linux-kernel - Re: [PATCH] HID: wiimote: Fix wiimote mp scale linearization

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Message-ID: <alpine.LNX.2.00.1603181734540.3656@cbobk.fhfr.pm>
Date:	Fri, 18 Mar 2016 17:37:43 +0100 (CET)
From:	Jiri Kosina <jikos@...nel.org>
To:	David Herrmann <dh.herrmann@...il.com>
cc:	Cyan Ogilvie <cyan.ogilvie@...il.com>,
	David Herrmann <dh.herrmann@...glemail.com>,
	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	"open list:HID CORE LAYER" <linux-input@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] HID: wiimote: Fix wiimote mp scale linearization

On Thu, 17 Mar 2016, David Herrmann wrote:

> > @@ -2070,15 +2072,15 @@ static void wiimod_mp_in_mp(struct wiimote_data *wdata, const __u8 *ext)
> >         z -= 8192;
> >
> >         if (!(ext[3] & 0x02))
> > -               x *= 18;
> > +               x = (x * 2000 * 9) / 440;
> >         else
> >                 x *= 9;
> >         if (!(ext[4] & 0x02))
> > -               y *= 18;
> > +               y = (y * 2000 * 9) / 440;
> >         else
> >                 y *= 9;
> >         if (!(ext[3] & 0x01))
> > -               z *= 18;
> > +               z = (z * 2000 * 9) / 440;
> 
> So 2000/440 ~= 4.5, so this is exactly what the initial comment said.
> Patch looks good to me:
> 
> Reviewed-by: David Herrmann <dh.herrmann@...il.com>

Appplied to for-4.6/upstream-fixes. Thanks,

-- 
Jiri Kosina
SUSE Labs