drivers/serial/serial_uniphier.c

2  * Copyright (C) 2012-2015 Panasonic Corporation
3  * Copyright (C) 2015-2016 Socionext Inc.
6  * SPDX-License-Identifier:	GPL-2.0+
19  * Note: Register map is slightly different from that of 16550.
43 	((struct uniphier_serial_private_data *)dev_get_priv(dev))->membase
52 	divisor = DIV_ROUND_CLOSEST(priv->uartclk, mode_x_div * baudrate);  in uniphier_serial_setbrg()
54 	writel(divisor, &port->dlr);  in uniphier_serial_setbrg()
63 	if (!(readl(&port->lsr) & UART_LSR_DR))  in uniphier_serial_getc()
64 		return -EAGAIN;  in uniphier_serial_getc()
66 	return readl(&port->rx);  in uniphier_serial_getc()
73 	if (!(readl(&port->lsr) & UART_LSR_THRE))  in uniphier_serial_putc()
74 		return -EAGAIN;  in uniphier_serial_putc()
76 	writel(c, &port->tx);  in uniphier_serial_putc()
86 		return readl(&port->lsr) & UART_LSR_DR;  in uniphier_serial_pending()
88 		return !(readl(&port->lsr) & UART_LSR_THRE);  in uniphier_serial_pending()
101 		return -EINVAL;  in uniphier_serial_probe()
105 		return -ENOMEM;  in uniphier_serial_probe()
107 	priv->membase = port;  in uniphier_serial_probe()
109 	priv->uartclk = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),  in uniphier_serial_probe()
110 				       "clock-frequency", 0);  in uniphier_serial_probe()
112 	tmp = readl(&port->lcr_mcr);  in uniphier_serial_probe()
115 	writel(tmp, &port->lcr_mcr);  in uniphier_serial_probe()
121 	{ .compatible = "socionext,uniphier-uart" },
133 	.name = "uniphier-uart",