From mboxrd@z Thu Jan 1 00:00:00 1970 From: Geert Uytterhoeven Subject: Re: [PATCH] ata: sata_rcar: add gen[23] fallback compatibility strings Date: Tue, 11 Jul 2017 19:47:08 +0200 Message-ID: References: <1499773460-8930-1-git-send-email-horms+renesas@verge.net.au> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Return-path: In-Reply-To: <1499773460-8930-1-git-send-email-horms+renesas@verge.net.au> Sender: linux-renesas-soc-owner@vger.kernel.org To: Simon Horman Cc: Tejun Heo , "linux-ide@vger.kernel.org" , Linux-Renesas , Magnus Damm , Rob Herring , "devicetree@vger.kernel.org" , Geert Uytterhoeven List-Id: devicetree@vger.kernel.org On Tue, Jul 11, 2017 at 1:44 PM, Simon Horman wrote: > Add fallback compatibility string for R-Car Gen 2 and 3. > > In the case of Renesas R-Car hardware we know that there are generations of > SoCs, e.g. Gen 1 and 2. But beyond that its not clear what the relationship > between IP blocks might be. For example, I believe that r8a7790 is older > than r8a7791 but that doesn't imply that the latter is a descendant of the > former or vice versa. > > We can, however, by examining the documentation and behaviour of the > hardware at run-time observe that the current driver implementation appears > to be compatible with the IP blocks on SoCs within a given generation. > > For the above reasons and convenience when enabling new SoCs a > per-generation fallback compatibility string scheme being adopted for > drivers for Renesas SoCs. > > Signed-off-by: Simon Horman Reviewed-by: Geert Uytterhoeven 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