Hello.

???????????, 17 ??????? 2014, 17:57 +01:00 ?? Richard Genoud [off-list ref]:

The USART controller on sam9x5 chips (and also all AT91/SAMA5 chips
but at91rm9200) are not capable of handling DTR/DSR/DCD/RI signal.
Moreover, even if the controller can handle CTS/RTS, the dedicated
CTS/RTS pins are already muxed for other peripherals (LCDC/EMAC/MMC).

So this patchset adds the possibility to control those lines via GPIO,
as it is done for RTS in the patch "switch atmel serial to use gpiolib"

As it was suggested by Alexander Shiyan, I made that available for
every board.

Patch 1 implements the generic helpers to control modem lines via GPIO
Patches 2 and 3 are just a little tidy up of atmel_serial.c.
Patch 4 implements modem control lines in atmel_serial atmel_serial.
Patches 5 and 6 implement the get_direction() gpio call for at91, as
it is needed by gpiod_get_direction().
Patch 7 implement the interrupts of CTS/DSR/DCD/RI.

I still recommend split this series. The first patch must be a separate,
2 and 3 - independent to this series, 5 and 6 - to the appropriate mailing lists,
and finally as soon as all of the previous will be applied - you can send 7.

Thanks.
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