linux-kernel - Re: [PATCH v5 2/3] HID: quirks: Refactor ELAN 400 and 401 handling

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Date:   Wed, 12 Jun 2019 09:38:48 -0600
From:   Jeffrey Hugo <jhugo@...eaurora.org>
To:     Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Jiri Kosina <jikos@...nel.org>,
        Jeffrey Hugo <jeffrey.l.hugo@...il.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Lee Jones <lee.jones@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Andy Gross <agross@...nel.org>,
        David Brown <david.brown@...aro.org>,
        Hans de Goede <hdegoede@...hat.com>,
        "linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
        DTML <devicetree@...r.kernel.org>,
        "open list:ARM/QUALCOMM SUPPORT" <linux-arm-msm@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 2/3] HID: quirks: Refactor ELAN 400 and 401 handling

On 6/12/2019 9:21 AM, Benjamin Tissoires wrote:
> On Wed, Jun 12, 2019 at 5:14 PM Dmitry Torokhov
> <dmitry.torokhov@...il.com> wrote:
>>
>> On Wed, Jun 12, 2019 at 7:45 AM Jiri Kosina <jikos@...nel.org> wrote:
>>>
>>> On Tue, 11 Jun 2019, Dmitry Torokhov wrote:
>>>
>>>>> +static const char *hid_elan_i2c_ignore[] = {
>>>>
>>>> If this is a copy of elan whitelist, then, if we do not want to bother
>>>> with sharing it in object form (as a elan-i2c-ids module), can we at
>>>> least move it into include/linux/input/elan-i2c-ids.h and consume from
>>>> hid-quirks.c?
>>>
>>> Let's just not duplicate it in both objects. Why not properly export it
>>> from hid_quirks?
>>
>> Strictly speaking Elan does not depend on HID; exporting it from
>> quirks would mean adding this dependency. This also mean that you
>> can't make Elan built-in while keeping HID as a module (I think this
>> at least used to be config on some Chromebooks).
>>
> 
> I also think it would me things cleaner to have the list of devices in elan_i2c.
> If we put the list of devices supported by elan_i2c in a header, and
> have HID read this .h file directly, there will be no runtime
> dependency.
> 
> I am sure we can work something out to remove Jeffrey's fears.

Works for me.  I plan to have the next rev posted by the end of the week.