linux-kernel - Re: [PATCH 7/7] serial: 8250_dw: allow enable rs485 at boot time

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Message-ID: <13430289.tR4kZXp1X6@diego>
Date:   Wed, 18 Mar 2020 19:28:12 +0100
From:   Heiko Stübner <heiko@...ech.de>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     gregkh@...uxfoundation.org, jslaby@...e.com,
        matwey.kornilov@...il.com, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Giulio Benetti <giulio.benetti@...ronovasrl.com>
Subject: Re: [PATCH 7/7] serial: 8250_dw: allow enable rs485 at boot time

Am Mittwoch, 18. März 2020, 16:16:15 CET schrieb Andy Shevchenko:
> On Wed, Mar 18, 2020 at 03:26:40PM +0100, Heiko Stuebner wrote:
> > From: Giulio Benetti <giulio.benetti@...ronovasrl.com>
> > 
> > If "linux,rs485-enabled-at-boot-time" is specified need to setup 485
> > in probe function.
> > 
> > Call uart_get_rs485_mode() to get rs485 configuration, then call
> > rs485_config() callback directly to setup port as rs485.
> 
> I think you really need to Cc the new version of this to Lukas.
> Because I have a deja vu that I have seen half of this to be similar what he
> had done in his work.

Could you give me a pointer to that work?

When I initially searched for previous rs485 on 8250_dw stuff I only
found the series from 2018 I linked to in the cover-letter, so if there
is other work somewhere else a pointer to it would be very helpful
for me.

Thanks
Heiko