1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Registration of Cobalt UART platform device.
4 *
5 * Copyright (C) 2007 Yoichi Yuasa <yuasa@linux-mips.org>
6 */
7 #include <linux/errno.h>
8 #include <linux/init.h>
9 #include <linux/ioport.h>
10 #include <linux/platform_device.h>
11 #include <linux/serial_8250.h>
12
13 #include <cobalt.h>
14 #include <irq.h>
15
16 static struct resource cobalt_uart_resource[] __initdata = {
17 {
18 .start = 0x1c800000,
19 .end = 0x1c800007,
20 .flags = IORESOURCE_MEM,
21 },
22 {
23 .start = SERIAL_IRQ,
24 .end = SERIAL_IRQ,
25 .flags = IORESOURCE_IRQ,
26 },
27 };
28
29 static struct plat_serial8250_port cobalt_serial8250_port[] = {
30 {
31 .irq = SERIAL_IRQ,
32 .uartclk = 18432000,
33 .iotype = UPIO_MEM,
34 .flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
35 .mapbase = 0x1c800000,
36 },
37 {},
38 };
39
40 static __init int cobalt_uart_add(void)
41 {
42 struct platform_device *pdev;
43 int retval;
44
45 /*
46 * Cobalt Qube1 has no UART.
47 */
48 if (cobalt_board_id == COBALT_BRD_ID_QUBE1)
49 return 0;
50
51 pdev = platform_device_alloc("serial8250", -1);
52 if (!pdev)
53 return -ENOMEM;
54
55 pdev->id = PLAT8250_DEV_PLATFORM;
56 pdev->dev.platform_data = cobalt_serial8250_port;
57
58 retval = platform_device_add_resources(pdev, cobalt_uart_resource, ARRAY_SIZE(cobalt_uart_resource));
59 if (retval)
60 goto err_free_device;
61
62 retval = platform_device_add(pdev);
63 if (retval)
64 goto err_free_device;
65
66 return 0;
67
68 err_free_device:
69 platform_device_put(pdev);
70
71 return retval;
72 }
73 device_initcall(cobalt_uart_add);
74
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