Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm
[linux-2.6] / arch / mips / cobalt / serial.c
1 /*
2  *  Registration of Cobalt UART platform device.
3  *
4  *  Copyright (C) 2007  Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
5  *
6  *  This program is free software; you can redistribute it and/or modify
7  *  it under the terms of the GNU General Public License as published by
8  *  the Free Software Foundation; either version 2 of the License, or
9  *  (at your option) any later version.
10  *
11  *  This program is distributed in the hope that it will be useful,
12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *  GNU General Public License for more details.
15  *
16  *  You should have received a copy of the GNU General Public License
17  *  along with this program; if not, write to the Free Software
18  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
19  */
20 #include <linux/errno.h>
21 #include <linux/init.h>
22 #include <linux/ioport.h>
23 #include <linux/platform_device.h>
24 #include <linux/serial_8250.h>
25
26 #include <cobalt.h>
27 #include <irq.h>
28
29 static struct resource cobalt_uart_resource[] __initdata = {
30         {
31                 .start  = 0x1c800000,
32                 .end    = 0x1c800007,
33                 .flags  = IORESOURCE_MEM,
34         },
35         {
36                 .start  = SERIAL_IRQ,
37                 .end    = SERIAL_IRQ,
38                 .flags  = IORESOURCE_IRQ,
39         },
40 };
41
42 static struct plat_serial8250_port cobalt_serial8250_port[] = {
43         {
44                 .irq            = SERIAL_IRQ,
45                 .uartclk        = 18432000,
46                 .iotype         = UPIO_MEM,
47                 .flags          = UPF_IOREMAP | UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
48                 .mapbase        = 0x1c800000,
49         },
50         {},
51 };
52
53 static __init int cobalt_uart_add(void)
54 {
55         struct platform_device *pdev;
56         int retval;
57
58         /*
59          * Cobalt Qube1 has no UART.
60          */
61         if (cobalt_board_id == COBALT_BRD_ID_QUBE1)
62                 return 0;
63
64         pdev = platform_device_alloc("serial8250", -1);
65         if (!pdev)
66                 return -ENOMEM;
67
68         pdev->id = PLAT8250_DEV_PLATFORM;
69         pdev->dev.platform_data = cobalt_serial8250_port;
70
71         retval = platform_device_add_resources(pdev, cobalt_uart_resource, ARRAY_SIZE(cobalt_uart_resource));
72         if (retval)
73                 goto err_free_device;
74
75         retval = platform_device_add(pdev);
76         if (retval)
77                 goto err_free_device;
78
79         return 0;
80
81 err_free_device:
82         platform_device_put(pdev);
83
84         return retval;
85 }
86 device_initcall(cobalt_uart_add);