linux-kernel - Re: [PATCH v2 0/2] extcon: Add fsa9480 extcon driver

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Date:   Fri, 28 Jun 2019 11:28:11 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        Donggeun Kim <dg77.kim@...sung.com>
Cc:     MyungJoo Ham <myungjoo.ham@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH v2 0/2] extcon: Add fsa9480 extcon driver

On Fri, Jun 21, 2019 at 12:14 PM Paweł Chmiel
<pawel.mikolaj.chmiel@...il.com> wrote:

> This small patchset adds support for Fairchild Semiconductor FSA9480
> microUSB switch.
>
> It has been tested on Samsung Galaxy S and Samsung Fascinate 4G,
> but it can be found also on other Samsung Aries (s5pv210) based devices.
>
> Tomasz Figa (2):
>   dt-bindings: extcon: Add support for fsa9480 switch
>   extcon: Add fsa9480 extcon driver

This is surely an important driver since almost all elder Samsung
mobiles use this kind of switch. So
Acked-by: Linus Walleij <linus.walleij@...aro.org>

This driver I see is already sent to Greg for inclusion in the next kernel.
I just wonder if you guys are even aware of this driver for the same
hardware added by Donggeun Kim in 2011:
drivers/misc/fsa9480.c

That said I am all for pulling in this new driver because it is surely
better and supports device tree.

But can we please also send Greg a patch to delete the old driver
so we don't have two of them now?

The old driver have no in-tree users so it can be deleted without
side effects. Out-of-tree users can certainly adapt to the new
extcon driver.

If you want I can send a deletion patch for the misc driver?

Yours,
Linus Walleij