On Thu, Jan 24, 2013 at 12:39:48PM +0100, Wolfram Sang wrote: > On Thu, Jan 24, 2013 at 07:18:47PM +0800, Mark Brown wrote: > > A read is typically implemented as a write of the register address > > followed by a read of the value, usually with the ability to free the > > bus in between. If two devices attempt to access the register map > > simultaneously this results in the address going wrong. > Could happen. But in what situations will one not use repeated start > here? Especially when designing a multi-master bus? Well, you're depending on the specific drivers doing things that way and it's actually quite rare for the controller drivers in Linux to support I2C_M_NOSTART which discourages this.
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