCR_AFE;
up->mcr |= UART_MCR_AFE;
up->mcr &= ~UART_MCR_AFE;
UART_MCR_AFE) {