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    SubjectRe: [PATCH v3 5/5] serial: 8250_dw: add em485 support
    On Sun, May 17, 2020 at 11:56:10PM +0200, Heiko Stuebner wrote:
    > From: Giulio Benetti <giulio.benetti@micronovasrl.com>
    >
    > Need to use rs485 transceiver so let's use existing em485 485 emulation
    > layer on top of 8250.
    >
    > Add rs485_config callback to port and uses the standard em485 start and
    > stop helpers.

    Would it prevent to use native RS485 support?

    ...

    > p->serial_out = dw8250_serial_out;
    > p->set_ldisc = dw8250_set_ldisc;
    > p->set_termios = dw8250_set_termios;
    > + p->rs485_config = serial8250_em485_config;
    > + up->rs485_start_tx = serial8250_em485_start_tx;
    > + up->rs485_stop_tx = serial8250_em485_stop_tx;

    --
    With Best Regards,
    Andy Shevchenko


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