Hi Greg,

Thanks for your response.

On Tue, May 23, 2017 at 12:04 PM, Greg KH <greg@kroah.com> wrote:

On Tue, May 23, 2017 at 11:58:31AM +0530, Madhu K wrote:
> Hi All,
>
> why there is no character device entry present in /sys/class? where as block
> and net device entries are present.

I see character devices there, but not the device nodes. I don't see
block device nodes there either.

If I am wrong please correct me, there is a folder called block in /sys/class. is block not containing block device nodes?

> Not only in /sys/class, for that matter why there is no character device
> entries present in /sys file system.

What do you exactly mean by "character device entries"?

like block and net why there is no char folder

> please help me to understand for what purpose char devices are kept away from /
> sys file system.

Have you read the driver model chapter in the Linux Device drivers book,
or the in-kernel sysfs documentation?

thanks,

greg k-h