ATMEL_US_MR
mode = old_mode = atmel_uart_readl(port, ATMEL_US_MR);
atmel_uart_writel(port, ATMEL_US_MR, mode);
mr = atmel_uart_readl(port, ATMEL_US_MR) & ATMEL_US_CHRL;
mr = atmel_uart_readl(port, ATMEL_US_MR) & ATMEL_US_PAR;
atmel_port->cache.mr = atmel_uart_readl(port, ATMEL_US_MR);
atmel_uart_writel(port, ATMEL_US_MR, atmel_port->cache.mr);
atmel_uart_writel(&atmel_port->uart, ATMEL_US_MR,
mode = atmel_uart_readl(port, ATMEL_US_MR);
atmel_uart_writel(port, ATMEL_US_MR, mode);
mode = atmel_uart_readl(port, ATMEL_US_MR);
atmel_port->backup_mode = atmel_uart_readl(port, ATMEL_US_MR);
atmel_uart_writel(port, ATMEL_US_MR, mode);
unsigned int mode = atmel_uart_readl(port, ATMEL_US_MR);
atmel_uart_writel(port, ATMEL_US_MR, mode);