On Mon, Nov 18, 2013 at 04:29:21PM +0100, Thierry Reding wrote: > On Mon, Nov 18, 2013 at 01:57:27PM +0000, Mark Brown wrote: > > You'd need something class based like USB, there's such massive > > variation in what the hardware is trying to do and the tradeoffs. A big > > issue is that especially with I2C many of the devices are primarily > > analogue devices implemnted in larger processes where the cost of adding > > additional digital logic can have a noticeable effect on the area and > > hence cost of the silicon. > My comments were mostly regarding the interface controllers. Those which > generate the same bus transactions but need different drivers on every > SoC. I suspect that the same costs don't apply (or at least not to the > same extent) to SoCs. Oh, right. In that space I suspect you'd face apathy on the part of vendors for switching away from their existing validated and deployed IPs - probably the best shot would be a freely licensed reference implementation that people could pick up if they wanted. It's plausible that some of the vendors might do so for SPI where there are a bunch of chips that don't have DMA/FIFOs yet and so could possibly benefit from performance and feature gains but without that sort of benefit it's hard to see what would be persuasive for the vendors.
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