[alsa-devel] SPI PCM capture device examples please

Matt Flax flatmax at flatmax.org
Thu Nov 14 02:01:17 CET 2013

I guess that IIO support for ASLA is not on the cards ?


On 13/11/13 23:07, Matt Flax wrote:
> Hi there,
> Is it possible to write an ALSA driver for a device which already has 
> an SPI driver ?
> I have been trying to look for examples in the ALSA kernel source 
> tree, however all the drivers I have looked at use SPI to control the 
> codecs .... there must be an example where the codec uses SPI for PCM 
> data ?
> If someone is aware of any codecs which use SPI for PCM data can you 
> please link me to the example driver code ?
> The device I am interested in operates in slave SPI mode and only has 
> ADCs, so it only has one input SPI line (and other necessary lines, 
> such as clk). Its data sample rates are up to 1 M Hz.
> Here is a link to the SPI driver in question :
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/iio/adc/ad7476.c?id=HEAD 
> thanks
> Matt
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