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
99 		return -ENODEV;  in serial_pxa_probe()
101 	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);  in serial_pxa_probe()
103 		return -ENOMEM;  in serial_pxa_probe()
105 	data->clk = devm_clk_get(&pdev->dev, NULL);  in serial_pxa_probe()
106 	if (IS_ERR(data->clk))  in serial_pxa_probe()
107 		return PTR_ERR(data->clk);  in serial_pxa_probe()
109 	ret = clk_prepare(data->clk);  in serial_pxa_probe()
113 	uart.port.type = PORT_XSCALE;  in serial_pxa_probe()
114 	uart.port.mapbase = mmres->start;  in serial_pxa_probe()
115 	uart.port.flags = UPF_IOREMAP | UPF_SKIP_TEST | UPF_FIXED_TYPE;  in serial_pxa_probe()
116 	uart.port.dev = &pdev->dev;  in serial_pxa_probe()
117 	uart.port.uartclk = clk_get_rate(data->clk);  in serial_pxa_probe()
118 	uart.port.pm = serial_pxa_pm;  in serial_pxa_probe()
119 	uart.port.private_data = data;  in serial_pxa_probe()
121 	ret = uart_read_port_properties(&uart.port);  in serial_pxa_probe()
125 	uart.port.iotype = UPIO_MEM32;  in serial_pxa_probe()
126 	uart.port.regshift = 2;  in serial_pxa_probe()
127 	uart.port.fifosize = 64;  in serial_pxa_probe()
128 	uart.tx_loadsz = 32;  in serial_pxa_probe()
129 	uart.dl_write = serial_pxa_dl_write;  in serial_pxa_probe()
131 	ret = serial8250_register_8250_port(&uart);  in serial_pxa_probe()
135 	data->line = ret;  in serial_pxa_probe()
142 	clk_unprepare(data->clk);  in serial_pxa_probe()
150 	serial8250_unregister_port(data->line);  in serial_pxa_remove()
152 	clk_unprepare(data->clk);  in serial_pxa_remove()
160 		.name	= "pxa2xx-uart",
169 MODULE_DESCRIPTION("driver for PXA on-board UARTS");
171 MODULE_ALIAS("platform:pxa2xx-uart");