On Wed, Aug 01, 2018 at 06:17:47PM +0300, Stefan Popa wrote: > From: Crestez Dan Leonard <leonard.crestez@xxxxxxxxx> > > The regmap API usually assumes that bulk read operations will read a > range of registers but some I2C/SPI devices have certain registers for > which a such a read operation will return data from an internal FIFO > instead. Add an explicit API to support bulk read with pipe rather than > range semantics. If we're going to do this it's probably best to explicitly mark the registers where it will work otherwise we'll end up confusing ourselves and corrupting data at some point, provide another op like readable and so on. I'd also suggest calling it something like _noinc (for non-incrementing) instead of _pipe as I was a bit confused about what a pipe read was. We could also have a software implementation for things like ADC outputs where the register doesn't have the convenient nonincrementing behaviour but we want to do repeated reads.
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