From mboxrd@z Thu Jan 1 00:00:00 1970 From: Geert Uytterhoeven Subject: Re: [PATCH spi/for-next] spi: sh-msiof: Add R-Car Gen 2 and 3 fallback bindings Date: Tue, 13 Dec 2016 14:51:17 +0100 Message-ID: References: <1481536175-17238-1-git-send-email-horms+renesas@verge.net.au> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Cc: Mark Brown , Geert Uytterhoeven , Magnus Damm , linux-spi , Linux-Renesas To: Simon Horman Return-path: In-Reply-To: <1481536175-17238-1-git-send-email-horms+renesas@verge.net.au> Sender: linux-renesas-soc-owner@vger.kernel.org List-Id: linux-spi.vger.kernel.org On Mon, Dec 12, 2016 at 10:49 AM, Simon Horman wrote: > In the case of Renesas R-Car hardware we know that there are generations of > SoCs, e.g. Gen 2 and Gen 3. But beyond that it's 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 is being adopted for > drivers for Renesas SoCs. > > Also: > * Deprecate renesas,sh-msiof. It seems poorly named as it is only > compatible with SH-Mobile. It also appears unused in mainline. > > 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