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Linux/arch/mips/cobalt/serial.c

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  1 /*
  2  *  Registration of Cobalt UART platform device.
  3  *
  4  *  Copyright (C) 2007  Yoichi Yuasa <yuasa@linux-mips.org>
  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);
 87 

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