1 // SPDX-License-Identifier: GPL-2.0+
12 #include <dt-bindings/clock/microchip,clock.h>
64 	writel(div - 1, base + U_BRG);  in pic32_serial_init()
66 	/* enable the UART for TX and RX */  in pic32_serial_init()
74 /* Check whether any char pending in RX fifo */
77 	/* check if rx buffer overrun error has occurred */  in pic32_uart_pending_input()
86 	 * chars in rx-fifo. Only it can be known whether there is any.  in pic32_uart_pending_input()
91 static int pic32_uart_pending(struct udevice *dev, bool input)  in pic32_uart_pending()  argument
95 	if (input)  in pic32_uart_pending()
96 		return pic32_uart_pending_input(priv->base);  in pic32_uart_pending()
98 	return !(readl(priv->base + U_STA) & UART_TX_EMPTY);  in pic32_uart_pending()
105 	return pic32_serial_init(priv->base, priv->uartclk, baudrate);  in pic32_uart_setbrg()
113 	if (readl(priv->base + U_STA) & UART_TX_FULL)  in pic32_uart_putc()
114 		return -EAGAIN;  in pic32_uart_putc()
117 	writel(ch, priv->base + U_TXR);  in pic32_uart_putc()
126 	/* return error if RX fifo is empty */  in pic32_uart_getc()
127 	if (!pic32_uart_pending_input(priv->base))  in pic32_uart_getc()
128 		return -EAGAIN;  in pic32_uart_getc()
130 	/* read the character from rx buffer */  in pic32_uart_getc()
131 	return readl(priv->base + U_RXR) & 0xff;  in pic32_uart_getc()
143 	addr = fdtdec_get_addr_size(gd->fdt_blob, dev_of_offset(dev), "reg",  in pic32_uart_probe()
146 		return -EINVAL;  in pic32_uart_probe()
148 	priv->base = ioremap(addr, size);  in pic32_uart_probe()
154 	priv->uartclk = clk_get_rate(&clk);  in pic32_uart_probe()
158 	return pic32_serial_init(priv->base, priv->uartclk, CONFIG_BAUDRATE);  in pic32_uart_probe()
169 	{ .compatible = "microchip,pic32mzda-uart" },
174 	.name		= "pic32-uart",