linux-kernel - Re: [PATCH v2] drm: rcar-du: calculate DPLLCR to be more small jitter

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Message-ID: <876098eu1d.wl%kuninori.morimoto.gx@renesas.com>
Date:   Fri, 15 Dec 2017 00:13:24 +0000
From:   Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        David Airlie <airlied@...ux.ie>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] drm: rcar-du: calculate DPLLCR to be more small jitter


Hi Geert, Laurent

> >> Yes, but compiled by 32bit too, right ?
> >> Without this "ll", 32bit compiler say
> >>
> >>       warning: this decimal constant is unsigned only in ISO C90
> >
> > That's right. How about 4096000000UL then, to force unsigned integer types ?
> > Or possibly even better, 4096 * 1000 * 1000UL to make it more readable ?
> 
> If it's just about making the number unsigned, and not about 64-bit arithmetic,
> a "U" suffix should be sufficient.

Thanks.
Will try

Best regards
---
Kuninori Morimoto