1 // SPDX-License-Identifier: GPL-2.0+
36 	struct device_node *np = ofdev->dev.of_node;  in of_platform_serial_setup()
37 	struct uart_port *port = &up->port;  in of_platform_serial_setup()
43 	pm_runtime_enable(&ofdev->dev);  in of_platform_serial_setup()
44 	pm_runtime_get_sync(&ofdev->dev);  in of_platform_serial_setup()
46 	if (of_property_read_u32(np, "clock-frequency", &clk)) {  in of_platform_serial_setup()
49 		info->clk = devm_clk_get(&ofdev->dev, NULL);  in of_platform_serial_setup()
50 		if (IS_ERR(info->clk)) {  in of_platform_serial_setup()
51 			ret = PTR_ERR(info->clk);  in of_platform_serial_setup()
52 			if (ret != -EPROBE_DEFER)  in of_platform_serial_setup()
53 				dev_warn(&ofdev->dev,  in of_platform_serial_setup()
58 		ret = clk_prepare_enable(info->clk);  in of_platform_serial_setup()
62 		clk = clk_get_rate(info->clk);  in of_platform_serial_setup()
64 	/* If current-speed was set, then try not to change it. */  in of_platform_serial_setup()
65 	if (of_property_read_u32(np, "current-speed", &spd) == 0)  in of_platform_serial_setup()
66 		port->custom_divisor = clk / (16 * spd);  in of_platform_serial_setup()
70 		dev_warn(&ofdev->dev, "invalid address\n");  in of_platform_serial_setup()
74 	port->flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT |  in of_platform_serial_setup()
76 	spin_lock_init(&port->lock);  in of_platform_serial_setup()
79 		port->iotype = UPIO_PORT;  in of_platform_serial_setup()
80 		port->iobase = resource.start;  in of_platform_serial_setup()
82 		port->mapbase = resource.start;  in of_platform_serial_setup()
83 		port->mapsize = resource_size(&resource);  in of_platform_serial_setup()
86 		if (of_property_read_u32(np, "reg-offset", &prop) == 0)  in of_platform_serial_setup()
87 			port->mapbase += prop;  in of_platform_serial_setup()
89 		port->iotype = UPIO_MEM;  in of_platform_serial_setup()
90 		if (of_property_read_u32(np, "reg-io-width", &prop) == 0) {  in of_platform_serial_setup()
93 				port->iotype = UPIO_MEM;  in of_platform_serial_setup()
96 				port->iotype = UPIO_MEM16;  in of_platform_serial_setup()
99 				port->iotype = of_device_is_big_endian(np) ?  in of_platform_serial_setup()
103 				dev_warn(&ofdev->dev, "unsupported reg-io-width (%d)\n",  in of_platform_serial_setup()
105 				ret = -EINVAL;  in of_platform_serial_setup()
109 		port->flags |= UPF_IOREMAP;  in of_platform_serial_setup()
113 	if (of_device_is_compatible(np, "mrvl,mmp-uart"))  in of_platform_serial_setup()
114 		port->regshift = 2;  in of_platform_serial_setup()
117 	if (of_property_read_u32(np, "reg-shift", &prop) == 0)  in of_platform_serial_setup()
118 		port->regshift = prop;  in of_platform_serial_setup()
121 	if (of_property_read_u32(np, "fifo-size", &prop) == 0)  in of_platform_serial_setup()
122 		port->fifosize = prop;  in of_platform_serial_setup()
127 		port->line = ret;  in of_platform_serial_setup()
131 		if (irq == -EPROBE_DEFER) {  in of_platform_serial_setup()
132 			ret = -EPROBE_DEFER;  in of_platform_serial_setup()
139 	port->irq = irq;  in of_platform_serial_setup()
141 	info->rst = devm_reset_control_get_optional_shared(&ofdev->dev, NULL);  in of_platform_serial_setup()
142 	if (IS_ERR(info->rst)) {  in of_platform_serial_setup()
143 		ret = PTR_ERR(info->rst);  in of_platform_serial_setup()
147 	ret = reset_control_deassert(info->rst);  in of_platform_serial_setup()
151 	port->type = type;  in of_platform_serial_setup()
152 	port->uartclk = clk;  in of_platform_serial_setup()
154 	if (of_property_read_bool(np, "no-loopback-test"))  in of_platform_serial_setup()
155 		port->flags |= UPF_SKIP_TEST;  in of_platform_serial_setup()
157 	port->dev = &ofdev->dev;  in of_platform_serial_setup()
158 	port->rs485_config = serial8250_em485_config;  in of_platform_serial_setup()
159 	up->rs485_start_tx = serial8250_em485_start_tx;  in of_platform_serial_setup()
160 	up->rs485_stop_tx = serial8250_em485_stop_tx;  in of_platform_serial_setup()
164 		port->iotype = UPIO_AU;  in of_platform_serial_setup()
170 	     of_device_is_compatible(np, "fsl,16550-FIFO64"))) {  in of_platform_serial_setup()
171 		port->handle_irq = fsl8250_handle_irq;  in of_platform_serial_setup()
172 		port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE);  in of_platform_serial_setup()
177 	clk_disable_unprepare(info->clk);  in of_platform_serial_setup()
179 	pm_runtime_put_sync(&ofdev->dev);  in of_platform_serial_setup()
180 	pm_runtime_disable(&ofdev->dev);  in of_platform_serial_setup()
195 	port_type = (unsigned long)of_device_get_match_data(&ofdev->dev);  in of_platform_serial_probe()
197 		return -EINVAL;  in of_platform_serial_probe()
199 	if (of_property_read_bool(ofdev->dev.of_node, "used-by-rtas"))  in of_platform_serial_probe()
200 		return -EBUSY;  in of_platform_serial_probe()
204 		return -ENOMEM;  in of_platform_serial_probe()
215 	if ((of_property_read_u32(ofdev->dev.of_node, "tx-threshold",  in of_platform_serial_probe()
218 		port8250.tx_loadsz = port8250.port.fifosize - tx_threshold;  in of_platform_serial_probe()
220 	if (of_property_read_bool(ofdev->dev.of_node, "auto-flow-control"))  in of_platform_serial_probe()
223 	if (of_property_read_u32(ofdev->dev.of_node,  in of_platform_serial_probe()
224 			"overrun-throttle-ms",  in of_platform_serial_probe()
232 	info->type = port_type;  in of_platform_serial_probe()
233 	info->line = ret;  in of_platform_serial_probe()
238 	pm_runtime_put_sync(&ofdev->dev);  in of_platform_serial_probe()
239 	pm_runtime_disable(&ofdev->dev);  in of_platform_serial_probe()
240 	clk_disable_unprepare(info->clk);  in of_platform_serial_probe()
253 	serial8250_unregister_port(info->line);  in of_platform_serial_remove()
255 	reset_control_assert(info->rst);  in of_platform_serial_remove()
256 	pm_runtime_put_sync(&ofdev->dev);  in of_platform_serial_remove()
257 	pm_runtime_disable(&ofdev->dev);  in of_platform_serial_remove()
258 	clk_disable_unprepare(info->clk);  in of_platform_serial_remove()
267 	struct uart_8250_port *port8250 = serial8250_get_port(info->line);  in of_serial_suspend()
268 	struct uart_port *port = &port8250->port;  in of_serial_suspend()
270 	serial8250_suspend_port(info->line);  in of_serial_suspend()
274 		clk_disable_unprepare(info->clk);  in of_serial_suspend()
282 	struct uart_8250_port *port8250 = serial8250_get_port(info->line);  in of_serial_resume()
283 	struct uart_port *port = &port8250->port;  in of_serial_resume()
287 		clk_prepare_enable(info->clk);  in of_serial_resume()
290 	serial8250_resume_port(info->line);  in of_serial_resume()
307 	{ .compatible = "nxp,lpc3220-uart", .data = (void *)PORT_LPC3220, },
308 	{ .compatible = "ralink,rt2880-uart", .data = (void *)PORT_RT2880, },
309 	{ .compatible = "intel,xscale-uart", .data = (void *)PORT_XSCALE, },
310 	{ .compatible = "altr,16550-FIFO32",
312 	{ .compatible = "altr,16550-FIFO64",
314 	{ .compatible = "altr,16550-FIFO128",
316 	{ .compatible = "mediatek,mtk-btif",
318 	{ .compatible = "mrvl,mmp-uart",
320 	{ .compatible = "ti,da830-uart", .data = (void *)PORT_DA830, },
321 	{ .compatible = "nuvoton,npcm750-uart", .data = (void *)PORT_NPCM, },