• Simon Horman's avatar
    gpio: rcar: add gen[123] fallback compatibility strings · dbd1dad2
    Simon Horman authored
    Add fallback compatibility string for R-Car Gen 1, 2 and 3.
    In the case of Renesas R-Car hardware we know that there are generations of
    SoCs, f.e. 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.
    Also deprecate renesas,gpio-rcar as its name is more generic than its
    Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
    Reviewed-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
    Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
gpio-rcar.c 14.1 KB