Question: switching alternate pin functions in bcm2835

[Stephan Böttcher <linux@xxxxxxxx>]

Moin,

is it appropriate to ask user questions here? 

On a Raspberry Pi 2B, I connected the UART pins among others to an
ATtiny µC to use avrdude in linuxgpio bit-banging mode to flash the
program, and then use the same pins to talk to the ATtiny via
/dev/ttyAMA0.  After a reboot I can use the serial port.  After using
gpio on those pins, the serial link does not receive anything.  There
are not errors opening, writing, or reading /dev/ttyAMA0.  Just no
answer.

Is there a way (sysfs, ioclt, …) to reconnect the pins to the UART
without a reboot?

Thanks!

Gruß,
-- 
Stephan