From mboxrd@z Thu Jan 1 00:00:00 1970 From: Geert Uytterhoeven Subject: Re: [PATCH 07/13] ARM: dts: r8a7792: initial SoC device tree Date: Fri, 17 Jun 2016 08:27:24 +0200 Message-ID: References: <13205049.n7pM8utpHF@wasted.cogentembedded.com> <2539026.OyU5nvpxa6@wasted.cogentembedded.com> <20160601005751.GG20527@verge.net.au> <20160610010245.GA10152@verge.net.au> <8efb1c7e-5463-2556-744c-d327886d92d4@cogentembedded.com> <1b9a4cf4-1101-ccbf-772b-49b8a689a1b6@cogentembedded.com> <87eg80d1m9.wl%kuninori.morimoto.gx@renesas.com> <87a8iko9dm.wl%kuninori.morimoto.gx@renesas.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Return-path: In-Reply-To: <87a8iko9dm.wl%kuninori.morimoto.gx@renesas.com> Sender: linux-renesas-soc-owner@vger.kernel.org To: Kuninori Morimoto Cc: Sergei Shtylyov , Simon Horman , "open list:MEDIA DRIVERS FOR RENESAS - FCP" , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , "devicetree@vger.kernel.org" , Magnus Damm , Russell King , "linux-arm-kernel@lists.infradead.org" List-Id: devicetree@vger.kernel.org Hi Morimoto-san, On Fri, Jun 17, 2016 at 4:14 AM, Kuninori Morimoto wrote: >> > Right, I had forgotten about that. >> > Fortunately the clk-rcar-gen2 driver has a sane failure mode for this case ;-) >> > >> > it seems the RCAN clock can just be modeled as a fixed clock. However, >> > its divider value isn't clear to me, as 15.9 MHz cannot be generated from PLL1 >> > using an integer divider. Morimoto-san, can you please ask for clarification? >> >> OK. >> Now, I asked to HW team about that. >> Please wait. > > RCAN divider is fixed for 1/49 > > PLL1 (= 1560MHz) > -> 1/2 (= 780MHz) > -> RCAN divider 1/49 (= 15.9183..MHz) > > Is this clear for you ? Thanks, that's exactly what we need to know. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds