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Commit d647c19951 ("regmap: add DT endianness binding support") had
some issues. Commit ba1b53feb8 ("regmap: Fix DT endianess parsing
logic") fixed the main problem. This patch fixes the other.
Specifically, restore the overall default of REGMAP_ENDIAN_BIG if none of
the config, DT, or the bus specify any endianness. Without this,
of_regmap_get_endian() could return REGMAP_ENDIAN_DEFAULT, which the
calling code can't handle. Since all busses do specify an endianness in
the current code, this makes no difference right now, but I saw no
justification in the patch description for removing this final default.
Also, clean up the code a bit:
* s/of_regmap_get_endian/regmap_get_endian/ since the function isn't DT-
specific, even if the reason it was originally added was to add some
DT-specific features.
* After potentially reading an endianess specification from DT, the code
checks whether DT did specify an endianness, and if so, returns it. Move
this test outside the whole switch statement so that if the
REGMAP_ENDIAN_REG case ever modifies *endian, this check will pick that
up. This partially reverts part of commit ba1b53feb8 ("regmap: Fix DT
endianess parsing logic"), while maintaining the bug-fix that commit
made to this code.
* Make the comments briefer, and only refer to the specific action taken
at their location. This makes most of the comments independent of DT,
and easier to follow.
Cc: Xiubo Li <Li.Xiubo@freescale.com>
Cc: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Cc: Thierry Reding <treding@nvidia.com>
Fixes: d647c19951 ("regmap: add DT endianness binding support")
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
45e1a279ce