ATMEL_US_TTGR
atmel_uart_writel(port, ATMEL_US_TTGR,
atmel_uart_writel(port, ATMEL_US_TTGR, port->iso7816.tg);
atmel_port->cache.ttgr = atmel_uart_readl(port, ATMEL_US_TTGR);
atmel_uart_writel(port, ATMEL_US_TTGR, atmel_port->cache.ttgr);
atmel_uart_writel(port, ATMEL_US_TTGR,
atmel_uart_writel(port, ATMEL_US_TTGR, iso7816conf->tg);
atmel_uart_writel(port, ATMEL_US_TTGR, 0);
atmel_uart_writel(port, ATMEL_US_TTGR,