struct imx_port *sport = (struct imx_port *)port;  if (mctrl & TIOCM_RTS) UCR2((u32)sport->port.membase) |= UCR2_CTS; else UCR2((u32)sport->port.membase) &= ~UCR2_CTS;
static void imx_set_mctrl(struct uart_port *port, unsigned int mctrl){}