1 // SPDX-License-Identifier: GPL-2.0
41 		writeb(value, p->membase);  in serial8250_em_serial_out_helper()
46 		writel(value, p->membase + ((offset + 1) << 2));  in serial8250_em_serial_out_helper()
49 		writel(value, p->membase + (UART_FCR_EM_HW << 2));  in serial8250_em_serial_out_helper()
52 		value &= 0x0f; /* only 4 valid bits - not Xscale */  in serial8250_em_serial_out_helper()
57 		writel(value, p->membase + (offset << 2));  in serial8250_em_serial_out_helper()
66 		return readb(p->membase);  in serial8250_em_serial_in()
72 		return readl(p->membase + ((offset + 1) << 2));  in serial8250_em_serial_in()
74 		return readl(p->membase + (UART_FCR_EM_HW << 2));  in serial8250_em_serial_in()
80 		return readl(p->membase + (offset << 2));  in serial8250_em_serial_in()
142 static u32 serial8250_em_serial_dl_read(struct uart_8250_port *up)  in serial8250_em_serial_dl_read()  argument
144 	return serial_in(up, UART_DLL_EM) | serial_in(up, UART_DLM_EM) << 8;  in serial8250_em_serial_dl_read()
147 static void serial8250_em_serial_dl_write(struct uart_8250_port *up, u32 value)  in serial8250_em_serial_dl_write()  argument
149 	serial_out(up, UART_DLL_EM, value & 0xff);  in serial8250_em_serial_dl_write()
150 	serial_out(up, UART_DLM_EM, value >> 8 & 0xff);  in serial8250_em_serial_dl_write()
156 	struct device *dev = &pdev->dev;  in serial8250_em_probe()
157 	struct uart_8250_port up;  in serial8250_em_probe()  local
168 		return dev_err_probe(dev, -EINVAL, "missing registers\n");  in serial8250_em_probe()
172 		return -ENOMEM;  in serial8250_em_probe()
178 	memset(&up, 0, sizeof(up));  in serial8250_em_probe()
179 	up.port.mapbase = regs->start;  in serial8250_em_probe()
180 	up.port.irq = irq;  in serial8250_em_probe()
181 	up.port.type = PORT_16750;  in serial8250_em_probe()
182 	up.port.flags = UPF_FIXED_PORT | UPF_IOREMAP | UPF_FIXED_TYPE;  in serial8250_em_probe()
183 	up.port.dev = dev;  in serial8250_em_probe()
184 	up.port.private_data = priv;  in serial8250_em_probe()
186 	up.port.uartclk = clk_get_rate(sclk);  in serial8250_em_probe()
188 	up.port.iotype = UPIO_MEM32;  in serial8250_em_probe()
189 	up.port.serial_in = serial8250_em_serial_in;  in serial8250_em_probe()
190 	up.port.serial_out = serial8250_em_serial_out;  in serial8250_em_probe()
191 	up.dl_read = serial8250_em_serial_dl_read;  in serial8250_em_probe()
192 	up.dl_write = serial8250_em_serial_dl_write;  in serial8250_em_probe()
194 	ret = serial8250_register_8250_port(&up);  in serial8250_em_probe()
198 	priv->line = ret;  in serial8250_em_probe()
207 	serial8250_unregister_port(priv->line);  in serial8250_em_remove()
211 	{ .compatible = "renesas,em-uart", },
218 		.name		= "serial8250-em",