linux-kernel - Re: [PATCH v2 1/5] HID: magicmouse: register power supply

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Date:   Wed, 28 Jul 2021 11:58:03 +0200
From:   José Expósito <jose.exposito89@...il.com>
To:     Jiri Kosina <jikos@...nel.org>
Cc:     benjamin.tissoires@...hat.com, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/5] HID: magicmouse: register power supply

On Wed, Jul 28, 2021 at 11:35:20AM +0200, Jiri Kosina wrote:
> On Fri, 25 Jun 2021, José Expósito wrote:
> 
> > > > [...]
> > > > v2: Add depends on USB_HID to Kconfig
> > > 
> > > Hmm, why is this dependency needed in the first place, please? I think 
> > > trying to keep the drivers independent on transport drivers (especially in 
> > > cases like this, where more variants of physical transports actually 
> > > really do exist) is worth trying.
> > 
> > Sorry, that's something I should have explained in the changelog.
> > 
> > Intel's test bot reported compilation errors on the first version of the patch
> > when USB support wasn't configured:
> > https://lore.kernel.org/patchwork/patch/1425313/
> > 
> > I was kindly pointed to a similar error and its fix, but, maybe in this case this
> > is not the right fix?
> > Maybe there is a macro that I can use to wrap the USB related code in an #ifdef?
> 
> It can certainly be wrapped, but looking into the code now, it probably 
> wouldn't really bring more clarity. I will apply the series with adding 
> the USB_HID dependency for now.

Hi Jiri,

I've been investigating a bit about this issue and I think this might not be the
righ solution for the problem.

John Chen's patch (9de07a4e8d4cb269f9876b2ffa282b5ffd09e05b):
https://lore.kernel.org/lkml/20210327130508.24849-5-johnchen902@gmail.com/

Already adds battery reporting over bluetooth, so my patch is redundant... And worse
than his, I should add.

I was investigating how to do something similar over USB, but I couldn't finish a patch yet.

So, if you don't mind, I'd prefer not to apply this patchset yet until I figure out
a better solution on v3.

Thanks,
Jose