1 // SPDX-License-Identifier: GPL-2.0
36 				struct serial_rs485 *rs485)  in lpc18xx_rs485_config()  argument
43 	if (rs485->flags & SER_RS485_ENABLED) {  in lpc18xx_rs485_config()
47 		if (rs485->flags & SER_RS485_RTS_ON_SEND)  in lpc18xx_rs485_config()
51 	if (rs485->delay_rts_after_send) {  in lpc18xx_rs485_config()
52 		baud_clk = port->uartclk / up->dl_read(up);  in lpc18xx_rs485_config()
53 		rs485_dly_reg = DIV_ROUND_UP(rs485->delay_rts_after_send  in lpc18xx_rs485_config()
59 		/* Calculate the resulting delay in ms */  in lpc18xx_rs485_config()
60 		rs485->delay_rts_after_send = (rs485_dly_reg * MSEC_PER_SEC)  in lpc18xx_rs485_config()
80 	offset = offset << p->regshift;  in lpc18xx_uart_serial_out()
81 	writel(value, p->membase + offset);  in lpc18xx_uart_serial_out()
87 	/* Delay RTS before send is not supported */
99 		dev_err(&pdev->dev, "memory resource not found");  in lpc18xx_serial_probe()
100 		return -EINVAL;  in lpc18xx_serial_probe()
105 	uart.port.membase = devm_ioremap(&pdev->dev, res->start,  in lpc18xx_serial_probe()
108 		return -ENOMEM;  in lpc18xx_serial_probe()
110 	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);  in lpc18xx_serial_probe()
112 		return -ENOMEM;  in lpc18xx_serial_probe()
114 	data->clk_uart = devm_clk_get(&pdev->dev, "uartclk");  in lpc18xx_serial_probe()
115 	if (IS_ERR(data->clk_uart)) {  in lpc18xx_serial_probe()
116 		dev_err(&pdev->dev, "uart clock not found\n");  in lpc18xx_serial_probe()
117 		return PTR_ERR(data->clk_uart);  in lpc18xx_serial_probe()
120 	data->clk_reg = devm_clk_get(&pdev->dev, "reg");  in lpc18xx_serial_probe()
121 	if (IS_ERR(data->clk_reg)) {  in lpc18xx_serial_probe()
122 		dev_err(&pdev->dev, "reg clock not found\n");  in lpc18xx_serial_probe()
123 		return PTR_ERR(data->clk_reg);  in lpc18xx_serial_probe()
126 	ret = clk_prepare_enable(data->clk_reg);  in lpc18xx_serial_probe()
128 		dev_err(&pdev->dev, "unable to enable reg clock\n");  in lpc18xx_serial_probe()
132 	ret = clk_prepare_enable(data->clk_uart);  in lpc18xx_serial_probe()
134 		dev_err(&pdev->dev, "unable to enable uart clock\n");  in lpc18xx_serial_probe()
138 	data->dma.rx_param = data;  in lpc18xx_serial_probe()
139 	data->dma.tx_param = data;  in lpc18xx_serial_probe()
142 	uart.port.dev = &pdev->dev;  in lpc18xx_serial_probe()
143 	uart.port.mapbase = res->start;  in lpc18xx_serial_probe()
146 	uart.port.uartclk = clk_get_rate(data->clk_uart);  in lpc18xx_serial_probe()
159 	uart.dma = &data->dma;  in lpc18xx_serial_probe()
160 	uart.dma->rxconf.src_maxburst = 1;  in lpc18xx_serial_probe()
161 	uart.dma->txconf.dst_maxburst = 1;  in lpc18xx_serial_probe()
165 		dev_err(&pdev->dev, "unable to register 8250 port\n");  in lpc18xx_serial_probe()
169 	data->line = ret;  in lpc18xx_serial_probe()
175 	clk_disable_unprepare(data->clk_uart);  in lpc18xx_serial_probe()
177 	clk_disable_unprepare(data->clk_reg);  in lpc18xx_serial_probe()
185 	serial8250_unregister_port(data->line);  in lpc18xx_serial_remove()
186 	clk_disable_unprepare(data->clk_uart);  in lpc18xx_serial_remove()
187 	clk_disable_unprepare(data->clk_reg);  in lpc18xx_serial_remove()
191 	{ .compatible = "nxp,lpc1850-uart" },
200 		.name = "lpc18xx-uart",