On Mon, Aug 18, 2014 at 03:43:27PM +0200, Cestonaro Thilo wrote:
> Hey,
>
> do I need to do something like:
> ----
> f = filp_open("/dev/ttyS0", O_RDWR | O_NOCTTY | O_NDELAY, 0600);
> fs=get_fs();
> set_fs(KERNEL_DS);
> ---
> Is there really no API for a uart attached device to communicate with it?
>
> That would be the last thing I thought of :(.
Wait, you want to talk to a serial port from within the kernel? No,
don't open the device node, just talk directly to the tty layer. An
example of code that does this is some of the bluetooth layer.
good luck,
greg k-h
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