3  * NI 16550 UART Driver
5  * The National Instruments (NI) 16550 is a UART that is compatible with the
258 static u8 ni16550_read_fifo_size(struct uart_8250_port *uart, int reg)  in ni16550_read_fifo_size()  argument
260 	u8 value = serial_in(uart, reg);  in ni16550_read_fifo_size()
278 	struct uart_8250_port *uart __free(kfree) = NULL;  in ni16550_probe()
288 	uart = kzalloc(sizeof(*uart), GFP_KERNEL);  in ni16550_probe()
289 	if (!uart)  in ni16550_probe()
296 	spin_lock_init(&uart->port.lock);  in ni16550_probe()
298 	ret = ni16550_get_regs(pdev, &uart->port);  in ni16550_probe()
303 	serial8250_set_defaults(uart);  in ni16550_probe()
307 	uart->port.dev		= dev;  in ni16550_probe()
308 	uart->port.flags	= UPF_BOOT_AUTOCONF | UPF_FIXED_PORT | UPF_FIXED_TYPE;  in ni16550_probe()
309 	uart->port.startup	= ni16550_port_startup;  in ni16550_probe()
310 	uart->port.shutdown	= ni16550_port_shutdown;  in ni16550_probe()
315 	txfifosz = ni16550_read_fifo_size(uart, NI16550_TFS_OFFSET);  in ni16550_probe()
316 	rxfifosz = ni16550_read_fifo_size(uart, NI16550_RFS_OFFSET);  in ni16550_probe()
321 	uart->port.type		= PORT_16550A;  in ni16550_probe()
322 	uart->port.fifosize	= txfifosz;  in ni16550_probe()
323 	uart->tx_loadsz		= txfifosz;  in ni16550_probe()
324 	uart->fcr		= UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10;  in ni16550_probe()
325 	uart->capabilities	= UART_CAP_FIFO | UART_CAP_AFE | UART_CAP_EFR;  in ni16550_probe()
332 	uart->port.uartclk = info->uartclk;  in ni16550_probe()
334 	ret = uart_read_port_properties(&uart->port);  in ni16550_probe()
338 	if (!uart->port.uartclk) {  in ni16550_probe()
341 			uart->port.uartclk = clk_get_rate(data->clk);  in ni16550_probe()
344 	if (!uart->port.uartclk)  in ni16550_probe()
350 		uart->port.set_mctrl = ni16550_set_mctrl;  in ni16550_probe()
351 		ni16550_config_prescaler(uart, (u8)prescaler);  in ni16550_probe()
369 		rs232_property = is_pmr_rs232_mode(uart);  in ni16550_probe()
384 		ni16550_rs485_setup(&uart->port);  in ni16550_probe()
387 	ret = serial8250_register_8250_port(uart);  in ni16550_probe()
416 	/* Sets UART clock rate to 22.222 MHz with 1.125 prescale */
423 	/* Set UART clock rate to 29.629 MHz with 1.125 prescale */