tty/serial: atmel: split tx and rx paths
Split TX and RX paths to not schedule RX tasklet on TX events and vice versa. Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: NLudovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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