Re: is there a struct uart_driver like struct i2c_driver

[Greg KH <greg@kroah.com>]

On Tue, Aug 19, 2014 at 02:45:47PM +0200, Cestonaro Thilo wrote:
> On 19.08.2014 14:39, Greg KH wrote:
> > On Tue, Aug 19, 2014 at 02:25:57PM +0200, Cestonaro Thilo wrote:
> >>> You might want to step back and describe what you are wanting to do in
> >>> the first place before wanting to add a new line discipline.
> >>>
> >>>
> >> Ok.
> >> Imagine you have two chips, one is the cpu and the other one is a device
> >> which needs to be configured, accessed, talked to via uart.
> >> The both chips are hardwired via uart.
> >> Now I want to communicate from the kernel module with the device.
> > Why within the kernel?  Why not do the communication from userspace?
> Cause it's a rtc, and I don't know of a way to have a /dev/rtc from
> userspace
> 
> >
> >> let the device be a RTC Device which has a UART interface.
> > How do you talk to this UART?  Through a "normal" serial chip that the
> > kernel already has a driver for, or through some other hardware control
> > interface?
> Jup, via normal serial chip.
> 
> >
> >> And I don't want to rewrite all the uart device stuff of the cpu uart
> >> device.
> > What do you mean by this?
> As it is via a normal serial chip, one option would be to write a
> sperate driver which includes all the register stuff from the original
> serial chip module.
> But this, I don't want to do.

Try using the serio interface, it should do this all for you.

greg k-h