linux-kernel - Re: [PATCH 0/9] Serial slave device bus

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Message-ID: <CAL_JsqJHyQa9zeAzHVatRwWnH04nP35ykDLXD8C_1NSJucrkKA@mail.gmail.com>
Date:   Tue, 10 Jan 2017 11:24:06 -0600
From:   Rob Herring <robh@...nel.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Marcel Holtmann <marcel@...tmann.org>,
        Jiri Slaby <jslaby@...e.com>,
        Sebastian Reichel <sre@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        "Dr . H . Nikolaus Schaller" <hns@...delico.com>,
        Peter Hurley <peter@...leysoftware.com>,
        Alan Cox <gnomes@...rguk.ukuu.org.uk>,
        Loic Poulain <loic.poulain@...el.com>,
        Pavel Machek <pavel@....cz>, NeilBrown <neil@...wn.name>,
        Linus Walleij <linus.walleij@...aro.org>,
        "open list:BLUETOOTH DRIVERS" <linux-bluetooth@...r.kernel.org>,
        "linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/9] Serial slave device bus

On Sat, Jan 7, 2017 at 5:00 AM, Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
> On Fri, 2017-01-06 at 10:26 -0600, Rob Herring wrote:
>> Here goes another attempt at a serial device bus (aka uart slaves, tty
>> slaves, etc.).
>>
>> After some discussions with Dmitry at LPC, I decided to move away from
>> extending serio and moved back to making a new bus type instead. He
>> didn't
>> think using serio was a good fit, and serio has a number of
>> peculiarities
>> in regards to sysfs and it's driver model. I don't think we want to
>> inherit
>> those for serial slave devices.
>>
>> This version sits on top of tty_port rather than uart_port as Alan
>> requested. Once I created a struct tty rather than moving everything
>> needed to tty_port, it became a lot easier and less invasive to the
>> tty
>> core code.
>>
>> I have hacked up versions of the BT ldisc and TI ST drivers moved over
>> to
>> use the serdev bus. I have BT working on the HiKey board which has TI
>> BT.
>> With the serdev bus support, it eliminates the need for the TI
>> userspace
>> UIM daemon.
>>
>> This series and the mentioned drivers can be found here[1].
>
> For patches 1-4:
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Thanks.

> Regarding to naming. Why can't we just name bus "serial"? If you are
> worrying about folder name under drivers/tty, I can propose at lease
> couple of options serialdev, serialbus.

Naming is hard, right?

I have don't have too much opinion on what the name should be. I just
came up with something unique and inspired by serio. It is a bit
easier to grep for serdev rather than just serial.

Rob