Messages in this thread | | | Subject | Re: [PATCH v3 5/5] serial: 8250_dw: add em485 support | From | Giulio Benetti <> | Date | Tue, 2 Feb 2021 01:31:17 +0100 |
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Hi Andy,
Il 18/05/2020 17:21, Andy Shevchenko ha scritto: > 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?
8250_dw doesn't have a native RS485 support, do you mean using hardware RTS assertion? Anyway at the moment it's not present. This would be the first rs485 support added to 8250_dw.
Best regards -- Giulio Benetti CTO
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> ... > >> 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; >
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