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Date: Mon, 18 May 2020 09:58:57 +0100 From: "Lad, Prabhakar" <prabhakar.csengg@...il.com> To: Wolfram Sang <wsa+renesas@...g-engineering.com> Cc: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>, Geert Uytterhoeven <geert+renesas@...der.be>, Jens Axboe <axboe@...nel.dk>, Rob Herring <robh+dt@...nel.org>, Ulf Hansson <ulf.hansson@...aro.org>, Sergei Shtylyov <sergei.shtylyov@...entembedded.com>, "David S. Miller" <davem@...emloft.net>, Wim Van Sebroeck <wim@...ux-watchdog.org>, Guenter Roeck <linux@...ck-us.net>, linux-ide@...r.kernel.org, "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" <devicetree@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>, linux-i2c@...r.kernel.org, Linux MMC List <linux-mmc@...r.kernel.org>, netdev <netdev@...r.kernel.org>, Linux-Renesas <linux-renesas-soc@...r.kernel.org>, linux-watchdog@...r.kernel.org Subject: Re: [PATCH 03/17] ARM: dts: r8a7742: Add I2C and IIC support Hi Wolfram, Thank for the review. On Fri, May 15, 2020 at 6:10 PM Wolfram Sang <wsa+renesas@...g-engineering.com> wrote: > > On Fri, May 15, 2020 at 04:08:43PM +0100, Lad Prabhakar wrote: > > Add the I2C[0-3] and IIC[0-3] devices nodes to the R8A7742 device tree. > > > > Automatic transmission for PMIC control is not available on IIC3 hence > > compatible string "renesas,rcar-gen2-iic" and "renesas,rmobile-iic" is > > not added to iic3 node. > > Makes sense. > > However, both versions (with and without automatic transmission) are > described with the same "renesas,iic-r8a7742" compatible. Is it possible > to detect the reduced variant at runtime somehow? > I couldn't find anything the manual that would be useful to detect at runtime. > My concern is that the peculiarity of this SoC might be forgotten if we > describe it like this and ever add "automatic transmissions" somewhen. > Agreed. Cheers, --Prabhakar
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