[alsa-devel] ASoC: special SPI format for that5173 driver in daisy chain mode

[Christian Schörkhuber]

Hi all,

I'm working on an ASoC driver for the THAT5173 microphone preamplifier 
which is controlled via SPI. When operating in daisy chain mode (4 amps) 
the desired format is a bit odd: I need to write four 16 bit spi 
commands (one gain setting for each amp) in a row without raising the 
chipselect line between commands.
That is, I need to write one 64 bit SPI command that is composed of 4 
different values (and 4 register addresses which are all 0).

Usually I use regmap but I don't see how I can construct such a message 
with regmap. How can this be done (with or without regmap)?

Thanks,
Chris