下面的代码我是在8250_exar_st16c554.c基础上改的，使用的8250.c驱动，但系统启动时注册exar_device总是报错“
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WARNING: at fs/sysfs/dir.c:481 sysfs_add_one+0x8c/0xac()
sysfs: cannot create duplicate filename '/devices/platform/serial8250.6'
Modules linked in:
Backtrace:
[<c0018220>] (dump_bac”
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有帖子说是该用mapbase，但不管我用哪一个或几个，都是一样的错误，请大家帮忙看看到底是什么问题
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8250_exar_st16c554.c
static struct platform_device exar_device =
{
.name = "serial8250",
.id = PLAT8250_DEV_EXAR_ST16C554,
.dev = {
.platform_data = exar_data,
},
};
static void AM3359_SET_PORTDATA(struct plat_serial8250_port* pPort, unsigned int _base, int _irq)
{
//(pPort)->mapbase = _base;
(pPort)->membase = ioremap_nocache(_base, 512);
(pPort)->mapbase = _base;
(pPort)->iobase = _base;
printk("tl16c554: irq:%d base:%x,ioremap=%x\n", _irq,_base, (pPort)->membase);
(pPort)->irq = _irq;
(pPort)->uartclk = 25000000;
(pPort)->iotype = UPIO_MEM;
(pPort)->flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
(pPort)->regshift = 0;
(pPort)->irqflags = IRQF_TRIGGER_RISING;
}
static int __init exar_init(void)
{
int ret;
unsigned long mem_base;
printk(KERN_INFO "sct:exar_init\n ");
memset(exar_data, 0, sizeof(exar_data));
if (gpmc_cs_request(2, 512, (unsigned long *)&mem_base) < 0)
{
printk(KERN_ERR "exar_init:Failed request for GPMC mem for usrp_e\n");
return -1;
}
printk("Got CS%d, address = %lx\n",2,mem_base);
AM3359_SET_PORTDATA(exar_data, mem_base, UART1_INT);
ret=platform_device_register(&exar_device);
printk(KERN_INFO "sct:exar_init:ret=%d\n ",ret);
return ret;
}
module_init(exar_init);
MODULE_AUTHOR("Paul B Schroeder");
MODULE_DESCRIPTION("8250 serial probe module for Exar cards");
MODULE_LICENSE("GPL");
