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This would be useful for distro kernels, it's one less >>> thing that forces using a kernel with specific SoC support. > >> If the driver does not match on such generic compatible - and that's my >> impression from commit msg - then it is pretty useless. > > The driver can match on a generic compatible, it just doesn't right now. > It's getting the FIFO depth from the compatible but as I observe above > the minimum FIFO depth is known so we can just use that as the fallback, > we program the trigger points for the FIFO so it doesn't matter if there > is more space than we're using. So if I understand it correctly, 1. you'd rather the driver have a generic compatible such that we can have distro kernels not requiring specific SOC support for this driver. 2. AND it is possible to have a *sane* fallback by using the IP's generic minimum fifo depth. The DWC_i2c manual specifies IC_TX_BUFFER_DEPTH and IC_RX_BUFFER_DEPTH as 2..1024, so using depth of 2 as a fallback would be functional on any integration, just slower. Krzysztof, What are your thoughts on having a generic *fallback* compatible "snps,dwc-adv-i2c" , used after a SoC-specific one, i.e. compatible = "ti,tda54-i2c", "snps,dwc-adv-i2c"; The driver would match both. "ti,tda54-i2c" keeps its real 32/32 FIFO depths, and the fallback uses 2/2. Thanks, Aniket