ATMEL_PDC_TXTEN
atmci_writel(host, ATMEL_PDC_PTCR, ATMEL_PDC_TXTEN);
atmel_uart_writel(port, ATMEL_PDC_PTCR, ATMEL_PDC_TXTEN);
pdc_tx = atmel_uart_readl(port, ATMEL_PDC_PTSR) & ATMEL_PDC_TXTEN;
atmel_uart_writel(port, ATMEL_PDC_PTCR, ATMEL_PDC_TXTEN);
& ATMEL_PDC_TXTEN))
atmel_uart_writel(port, ATMEL_PDC_PTCR, ATMEL_PDC_TXTEN);
ptcr = ATMEL_PDC_TXTEN;
.pdc_enable = ATMEL_PDC_TXTEN,