On Mon, Nov 27, 2017 at 05:31:00PM +0100, Peter Rosin wrote: > With a nxp,se97 chip on an atmel sama5d31 board, the I2C adapter driver > is not always capable of avoiding the 25-35 ms timeout as specified by > the SMBUS protocol. This may cause silent corruption of the last bit of > any transfer, e.g. a one is read instead of a zero if the sensor chip > times out. This also affects the eeprom half of the nxp-se97 chip, where > this silent corruption was originally noticed. Other I2C adapters probably > suffer similar issues, e.g. bit-banging comes to mind as risky... > > The SMBUS register in the nxp chip is not a standard Jedec register, but > it is not special to the nxp chips either, at least the atmel chips > have the same mechanism. Therefore, do not special case this on the > manufacturer, it is opt-in via the device property anyway. > > Signed-off-by: Peter Rosin <peda@xxxxxxxxxx> > --- > Documentation/devicetree/bindings/hwmon/jc42.txt | 4 ++++ Acked-by: Rob Herring <robh@xxxxxxxxxx> > drivers/hwmon/jc42.c | 21 +++++++++++++++++++++ > 2 files changed, 25 insertions(+) -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
