ASoC: ab8500: Validate and program TDM slots correctly

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The interface clock ratio is selected from the slot count alone, ffs()
and fls() produce one-based hardware slot numbers, eight-channel mode
does not program any mappings, and all register errors are ignored.
Invalid masks can also leave a partially programmed interface.

Validate the complete configuration first, derive the supported BCLK
ratio from slots times slot width, use zero-based slot indices, program
deterministic eight-channel maps, and propagate register failures.

Fixes: 679d7abdc7 ("ASoC: codecs: Add AB8500 codec-driver")
Assisted-by: LLM
Signed-off-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260831-ab8500-codec-fixes-v1-4-f85024e717e3@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>

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Linus Walleij 2026-08-31 22:29:09 +02:00 • committed by Mark Brown

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sound/soc/codecs/ab8500-codec.c

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