On Tue, Apr 07, 2015 at 08:18:57PM +0200, Martin Sperl wrote: > > On 07.04.2015, at 19:40, Mark Brown <broonie@xxxxxxxxxx> wrote: > > For your workload perhaps. For some workloads they are very common > > (register reads are the most obvious example, they are typically a write > > transfer to provide the register address followed by a read transfer for > > the data). > Which spi_write_then_read collapses into a single transfer. No it doesn't. It creates a single message with two transfers (which is what I'd expect any user doing this to do, there are others that don't use the SPI helper APIs).
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