release/src-rt-6.x.4708/linux/linux-2.6.36/arch/mips/wrppmc/serial.c

   1 /*
   2  *  Registration of WRPPMC 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 <asm/gt64120.h>
  27
  28 static struct resource wrppmc_uart_resource[] __initdata = {
  29         {
  30                 .start  = WRPPMC_UART16550_BASE,
  31                 .end    = WRPPMC_UART16550_BASE + 7,
  32                 .flags  = IORESOURCE_MEM,
  33         },
  34         {
  35                 .start  = WRPPMC_UART16550_IRQ,
  36                 .end    = WRPPMC_UART16550_IRQ,
  37                 .flags  = IORESOURCE_IRQ,
  38         },
  39 };
  40
  41 static struct plat_serial8250_port wrppmc_serial8250_port[] = {
  42         {
  43                 .irq            = WRPPMC_UART16550_IRQ,
  44                 .uartclk        = WRPPMC_UART16550_CLOCK,
  45                 .iotype         = UPIO_MEM,
  46                 .flags          = UPF_IOREMAP | UPF_SKIP_TEST,
  47                 .mapbase        = WRPPMC_UART16550_BASE,
  48         },
  49         {},
  50 };
  51
  52 static __init int wrppmc_uart_add(void)
  53 {
  54         struct platform_device *pdev;
  55         int retval;
  56
  57         pdev = platform_device_alloc("serial8250", -1);
  58         if (!pdev)
  59                 return -ENOMEM;
  60
  61         pdev->id = PLAT8250_DEV_PLATFORM;
  62         pdev->dev.platform_data = wrppmc_serial8250_port;
  63
  64         retval = platform_device_add_resources(pdev, wrppmc_uart_resource,
  65                                         ARRAY_SIZE(wrppmc_uart_resource));
  66         if (retval)
  67                 goto err_free_device;
  68
  69         retval = platform_device_add(pdev);
  70         if (retval)
  71                 goto err_free_device;
  72
  73         return 0;
  74
  75 err_free_device:
  76         platform_device_put(pdev);
  77
  78         return retval;
  79 }
  80 device_initcall(wrppmc_uart_add);