1 // SPDX-License-Identifier: GPL-2.0+
3  *  drivers/tty/serial/8250/8250_pxa.c -- driver for PXA on-board UARTS
37 	serial8250_suspend_port(data->line);  in serial_pxa_suspend()
46 	serial8250_resume_port(data->line);  in serial_pxa_resume()
56 	{ .compatible = "mrvl,pxa-uart", },
57 	{ .compatible = "mrvl,mmp-uart", },
62 /* Uart divisor latch write */
82 	struct pxa8250_data *data = port->private_data;  in serial_pxa_pm()
85 		clk_prepare_enable(data->clk);  in serial_pxa_pm()
87 		clk_disable_unprepare(data->clk);  in serial_pxa_pm()
92 	struct uart_8250_port uart = {};  in serial_pxa_probe()  local
103 		return -ENODEV;  in serial_pxa_probe()
105 	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);  in serial_pxa_probe()
107 		return -ENOMEM;  in serial_pxa_probe()
109 	data->clk = devm_clk_get(&pdev->dev, NULL);  in serial_pxa_probe()
110 	if (IS_ERR(data->clk))  in serial_pxa_probe()
111 		return PTR_ERR(data->clk);  in serial_pxa_probe()
113 	ret = clk_prepare(data->clk);  in serial_pxa_probe()
117 	ret = of_alias_get_id(pdev->dev.of_node, "serial");  in serial_pxa_probe()
119 		uart.port.line = ret;  in serial_pxa_probe()
121 	uart.port.type = PORT_XSCALE;  in serial_pxa_probe()
122 	uart.port.iotype = UPIO_MEM32;  in serial_pxa_probe()
123 	uart.port.mapbase = mmres->start;  in serial_pxa_probe()
124 	uart.port.regshift = 2;  in serial_pxa_probe()
125 	uart.port.irq = irq;  in serial_pxa_probe()
126 	uart.port.fifosize = 64;  in serial_pxa_probe()
127 	uart.port.flags = UPF_IOREMAP | UPF_SKIP_TEST | UPF_FIXED_TYPE;  in serial_pxa_probe()
128 	uart.port.dev = &pdev->dev;  in serial_pxa_probe()
129 	uart.port.uartclk = clk_get_rate(data->clk);  in serial_pxa_probe()
130 	uart.port.pm = serial_pxa_pm;  in serial_pxa_probe()
131 	uart.port.private_data = data;  in serial_pxa_probe()
132 	uart.dl_write = serial_pxa_dl_write;  in serial_pxa_probe()
134 	ret = serial8250_register_8250_port(&uart);  in serial_pxa_probe()
138 	data->line = ret;  in serial_pxa_probe()
145 	clk_unprepare(data->clk);  in serial_pxa_probe()
153 	serial8250_unregister_port(data->line);  in serial_pxa_remove()
155 	clk_unprepare(data->clk);  in serial_pxa_remove()
163 		.name	= "pxa2xx-uart",
175 	struct uart_port *port = &device->port;  in early_serial_pxa_setup()
177 	if (!(device->port.membase || device->port.iobase))  in early_serial_pxa_setup()
178 		return -ENODEV;  in early_serial_pxa_setup()
180 	port->regshift = 2;  in early_serial_pxa_setup()
183 OF_EARLYCON_DECLARE(early_pxa, "mrvl,pxa-uart", early_serial_pxa_setup);
184 OF_EARLYCON_DECLARE(mmp, "mrvl,mmp-uart", early_serial_pxa_setup);
189 MODULE_ALIAS("platform:pxa2xx-uart");