serial.c
2.11 KB
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/*
* Registration of Cobalt UART platform device.
*
* Copyright (C) 2007 Yoichi Yuasa <yuasa@linux-mips.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/platform_device.h>
#include <linux/serial_8250.h>
#include <cobalt.h>
#include <irq.h>
static struct resource cobalt_uart_resource[] __initdata = {
{
.start = 0x1c800000,
.end = 0x1c800007,
.flags = IORESOURCE_MEM,
},
{
.start = SERIAL_IRQ,
.end = SERIAL_IRQ,
.flags = IORESOURCE_IRQ,
},
};
static struct plat_serial8250_port cobalt_serial8250_port[] = {
{
.irq = SERIAL_IRQ,
.uartclk = 18432000,
.iotype = UPIO_MEM,
.flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
.mapbase = 0x1c800000,
},
{},
};
static __init int cobalt_uart_add(void)
{
struct platform_device *pdev;
int retval;
/*
* Cobalt Qube1 has no UART.
*/
if (cobalt_board_id == COBALT_BRD_ID_QUBE1)
return 0;
pdev = platform_device_alloc("serial8250", -1);
if (!pdev)
return -ENOMEM;
pdev->id = PLAT8250_DEV_PLATFORM;
pdev->dev.platform_data = cobalt_serial8250_port;
retval = platform_device_add_resources(pdev, cobalt_uart_resource, ARRAY_SIZE(cobalt_uart_resource));
if (retval)
goto err_free_device;
retval = platform_device_add(pdev);
if (retval)
goto err_free_device;
return 0;
err_free_device:
platform_device_put(pdev);
return retval;
}
device_initcall(cobalt_uart_add);