drivers/serial/serial_owl.c

1 // SPDX-License-Identifier: GPL-2.0+
31 #define	OWL_UART_STAT_RFFS		BIT(9)	/* RX FIFO full	Status */
33 #define	OWL_UART_STAT_RFEM		BIT(5)	/* RX FIFO Empty Status	*/
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()
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()  argument
70 	unsigned int stat = readl(priv->base + OWL_UART_STAT);  in owl_serial_pending()
72 	if (input)  in owl_serial_pending()
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()
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()
123 	{ .compatible =	"actions,s900-serial" },