UCR3
ucr3 = imx_uart_readl(sport, UCR3);
ucr3 = imx_uart_readl(sport, UCR3) & ~UCR3_DSR;
imx_uart_writel(sport, ucr3, UCR3);
ucr3 = imx_uart_readl(sport, UCR3) & ~UCR3_INVT;
imx_uart_writel(sport, ucr3, UCR3);
UCR3);
imx_uart_writel(sport, ucr3, UCR3);
imx_uart_writel(sport, sport->saved_reg[2], UCR3);
sport->saved_reg[2] = imx_uart_readl(sport, UCR3);
ucr3 = imx_uart_readl(sport, UCR3);
imx_uart_writel(sport, ucr3, UCR3);
ucr->ucr3 = imx_uart_readl(sport, UCR3);
imx_uart_writel(sport, ucr->ucr3, UCR3);