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authorCharles Keepax <ckeepax@opensource.cirrus.com>2025-01-07 18:44:06 +0300
committerMark Brown <broonie@kernel.org>2025-01-07 23:21:00 +0300
commit5bc493bf0c37c157bf2eb364e55a1c6f8bc43a69 (patch)
tree2dafea3e18c4f96b4f6dd75d365e3b59be1ec21a /scripts/extract-fwblobs
parentfdd9ef3dce98e035d21c17fac587cb6e3c7706fd (diff)
downloadlinux-5bc493bf0c37c157bf2eb364e55a1c6f8bc43a69.tar.xz
regmap: sdw-mbq: Add support for SDCA deferred controls
The SDCA specification allows for controls to be deferred. In the case of a deferred control the device will return COMMAND_IGNORED to the 8-bit operation that would cause the value to commit. Which is the final 8-bits on a write, or the first 8-bits on a read. In the case of receiving a defer, the regmap will poll the SDCA function busy bit, after which the transaction will be retried, returning an error if the function busy does not clear within a chip specific timeout. Since this is common SDCA functionality which is the 99% use-case for MBQs it makes sense to incorporate this functionality into the register map. If no MBQ configuration is specified, the behaviour will default to the existing behaviour. Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com> Link: https://patch.msgid.link/20250107154408.814455-5-ckeepax@opensource.cirrus.com Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.dev> Signed-off-by: Mark Brown <broonie@kernel.org>
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