linux/arch/mips/wrppmc/serial.c
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   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
  28static 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
  41static 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
  52static __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
  75err_free_device:
  76        platform_device_put(pdev);
  77
  78        return retval;
  79}
  80device_initcall(wrppmc_uart_add);
  81
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