linux-kernel - Re: [PATCH v4] HID: i2c-hid: add polling mode based on connected GPIO chip's pin status

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Message-ID: <B3Hx1v5x_ZWS8XSi8-0vZov1KLuINEHyS5yDUGBaoBN4d9wTi9OlCoFX1h6sqYG8dCZr_OKcKeImWX9eyKh8X4X3ZMdAUQ-KVwmG5e9LJeI=@protonmail.com>
Date:   Tue, 08 Dec 2020 21:59:20 +0000
From:   Barnabás Pőcze <pobrn@...tonmail.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     Coiby Xu <coiby.xu@...il.com>,
        "linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
        Helmut Stult <helmut.stult@...info.de>,
        Baq Domalaq <domalak@...il.com>,
        Pedro Ribeiro <pedrib@...il.com>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4] HID: i2c-hid: add polling mode based on connected GPIO chip's pin status

2020. november 25., szerda 16:07 keltezéssel, Greg KH írta:

> [...]
> > +static u8 polling_mode;
> > +module_param(polling_mode, byte, 0444);
> > +MODULE_PARM_DESC(polling_mode, "How to poll (default=0) - 0 disabled; 1 based on GPIO pin's status");
>
> Module parameters are for the 1990's, they are global and horrible to
> try to work with. You should provide something on a per-device basis,
> as what happens if your system requires different things here for
> different devices? You set this for all devices :(
> [...]

Hi

do you think something like what the usbcore has would be better?
A module parameter like "quirks=<vendor-id>:<product-id>:<flags>[,<vendor-id>:<product-id>:<flags>]*"?


Regards,
Barnabás Pőcze