linux-kernel - Re: [PATCH 07/19] serdev: Allows dynamic creation of devices via sysfs

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Message-ID: <CAL_JsqKRqKJmPc-QQBcN9j5=_y+MH+Rn1aZNun=MAgBMpvDL2w@mail.gmail.com>
Date:   Tue, 29 May 2018 10:38:09 -0500
From:   Rob Herring <robh@...nel.org>
To:     Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "open list:SERIAL DRIVERS" <linux-serial@...r.kernel.org>,
        Johan Hovold <johan@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>
Subject: Re: [PATCH 07/19] serdev: Allows dynamic creation of devices via sysfs

On Tue, May 29, 2018 at 8:10 AM, Ricardo Ribalda Delgado
<ricardo.ribalda@...il.com> wrote:
> Allow creating and deleting devices via sysfs. Devices created will be
> matched to serdev drivers via modalias (the string provided by the user)
> and deleted via their name. Eg:
>
>  # Create device
> root@...022:~# echo ttydev > /sys/bus/serial/devices/serial0/new_device
>
>  # Delete device
> root@...022:~#
>         echo serial0-0 > /sys/bus/serial/devices/serial0/delete_device

I think the model here should be the kernel provides dummy slave
device for each serial port and then you can use bind and unbind to
bind to a particular driver.

Rob