On Tue, Jul 02, 2013 at 01:01:00PM -0300, Fabio Estevam wrote: > According to mx23 erratum 2727: > > "2727 : I2C 9th Clock Pulse (ACK) not generated when RETAIN_CLOCK set. > > Description: > > When RETAIN_CLOCK is set, the ninth clock pulse (ACK) is not generated. > However, the SDA line is read at the proper timing interval. If > RETAIN_CLOCK is cleared, the ninth clock pulse is generated. > Also, the HW_I2C_VERSION register incorrectly states the version is 1.2. > It should be 1.3. > > Workaround: > HW_I2C_CTRL1[ACK_MODE] has default value of 0. It should be set to 1 to > enable the fix for this issue." > > It has also been noticed that mx28 needs to implement this fix in order to > have > SMBus to work properly. > > Reported-by: Christoph Baumann <[email protected]> > Signed-off-by: Fabio Estevam <[email protected]>
What's with this one? Bogus? Needed? Still needed after PIO rework?
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