drivers/serial/serial_owl.c

1 // SPDX-License-Identifier: GPL-2.0+
3  * Actions Semi OWL SoCs UART driver
5  * Copyright (C) 2015 Actions Semi Co., Ltd.
45 static int owl_serial_getc(struct udevice *dev)  in owl_serial_getc()
49 	if (readl(priv->base + OWL_UART_STAT) & OWL_UART_STAT_RFEM)  in owl_serial_getc()
50 		return -EAGAIN;  in owl_serial_getc()
52 	return (int)(readl(priv->base +	OWL_UART_RXDAT));  in owl_serial_getc()
55 static int owl_serial_putc(struct udevice *dev,	const char ch)  in owl_serial_putc()
59 	if (readl(priv->base + OWL_UART_STAT) & OWL_UART_STAT_TFFU)  in owl_serial_putc()
60 		return -EAGAIN;  in owl_serial_putc()
62 	writel(ch, priv->base +	OWL_UART_TXDAT);  in owl_serial_putc()
67 static int owl_serial_pending(struct udevice *dev, bool	input)  in owl_serial_pending()
70 	unsigned int stat = readl(priv->base + OWL_UART_STAT);  in owl_serial_pending()
78 static int owl_serial_probe(struct udevice *dev)  in owl_serial_probe()
86 	uart_ctl = readl(priv->base + OWL_UART_CTL);  in owl_serial_probe()
90 	writel(uart_ctl, priv->base + OWL_UART_CTL);  in owl_serial_probe()
104 static int owl_serial_ofdata_to_platdata(struct	udevice	*dev)  in owl_serial_ofdata_to_platdata()
108 	priv->base = dev_read_addr(dev);  in owl_serial_ofdata_to_platdata()
109 	if (priv->base == FDT_ADDR_T_NONE)  in owl_serial_ofdata_to_platdata()
110 		return -EINVAL;  in owl_serial_ofdata_to_platdata()
115 static const struct dm_serial_ops owl_serial_ops = {
122 static const struct udevice_id owl_serial_ids[] = {
123 	{ .compatible =	"actions,s900-serial" },