IMX21_UTS
.uts_reg = IMX21_UTS,
imx_uart_writel(sport, sport->saved_reg[9], IMX21_UTS);
sport->saved_reg[9] = imx_uart_readl(sport, IMX21_UTS);
uts = imx_uart_readl(sport, IMX21_UTS);
imx_uart_writel(sport, uts, IMX21_UTS);
while (readl_relaxed(port->membase + IMX21_UTS) & UTS_TXFULL)