>>>>> "Stefan" == Stefan Schoenleitner <dev.c0debabe@xxxxxxxxx> writes:
Hi,
Stefan> There is the linux/drivers/char/atmel_serial.c driver which I
Stefan> could modify, so that it also includes the driver code for
Stefan> the speech codec. However, obviously that would be a really
Stefan> bad idea since it would duplicate code and completely bypass
Stefan> the linux serial port abstraction layer.
Stefan> It would be better to somehow write a speech codec driver
Stefan> that depends on the UART driver. Thus on the speech codec
Stefan> serial port no ttySn device should be created by the UART
Stefan> driver, but instead the speech codec driver should create the
Stefan> device (e.g. /dev/speechcodec0). Since the speech codec
Stefan> driver should only do speech codec specific tasks, it should
Stefan> use the UART driver to send and receive data over the serial
Stefan> port.
The input layer has serio infrastructure for this (E.G. for serial
mice/touchscreens). Now, a speech codec doesn't have much to do with
input devices, but it atleast clearly seperates the lowlevel uart
communication from the speech codec handling.
Have a look in drivers/input/{serio,touchscreen}.
--
Bye, Peter Korsgaard
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