From mboxrd@z Thu Jan 1 00:00:00 1970 From: geert@linux-m68k.org (Geert Uytterhoeven) Date: Fri, 13 Oct 2017 14:52:31 +0200 Subject: [PATCH v3 01/10] ARM: dts: r8a7778: Use R-Car GPIO Gen1 fallback compat string In-Reply-To: <20171013123311.15278-2-horms+renesas@verge.net.au> References: <20171013123311.15278-1-horms+renesas@verge.net.au> <20171013123311.15278-2-horms+renesas@verge.net.au> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Fri, Oct 13, 2017 at 2:33 PM, Simon Horman wrote: > Use newly added R-Car GPIO Gen1 fallback compat string > in place of now deprecated non-generation specific > R-Car GPIO fallback compat string in DT of r8a7778 SoC. > > As the driver does not match on "renesas,gpio-r8a7778" there > are some run-time considerations for this patch: > > * When a resulting DTB is used with kernels newer than v4.14 this should > not have any run-time effect as renesas,rcar-gen1-gpio is matched by the > driver since commit dbd1dad2ab8f ("gpio: rcar: add gen[123] fallback > compatibility strings") > > * However, when used with older kernels GPIO will be disabled as > no compat string match will be made by the driver. > > The regression documented above for the new DTB with old kernel case > is acceptable in my opinion. > > Signed-off-by: Simon Horman > --- > v3 > * Consistently use gen1 rather than gen2 binding in patch and refer to it > in changelog. > > v2 > * Note run-time considerations in changelog as pointed out by > Geert Uytterhoeven > > Signed-off-by: Simon Horman Reviewed-by: Geert Uytterhoeven Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at 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