Re: problem with MKDEV

[helight <helight@xxxxxxx>]

Manila Goel wrote:
> Hello all,
> i m writing a character driver for linux 2.6.14 and want to create a device
> in /dev folder at insmod, for that i m using
>
> MKDEV(major, 1); in m y driver code
>
> but it's not creating any device but giving a warning as under:
>
> drivers/char/testled.c:123: warning: statement with no effect
>
> so, how can i do it ,  is there any alternate method also to do the same.
>
>
> thanks & regards
> Manila
>   
you can try this code:

    mydev_class = class_create(THIS_MODULE, "mydev");
    if (IS_ERR(mydev_class)) {
        printk(KERN_INFO "create class error\n");
        return -1;
    }
    class_device_create(mydev_class, NULL, devid, NULL, "led" "%d", 
MINOR(devid)); 

-- 
---------------------------------
Zhenwen Xu - Open and Free
Home Page:   http://dim4.cn
Gtalk:       helight.xu@xxxxxxxxx



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